Store chunk tile data as a dense minified grid instead of per-tile objects

Cuts the six overworld chunk JSON files from 146KB to 10KB by replacing {"pos":[x,y,z],"type":t,"tile":u} entries with a fixed 256-slot array (index x + y*16, value null or [type, z]) and dropping pretty-printing. Co-Authored-By: Claude Sonnet 5 <[email protected]>
Add a perf timing/stack module and start using it to diagnose PSP hitching
2026-09-09 15:28:22 -05:00 · 2026-09-09 15:16:48 -05:00 · 2026-09-09 14:05:19 -05:00 · 2026-09-09 10:17:34 -05:00 · 2026-09-08 12:49:20 -05:00 · 2026-09-08 12:49:13 -05:00
552 changed files with 31536 additions and 18898 deletions
@@ -107,3 +107,4 @@ yarn.lock
 /assets/test
 /tools_old
 /assets/test.png
 /assets/audio/boa.mp3
@@ -1,455 +0,0 @@
 # Dusk — Claude Code rules
 ## File headers
 Every C, H, and JS file starts with:
 ```c
 /**
 * Copyright (c) 2026 Dominic Masters
 *
 * This software is released under the MIT License.
 * https://opensource.org/licenses/MIT
 */
 ```
 JS files use `//` comment style instead.
 ---
 ## C conventions
 ### Types
 Always use the project-defined aliases instead of bare C primitives:
 | Use       | Not          |
 |-----------|--------------|
 | `bool_t`  | `bool`       |
 | `int_t`   | `int`        |
 | `float_t` | `float`      |
 | `char_t`  | `char`       |
 Use `uint8_t`, `uint16_t`, `int32_t`, etc. for fixed-width integers.
 All struct and enum types end in `_t` (`animation_t`, `errorret_t`, …).
 ### Naming
 - **Functions** — snake_case, prefixed with their module:
  `assetLock()`, `entityPositionInit()`, `moduleAssetBatchCtor()`
 - **Struct fields** — camelCase: `keyframeCount`, `localPosition`
 - **Macros / constants** — UPPER_SNAKE_CASE:
  `ENTITY_ID_INVALID`, `ERROR_OK`, `COMPONENT_TYPE_COUNT`
 - **Files** — snake_case matching the primary type: `entityposition.c`,
  `moduleassetbatch.c`
 ### Header files (`.h`)
 - Use `#pragma once` — no include guards.
 - Declare every public function, `#define`, and `extern` global.
 - Write a JSDoc block (`/** … */`) above every declaration explaining
  purpose, `@param`s, and `@returns`.
 - Only include headers that the `.h` file itself strictly requires for
  the types it exposes. Move everything else to the `.c` file.
  Do not use forward declarations as a workaround — use the real
  include in the `.c` file instead.
 ### Implementation files (`.c`)
 - Contain function bodies only; no declarations.
 - Pull in whatever additional includes the implementation needs.
 - Do not use `static` or `inline` on **functions**. Every function,
  including internal helpers, must be declared in the matching `.h` and
  defined in the `.c` file. Internal helpers belong near the bottom of
  the `.c` file, not at the top with a `static` qualifier.
  `static` and `inline` on functions are only appropriate when the
  function body is written directly inside a `.h` file.
  `static` on **variables** (file-scope state) is fine and expected.
 ### Formatting
 - Hard-wrap all lines at **80 characters**.
 ### Error handling
 Return `errorret_t` from fallible functions. Use these macros:
 ```c
 errorOk();                    // return success
 errorThrow("msg %d", val);    // return failure with message
 errorChain(someCall());       // propagate failure, continue on success
 errorIsOk(ret) / errorIsNotOk(ret)  // test a result
 errorCatch(ret);              // handle + free an error
 ```
 Never return raw error codes or use `errno` for in-engine errors.
 ### Memory
 Use the project allocator — never raw `malloc`/`free`:
 ```c
 memoryAllocate(size)          // allocate
 memoryFree(ptr)               // free
 memoryZero(dest, size)        // zero a block
 memoryCopy(dest, src, size)   // copy
 ```
 ### Asserts
 Prefer specific assert macros over bare `assert()`:
 ```c
 assertNotNull(ptr, "msg");
 assertTrue(cond, "msg");
 assertFalse(cond, "msg");
 assertUnreachable("msg");
 assertIsMainThread("msg");
 ```
 ---
 ## Build system
 Each subdirectory has its own `CMakeLists.txt` that adds sources with:
 ```cmake
 target_sources(${DUSK_LIBRARY_TARGET_NAME}
  PUBLIC
    myfile.c
 )
 ```
 Never add source files to the root `CMakeLists.txt` directly.
 ---
 ## Platform support
 ### Targets
 Set `DUSK_TARGET_SYSTEM` at CMake configure time to select a platform:
 | `DUSK_TARGET_SYSTEM` | Macro defined     | Platform         |
 |----------------------|-------------------|------------------|
 | `linux`              | `DUSK_LINUX`      | Linux desktop    |
 | `knulli`             | `DUSK_KNULLI`     | Knulli (handheld)|
 | `psp`                | `DUSK_PSP`        | Sony PSP         |
 | `vita`               | `DUSK_VITA`       | PlayStation Vita |
 | `gamecube`           | `DUSK_GAMECUBE`   | Nintendo GameCube|
 | `wii`                | `DUSK_WII`        | Nintendo Wii     |
 ### Layer structure
 ```
 src/dusk/          core, platform-agnostic game logic
 src/duskgl/        OpenGL abstraction (Linux, Knulli, PSP, Vita)
 src/dusksdl2/      SDL2 window + input (Linux, Knulli, PSP, Vita)
 src/dusklinux/     Linux + Knulli platform impl
 src/duskpsp/       PSP platform impl
 src/duskvita/      Vita platform impl
 src/duskdolphin/   GameCube / Wii platform impl (no SDL2/OpenGL)
 ```
 Dolphin is the only target that bypasses SDL2 and OpenGL entirely —
 it uses native GameCube/Wii rendering and input APIs.
 ### Platform guards
 Use the compile-time macros for platform-specific code:
 ```c
 #ifdef DUSK_PSP
  // PSP-only path
 #elif defined(DUSK_GAMECUBE) || defined(DUSK_WII)
  // GameCube / Wii path
 #else
  // Generic / Linux fallback
 #endif
 ```
 Additional capability macros set per-target:
 `DUSK_SDL2`, `DUSK_OPENGL`, `DUSK_OPENGL_ES`, `DUSK_OPENGL_LEGACY`,
 `DUSK_INPUT_GAMEPAD`, `DUSK_INPUT_KEYBOARD`, `DUSK_INPUT_POINTER`,
 `DUSK_PLATFORM_ENDIAN_BIG` / `DUSK_PLATFORM_ENDIAN_LITTLE`.
 ### Abstraction pattern
 Platform-specific implementations are wired in via `#define` macros in
 each platform's `displayplatform.h` / `inputplatform.h` etc., which
 the core calls through. Functions that a platform does not support are
 simply left undefined — the core guards calls with `#ifdef`.
 ### Adding platform-specific code
 - Put it under `src/dusk<platform>/` in the matching subsystem folder.
 - Gate any core call-site with the appropriate `#ifdef DUSK_<PLATFORM>`
  or capability macro.
 - Keep the `src/dusk/` core free of platform ifdefs — delegate through
  the platform header macros instead.
 ---
 ## Adding a new asset loader type
 1. Add an enum value to `assetloadertype_t` (before `_COUNT`) in
   `src/dusk/asset/loader/assetloader.h`.
 2. Add fields to the input/loading/output unions in `assetloader.h`.
 3. Implement `assetXxxLoaderSync`, `assetXxxLoaderAsync`, and
   `assetXxxDispose` in a new `src/dusk/asset/loader/xxx/` directory.
 4. Register the three callbacks in `ASSET_LOADER_CALLBACKS[]` in
   `src/dusk/asset/loader/assetloader.c`.
 5. If user-facing, create a JS module (see below) and a `.d.ts` file.
 ---
 ## Adding a new entity component
 1. Create `src/dusk/entity/component/<category>/entityMyComp.h/.c` with
   struct `entityMyComp_t`, `entityMyCompInit()`, and optionally
   `entityMyCompDispose()`.
 2. Add the include to `src/dusk/entity/componentlist.h` header block.
 3. Add a row to `src/dusk/entity/componentlist.h`:
   ```c
   X(MYCOMP, entityMyComp_t, myComp, entityMyCompInit, NULL, NULL)
   ```
   This auto-generates the enum, union field, and definition entry.
 4. If JS-facing, create the script module and `.d.ts` (see below).
 ---
 ## Adding a new script (JS) module
 1. Create `src/dusk/script/module/<category>/moduleMyMod.h/.c`.
   - Declare `extern scriptproto_t MODULE_MYMOD_PROTO;` in the header.
   - Use `moduleBaseFunction(name)` to define JS-callable functions.
   - Register props/funcs in `moduleMyModInit()` with
     `scriptProtoDefineProp` / `scriptProtoDefineFunc` /
     `scriptProtoDefineStaticFunc`.
 2. `#include` the header in
   `src/dusk/script/module/modulelist.c` and call
   `moduleMyModInit()` in `moduleListInit()` (and `Dispose` in
   `moduleListDispose()`).
 3. For component modules also register in
   `src/dusk/script/module/entity/component/modulecomponentlist.c`
   so `entity.add()` returns the typed wrapper.
 4. Create `types/<category>/mymod.d.ts` and add a
   `/// <reference path="..." />` line to `types/index.d.ts`.
 ---
 ## Script module type declarations
 Whenever a `src/dusk/script/module/**/*.c` file is created or modified,
 check whether the corresponding `types/**/*.d.ts` needs updating and
 apply any changes before finishing the task.
 ---
 ## JavaScript (asset scripts)
 - Use `var` for module-level state; `const` for values that never
  change.
 - Always use semicolons.
 - Scene objects are plain objects (`var scene = {}`) with assigned
  methods.
 - Export via `module.exports = scene`.
 - Async scene init should use `async function` and `await`.
 ---
 ## Coding style
 ### ASCII only
 Source files (`.c`, `.h`, `.js`) must contain only ASCII characters (U+0000–U+007F).
 Non-ASCII characters are banned even in comments and string literals.
 Use ASCII-only substitutes instead:
 - `--` or `-` instead of `—` (em dash)
 - `->` instead of `→` (arrow)
 - `x` or `*` instead of `×` (multiplication)
 Only non-script asset files (e.g. `.po` locale files) may contain non-ASCII text.
 ### Indentation
 2 spaces. No tabs.
 ### Keyword and operator spacing
 No space between a keyword or function name and its opening parenthesis:
 ```c
 if(!ptr) return;
 for(uint8_t i = 0; i < count; i++) {
 while(entry->state != DONE) {
 switch(type) {
 sizeof(assetbatch_t)
 memoryZero(ptr, size)
 ```
 Spaces around all binary operators and after every comma:
 ```c
 pos->flags |= ENTITY_POSITION_FLAG_WORLD_DIRTY;
 (size_t)end - (size_t)start
 foo(a, b, c)
 ```
 ### Braces
 Opening brace on the **same line** as the statement (K&R style) for all
 constructs — functions, `if`, `else`, `for`, `while`, `switch`:
 ```c
 void assetEntryLock(assetentry_t *entry) {
  ...
 }
 if(dirty) {
  ...
 } else {
  ...
 }
 ```
 ### Guard returns
 Short guards go on one line with no braces:
 ```c
 if(!ptr) return;
 if(!b || !b->batch) return jerry_undefined();
 if(!(flags & DIRTY)) return;
 ```
 ### Blank lines
 - One blank line between functions; no blank line at the start or end of
  a function body.
 - One blank line between logical blocks inside a function body.
 - No trailing blank lines at the end of a file.
 ### Pointer placement
 `*` is attached to the variable name, not the type:
 ```c
 assetentry_t *entry
 const char_t *name
 void *ptr
 uint8_t *d = (uint8_t *)dest;
 ```
 ### Casts
 Space between cast and operand:
 ```c
 (assetbatch_t *)user
 (uint8_t *)dest
 (textureformat_t)v
 ```
 ### Return
 No parentheses around the return value:
 ```c
 return ptr;
 return MEMORY_POINTERS_IN_USE;
 ```
 ### switch / case
 `case` indented 2 spaces from `switch`; body indented 2 more from `case`:
 ```c
 switch(type) {
  case ASSET_LOADER_TYPE_TEXTURE:
    descs[i].input.texture = (textureformat_t)v;
    break;
  default:
    break;
 }
 ```
 ### Multi-line function signatures
 When parameters don't fit on one line, put each on its own line indented
 2 spaces; the closing `) {` (definition) or `);` (declaration) goes on
 its own line at column 0:
 ```c
 void assetEntryInit(
  assetentry_t *entry,
  const char_t *name,
  const assetloadertype_t type,
  assetloaderinput_t *input
 ) {
 errorret_t memoryCompare(
  const void *a,
  const void *b,
  const size_t size
 );
 ```
 ### Structs and enums
 Anonymous inner struct or enum with a `typedef`, `_t` suffix, closing
 brace and name on the same line:
 ```c
 typedef struct {
  errorcode_t code;
  char_t *message;
 } errorstate_t;
 typedef enum {
  ASSET_LOADER_TYPE_NULL,
  ASSET_LOADER_TYPE_COUNT
 } assetloadertype_t;
 ```
 ### Designated initialisers
 Spaces inside braces; `.field = value`:
 ```c
 jsassetentry_t e = { .entry = entry };
 assetbatchloadedpend_t init = { .batch = batch };
 ```
 ### Ternary operator
 Spaces around `?` and `:`:
 ```c
 const float val = psx > 0.0f ? pt[0][0] / psx : 0.0f;
 ```
 ### const placement
 `const` before the type, `*` attached to the variable:
 ```c
 const char_t *name
 const void *src
 const size_t size
 ```
 ### Comments in `.c` files
 - Do not use section dividers (`/* ---- ... ---- */`). Just let the
  functions follow one another with a single blank line between them.
 - Multi-line explanatory comments inside function bodies use `//` lines:
  ```c
  // Script modules are freed; orphaned JS wrapper objects now get GC'd
  // so their finalizers fire before assetDispose() checks ref counts.
  jerry_heap_gc(JERRY_GC_PRESSURE_HIGH);
  ```
 - Do not use `/* */` for inline or inline-block comments inside `.c`
  function bodies.
 ### Comments in `.h` files
 Every public declaration gets a Javadoc block (`/** … */`) with
 `@param` and `@returns` where relevant. Keep it on the lines immediately
 above the declaration with no blank line in between.
 ---
 ## Color system
 Colors are defined in `src/dusk/display/color.csv` and code-generated
 into a `color.h` header by `tools/color/csv/__main__.py`.
 Each row in the CSV has `name,r,g,b,a` with channel values in `[0.0, 1.0]`.
 The script emits four `#define` variants per color plus a bare alias:
 ```
 COLOR_<NAME>_4B   color4b(r8, g8, b8, a8)   // default alias target
 COLOR_<NAME>_3B   color3b(r8, g8, b8)
 COLOR_<NAME>_3F   color3f(rf, gf, bf)
 COLOR_<NAME>_4F   color4f(rf, gf, bf, af)
 COLOR_<NAME>      COLOR_<NAME>_4B
 ```
 `color_t` is `color4b_t` (four `uint8_t` channels).
 To add a new color, append a row to `color.csv` and rebuild — do not
 hand-edit the generated header.
 ---
 ## Tests
 - Tests live in `test/` mirroring `src/dusk/` structure.
 - Use cmocka; include `dusktest.h`.
 - Test functions: `static void test_something(void **state)`.
 - After each test, assert `memoryGetAllocatedCount() == 0` to catch
  leaks.
 - Build with `-DDUSK_BUILD_TESTS=ON`.
@@ -8,16 +8,22 @@ cmake_minimum_required(VERSION 3.13)
 set(CMAKE_C_STANDARD 11)
 set(CMAKE_C_STANDARD_REQUIRED ON)
-set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} ${CMAKE_CURRENT_SOURCE_DIR}/cmake/modules)
+set(CMAKE_MODULE_PATH
  ${CMAKE_MODULE_PATH}
  ${CMAKE_CURRENT_SOURCE_DIR}/cmake/modules
 )
 cmake_policy(SET CMP0079 NEW)
 # set(FETCHCONTENT_UPDATES_DISCONNECTED ON)
 option(DUSK_BUILD_TESTS "Enable tests" OFF)
 option(DUSK_NETWORK "Enable network support" ON)
 set(DUSK_GAME_NAME "Dusk" CACHE STRING "Game display name")
 set(DUSK_GAME_AUTHOR "YourWishes" CACHE STRING "Game author / coder")
 set(DUSK_GAME_SHORT_DESCRIPTION "Dusk game" CACHE STRING "One-line description")
-set(DUSK_GAME_LONG_DESCRIPTION  "No description yet." CACHE STRING "Full description")
+set(DUSK_GAME_LONG_DESCRIPTION
  "No description yet." CACHE STRING "Full description"
 )
 # Prep cache
 set(DUSK_CACHE_TARGET "dusk-target")
@@ -31,13 +37,19 @@ set(DUSK_TEMP_DIR "${DUSK_BUILD_DIR}/temp")
 set(DUSK_TOOLS_DIR "${DUSK_ROOT_DIR}/tools")
 set(DUSK_DATA_DIR "${DUSK_ROOT_DIR}/data")
 set(DUSK_ASSETS_DIR "${DUSK_ROOT_DIR}/assets")
-set(DUSK_BUILT_ASSETS_DIR "${DUSK_BUILD_DIR}/built_assets" CACHE INTERNAL ${DUSK_CACHE_TARGET})
+set(DUSK_BUILT_ASSETS_DIR "${DUSK_BUILD_DIR}/built_assets"
  CACHE INTERNAL ${DUSK_CACHE_TARGET}
 )
 set(DUSK_GENERATED_HEADERS_DIR "${DUSK_BUILD_DIR}/generated")
-set(DUSK_BUILD_BINARY ${DUSK_BUILD_DIR}/Dusk CACHE INTERNAL ${DUSK_CACHE_TARGET})
+set(DUSK_BUILD_BINARY ${DUSK_BUILD_DIR}/Dusk
  CACHE INTERNAL ${DUSK_CACHE_TARGET}
 )
 set(DUSK_ASSETS "" CACHE INTERNAL ${DUSK_CACHE_TARGET})
 set(DUSK_LIBRARY_TARGET_NAME "DuskCore" CACHE INTERNAL ${DUSK_CACHE_TARGET})
 set(DUSK_BINARY_TARGET_NAME "Dusk" CACHE INTERNAL ${DUSK_CACHE_TARGET})
-set(DUSK_ASSETS_ZIP "${DUSK_BUILD_DIR}/dusk.dsk" CACHE INTERNAL ${DUSK_CACHE_TARGET})
+set(DUSK_ASSETS_ZIP "${DUSK_BUILD_DIR}/dusk.dsk"
  CACHE INTERNAL ${DUSK_CACHE_TARGET}
 )
 if(NOT DEFINED DUSK_TARGET_SYSTEM)
  set(DUSK_TARGET_SYSTEM "linux")
@@ -72,7 +84,9 @@ if(DUSK_BUILD_TESTS)
      ${DUSK_LIBRARY_TARGET_NAME}
  )
 else()
-  set(DUSK_LIBRARY_TARGET_NAME "${DUSK_BINARY_TARGET_NAME}" CACHE INTERNAL ${DUSK_CACHE_TARGET})
+  set(DUSK_LIBRARY_TARGET_NAME "${DUSK_BINARY_TARGET_NAME}"
    CACHE INTERNAL ${DUSK_CACHE_TARGET}
  )
 endif()
 if(NOT DEFINED DUSK_VERSION)
@@ -90,6 +104,12 @@ target_compile_definitions(${DUSK_LIBRARY_TARGET_NAME}
    DUSK_VERSION="${DUSK_VERSION}"
 )
 if(DUSK_NETWORK)
  target_compile_definitions(${DUSK_LIBRARY_TARGET_NAME} PUBLIC
    DUSK_NETWORK
  )
 endif()
 # Toolchains
 include(cmake/targets/${DUSK_TARGET_SYSTEM}.cmake)
@@ -115,16 +135,21 @@ if(DUSK_BUILD_TESTS)
  add_subdirectory(test)
 endif()
-# Build assets
+# Build assets. Runs unconditionally on every build (rather than being
-file(GLOB_RECURSE DUSK_ASSET_FILES CONFIGURE_DEPENDS "${DUSK_ASSETS_DIR}/*")
+# gated behind a custom_command's file-level DEPENDS list) because
-add_custom_command(
+# CONFIGURE_DEPENDS globs only pick up added/removed files on the next
-  OUTPUT "${DUSK_ASSETS_ZIP}"
+# CMake configure, so that approach could miss/lag a rebuild behind an
 # asset edit. tools.asset.pack itself decides whether anything actually
 # changed (see its manifest check) and no-ops quickly when nothing did,
 # so this stays cheap on a build where assets are untouched.
 add_custom_target(DUSK_ASSETS_BUILT ALL
  COMMAND ${CMAKE_COMMAND} -E make_directory "${DUSK_ASSETS_DIR}"
-  COMMAND ${CMAKE_COMMAND} -E rm -f "${DUSK_ASSETS_ZIP}"
+  COMMAND ${Python3_EXECUTABLE} -m tools.asset.pack
-  COMMAND ${CMAKE_COMMAND} -E tar "cf" "${DUSK_ASSETS_ZIP}" --format=zip -- .
+    --input "${DUSK_ASSETS_DIR}"
-  WORKING_DIRECTORY "${DUSK_ASSETS_DIR}"
+    --output "${DUSK_ASSETS_ZIP}"
-  DEPENDS ${DUSK_ASSET_FILES}
+  WORKING_DIRECTORY "${DUSK_ROOT_DIR}"
  BYPRODUCTS "${DUSK_ASSETS_ZIP}"
  COMMENT "Packing assets into dusk.dsk"
  VERBATIM
 )
 add_custom_target(DUSK_ASSETS_BUILT DEPENDS "${DUSK_ASSETS_ZIP}")
 add_dependencies(${DUSK_LIBRARY_TARGET_NAME} DUSK_ASSETS_BUILT)
@@ -9,15 +9,18 @@ following packages, depending on your system;
 Fedora;
 ```
-sudo dnf install git make gcc cmake python python-polib python3-pillow python3-dotenv python3-numpy python-qt5 python3-pyopengl SDL2-devel zlib-devel libzip-devel bzip2-devel openssl-devel lzma-sdk-devel xz xz-devel lua-devel
+sudo dnf install git make gcc cmake python python-polib python3-pillow python3-dotenv python3-numpy python-qt5 python3-pyopengl SDL2-devel zlib-devel libzip-devel bzip2-devel openssl-devel lzma-sdk-devel xz xz-devel lua-devel libmad-devel
 ```
 `libmad-devel` (used for MP3 decoding) is GPL-licensed and ships in the
 [RPM Fusion](https://rpmfusion.org/) free repository rather than Fedora's
 base repos - make sure RPM Fusion is enabled first.
 Ubuntu;
 ```
-sudo apt-get install git build-essential gcc python python-polib python3-pillow python3-dotenv python3-numpy python3-pyqt5 python3-opengl
+sudo apt-get install git build-essential gcc python python-polib python3-pillow python3-dotenv python3-numpy python3-pyqt5 python3-opengl libmad0-dev
 ```
 Arch Linux;
 ```
-sudo pacman -S git base-devel gcc python python-polib python-pillow python-dotenv python-numpy python-pyqt5 python-opengl
+sudo pacman -S git base-devel gcc python python-polib python-pillow python-dotenv python-numpy python-pyqt5 python-opengl libmad
 ```
@@ -0,0 +1,68 @@
 {
  "items": [
    // First thing, try and find a save device, used for settings and what not.
    {
      "type": "MODAL",
      "title": "initial.checking_save.title",
      "message": "initial.checking_save.message"
    },
    {
      "type": "WAIT",
      "seconds": 0.2
    },
    {
      "type": "SAVE_DEVICE_CHECK",
      "successMarker": "CONTINUE",
      "failureMarker": "SAVE_DEVICE_NOT_FOUND"
    },
    // No save device found
    {
      "type": "MARKER",
      "name": "SAVE_DEVICE_NOT_FOUND"
    },
    {
      "type": "MODAL_CLOSE"
    },
    {
      "type": "MODAL_OPTIONS_MARKERS",
      "title": "initial.no_device.title",
      "message": "initial.no_device.message",
      "options": [
        {
          "text": "initial.no_device.retry",
          "marker": "SAVE_DEVICE_RETRY"
        },
        {
          "text": "initial.no_device.continue",
          "marker": "CONTINUE"
        }
      ]
    },
    // Save device not found, user to retry, just close modal and loop
    {
      "type": "MARKER",
      "name": "SAVE_DEVICE_RETRY"
    },
    {
      "type": "MODAL_CLOSE"
    },
    {
      "type": "RESTART"
    },
    // Save device found (or continuing without one)
    {
      "type": "MARKER",
      "name": "CONTINUE"
    },
    {
      "type": "MODAL_CLOSE"
    },
    {
      "type": "CUTSCENE",
      "name": "main_menu"
    }
  ]
 }
@@ -0,0 +1,140 @@
 {
  "items": [
    {
      "type": "MARKER",
      "name": "MAIN_MENU_IDLE"
    },
    {
      "type": "UI_SHOW",
      "name": "main_menu"
    },
    // Options button goes here - no options screen yet, so this is just
    // an alias landing right back on the idle loop below.
    {
      "type": "MARKER",
      "name": "OPTIONS"
    },
    {
      "type": "IDLE"
    },
    // New Game button goes here.
    {
      "type": "MARKER",
      "name": "NEW_GAME"
    },
    {
      "type": "MODAL",
      "title": "main_menu.checking_save.title",
      "message": "main_menu.checking_save.message"
    },
    {
      "type": "WAIT",
      "seconds": 0.2
    },
    {
      "type": "SAVE_DEVICE_CHECK",
      "successMarker": "SAVE_DEVICE_FOUND",
      "failureMarker": "SAVE_DEVICE_NOT_FOUND"
    },
    // Save device not found
    {
      "type": "MARKER",
      "name": "SAVE_DEVICE_NOT_FOUND"
    },
    {
      "type": "MODAL_CLOSE"
    },
    {
      "type": "MODAL_OPTIONS_MARKERS",
      "title": "main_menu.no_device.title",
      "message": "main_menu.no_device.message",
      "options": [
        {
          "text": "main_menu.no_device.retry",
          "marker": "NEW_GAME"
        },
        {
          "text": "main_menu.no_device.continue",
          "marker": "SAVE_DEVICE_FOUND"
        }
      ]
    },
    // Save data failed to load (e.g. corrupt/unreadable) - only option is
    // to retry, no "continue without saving" here since we already know a
    // device is present.
    {
      "type": "MARKER",
      "name": "LOAD_ERROR"
    },
    {
      "type": "MODAL_OPTIONS_MARKERS",
      "title": "main_menu.save_load_error.title",
      "message": "main_menu.save_load_error.message",
      "options": [
        {
          "text": "main_menu.save_load_error.retry",
          "marker": "NEW_GAME"
        }
      ]
    },
    // Quit Game button goes here. Cancelling jumps back to
    // MAIN_MENU_IDLE; confirming falls through to QUIT_GAME, which
    // ends the process directly.
    {
      "type": "MARKER",
      "name": "QUIT"
    },
    {
      "type": "MODAL_OPTIONS_MARKERS",
      "title": "main_menu.quit_confirm",
      "options": [
        {
          "text": "ui.confirm.confirm",
          "marker": "QUIT_CONFIRMED"
        },
        {
          "text": "ui.confirm.cancel",
          "marker": "MAIN_MENU_IDLE"
        }
      ]
    },
    {
      "type": "MARKER",
      "name": "QUIT_CONFIRMED"
    },
    {
      "type": "QUIT_GAME"
    },
    // main menu just listens for cutscene ending to show the select save modal
    // so we have that here.
    {
      "type": "MARKER",
      "name": "SAVE_DEVICE_FOUND"
    },
    {
      "type": "MODAL_CLOSE"
    },
    {
      "type": "SAVE_LOAD_ALL_SLOTS",
      "successMarker": "LOADED",
      "failureMarker": "LOAD_ERROR"
    },
    // Must be the very last item - falling off the end here is what
    // completes the cutscene and fires uiMainMenuOpenSelectSave (see
    // cutsceneSystemSetOnComplete in ui/screen/mainmenu/uimainmenu.c).
    // Placing this anywhere earlier would fall through into whatever
    // comes next instead (e.g. the QUIT block, if placed just before it).
    {
      "type": "MARKER",
      "name": "LOADED"
    }
  ]
 }
@@ -5,11 +5,107 @@ msgstr ""
 "Content-Type: text/plain; charset=UTF-8\n"
 "Plural-Forms: nplurals=4; plural=(n==1 ? 0 : n==2 ? 1 : (n<7 ? 2 : 3));\n"
 # Initial Scene
 msgid "initial.checking_save.title"
 msgstr "Checking for save data"
 msgid "initial.checking_save.message"
 msgstr "Please wait..."
 msgid "initial.no_device.title"
 msgstr "No Save Device Found"
 msgid "initial.no_device.message"
 msgstr "Could not find a save device, ensure it is connected and try again. You can continue, but progress will not be saved."
 msgid "initial.no_device.retry"
 msgstr "Try again"
 msgid "initial.no_device.continue"
 msgstr "Continue without saving"
 # Main Menu Scene
 msgid "main_menu.start_game"
 msgstr "Start Game"
 msgid "main_menu.options"
 msgstr "Options"
 msgid "main_menu.quit"
 msgstr "Quit Game"
 msgid "main_menu.quit_confirm"
 msgstr "Are you sure you want to quit?"
 msgid "main_menu.checking_save.title"
 msgstr "Checking for save data"
 msgid "main_menu.checking_save.message"
 msgstr "Please wait..."
 msgid "main_menu.no_device.title"
 msgstr "No Save Device Found"
 msgid "main_menu.no_device.message"
 msgstr "Could not find a save device, ensure it is connected and try again. You can continue, but progress will not be saved."
 msgid "main_menu.no_device.retry"
 msgstr "Try again"
 msgid "main_menu.no_device.continue"
 msgstr "Continue without saving"
 msgid "main_menu.save_load_error.title"
 msgstr "Error"
 msgid "main_menu.save_load_error.message"
 msgstr "Failed to load save data. Please try again."
 msgid "main_menu.save_load_error.retry"
 msgstr "Try Again"
 # Select Save Screen
 msgid "ui.select_save.title"
 msgstr "Select Save"
 msgid "ui.select_save.empty"
 msgstr "Empty Slot"
 msgid "ui.select_save.slot_format"
 msgstr "%s  Lv.%d  %s"
 msgid "ui.select_save.delete_mode"
 msgstr "Delete a Save"
 msgid "ui.select_save.delete_confirm"
 msgstr "Are you sure you want to delete this save?"
 msgid "ui.select_save.name_title"
 msgstr "Enter game save file name"
 msgid "ui.save_slot.number_format"
 msgstr "Slot %d"
 #: ui/menu.c:10
 msgid "ui.title"
 msgstr ""
 "Welcome"
 msgid "save.linux.mkdirp_failed"
 msgstr "Failed to create save directory, check the disk is not full or write-protected."
 #: src/dusk/ui/frame/settings/uisettings.c
 msgid "ui.settings.tabs.general"
 msgstr "General"
@@ -56,6 +152,114 @@ msgstr "Items"
 msgid "ui.game_menu.settings"
 msgstr "Settings"
 #: src/dusk/ui/frame/game/uigamemenu.c
 msgid "ui.game_menu.save"
 msgstr "Save"
 #: src/dusk/ui/frame/game/uigamemenu.c
 msgid "ui.game_menu.save_success"
 msgstr "Game saved."
 #: src/dusk/ui/frame/game/uigamemenu.c
 msgid "ui.game_menu.save_cancelled"
 msgstr "Save cancelled."
 #: src/dusk/ui/frame/game/uigamemenu.c
 msgid "ui.game_menu.save_unavailable"
 msgstr "Can't save - no save device found."
 #: src/dusk/ui/frame/game/uigamemenu.c
 msgid "ui.game_menu.save_temporary"
 msgstr "This session is temporary - no save device was found, so saving is disabled."
 #: src/dusk/ui/frame/game/uigamemenu.c
 msgid "ui.game_menu.save_create_confirm"
 msgstr "No save data found. Create a new save?"
 #: src/dusk/ui/frame/game/uigamemenu.c
 msgid "ui.game_menu.save_failed_format"
 msgstr "Save failed: %s"
 #: src/dusk/ui/frame/game/uigamemenu.c
 msgid "ui.game_menu.save_check_failed_format"
 msgstr "Can't save: %s"
 #: src/dusk/ui/frame/initial/uiinitialnocard.c
 msgid "ui.initial.no_card.message"
 msgstr "No save device found. You can continue, but\nprogress will not be saved."
 #: src/dusk/ui/frame/initial/uiinitialnocard.c
 msgid "ui.initial.no_card.retry"
 msgstr "Retry"
 #: src/dusk/ui/frame/initial/uiinitialnocard.c
 msgid "ui.initial.no_card.continue"
 msgstr "Continue Anyway"
 #: src/dusk/ui/frame/initial/uiinitialcreatesave.c
 msgid "ui.initial.create_save.message"
 msgstr "No save data found. Create a new save?"
 #: src/dusk/ui/frame/initial/uiinitialcreatesave.c
 msgid "ui.initial.create_save.yes"
 msgstr "Yes"
 #: src/dusk/ui/frame/initial/uiinitialcreatesave.c
 msgid "ui.initial.create_save.no"
 msgstr "No"
 #: src/dusk/ui/frame/uiconfirm.c
 msgid "ui.confirm.confirm"
 msgstr "Confirm"
 #: src/dusk/ui/frame/uiconfirm.c
 msgid "ui.confirm.cancel"
 msgstr "Cancel"
 #: src/dusk/ui/frame/battle/uibattlemenu.c
 msgid "ui.battle.menu.attack"
 msgstr "Attack"
 #: src/dusk/ui/frame/battle/uibattlemenu.c
 msgid "ui.battle.menu.flee"
 msgstr "Flee"
 #: src/dusk/ui/frame/battle/uibattlemenu.c
 msgid "ui.battle.menu.target_format"
 msgstr "Enemy %u (%u/%u HP)"
 #: src/dusk/ui/frame/battle/uibattlehud.c
 msgid "ui.battle.hud.hp_format"
 msgstr "HP %u/%u"
 #: src/dusk/ui/frame/battle/uibattlehud.c
 msgid "ui.battle.hud.mp_format"
 msgstr "MP %u/%u"
 #: src/dusk/ui/frame/settings/uisettingsaudio.c
 msgid "ui.settings.audio.placeholder"
 msgstr "No audio settings yet"
 #: src/dusk/ui/frame/settings/uisettingsdisplay.c
 msgid "ui.settings.display.placeholder"
 msgstr "No display settings yet"
 #: src/dusk/ui/frame/settings/uisettingsinput.c
 msgid "ui.settings.input.placeholder"
 msgstr "No input settings yet"
 #: src/dusk/ui/frame/backpack/uibackpack.c
 msgid "ui.backpack.category_format"
 msgstr "Category %u"
 #: src/dusk/ui/overlay/uiloading.c
 msgid "ui.loading.text"
 msgstr "loading"
 #: src/dusk/ui/overlay/uiautosave.c
 msgid "ui.autosave.saving"
 msgstr "SAVING"
 msgid "item.potion.name"
 msgstr "Potion"
@@ -1,70 +0,0 @@
 msgid ""
 msgstr ""
 "Project-Id-Version: ExampleApp 1.0\n"
 "Language: es\n"
 "Content-Type: text/plain; charset=UTF-8\n"
 "Plural-Forms: nplurals=2; plural=(n==1 ? 0 : 1);\n"
 #: ui/menu.c:10
 msgid "ui.title"
 msgstr ""
 "Bienvenido"
 #: src/dusk/ui/frame/settings/uisettings.c
 msgid "ui.settings.tabs.general"
 msgstr "General"
 #: src/dusk/ui/frame/settings/uisettings.c
 msgid "ui.settings.tabs.input"
 msgstr "Entrada"
 #: src/dusk/ui/frame/settings/uisettings.c
 msgid "ui.settings.tabs.display"
 msgstr "Pantalla"
 #: src/dusk/ui/frame/settings/uisettings.c
 msgid "ui.settings.tabs.audio"
 msgstr "Audio"
 msgid "ui.settings.input.deadzone"
 msgstr "Deadzone"
 #: src/dusk/ui/frame/settings/uisettingsgeneral.c
 msgid "ui.settings.general.language"
 msgstr "Idioma"
 #: src/dusk/ui/frame/settings/uisettingsgeneral.c
 msgid "ui.settings.general.language_detail"
 msgstr "Se aplica después de reiniciar la aplicación."
 #: src/dusk/ui/frame/settings/uisettings.c
 msgid "ui.settings.apply"
 msgstr "Aplicar"
 #: src/dusk/ui/frame/uiconfirm.c
 msgid "ui.confirm.discard_changes"
 msgstr "¿Descartar los cambios no guardados?"
 #: src/dusk/ui/frame/game/uigamemenu.c
 msgid "ui.game_menu.characters"
 msgstr "Personajes"
 #: src/dusk/ui/frame/game/uigamemenu.c
 msgid "ui.game_menu.items"
 msgstr "Objetos"
 #: src/dusk/ui/frame/game/uigamemenu.c
 msgid "ui.game_menu.settings"
 msgstr "Configuración"
 #: src/dusk/rpg/item/item.json
 msgid "item.potion.name"
 msgstr "Poción"
 #: src/dusk/rpg/item/item.json
 msgid "item.potato.name"
 msgstr "Papa"
 #: src/dusk/rpg/item/item.json
 msgid "item.apple.name"
 msgstr "Manzana"
@@ -1,70 +0,0 @@
 msgid ""
 msgstr ""
 "Project-Id-Version: ExampleApp 1.0\n"
 "Language: ja\n"
 "Content-Type: text/plain; charset=UTF-8\n"
 "Plural-Forms: nplurals=1; plural=(0);\n"
 #: ui/menu.c:10
 msgid "ui.title"
 msgstr ""
 "歓迎"
 #: src/dusk/ui/frame/settings/uisettings.c
 msgid "ui.settings.tabs.general"
 msgstr "一般"
 #: src/dusk/ui/frame/settings/uisettings.c
 msgid "ui.settings.tabs.input"
 msgstr "入力"
 #: src/dusk/ui/frame/settings/uisettings.c
 msgid "ui.settings.tabs.display"
 msgstr "表示"
 #: src/dusk/ui/frame/settings/uisettings.c
 msgid "ui.settings.tabs.audio"
 msgstr "オーディオ"
 msgid "ui.settings.input.deadzone"
 msgstr "デッドゾーン"
 #: src/dusk/ui/frame/settings/uisettingsgeneral.c
 msgid "ui.settings.general.language"
 msgstr "言語"
 #: src/dusk/ui/frame/settings/uisettingsgeneral.c
 msgid "ui.settings.general.language_detail"
 msgstr "アプリケーションを再起動すると適用されます。"
 #: src/dusk/ui/frame/settings/uisettings.c
 msgid "ui.settings.apply"
 msgstr "適用"
 #: src/dusk/ui/frame/uiconfirm.c
 msgid "ui.confirm.discard_changes"
 msgstr "未保存の変更を破棄しますか？"
 #: src/dusk/ui/frame/game/uigamemenu.c
 msgid "ui.game_menu.characters"
 msgstr "キャラクター"
 #: src/dusk/ui/frame/game/uigamemenu.c
 msgid "ui.game_menu.items"
 msgstr "アイテム"
 #: src/dusk/ui/frame/game/uigamemenu.c
 msgid "ui.game_menu.settings"
 msgstr "設定"
 #: src/dusk/rpg/item/item.json
 msgid "item.potion.name"
 msgstr "ポーション"
 #: src/dusk/rpg/item/item.json
 msgid "item.potato.name"
 msgstr "ジャガイモ"
 #: src/dusk/rpg/item/item.json
 msgid "item.apple.name"
 msgstr "リンゴ"
@@ -0,0 +1 @@
 {"meshes":[{"file":"house_4_4.dmf","pos":[2,1,0]},{"file":"house_6_3.dmf","pos":[1,9,0]},{"file":"house_2_2.dmf","pos":[12,6,0]}],"tiles":[[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],null,null,null,null,[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],null,null,null,null,[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],null,null,null,null,[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],null,null,null,null,[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],null,null,[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],null,null,[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],null,null,null,null,null,null,[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],null,null,null,null,null,null,[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],null,null,null,null,null,null,[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0]]}
@@ -0,0 +1 @@
 {"tiles":[[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],null,null,null,null,null,[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],null,null,null,null,null,[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],null,null,null,null,null,[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[6,0],[2,0],[2,0],[2,0],[2,0],[2,0],[2,0],[7,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[3,0],[1,1],[1,1],[1,1],[1,1],[1,1],[1,1],[5,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[3,0],[1,1],[1,1],[1,1],[1,1],[1,1],[1,1],[5,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[3,0],[1,1],[1,1],[1,1],[1,1],[1,1],[1,1],[5,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[8,0],[4,0],[4,0],[4,0],[12,0],[1,1],[1,1],[5,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[3,0],[1,1],[1,1],[5,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[3,0],[1,1],[1,1],[5,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[8,0],[4,0],[4,0],[9,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0]],"meshes":[{"file":"house_5_3.dmf","pos":[1,1,0]}],"entities":[{"type":"global","globalId":3,"pos":[8,8,1]},{"type":"item","itemId":1,"quantity":1,"pos":[12,2,0]}],"areas":[{"min":[11,3,0],"max":[16,9,10],"callbackId":1,"notify":3,"trigger":6}]}
@@ -0,0 +1 @@
 {"meshes":[{"file":"house_8_4.dmf","pos":[1,1,0]},{"file":"house_3_3.dmf","pos":[11,2,0]},{"file":"house_2_2.dmf","pos":[3,11,0]}],"tiles":[[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],null,null,null,null,null,null,null,null,[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],null,null,null,null,null,null,null,null,[1,0],[1,0],null,null,null,[1,0],[1,0],[1,0],null,null,null,null,null,null,null,null,[1,0],[1,0],null,null,null,[1,0],[1,0],[1,0],null,null,null,null,null,null,null,null,[1,0],[1,0],null,null,null,[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],null,null,[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],null,null,[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0]]}
@@ -0,0 +1 @@
 {"meshes":[{"file":"house_3_2.dmf","pos":[1,1,0]},{"file":"house_2_3.dmf","pos":[7,2,0]},{"file":"house_4_2.dmf","pos":[1,8,0]},{"file":"house_1_1.dmf","pos":[11,10,0]},{"file":"house_5_2.dmf","pos":[13,6,0]}],"tiles":[[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],null,null,null,[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],null,null,null,[1,0],[1,0],[1,0],null,null,[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],null,null,[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],null,null,[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],null,null,null,[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],null,null,null,[1,0],null,null,null,null,[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],null,null,null,null,[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],null,[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0]]}
@@ -0,0 +1 @@
 {"meshes":[{"file":"house_5_5.dmf","pos":[3,2,0]},{"file":"house_2_3.dmf","pos":[10,3,0]},{"file":"house_3_1.dmf","pos":[1,12,0]}],"tiles":[[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],null,null,null,null,null,[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],null,null,null,null,null,[1,0],[1,0],null,null,[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],null,null,null,null,null,[1,0],[1,0],null,null,[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],null,null,null,null,null,[1,0],[1,0],null,null,[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],null,null,null,null,null,[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],null,null,null,[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0]]}
@@ -0,0 +1 @@
 {"tiles":[[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,3],[1,3],[1,3],[1,3],[1,3],[1,3],[1,0],[1,0],[1,0],[1,0],null,null,[1,0],[1,0],[1,0],[1,0],[1,3],[1,3],[1,3],[1,3],[1,3],[1,3],[1,0],[1,0],[1,0],[1,0],null,null,[1,0],[1,0],[1,0],[1,0],[1,3],[1,3],[1,3],[1,3],[1,3],[1,3],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[4,2],[4,2],[4,2],[4,2],[4,2],[4,2],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[4,1],[4,1],[4,1],[4,1],[4,1],[4,1],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[4,0],[4,0],[4,0],[4,0],[4,0],[4,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0]],"meshes":[]}
@@ -1,10 +0,0 @@
 {
  "mesh": "meshes/chunks/chunk_-1_0_0_0.dmf",
  "color": [
    255,
    255,
    255,
    255
  ],
  "texture": "tiles.png"
 }
@@ -1,10 +0,0 @@
 {
  "mesh": "meshes/chunks/chunk_0_0_0_0.dmf",
  "color": [
    255,
    255,
    255,
    255
  ],
  "texture": "tiles.png"
 }
@@ -1,10 +0,0 @@
 {
  "mesh": "meshes/chunks/chunk_0_1_0_0.dmf",
  "color": [
    255,
    255,
    255,
    255
  ],
  "texture": "tiles.png"
 }
@@ -1,10 +0,0 @@
 {
  "mesh": "meshes/chunks/chunk_1_0_0_0.dmf",
  "color": [
    255,
    255,
    255,
    255
  ],
  "texture": "tiles.png"
 }
@@ -1,10 +0,0 @@
 {
  "mesh": "meshes/chunks/chunk_1_1_0_0.dmf",
  "color": [
    255,
    255,
    255,
    255
  ],
  "texture": "tiles.png"
 }
@@ -1,10 +0,0 @@
 {
  "mesh": "meshes/chunks/chunk_2_0_0_0.dmf",
  "color": [
    255,
    255,
    255,
    255
  ],
  "texture": "tiles.png"
 }
@@ -0,0 +1,32 @@
 # Copyright (c) 2026 Dominic Masters
 #
 # This software is released under the MIT License.
 # https://opensource.org/licenses/MIT
 # NOTE: libmad itself is GPL-licensed (see https://www.underbit.com/products/mad/),
 # not MIT like the rest of this project. Any binary linking it must comply
 # with the GPL - a deliberate tradeoff accepted for MP3 decode correctness
 # (see audiostreammp3decodersw.c's own comment on why minimp3 wasn't enough).
 find_path(LIBMAD_INCLUDE_DIR NAMES mad.h)
 mark_as_advanced(LIBMAD_INCLUDE_DIR)
 find_library(LIBMAD_LIBRARY NAMES mad)
 mark_as_advanced(LIBMAD_LIBRARY)
 include(FindPackageHandleStandardArgs)
 find_package_handle_standard_args(
  libmad
  REQUIRED_VARS
    LIBMAD_LIBRARY
    LIBMAD_INCLUDE_DIR
 )
 if(libmad_FOUND AND NOT TARGET libmad::mad)
  add_library(libmad::mad UNKNOWN IMPORTED)
  set_target_properties(libmad::mad
    PROPERTIES
      INTERFACE_INCLUDE_DIRECTORIES ${LIBMAD_INCLUDE_DIR}
      IMPORTED_LOCATION ${LIBMAD_LIBRARY}
  )
 endif()
@@ -61,6 +61,8 @@ target_link_libraries(${DUSK_LIBRARY_TARGET_NAME} PRIVATE
  zstd
  z
  lzma
  asnd
  mad
 )
 if(DUSK_DOLPHIN_BUILD_TYPE STREQUAL "ISO")
@@ -30,6 +30,7 @@ target_link_libraries(${DUSK_BINARY_TARGET_NAME} PUBLIC
  pspgu
  pspaudio
  pspaudiolib
  pspmp3
  psputility
  pspvfpu
  pspvram
@@ -59,12 +60,42 @@ target_compile_definitions(${DUSK_BINARY_TARGET_NAME} PUBLIC
  DUSK_DISPLAY_OVERSCAN=6
 )
 # logDebug()/logError() additionally write every call to a file on the
 # Memory Stick (ms0:/PSP/GAME/Dusk/*.log) - a real, measured source of
 # per-call hitching (fopen+write+fclose every log line), not just a
 # theoretical cost. Default off so a normal build doesn't pay it; opt in
 # with -DDUSK_PSP_LOG_FILE=ON when the log file itself is actually needed
 # (e.g. no way to see stdout on real hardware).
 set(DUSK_PSP_LOG_FILE OFF CACHE BOOL "Also write PSP debug/error logs to ms0:/PSP/GAME/Dusk/*.log (slow - Memory Stick I/O per call).")
 if(DUSK_PSP_LOG_FILE)
  target_compile_definitions(${DUSK_BINARY_TARGET_NAME} PUBLIC
    DUSK_PSP_LOG_FILE
  )
 endif()
 if(NOT CMAKE_BUILD_TYPE STREQUAL "Debug")
  target_compile_definitions(${DUSK_BINARY_TARGET_NAME} PUBLIC
    DUSK_ASSERTIONS_FAKED
  )
 endif()
 # Generate PARAM.SFO as a normal tracked build output (instead of letting
 # create_pbp_file() auto-generate + delete it) so it can be reused below by
 # a properly dependency-tracked EBOOT.PBP repack step.
 set(DUSK_PSP_PARAM_SFO "${DUSK_BUILD_DIR}/PARAM.SFO")
 add_custom_command(
  OUTPUT "${DUSK_PSP_PARAM_SFO}"
  COMMAND "$ENV{PSPDEV}/bin/mksfoex" "-d" "MEMSIZE=1" "-s" "APP_VER=01.00"
          "${DUSK_BINARY_TARGET_NAME}" "${DUSK_PSP_PARAM_SFO}"
  COMMENT "Generating PARAM.SFO for ${DUSK_BINARY_TARGET_NAME}"
  VERBATIM
 )
 add_custom_target(DuskPspParamSfo DEPENDS "${DUSK_PSP_PARAM_SFO}")
 # create_pbp_file()'s own POST_BUILD chain (below) also consumes
 # DUSK_PSP_PARAM_SFO, so make sure it exists before that chain runs.
 add_dependencies(${DUSK_BINARY_TARGET_NAME} DuskPspParamSfo)
 # Postbuild, create .pbp file for PSP.
 create_pbp_file(
  TARGET "${DUSK_BINARY_TARGET_NAME}"
@@ -74,4 +105,33 @@ create_pbp_file(
  TITLE "${DUSK_BINARY_TARGET_NAME}"
  PSAR_PATH ${DUSK_ASSETS_ZIP}
  VERSION 01.00
  SFO_PATH "${DUSK_PSP_PARAM_SFO}"
  OUTPUT_DIR "${DUSK_BUILD_DIR}"
 )
 # CreatePBP.cmake's pack-pbp step is a POST_BUILD command tied to the
 # executable target, so it only reruns when the ELF itself relinks. That
 # means regenerating dusk.dsk (assets) alone, without touching any C
 # source, silently leaves EBOOT.PBP embedding a stale asset pak. Repack it
 # here as a normal file-tracked custom command depending on both the
 # executable and the asset zip, so EBOOT.PBP always reflects the current
 # assets even when nothing else about the build changed.
 set(DUSK_PSP_EBOOT "${DUSK_BUILD_DIR}/EBOOT.PBP")
 if(BUILD_PRX)
  set(DUSK_PSP_EXECUTABLE "$<TARGET_FILE:${DUSK_BINARY_TARGET_NAME}>.prx")
 else()
  set(DUSK_PSP_EXECUTABLE "$<TARGET_FILE:${DUSK_BINARY_TARGET_NAME}>")
 endif()
 add_custom_command(
  OUTPUT "${DUSK_PSP_EBOOT}"
  COMMAND "$ENV{PSPDEV}/bin/pack-pbp" "${DUSK_PSP_EBOOT}" "${DUSK_PSP_PARAM_SFO}"
          "NULL" "NULL" "NULL" "NULL" "NULL"
          "${DUSK_PSP_EXECUTABLE}" "${DUSK_ASSETS_ZIP}"
  DEPENDS
    "$<TARGET_FILE:${DUSK_BINARY_TARGET_NAME}>"
    "${DUSK_PSP_PARAM_SFO}"
    "${DUSK_ASSETS_ZIP}"
  COMMENT "Repacking EBOOT.PBP (tracks executable + asset pak freshness)"
  VERBATIM
 )
 add_custom_target(DuskPspEbootRepack ALL DEPENDS "${DUSK_PSP_EBOOT}")
@@ -4,6 +4,17 @@ target_compile_definitions(${DUSK_LIBRARY_TARGET_NAME} PUBLIC
  DUSK_WII
 )
 # Wii save storage method - see src/duskdolphin/save/savedeviceplatform.h.
 set(DUSK_SAVE_WII_METHOD "SD" CACHE STRING
  "Wii save storage: NAND (internal storage via ISFS), CARD (GameCube-\
 compatible memory card emulation), or SD (SD card via libfat)"
 )
 set_property(CACHE DUSK_SAVE_WII_METHOD PROPERTY STRINGS "NAND" "CARD" "SD")
 target_compile_definitions(${DUSK_LIBRARY_TARGET_NAME} PUBLIC
  DUSK_SAVE_WII_METHOD_${DUSK_SAVE_WII_METHOD}
 )
 # Generate Homebrew Channel meta.xml from project identity variables
 string(TIMESTAMP DUSK_BUILD_DATE "%Y%m%d000000" UTC)
 configure_file(
@@ -345,12 +345,14 @@
    return promise;
  }
  const MAP_NAME = "overworld";
  function chunkPaths(x, y, z) {
    return {
-      raw: `assetsraw/chunks/chunk_${x}_${y}_${z}.json`,
+      raw: `assetsraw/maps/${MAP_NAME}/chunks/chunk_${x}_${y}_${z}.json`,
-      dcf: `assets/chunks/${x}_${y}_${z}.dcf`,
+      dcf: `assets/maps/${MAP_NAME}/chunks/${x}_${y}_${z}.dcf`,
-      terrainDmf: `assets/meshes/chunks/chunk_${x}_${y}_${z}_0.dmf`,
+      terrainDmf: `assets/maps/${MAP_NAME}/meshes/chunks/chunk_${x}_${y}_${z}_0.dmf`,
-      terrainModel: `assets/models/chunks/chunk_${x}_${y}_${z}_0.json`,
+      terrainModel: `assets/maps/${MAP_NAME}/models/chunks/chunk_${x}_${y}_${z}_0.json`,
    };
  }
@@ -767,7 +769,7 @@
  async function buildChunkBrowseList() {
    const list = document.getElementById("chunkBrowseList");
    list.innerHTML = "";
-    const res = await apiLs("assetsraw/chunks");
+    const res = await apiLs(`assetsraw/maps/${MAP_NAME}/chunks`);
    for(const entry of res.entries || []) {
      const m = entry.name.match(/^chunk_(-?\d+)_(-?\d+)_(-?\d+)\.json$/);
      if(!m) continue;
@@ -209,7 +209,10 @@ class Handler(BaseHTTPRequestHandler):
            self.send_json({"error": "invalid chunk coordinates"}, 400)
            return
-        json_path = PROJECT_ROOT / "assetsraw" / "chunks" / f"chunk_{x}_{y}_{z}.json"
+        json_path = (
            PROJECT_ROOT / "assetsraw" / "maps" / "overworld" / "chunks"
            / f"chunk_{x}_{y}_{z}.json"
        )
        if not json_path.is_file():
            self.send_json({"error": "chunk json not found"}, 404)
            return
@@ -5,10 +5,15 @@
 add_subdirectory(dusk)
 if(DUSK_NETWORK)
  add_subdirectory(dusknetwork)
 endif()
 if(DUSK_TARGET_SYSTEM STREQUAL "linux" OR DUSK_TARGET_SYSTEM STREQUAL "knulli")
  add_subdirectory(dusklinux)
  add_subdirectory(dusksdl2)
  add_subdirectory(duskgl)
  add_subdirectory(duskmad)
 elseif(DUSK_TARGET_SYSTEM STREQUAL "psp")
  add_subdirectory(duskpsp)
@@ -20,7 +25,11 @@ elseif(DUSK_TARGET_SYSTEM STREQUAL "vita")
  add_subdirectory(dusksdl2)
  add_subdirectory(duskgl)
-elseif(DUSK_TARGET_SYSTEM STREQUAL "wii" OR DUSK_TARGET_SYSTEM STREQUAL "gamecube")
+elseif(
  DUSK_TARGET_SYSTEM STREQUAL "wii" OR
  DUSK_TARGET_SYSTEM STREQUAL "gamecube"
 )
  add_subdirectory(duskdolphin)
  add_subdirectory(duskmad)
 endif()
@@ -14,12 +14,21 @@ if(NOT libzip_FOUND)
  target_link_libraries(${DUSK_LIBRARY_TARGET_NAME} PUBLIC zip)
 endif()
 # assetdsk.c calls crc32() directly (to verify dusk.dsk archive checksums).
 # find_package(libzip) above already resolves ZLIB as a side effect, so
 # ZLIB_FOUND may already be true without ZLIB::ZLIB having been linked to
 # our target - link it unconditionally rather than guarding on ZLIB_FOUND.
 find_package(ZLIB REQUIRED)
 target_link_libraries(${DUSK_LIBRARY_TARGET_NAME} PUBLIC ZLIB::ZLIB)
 if(NOT stb_image_FOUND)
  find_package(stb REQUIRED)
  if(STB_IMAGE_FOUND)
    target_link_libraries(${DUSK_LIBRARY_TARGET_NAME} PUBLIC stb_image)
  else()
-    message(FATAL_ERROR "stb_image not found. Please ensure stb is correctly fetched.")
+    message(FATAL_ERROR
      "stb_image not found. Please ensure stb is correctly fetched."
    )
  endif()
 endif()
@@ -28,7 +37,9 @@ if(NOT yyjson_FOUND)
  if(yyjson_FOUND)
    target_link_libraries(${DUSK_LIBRARY_TARGET_NAME} PUBLIC yyjson::yyjson)
  else()
-    message(FATAL_ERROR "yyjson not found. Please ensure yyjson is correctly fetched.")
+    message(FATAL_ERROR
      "yyjson not found. Please ensure yyjson is correctly fetched."
    )
  endif()
 endif()
@@ -53,9 +64,9 @@ target_sources(${DUSK_BINARY_TARGET_NAME}
 # Subdirs
 add_subdirectory(animation)
 add_subdirectory(event)
 add_subdirectory(assert)
 add_subdirectory(asset)
 add_subdirectory(audio)
 add_subdirectory(console)
 add_subdirectory(display)
 add_subdirectory(log)
@@ -63,12 +74,12 @@ add_subdirectory(engine)
 add_subdirectory(error)
 add_subdirectory(input)
 add_subdirectory(locale)
 add_subdirectory(perf)
 add_subdirectory(rpg)
 add_subdirectory(scene)
 add_subdirectory(system)
 add_subdirectory(time)
 add_subdirectory(ui)
 add_subdirectory(network)
 add_subdirectory(save)
 add_subdirectory(util)
 add_subdirectory(thread)
@@ -7,4 +7,5 @@ target_sources(${DUSK_LIBRARY_TARGET_NAME}
  PUBLIC
    easing.c
    animation.c
    keyframe.c
 )
@@ -11,42 +11,122 @@
 void animationInit(
  animation_t *anim,
  keyframe_t *keyframes,
-  uint16_t keyframeCount
+  uint16_t *keyframeCounts,
  const uint16_t layerCount
 ) {
  assertNotNull(anim, "Animation pointer cannot be null.");
  assertNotNull(keyframes, "Keyframes pointer cannot be null.");
-  assertTrue(keyframeCount > 0, "Keyframe count must be more than 0.");
+  assertNotNull(keyframeCounts, "Keyframe counts pointer cannot be null.");
  assertTrue(layerCount > 0, "Layer count must be greater than zero.");
  memoryZero(anim, sizeof(animation_t));
  anim->keyframes = keyframes;
-  anim->keyframeCount = keyframeCount;
+  anim->keyframeCounts = keyframeCounts;
  anim->layerCount = layerCount;
  // Determine duration
  float_t duration = 0.0f;
  for(uint16_t layer = 0; layer < layerCount; layer++) {
    uint16_t keyframeCount = keyframeCounts[layer];
    assertTrue(keyframeCount > 0, "Keyframe count invalid.");
    keyframe_t *layerKeyframes = keyframes + layer * keyframeCount;
    #ifdef DUSK_ASSERTIONS
      // Check that the keyframes are sorted by time.
      for(uint16_t i = 1; i < keyframeCount; i++) {
        assertTrue(
          layerKeyframes[i].time >= layerKeyframes[i - 1].time,
          "Keyframes must be sorted by time."
        );
      }
    #endif
    keyframe_t *lastKeyframe = layerKeyframes + keyframeCount - 1;
    duration = mathMax(duration, lastKeyframe->time);
  }
  assertTrue(duration > 0, "Animation duration must be greater than 0.");
  anim->duration = duration;
 }
-float_t animationGetValue(animation_t *anim, const float_t time) {
+float_t animationGetLayerValue(const animation_t *anim, const uint16_t layer) {
  assertNotNull(anim, "Animation pointer cannot be null.");
-  assertNotNull(anim->keyframes, "Keyframes pointer cannot be null.");
+  assertTrue(layer < anim->layerCount, "Layer index out of bounds.");
  assertTrue(anim->keyframeCount > 0, "Keyframe count invalid.");
  assertTrue(time >= 0, "Time must be non-negative.");
-  keyframe_t *start;
+  uint16_t keyframeCount = anim->keyframeCounts[layer];
-  keyframe_t *end;
+  keyframe_t *layerKeyframes = anim->keyframes + layer * keyframeCount;
-  keyframe_t *last = anim->keyframes + anim->keyframeCount - 1;
+  return keyframeGetValue(layerKeyframes, keyframeCount, anim->time);
-  keyframe_t *current = anim->keyframes;
+}
  start = current;
-  do {
+void animationUpdate(
-    if(current->time > time) {
+  animation_t *anim,
-      end = current;
+  const float_t deltaTime
 ) {
  assertNotNull(anim, "Animation pointer cannot be null.");
  assertTrue(deltaTime >= 0, "Delta time must be non-negative.");
  bool_t justCompleted = false;
  if(!(anim->flags & ANIMATION_FLAG_INTERNAL_COMPLETED)) {
    bool_t loop = (anim->flags & ANIMATION_FLAG_LOOP) != 0;
    bool_t pingpong = (anim->flags & ANIMATION_FLAG_PINGPONG) != 0;
    assertFalse(
      loop && pingpong,
      "Cannot set both ANIMATION_FLAG_LOOP and ANIMATION_FLAG_PINGPONG."
    );
    bool_t backward;
    if(pingpong) {
      backward = (anim->flags & ANIMATION_FLAG_INTERNAL_PINGPONG_BACKWARD) != 0;
    } else {
      backward = (anim->flags & ANIMATION_FLAG_REVERSE) != 0;
    }
    // Resolve boundary crossings one at a time, so a single large deltaTime
    // can correctly loop/pingpong across multiple boundaries in one call.
    float_t remaining = deltaTime;
    while(remaining > 0.0f) {
      float_t toBoundary = (
        backward ? anim->time : (anim->duration - anim->time)
      );
      if(remaining < toBoundary) {
        anim->time += backward ? -remaining : remaining;
        break;
      }
    start = current;
    current++;
-    if(current > last) {
+      remaining -= toBoundary;
-      end = start;
+      anim->time = backward ? 0.0f : anim->duration;
      bool_t stopHere;
      if(backward) {
        stopHere = (anim->flags & ANIMATION_FLAG_STOP_BEGINNING) != 0;
      } else {
        stopHere = (anim->flags & ANIMATION_FLAG_STOP_END) != 0;
      }
      if(stopHere) {
        justCompleted = true;
        break;
      } else if(pingpong) {
        backward = !backward;
        if(backward) anim->flags |= ANIMATION_FLAG_INTERNAL_PINGPONG_BACKWARD;
        else anim->flags &= ~ANIMATION_FLAG_INTERNAL_PINGPONG_BACKWARD;
      } else if(loop) {
        anim->time = backward ? anim->duration : 0.0f;
        if(anim->onLoop) anim->onLoop(anim->user);
      } else {
        justCompleted = true;
        break;
      }
-  } while(true);
+    }
-  float_t t = (time - start->time) / (end->time - start->time);
+    if(justCompleted) anim->flags |= ANIMATION_FLAG_INTERNAL_COMPLETED;
-  return mathLerp(start->value, end->value, easingApply(start->easing, t));
+  }
  // Call onUpdate for each layer.
  for(uint16_t layer = 0; layer < anim->layerCount; layer++) {
    float_t value = animationGetLayerValue(anim, layer);
    if(anim->onUpdate) anim->onUpdate(layer, value, anim->user);
  }
  if(justCompleted && anim->onComplete) anim->onComplete(anim->user);
 }
@@ -6,29 +6,89 @@
 #pragma once
 #include "keyframe.h"
 #define ANIMATION_FLAG_LOOP (1 << 0)
 #define ANIMATION_FLAG_REVERSE (1 << 1)
 #define ANIMATION_FLAG_PINGPONG (1 << 2)
 #define ANIMATION_FLAG_STOP_BEGINNING (1 << 3)
 #define ANIMATION_FLAG_STOP_END (1 << 4)
 // Internal - tracks which direction a pingponging animation is currently
 // travelling. Do not set this manually, it is managed by animationUpdate().
 #define ANIMATION_FLAG_INTERNAL_PINGPONG_BACKWARD (1 << 7)
 // Internal - set once the animation has stopped advancing (see
 // animationUpdate()). Do not set this manually. There is currently no way to
 // restart a completed animation short of clearing this bit and resetting
 // anim->time by hand.
 #define ANIMATION_FLAG_INTERNAL_COMPLETED (1 << 6)
 typedef struct {
  keyframe_t *keyframes;
-  uint16_t keyframeCount;
+  uint16_t *keyframeCounts;
  uint16_t layerCount;
  float_t time;
  float_t duration;
  uint8_t flags;
  void *user;
  void (*onUpdate)(const uint16_t layer, const float_t value, void *user);
  void (*onComplete)(void *user);
  void (*onLoop)(void *user);
 } animation_t;
 /**
- * Initializes an animation.
+ * Initializes an animation with the given keyframes and layer count.
 *
- * @param anim The animation to initialize.
+ * @param anim Pointer to the animation to initialize.
- * @param keyframes The keyframes to use for the animation.
+ * @param keyframes Pointer to the array of keyframes for each layer.
- * @param keyframeCount The number of keyframes in the animation.
+ * @param keyframeCount Number of keyframes in each layer.
 * @param layerCount Number of layers in the animation.
 */
 void animationInit(
  animation_t *anim,
  keyframe_t *keyframes,
-  uint16_t keyframeCount
+  uint16_t *keyframeCounts,
  const uint16_t layerCount
 );
 /**
- * Gets the value of the animation at a given time.
+ * Sets the current time of the animation, clamping it to the valid range.
 * This will call the onUpdate callback but none of the other callbacks.
 * 
- * @param anim The animation to get the value from.
+ * @param anim Pointer to the animation to set the time for.
- * @param time The time at which to get the value, in seconds.
+ * @param time The new time to set for the animation.
 * @return The value of the animation at the given time.
 */
-float_t animationGetValue(animation_t *anim, const float_t time);
+void animationSetTime(animation_t *anim, const float_t time);
 /**
 * Gets the current value of a specific layer in the animation based on the
 * current animation time.
 */
 float_t animationGetLayerValue(const animation_t *anim, const uint16_t layer);
 /**
 * Updates the animation state based on the elapsed time. Advances anim->time
 * by deltaTime (or against it, if ANIMATION_FLAG_REVERSE is set), then
 * resolves whatever happens when it reaches the 0 or duration boundary:
 *
 * - ANIMATION_FLAG_PINGPONG: reflects off the boundary and continues playing
 *   in the opposite direction, forever, unless stopped (see below).
 * - ANIMATION_FLAG_LOOP: wraps back around to the other boundary and keeps
 *   playing in the same direction, forever, unless stopped (see below).
 * - ANIMATION_FLAG_STOP_BEGINNING / ANIMATION_FLAG_STOP_END: when the
 *   animation reaches that specific boundary, it clamps there and stops
 *   (firing onComplete) instead of looping/pingponging past it.
 * - If none of the above apply at a boundary, the animation clamps there and
 *   stops, firing onComplete.
 *
 * onUpdate is called for every layer on every call. onLoop is called each
 * time a loop wraps around. onComplete is called at most once, the moment
 * the animation stops advancing.
 *
 * @param anim Pointer to the animation to update.
 * @param deltaTime Time elapsed since the last update (in seconds).
 */
 void animationUpdate(
  animation_t *anim,
  const float_t deltaTime
 );
@@ -0,0 +1,45 @@
 /**
 * Copyright (c) 2026 Dominic Masters
 * 
 * This software is released under the MIT License.
 * https://opensource.org/licenses/MIT
 */
 #include "keyframe.h"
 #include "assert/assert.h"
 #include "util/math.h"
 float_t keyframeGetValue(
  const keyframe_t *keyframes,
  const uint32_t keyframeCount,
  const float_t time
 ) {
  assertNotNull(keyframes, "Keyframes pointer cannot be null.");
  assertTrue(keyframeCount > 0, "Keyframe count must be more than 0.");
  assertTrue(time >= 0, "Time must be non-negative.");
  #ifdef DUSK_ASSERTIONS
    // Checks that the keyframes are sorted by time.
    for(uint32_t i = 1; i < keyframeCount; i++) {
      assertTrue(
        keyframes[i].time >= keyframes[i - 1].time,
        "Keyframes must be sorted by time."
      );
    }
  #endif
  keyframe_t *last = (keyframe_t *)(keyframes + keyframeCount - 1);
  if(time >= last->time) return last->value;
  // Since time < last->time (checked above), current is guaranteed to stop
  // at or before reaching last, so no separate end-of-array check is needed.
  keyframe_t *current = (keyframe_t *)keyframes;
  keyframe_t *start = current;
  while(current->time <= time) {
    start = current;
    current++;
  }
  keyframe_t *end = current;
  float_t t = (time - start->time) / (end->time - start->time);
  return mathLerp(start->value, end->value, easingApply(start->easing, t));
 }
@@ -11,3 +11,17 @@ typedef struct {
  float_t value;
  easingtype_t easing;
 } keyframe_t;
 /**
 * Gets the value of a keyframe at a given time.
 * 
 * @param keyframes The keyframes to get the value from.
 * @param keyframeCount The number of keyframes in the array.
 * @param time The time at which to get the value, in seconds.
 * @return The value of the keyframe at the given time.
 */
 float_t keyframeGetValue(
  const keyframe_t *keyframes,
  const uint32_t keyframeCount,
  const float_t time
 );
@@ -22,6 +22,8 @@
 #endif
 #ifndef DUSK_ASSERTIONS_FAKED
  #define DUSK_ASSERTIONS 1
  /**
   * Initializes the assert system. Must be the very first call in engine
   * startup.
@@ -7,7 +7,7 @@
 target_sources(${DUSK_LIBRARY_TARGET_NAME}
  PUBLIC
    asset.c
-    assetbatch.c
+    assetdsk.c
    assetfile.c
 )
@@ -19,6 +19,8 @@ asset_t ASSET;
 errorret_t assetInit(void) {
  memoryZero(&ASSET, sizeof(asset_t));
  threadMutexInit(&ASSET.zipLock);
  for(size_t i = 0; i < ASSET_LOADING_COUNT_MAX; i++) {
    threadMutexInit(&ASSET.loading[i].mutex);
  }
@@ -35,9 +37,10 @@ errorret_t assetInit(void) {
 bool_t assetFileExists(const char_t *filename) {
  assertStrLenMax(filename, ASSET_FILE_NAME_MAX, "Filename too long.");
-  zip_int64_t idx = zip_name_locate(ASSET.zip, filename, 0);
+  threadMutexLock(&ASSET.zipLock);
-  if(idx < 0) return false;
+  bool_t found = zip_name_locate(ASSET.zip, filename, 0) >= 0;
-  return true;
+  threadMutexUnlock(&ASSET.zipLock);
  return found;
 }
 assetentry_t * assetGetEntry(
@@ -117,6 +120,15 @@ errorret_t assetRequireLoaded(assetentry_t *entry) {
  assetEntryLock(entry);
  while(entry->state != ASSET_ENTRY_STATE_LOADED) {
    // A failed load transitions to ERROR, not LOADED - without this check
    // this loop spins forever on any load failure (assetUpdate() itself
    // still returns OK, since a single asset failing isn't meant to halt
    // the whole update loop - see its ASSET_ENTRY_STATE_ERROR handling).
    if(entry->state == ASSET_ENTRY_STATE_ERROR) {
      assetEntryUnlock(entry);
      errorThrow("Failed to load asset: %s", entry->name);
    }
    usleep(1000);
    errorret_t ret = assetUpdate();
    if(errorIsNotOk(ret)) {
@@ -322,7 +334,9 @@ errorret_t assetUpdate(void) {
        } else if(loading->entry->state == ASSET_ENTRY_STATE_LOADED) {
          assetentry_t *loadedEntry = loading->entry;
          loading->entry = NULL;
-          eventInvoke(&loadedEntry->onLoaded, loadedEntry);
+          if(loadedEntry->onLoaded) {
            loadedEntry->onLoaded(loadedEntry, loadedEntry->onLoadedUser);
          }
        }
        loading++;
@@ -346,8 +360,10 @@ errorret_t assetUpdate(void) {
        assetentry_t *errEntry = loading->entry;
        loading->entry = NULL;
        threadMutexUnlock(&loading->mutex);
-        eventInvoke(&errEntry->onError, errEntry);
+        if(errEntry->onError) {
-        errorThrow("Failed to load asset asynchronously.");
+          errEntry->onError(errEntry, errEntry->onErrorUser);
        }
        loading++;
        break;
      }
@@ -434,5 +450,6 @@ errorret_t assetDispose(void) {
  }
  errorChain(assetDisposePlatform());
  threadMutexDispose(&ASSET.zipLock);
  errorOk();
 }
@@ -26,10 +26,40 @@
 #define ASSET_LOADING_COUNT_MAX 10
 #define ASSET_ENTRY_COUNT_MAX 64
 #define ASSET_BASE_DIRECTORY_MAX 256
 typedef struct asset_s {
  // The dusk.dsk archive - a single uncompressed (ZIP_STORED) zip, so
  // every entry gets the reliable repeated seeking/re-opening that
  // libzip only supports reliably for uncompressed entries (locale
  // strings, MP3 loop restarts, etc.).
  zip_t *zip;
  // Directory dusk.dsk was actually found/opened in (on PSP, the directory
  // EBOOT.PBP lives in, since dusk.dsk is embedded inside it rather than a
  // loose file) - populated by each platform's own assetInitXxx() once it
  // locates the file. Save devices that persist to a real filesystem path
  // (Linux, PSP, Wii SD) use this as their base directory instead of a
  // separate hardcoded location, so saves live next to wherever the game
  // itself was actually launched from rather than some unrelated fixed
  // path. Not meaningful for devices with no filesystem-path concept at
  // all (GameCube/Wii memory card, Wii NAND's ISFS namespace).
  char_t baseDirectory[ASSET_BASE_DIRECTORY_MAX];
  assetplatform_t platform;
  // Guards every libzip call against ASSET.zip (zip_fopen,
  // zip_fread, zip_fclose, zip_fseek, zip_stat, zip_name_locate - see
  // assetfile.c/assetFileExists). libzip is documented as not thread-safe,
  // and this asset system genuinely calls it from multiple real threads at
  // once (main thread, the background load thread below, and - on
  // platforms that stream PCM from an asset on their own thread, like PSP
  // - an audio feeder thread too). Confirmed necessary on real PSP
  // hardware: without this lock, concurrent zip_fopen/zip_fread calls from
  // different threads corrupted reads (EINVAL, then zlib data errors) once
  // dusk.dsk stopped being read entirely into memory up front.
  threadmutex_t zipLock;
  // Background loading thread.
  thread_t loadThread;
@@ -1,165 +0,0 @@
 /**
 * Copyright (c) 2026 Dominic Masters
 *
 * This software is released under the MIT License.
 * https://opensource.org/licenses/MIT
 */
 #include "assetbatch.h"
 #include "asset.h"
 #include "assert/assert.h"
 #include "util/memory.h"
 #include <unistd.h>
 void assetBatchInit(
  assetbatch_t *batch,
  const uint16_t count,
  const assetbatchdesc_t *descs
 ) {
  assertNotNull(batch, "Batch cannot be NULL.");
  assertNotNull(descs, "Descs cannot be NULL.");
  assertTrue(count > 0, "Count must be greater than 0.");
  assertTrue(
    count <= ASSET_BATCH_COUNT_MAX, "Count exceeds ASSET_BATCH_COUNT_MAX."
  );
  memoryZero(batch, sizeof(assetbatch_t));
  batch->count = count;
  eventInit(
    &batch->onLoaded,
    batch->onLoadedCallbacks, batch->onLoadedUsers, ASSET_BATCH_EVENT_MAX
  );
  eventInit(
    &batch->onEntryLoaded,
    batch->onEntryLoadedCallbacks,
    batch->onEntryLoadedUsers,
    ASSET_BATCH_EVENT_MAX
  );
  eventInit(
    &batch->onError,
    batch->onErrorCallbacks, batch->onErrorUsers, ASSET_BATCH_EVENT_MAX
  );
  eventInit(
    &batch->onEntryError,
    batch->onEntryErrorCallbacks,
    batch->onEntryErrorUsers,
    ASSET_BATCH_EVENT_MAX
  );
  for(uint16_t i = 0; i < count; i++) {
    batch->inputs[i] = descs[i].input;
    batch->entries[i] = assetLock(
      descs[i].path, descs[i].type, &batch->inputs[i]
    );
    if(batch->entries[i]->state == ASSET_ENTRY_STATE_LOADED) {
      // Already loaded (cached) - count it now, no subscription needed.
      batch->loadedCount++;
    } else if(batch->entries[i]->state == ASSET_ENTRY_STATE_ERROR) {
      batch->errorCount++;
    } else {
      eventSubscribe(
        &batch->entries[i]->onLoaded, assetBatchEntryOnLoadedCb, batch
      );
      eventSubscribe(
        &batch->entries[i]->onError, assetBatchEntryOnErrorCb, batch
      );
    }
  }
 }
 void assetBatchLock(assetbatch_t *batch) {
  assertNotNull(batch, "Batch cannot be NULL.");
  for(uint16_t i = 0; i < batch->count; i++) {
    assetEntryLock(batch->entries[i]);
  }
 }
 void assetBatchUnlock(assetbatch_t *batch) {
  assertNotNull(batch, "Batch cannot be NULL.");
  for(uint16_t i = 0; i < batch->count; i++) {
    assetEntryUnlock(batch->entries[i]);
  }
 }
 bool_t assetBatchIsLoaded(const assetbatch_t *batch) {
  assertNotNull(batch, "Batch cannot be NULL.");
  for(uint16_t i = 0; i < batch->count; i++) {
    if(batch->entries[i]->state != ASSET_ENTRY_STATE_LOADED) return false;
  }
  return true;
 }
 bool_t assetBatchHasError(const assetbatch_t *batch) {
  assertNotNull(batch, "Batch cannot be NULL.");
  for(uint16_t i = 0; i < batch->count; i++) {
    if(batch->entries[i]->state == ASSET_ENTRY_STATE_ERROR) return true;
  }
  return false;
 }
 errorret_t assetBatchRequireLoaded(assetbatch_t *batch) {
  assertNotNull(batch, "Batch cannot be NULL.");
  bool_t allDone;
  do {
    allDone = true;
    for(uint16_t i = 0; i < batch->count; i++) {
      const assetentrystate_t state = batch->entries[i]->state;
      if(state == ASSET_ENTRY_STATE_ERROR) {
        errorThrow("Asset '%s' failed to load.", batch->entries[i]->name);
      }
      if(state != ASSET_ENTRY_STATE_LOADED) {
        allDone = false;
      }
    }
    if(!allDone) {
      usleep(1000);
      errorChain(assetUpdate());
    }
  } while(!allDone);
  errorOk();
 }
 void assetBatchDispose(assetbatch_t *batch) {
  assertNotNull(batch, "Batch cannot be NULL.");
  for(uint16_t i = 0; i < batch->count; i++) {
    if(batch->entries[i]) {
      // Unsubscribe while we still hold a lock so the entry is live.
      eventUnsubscribe(&batch->entries[i]->onLoaded, assetBatchEntryOnLoadedCb);
      eventUnsubscribe(&batch->entries[i]->onError, assetBatchEntryOnErrorCb);
      assetUnlockEntry(batch->entries[i]);
    }
  }
  memoryZero(batch, sizeof(assetbatch_t));
 }
 void assetBatchEntryOnLoadedCb(void *params, void *user) {
  assetentry_t *entry = (assetentry_t *)params;
  assetbatch_t *batch = (assetbatch_t *)user;
  batch->loadedCount++;
  eventInvoke(&batch->onEntryLoaded, entry);
  if((uint16_t)(batch->loadedCount + batch->errorCount) >= batch->count) {
    if(batch->errorCount == 0) {
      eventInvoke(&batch->onLoaded, batch);
    } else {
      eventInvoke(&batch->onError, batch);
    }
  }
 }
 void assetBatchEntryOnErrorCb(void *params, void *user) {
  assetentry_t *entry = (assetentry_t *)params;
  assetbatch_t *batch = (assetbatch_t *)user;
  batch->errorCount++;
  eventInvoke(&batch->onEntryError, entry);
  if((uint16_t)(batch->loadedCount + batch->errorCount) >= batch->count) {
    eventInvoke(&batch->onError, batch);
  }
 }
@@ -1,124 +0,0 @@
 /**
 * Copyright (c) 2026 Dominic Masters
 *
 * This software is released under the MIT License.
 * https://opensource.org/licenses/MIT
 */
 #pragma once
 #include "asset/loader/assetentry.h"
 #include "asset/loader/assetloader.h"
 #include "event/event.h"
 #define ASSET_BATCH_COUNT_MAX  64
 #define ASSET_BATCH_EVENT_MAX  4
 typedef struct {
  const char_t *path;
  assetloadertype_t type;
  assetloaderinput_t input;
 } assetbatchdesc_t;
 typedef struct {
  assetentry_t *entries[ASSET_BATCH_COUNT_MAX];
  assetloaderinput_t inputs[ASSET_BATCH_COUNT_MAX];
  uint16_t count;
  uint16_t loadedCount;
  uint16_t errorCount;
  /** Fires once when every entry loaded. params = assetbatch_t * */
  event_t onLoaded;
  eventcallback_t onLoadedCallbacks[ASSET_BATCH_EVENT_MAX];
  void *onLoadedUsers[ASSET_BATCH_EVENT_MAX];
  /** Fires each time a single entry loads. params = assetentry_t * */
  event_t onEntryLoaded;
  eventcallback_t onEntryLoadedCallbacks[ASSET_BATCH_EVENT_MAX];
  void *onEntryLoadedUsers[ASSET_BATCH_EVENT_MAX];
  /** Fires when all entries finish (any with errors). params: assetbatch_t * */
  event_t onError;
  eventcallback_t onErrorCallbacks[ASSET_BATCH_EVENT_MAX];
  void *onErrorUsers[ASSET_BATCH_EVENT_MAX];
  /** Fires each time a single entry errors. params = assetentry_t * */
  event_t onEntryError;
  eventcallback_t onEntryErrorCallbacks[ASSET_BATCH_EVENT_MAX];
  void *onEntryErrorUsers[ASSET_BATCH_EVENT_MAX];
 } assetbatch_t;
 /**
 * Initialises the batch from an array of descriptors. Each entry is locked
 * and queued for loading immediately.
 *
 * @param batch  Batch to initialise.
 * @param descs  Array of entry descriptors (need not outlive this call).
 * @param count  Number of descriptors (must be <= ASSET_BATCH_COUNT_MAX).
 */
 void assetBatchInit(
  assetbatch_t *batch,
  uint16_t count,
  const assetbatchdesc_t *descs
 );
 /**
 * Acquires one additional lock on every entry in the batch.
 *
 * @param batch Batch to lock.
 */
 void assetBatchLock(assetbatch_t *batch);
 /**
 * Releases one lock from every entry in the batch. When an entry's lock
 * count reaches zero it will be reaped on the next assetUpdate.
 *
 * @param batch Batch to unlock.
 */
 void assetBatchUnlock(assetbatch_t *batch);
 /**
 * Returns true if every entry in the batch has finished loading.
 *
 * @param batch Batch to query.
 */
 bool_t assetBatchIsLoaded(const assetbatch_t *batch);
 /**
 * Returns true if any entry in the batch is in an error state.
 *
 * @param batch Batch to query.
 */
 bool_t assetBatchHasError(const assetbatch_t *batch);
 /**
 * Blocks until every entry is loaded. Returns an error if any entry fails.
 *
 * @param batch Batch to wait on.
 */
 errorret_t assetBatchRequireLoaded(assetbatch_t *batch);
 /**
 * Releases the batch's lock on every entry and clears the batch. After this
 * call the batch struct may be reused with assetBatchInit.
 *
 * @param batch Batch to dispose.
 */
 void assetBatchDispose(assetbatch_t *batch);
 /**
 * Event trampoline invoked when a batch entry finishes loading.
 * Increments the loaded counter and fires batch-level events.
 *
 * @param params The loaded assetentry_t pointer.
 * @param user   The owning assetbatch_t pointer.
 */
 void assetBatchEntryOnLoadedCb(void *params, void *user);
 /**
 * Event trampoline invoked when a batch entry fails to load.
 * Increments the error counter and fires batch-level events.
 *
 * @param params The errored assetentry_t pointer.
 * @param user   The owning assetbatch_t pointer.
 */
 void assetBatchEntryOnErrorCb(void *params, void *user);
@@ -0,0 +1,165 @@
 /**
 * Copyright (c) 2026 Dominic Masters
 *
 * This software is released under the MIT License.
 * https://opensource.org/licenses/MIT
 */
 #include "assetdsk.h"
 #include "util/memory.h"
 #include "util/endian.h"
 #include "assert/assert.h"
 #include <zlib.h>
 errorret_t assetDskParseHeader(
  const uint8_t *bytes,
  const size_t bytesSize,
  assetdskheader_t *outHeader
 ) {
  assertNotNull(bytes, "Bytes cannot be NULL.");
  assertNotNull(outHeader, "Out header cannot be NULL.");
  if(bytesSize < ASSET_DSK_HEADER_SIZE) {
    errorThrow("dusk.dsk header is truncated.");
  }
  if(memoryCompare(bytes, ASSET_DSK_MAGIC, ASSET_DSK_MAGIC_SIZE) != 0) {
    errorThrow("dusk.dsk has an invalid magic header.");
  }
  // Every field is a little-endian uint32_t regardless of host - convert
  // to host order (a no-op on little-endian hosts, a real byteswap on
  // Dolphin's big-endian PowerPC).
  uint32_t fields[3];
  memoryCopy(fields, bytes + ASSET_DSK_MAGIC_SIZE, sizeof(fields));
  for(uint8_t i = 0; i < 3; i++) {
    fields[i] = endianLittleToHost32(fields[i]);
  }
  const uint32_t version = fields[0];
  if(version != ASSET_DSK_VERSION) {
    errorThrow("dusk.dsk has an unsupported version: %u", version);
  }
  outHeader->size = fields[1];
  outHeader->checksum = fields[2];
  errorOk();
 }
 errorret_t assetDskOpenFromPath(
  const char_t *path,
  zip_t **outZip
 ) {
  errorChain(assetDskOpenFromPathRange(path, 0, SIZE_MAX, outZip));
  errorOk();
 }
 errorret_t assetDskOpenFromPathRange(
  const char_t *path,
  const size_t baseOffset,
  const size_t baseSize,
  zip_t **outZip
 ) {
  assertNotNull(path, "Path cannot be NULL.");
  assertNotNull(outZip, "Out zip cannot be NULL.");
  *outZip = NULL;
  FILE *headerFile = fopen(path, "rb");
  if(headerFile == NULL) {
    errorThrow("Failed to open dusk.dsk: %s", path);
  }
  if(fseek(headerFile, (long) baseOffset, SEEK_SET) != 0) {
    fclose(headerFile);
    errorThrow("Failed to seek to dusk.dsk range in file: %s", path);
  }
  uint8_t headerBytes[ASSET_DSK_HEADER_SIZE];
  size_t headerRead = fread(headerBytes, 1, sizeof(headerBytes), headerFile);
  fclose(headerFile);
  if(headerRead != sizeof(headerBytes)) {
    errorThrow("Failed to read dusk.dsk header: %s", path);
  }
  assetdskheader_t header;
  errorChain(assetDskParseHeader(headerBytes, sizeof(headerBytes), &header));
  if((size_t) ASSET_DSK_HEADER_SIZE + header.size > baseSize) {
    errorThrow("dusk.dsk header describes a range beyond its containing file.");
  }
  zip_error_t zipError;
  zip_error_init(&zipError);
  zip_source_t *source = zip_source_file_create(
    path,
    (zip_uint64_t) (baseOffset + ASSET_DSK_HEADER_SIZE),
    (zip_int64_t) header.size,
    &zipError
  );
  if(source == NULL) {
    errorThrow(
      "Failed to create dusk.dsk source: %s", zip_error_strerror(&zipError)
    );
  }
  *outZip = zip_open_from_source(source, ZIP_RDONLY, &zipError);
  if(*outZip == NULL) {
    zip_source_free(source);
    errorThrow(
      "Failed to open dusk.dsk archive: %s", zip_error_strerror(&zipError)
    );
  }
  errorOk();
 }
 errorret_t assetDskOpenFromBuffer(
  uint8_t *buffer,
  const size_t bufferSize,
  zip_t **outZip
 ) {
  assertNotNull(buffer, "Buffer cannot be NULL.");
  assertNotNull(outZip, "Out zip cannot be NULL.");
  *outZip = NULL;
  assetdskheader_t header;
  errorChain(assetDskParseHeader(buffer, bufferSize, &header));
  if((size_t) ASSET_DSK_HEADER_SIZE + header.size > bufferSize) {
    errorThrow("dusk.dsk header describes a range beyond the buffer.");
  }
  uint8_t *data = buffer + ASSET_DSK_HEADER_SIZE;
  uint32_t checksum = (uint32_t) crc32(0L, data, (uInt) header.size);
  if(checksum != header.checksum) {
    errorThrow("dusk.dsk archive failed checksum verification.");
  }
  zip_error_t zipError;
  zip_error_init(&zipError);
  // freep=0 - this is a non-owning window into the same caller-owned
  // buffer, not an independent allocation libzip should free.
  zip_source_t *source = zip_source_buffer_create(
    data, header.size, 0, &zipError
  );
  if(source == NULL) {
    errorThrow(
      "Failed to create dusk.dsk source: %s", zip_error_strerror(&zipError)
    );
  }
  *outZip = zip_open_from_source(source, ZIP_RDONLY, &zipError);
  if(*outZip == NULL) {
    zip_source_free(source);
    errorThrow(
      "Failed to open dusk.dsk archive: %s", zip_error_strerror(&zipError)
    );
  }
  errorOk();
 }
@@ -0,0 +1,117 @@
 /**
 * Copyright (c) 2026 Dominic Masters
 *
 * This software is released under the MIT License.
 * https://opensource.org/licenses/MIT
 */
 #pragma once
 #include "error/error.h"
 #include <zip.h>
 // "DSK2" - distinct from a plain zip's "PK\x03\x04" so a stray plain zip
 // never gets misread as a valid dusk.dsk.
 #define ASSET_DSK_MAGIC_SIZE 4
 #define ASSET_DSK_MAGIC "DSK2"
 #define ASSET_DSK_VERSION 2
 // magic(4) + version(4) + size(4) + checksum(4), all little-endian
 // regardless of host - see assetDskParseHeader. The zip archive itself
 // starts immediately after, at ASSET_DSK_HEADER_SIZE.
 #define ASSET_DSK_HEADER_SIZE 16
 /**
 * Parsed dusk.dsk (DSK2 format) header. dusk.dsk is a single uncompressed
 * (ZIP_STORED) zip archive (see tools/asset/pack) rather than DEFLATEd -
 * the bulk of what's packed (audio, images) is already compressed at the
 * file level, so DEFLATE-ing the whole archive on top buys negligible
 * space for real CPU cost, and every entry gets the reliable repeated
 * seeking/re-opening that libzip only supports for uncompressed entries
 * (locale line-by-line reads, MP3 loop restarts, etc.) instead of just a
 * hand-picked subset of files.
 */
 typedef struct {
  uint32_t size;
  uint32_t checksum;
 } assetdskheader_t;
 /**
 * Parses a DSK2 header from a raw byte buffer (at least
 * ASSET_DSK_HEADER_SIZE bytes), validating the magic/version and
 * byte-swapping the little-endian fields to host order.
 *
 * @param bytes Buffer containing the header (and beyond).
 * @param bytesSize Number of bytes available at `bytes`.
 * @param outHeader Filled with the parsed header on success.
 * @return OK on success, error if too short, bad magic, or unsupported version.
 */
 errorret_t assetDskParseHeader(
  const uint8_t *bytes,
  const size_t bytesSize,
  assetdskheader_t *outHeader
 );
 /**
 * Opens the dusk.dsk archive given a filesystem path, using a lazy/
 * windowed file-backed zip source - no more memory used than the
 * existing per-platform small read buffers, matching the memory
 * characteristics of a plain zip_open() on the whole file. The checksum
 * is intentionally not verified here since doing so would require
 * reading the whole (potentially large) archive just to compute it.
 *
 * See assetDskOpenFromPathRange() for the case where the DSK2 blob isn't
 * the whole file (e.g. embedded inside another container).
 *
 * @param path Filesystem path to the dusk.dsk file.
 * @param outZip Set to the opened archive on success.
 * @return OK on success, error if the file is missing, too short, has a
 *         bad header, or the archive fails to open.
 */
 errorret_t assetDskOpenFromPath(
  const char_t *path,
  zip_t **outZip
 );
 /**
 * Same as assetDskOpenFromPath(), but the DSK2 blob doesn't start at the
 * beginning of `path` - it's a byte range embedded inside a larger
 * container file (e.g. the PSAR region of an EBOOT.PBP). Every offset the
 * header describes is relative to `baseOffset`; `baseSize` bounds them
 * (the size of the embedded blob, not the whole container file) - pass
 * SIZE_MAX to skip that check when the caller doesn't know/care.
 *
 * @param path Filesystem path to the container file.
 * @param baseOffset Byte offset within `path` where the DSK2 blob starts.
 * @param baseSize Number of bytes available at `baseOffset`.
 * @param outZip Set to the opened archive on success.
 * @return OK on success, error if the file is missing, too short, has a
 *         bad header, or the archive fails to open.
 */
 errorret_t assetDskOpenFromPathRange(
  const char_t *path,
  const size_t baseOffset,
  const size_t baseSize,
  zip_t **outZip
 );
 /**
 * Opens the dusk.dsk archive already fully resident in memory (e.g. a
 * PSAR embedded in an EBOOT.PBP, or an ISO-embedded file already read via
 * DVD_ReadAbs - platforms that already buffer the whole file for reasons
 * unrelated to this format). The returned archive doesn't take ownership
 * of `buffer` (it's opened as a non-owning sub-range of it) - the caller
 * remains responsible for freeing it, and must keep it alive for as long
 * as the archive stays open. Verifies the checksum, since the bytes are
 * already resident.
 *
 * @param buffer The whole dusk.dsk file's bytes.
 * @param bufferSize Number of bytes at `buffer`.
 * @param outZip Set to the opened archive on success.
 * @return OK on success, error if too short, has a bad header/checksum, or
 *         the archive fails to open.
 */
 errorret_t assetDskOpenFromBuffer(
  uint8_t *buffer,
  const size_t bufferSize,
  zip_t **outZip
 );
@@ -24,9 +24,11 @@ errorret_t assetFileInit(
  file->params = params;
  file->output = output;
  // Stat the file
  zip_stat_init(&file->stat);
-  if(!zip_stat(ASSET.zip, filename, 0, &file->stat) == 0) {
+  threadMutexLock(&ASSET.zipLock);
  int statResult = zip_stat(ASSET.zip, filename, 0, &file->stat);
  threadMutexUnlock(&ASSET.zipLock);
  if(statResult != 0) {
    errorThrow("Failed to stat asset file: %s", filename);
  }
@@ -47,6 +49,25 @@ errorret_t assetFileRewind(assetfile_t *file) {
    errorOk();
  }
  // Prefer seeking within the still-open handle over closing and
  // re-opening it. Repeatedly closing/re-opening the same compressed zip
  // entry (once per rewind - e.g. once per locale string lookup) was
  // confirmed unreliable on at least one platform's zip backend, silently
  // skipping ranges of the decompressed content on some re-opens after
  // the first. A real seek avoids that failure mode entirely, with no
  // extra memory cost over the close+reopen fallback.
  threadMutexLock(&ASSET.zipLock);
  bool_t seekable = zip_file_is_seekable(file->zipFile);
  int seekResult = seekable ? zip_fseek(file->zipFile, 0, SEEK_SET) : -1;
  threadMutexUnlock(&ASSET.zipLock);
  if(seekable) {
    if(seekResult != 0) {
      errorThrow("Failed to seek asset file: %s", file->filename);
    }
    file->position = 0;
    errorOk();
  }
  errorChain(assetFileClose(file));
  errorChain(assetFileOpen(file));
  errorOk();
@@ -55,10 +76,11 @@ errorret_t assetFileRewind(assetfile_t *file) {
 errorret_t assetFileOpen(assetfile_t *file) {
  assertNotNull(file, "Asset file cannot be NULL.");
  assertNotNull(file->filename, "Asset file filename cannot be NULL.");
  assertNotNull(ASSET.zip, "Asset zip cannot be NULL.");
  assertNull(file->zipFile, "Asset file already open.");
  threadMutexLock(&ASSET.zipLock);
  file->zipFile = zip_fopen(ASSET.zip, file->filename, 0);
  threadMutexUnlock(&ASSET.zipLock);
  if(file->zipFile == NULL) {
    errorThrow("Failed to open asset file: %s", file->filename);
  }
@@ -79,21 +101,52 @@ errorret_t assetFileRead(
    uint8_t tempBuffer[256];
    while(bytesRemaining > 0) {
      size_t chunkSize = mathMin(bytesRemaining, sizeof(tempBuffer));
      // The recursive call below already advances file->position by
      // chunkSize (the non-NULL branch does this itself) - do not also
      // advance it here, or every skip ends up double-counted.
      errorChain(assetFileRead(file, tempBuffer, chunkSize));
      file->position += chunkSize;
      bytesRemaining -= chunkSize;
    }
    file->lastRead = bufferSize;
    errorOk();
  }
-  // I assume zip_fread takes buffer NULL for skipping?
+  // Some zip_fread() implementations (seen on PSP) reject a single call
-  zip_int64_t bytesRead = zip_fread(file->zipFile, buffer, bufferSize);
+  // asking for the entire (potentially large) file at once with EINVAL;
  // the line reader above only ever asks for up to 1024 bytes per call and
  // works fine, so read in bounded chunks here too.
  size_t totalRead = 0;
  uint8_t *dest = (uint8_t *)buffer;
  while(totalRead < bufferSize) {
    size_t chunkSize = mathMin(
      bufferSize - totalRead, ASSET_FILE_READ_CHUNK_MAX
    );
    threadMutexLock(&ASSET.zipLock);
    zip_int64_t bytesRead = zip_fread(
      file->zipFile, dest + totalRead, chunkSize
    );
    errorret_t readError = errorOkImpl();
    if(bytesRead < 0) {
-    errorThrow("Failed to read from asset file: %s", file->filename);
+      // Built (not thrown) while still holding the lock, so
      // zip_file_strerror() reads the just-failed zipFile's error state
      // before another thread can touch it - errorThrow() itself isn't
      // used here since it returns immediately, which would leave
      // ASSET.zipLock held forever.
      readError = errorThrowImpl(
        &ERROR_STATE, ERROR_NOT_OK, __FILE__, __func__, __LINE__,
        "Failed to read from asset file: %s (%s)",
        file->filename, zip_file_strerror(file->zipFile)
      );
    }
-  file->position += bytesRead;
+    threadMutexUnlock(&ASSET.zipLock);
-  file->lastRead = bytesRead;
+    if(errorIsNotOk(readError)) {
      errorChain(readError);
    }
    if(bytesRead == 0) break;
    totalRead += (size_t)bytesRead;
  }
  file->position += totalRead;
  file->lastRead = totalRead;
  errorOk();
 }
@@ -101,7 +154,10 @@ errorret_t assetFileClose(assetfile_t *file) {
  assertNotNull(file, "Asset file cannot be NULL.");
  assertNotNull(file->zipFile, "Asset file must be opened before closing.");
-  if(zip_fclose(file->zipFile) != 0) {
+  threadMutexLock(&ASSET.zipLock);
  int closeResult = zip_fclose(file->zipFile);
  threadMutexUnlock(&ASSET.zipLock);
  if(closeResult != 0) {
    errorThrow("Failed to close asset file: %s", file->filename);
  }
  file->zipFile = NULL;
@@ -201,7 +257,7 @@ const uint8_t *assetFileLineReaderUnreadPtr(
  return reader->readBuffer + reader->bufferStart;
 }
-static errorret_t assetFileLineReaderAppend(
+errorret_t assetFileLineReaderAppend(
  assetfilelinereader_t *reader,
  const uint8_t *src,
  size_t srcLength
@@ -223,7 +279,7 @@ static errorret_t assetFileLineReaderAppend(
  errorOk();
 }
-static void assetFileLineReaderTerminate(assetfilelinereader_t *reader) {
+void assetFileLineReaderTerminate(assetfilelinereader_t *reader) {
  assertNotNull(reader, "Reader cannot be NULL.");
  assertNotNull(reader->outBuffer, "Out buffer cannot be NULL.");
  assertTrue(
@@ -233,7 +289,7 @@ static void assetFileLineReaderTerminate(assetfilelinereader_t *reader) {
  reader->outBuffer[reader->lineLength] = '\0';
 }
-static ssize_t assetFileLineReaderFindNewline(
+ssize_t assetFileLineReaderFindNewline(
  const assetfilelinereader_t *reader
 ) {
  size_t i;
@@ -9,7 +9,13 @@
 #include "error/error.h"
 #include <zip.h>
-#define ASSET_FILE_NAME_MAX 48
+#define ASSET_FILE_NAME_MAX 128
 // Max bytes requested per zip_fread() call in assetFileRead(). Some
 // zip_fread() implementations (seen on PSP) reject a single call asking
 // for very large amounts of data at once; the locale line reader has
 // always used 1024-byte reads successfully, so that's the proven-safe cap.
 #define ASSET_FILE_READ_CHUNK_MAX 1024
 typedef struct assetfile_s assetfile_t;
@@ -144,6 +150,63 @@ void assetFileLineReaderInit(
  const size_t outBufferSize
 );
 /**
 * Returns the number of bytes still unread in the line reader's read buffer.
 *
 * @param reader The line reader to check.
 * @return Number of unread bytes remaining in the read buffer.
 */
 size_t assetFileLineReaderUnreadBytes(const assetfilelinereader_t *reader);
 /**
 * Returns a pointer to the first unread byte in the line reader's read
 * buffer.
 *
 * @param reader The line reader to check.
 * @return Pointer to the first unread byte.
 */
 const uint8_t *assetFileLineReaderUnreadPtr(
  const assetfilelinereader_t *reader
 );
 /**
 * Appends src to the line reader's current line buffer, growing lineLength.
 *
 * @param reader The line reader whose out buffer to append to.
 * @param src Bytes to append.
 * @param srcLength Number of bytes in src.
 * @return Error state if any (the line would exceed the output buffer).
 */
 errorret_t assetFileLineReaderAppend(
  assetfilelinereader_t *reader,
  const uint8_t *src,
  size_t srcLength
 );
 /**
 * Null-terminates the line reader's current line buffer at lineLength.
 *
 * @param reader The line reader whose out buffer to terminate.
 */
 void assetFileLineReaderTerminate(assetfilelinereader_t *reader);
 /**
 * Searches the line reader's unread buffered bytes for a newline character.
 *
 * @param reader The line reader to search.
 * @return The index of the newline within readBuffer, or -1 if not found.
 */
 ssize_t assetFileLineReaderFindNewline(const assetfilelinereader_t *reader);
 /**
 * Refills the line reader's read buffer from the underlying file once its
 * buffered bytes are fully consumed. A no-op once the file is at EOF.
 *
 * @param reader The line reader to refill.
 * @return Error state if any.
 */
 errorret_t assetFileLineReaderFill(assetfilelinereader_t *reader);
 /**
 * Reads the next line from the asset file into the line buffer. The line
 * buffer is null-terminated and does not include the newline character.
@@ -17,3 +17,6 @@ add_subdirectory(locale)
 add_subdirectory(json)
 add_subdirectory(chunk)
 add_subdirectory(dmf)
 add_subdirectory(cutscene)
 add_subdirectory(wav)
 add_subdirectory(mp3)
@@ -35,22 +35,6 @@ void assetEntryInit(
    entry->input = NULL;
  }
  refInit(&entry->refs, entry, NULL, NULL, NULL);
  eventInit(
    &entry->onLoaded,
    entry->onLoadedCallbacks, entry->onLoadedUsers,
    ASSET_ENTRY_EVENT_MAX
  );
  eventInit(
    &entry->onUnloaded,
    entry->onUnloadedCallbacks, entry->onUnloadedUsers,
    ASSET_ENTRY_EVENT_MAX
  );
  eventInit(
    &entry->onError,
    entry->onErrorCallbacks, entry->onErrorUsers,
    ASSET_ENTRY_EVENT_MAX
  );
 }
 void assetEntryLock(assetentry_t *entry) {
@@ -97,7 +81,7 @@ errorret_t assetEntryDispose(assetentry_t *entry) {
    "Asset entry still refed at dispose time."
  );
-  eventInvoke(&entry->onUnloaded, entry);
+  if(entry->onUnloaded) entry->onUnloaded(entry, entry->onUnloadedUser);
  errorChain(ASSET_LOADER_CALLBACKS[entry->type].dispose(entry));
  memoryZero(entry, sizeof(assetentry_t));
  errorOk();
@@ -7,7 +7,6 @@
 #pragma once
 #include "asset/loader/assetloading.h"
 #include "event/event.h"
 #include "util/ref.h"
 typedef enum {
@@ -20,11 +19,17 @@ typedef enum {
  ASSET_ENTRY_STATE_ERROR
 } assetentrystate_t;
 /** Maximum number of subscribers for each per-entry event. */
 #define ASSET_ENTRY_EVENT_MAX 2
 typedef struct assetentry_s assetentry_t;
 /**
 * A single asset entry callback. Each entry supports at most one subscriber
 * per event - a second assignment without clearing the first is a bug.
 *
 * @param entry The assetentry_t the event fired on.
 * @param user The user pointer passed alongside the callback.
 */
 typedef void (*assetentrycallback_t)(assetentry_t *entry, void *user);
 struct assetentry_s {
  char_t name[ASSET_FILE_NAME_MAX];
  assetloadertype_t type;
@@ -33,30 +38,27 @@ struct assetentry_s {
  ref_t refs;
  assetloaderinput_t *input;
  assetloaderinput_t inputData;
  /**
   * Fired once when loading completes successfully (params = assetentry_t *).
   * Always invoked on the main thread.
   */
  event_t onLoaded;
  eventcallback_t onLoadedCallbacks[ASSET_ENTRY_EVENT_MAX];
  void *onLoadedUsers[ASSET_ENTRY_EVENT_MAX];
  /**
-   * Fired once when the entry is disposed/reaped (params = assetentry_t *).
+   * Fired once when loading completes successfully.
   * The asset data is still accessible when the callback runs.
   * Always invoked on the main thread.
   */
-  event_t onUnloaded;
+  assetentrycallback_t onLoaded;
-  eventcallback_t onUnloadedCallbacks[ASSET_ENTRY_EVENT_MAX];
+  void *onLoadedUser;
  void *onUnloadedUsers[ASSET_ENTRY_EVENT_MAX];
  /**
-   * Fired once when loading fails (params = assetentry_t *).
+   * Fired once when the entry is disposed/reaped. The asset data is still
   * accessible when the callback runs. Always invoked on the main thread.
   */
  assetentrycallback_t onUnloaded;
  void *onUnloadedUser;
  /**
   * Fired once when loading fails.
   * Always invoked on the main thread.
   */
-  event_t onError;
+  assetentrycallback_t onError;
-  eventcallback_t onErrorCallbacks[ASSET_ENTRY_EVENT_MAX];
+  void *onErrorUser;
  void *onErrorUsers[ASSET_ENTRY_EVENT_MAX];
 };
 /**
@@ -51,4 +51,22 @@ assetloadercallbacks_t ASSET_LOADER_CALLBACKS[ASSET_LOADER_TYPE_COUNT] = {
    .loadAsync = assetChunkLoaderAsync,
    .dispose = assetChunkDispose
  },
  [ASSET_LOADER_TYPE_CUTSCENE] = {
    .loadSync = assetCutsceneLoaderSync,
    .loadAsync = assetCutsceneLoaderAsync,
    .dispose = assetCutsceneDispose
  },
  [ASSET_LOADER_TYPE_WAV] = {
    .loadSync = assetWavLoaderSync,
    .loadAsync = assetWavLoaderAsync,
    .dispose = assetWavDispose
  },
  [ASSET_LOADER_TYPE_MP3] = {
    .loadSync = assetMp3LoaderSync,
    .loadAsync = assetMp3LoaderAsync,
    .dispose = assetMp3Dispose
  },
 };
@@ -13,6 +13,9 @@
 #include "asset/loader/locale/assetlocaleloader.h"
 #include "asset/loader/json/assetjsonloader.h"
 #include "asset/loader/chunk/assetchunkloader.h"
 #include "asset/loader/cutscene/assetcutsceneloader.h"
 #include "asset/loader/wav/assetwavloader.h"
 #include "asset/loader/mp3/assetmp3loader.h"
 typedef enum {
  ASSET_LOADER_TYPE_NULL,
@@ -24,6 +27,9 @@ typedef enum {
  ASSET_LOADER_TYPE_LOCALE,
  ASSET_LOADER_TYPE_JSON,
  ASSET_LOADER_TYPE_CHUNK,
  ASSET_LOADER_TYPE_CUTSCENE,
  ASSET_LOADER_TYPE_WAV,
  ASSET_LOADER_TYPE_MP3,
  ASSET_LOADER_TYPE_COUNT
 } assetloadertype_t;
@@ -36,6 +42,9 @@ typedef union {
  assetlocaleloaderloading_t locale;
  assetjsonloaderloading_t json;
  assetchunkloaderloading_t chunk;
  assetcutsceneloaderloading_t cutscene;
  assetwavloaderloading_t wav;
  assetmp3loaderloading_t mp3;
 } assetloaderloading_t;
 typedef union {
@@ -46,6 +55,9 @@ typedef union {
  assetlocaleoutput_t locale;
  assetjsonoutput_t json;
  assetchunkoutput_t chunk;
  assetcutsceneoutput_t cutscene;
  assetwavoutput_t wav;
  assetmp3output_t mp3;
 } assetloaderoutput_t;
 typedef union {
@@ -54,6 +66,9 @@ typedef union {
  assetlocaleloaderinput_t locale;
  assetjsonloaderinput_t json;
  assetchunkloaderinput_t chunk;
  assetcutsceneloaderinput_t cutscene;
  assetwavloaderinput_t wav;
  assetmp3loaderinput_t mp3;
 } assetloaderinput_t;
 typedef struct assetloading_s assetloading_t;
@@ -8,40 +8,284 @@
 #include "assetchunkloader.h"
 #include "assert/assert.h"
 #include "util/memory.h"
-#include "util/endian.h"
+#include "util/string.h"
 #include "asset/asset.h"
 #include "asset/loader/assetloading.h"
 #include "asset/loader/assetentry.h"
 #include "asset/loader/assetloader.h"
-#include "asset/asset.h"
+#include "asset/loader/json/assetjsonloader.h"
 #include "display/color.h"
 #include "display/texture/texture.h"
 #include "rpg/overworld/worldpos.h"
 #include "yyjson.h"
 #define ASSET_CHUNK_TERRAIN_TEXTURE "tiles.png"
 // Per-shape corner Z offsets (sw, se, ne, nw) as offsets from a tile's own
 // base Z, ported 1:1 from tools/asset/chunk/__main__.py's _RAMP_CORNERS.
 // TILE_SHAPE_NULL's row is never read - assetChunkTilesHaveTerrain/
 // assetChunkBuildTerrain skip those tiles outright.
 static const float_t CHUNK_RAMP_CORNERS[TILE_SHAPE_COUNT][4] = {
  [TILE_SHAPE_GROUND]               = {0.0f, 0.0f, 0.0f, 0.0f},
  [TILE_SHAPE_RAMP_NORTH]           = {0.0f, 0.0f, 1.0f, 1.0f},
  [TILE_SHAPE_RAMP_SOUTH]           = {1.0f, 1.0f, 0.0f, 0.0f},
  [TILE_SHAPE_RAMP_EAST]            = {0.0f, 1.0f, 1.0f, 0.0f},
  [TILE_SHAPE_RAMP_WEST]            = {1.0f, 0.0f, 0.0f, 1.0f},
  [TILE_SHAPE_RAMP_NORTHEAST]       = {0.0f, 0.0f, 1.0f, 0.0f},
  [TILE_SHAPE_RAMP_NORTHWEST]       = {0.0f, 0.0f, 0.0f, 1.0f},
  [TILE_SHAPE_RAMP_SOUTHEAST]       = {0.0f, 1.0f, 0.0f, 0.0f},
  [TILE_SHAPE_RAMP_SOUTHWEST]       = {1.0f, 0.0f, 0.0f, 0.0f},
  [TILE_SHAPE_RAMP_NORTHEAST_INNER] = {0.0f, 1.0f, 1.0f, 1.0f},
  [TILE_SHAPE_RAMP_NORTHWEST_INNER] = {1.0f, 0.0f, 1.0f, 1.0f},
  [TILE_SHAPE_RAMP_SOUTHEAST_INNER] = {1.0f, 1.0f, 1.0f, 0.0f},
  [TILE_SHAPE_RAMP_SOUTHWEST_INNER] = {1.0f, 1.0f, 0.0f, 1.0f},
 };
 errorret_t assetChunkLoaderAsync(assetloading_t *loading) {
  assertNotNull(loading, "Loading cannot be NULL");
  assertNotMainThread("Should be called from an async thread.");
  if(loading->loading.chunk.state != ASSET_CHUNK_LOADING_STATE_READ_FILE) {
  errorOk();
 }
-  assertNull(loading->loading.chunk.data, "Data already defined?");
+static bool_t assetChunkTilesHaveTerrain(const tile_t *tiles) {
  for(uint32_t i = 0; i < CHUNK_TILE_COUNT; i++) {
    if(tiles[i].shape != TILE_SHAPE_NULL) return true;
  }
  return false;
 }
-  assetfile_t *file = &loading->loading.chunk.file;
+// Reads the "tiles" array - a dense, fixed-size CHUNK_TILE_COUNT grid,
-  assetLoaderErrorChain(loading,
+// one slot per (x, y) column at index x + y * CHUNK_WIDTH (position is
-    assetFileInit(file, loading->entry->name, NULL, NULL)
+// implicit in the index, not stored). Each slot is either `null` (empty
 // column, already zeroed = TILE_SHAPE_NULL) or a 2-element [type, z]
 // array.
 static void assetChunkParseTiles(yyjson_val *root, tile_t *tiles) {
  memoryZero(tiles, CHUNK_TILE_COUNT * sizeof(tile_t));
  yyjson_val *tilesArr = yyjson_obj_get(root, "tiles");
  if(!yyjson_is_arr(tilesArr)) return;
  size_t idx, len;
  yyjson_val *tileVal;
  yyjson_arr_foreach(tilesArr, idx, len, tileVal) {
    if(idx >= CHUNK_TILE_COUNT) break;
    if(!yyjson_is_arr(tileVal) || yyjson_arr_size(tileVal) < 2) continue;
    int32_t type = (int32_t)yyjson_get_int(yyjson_arr_get(tileVal, 0));
    int32_t z = (int32_t)yyjson_get_int(yyjson_arr_get(tileVal, 1));
    tiles[idx] = (tile_t){ .shape = (tileshape_t)type, .z = (uint8_t)z };
  }
 }
 // Resolves "meshes" (external building references, by bare filename) into
 // out->modelNames/meshOffsets starting at *ioIndex, advancing it as
 // entries are written. Filenames are resolved as
 // "models/buildings/<basename>.json" - a hardcoded stand-in for
 // tools/asset/chunk/__main__.py's find_model() recursive search, valid
 // as long as every building model lives flat under that one directory
 // (true today - see the raw-json-maps plan notes for the tradeoff).
 static void assetChunkParseMeshes(
  yyjson_val *root, assetchunkoutput_t *out, uint8_t *ioIndex
 ) {
  yyjson_val *meshesArr = yyjson_obj_get(root, "meshes");
  if(!yyjson_is_arr(meshesArr)) return;
  size_t idx, len;
  yyjson_val *meshVal;
  yyjson_arr_foreach(meshesArr, idx, len, meshVal) {
    if(*ioIndex >= CHUNK_MESH_COUNT_MAX) break;
    yyjson_val *fileVal = yyjson_obj_get(meshVal, "file");
    if(!fileVal || !yyjson_is_str(fileVal)) continue;
    char_t baseName[CHUNK_MESH_NAME_MAX];
    stringCopy(baseName, yyjson_get_str(fileVal), sizeof(baseName));
    char_t *dot = stringFindLastChar(baseName, '.');
    if(dot != NULL) *dot = '\0';
    uint8_t m = *ioIndex;
    stringFormat(
      out->modelNames[m], CHUNK_MESH_NAME_MAX,
      "models/buildings/%s.json", baseName
    );
-  uint8_t *data = memoryAllocate(file->size);
+    vec3 offset = {0.0f, 0.0f, 0.0f};
-  assetLoaderErrorChain(loading, assetFileOpen(file));
+    yyjson_val *posArr = yyjson_obj_get(meshVal, "pos");
-  assetLoaderErrorChain(loading, assetFileRead(file, data, file->size));
+    if(yyjson_is_arr(posArr) && yyjson_arr_size(posArr) >= 3) {
-  assetLoaderErrorChain(loading, assetFileClose(file));
+      offset[0] = (float_t)yyjson_get_num(yyjson_arr_get(posArr, 0));
-  assetLoaderErrorChain(loading, assetFileDispose(file));
+      offset[1] = (float_t)yyjson_get_num(yyjson_arr_get(posArr, 1));
-  assertTrue(
+      offset[2] = (float_t)yyjson_get_num(yyjson_arr_get(posArr, 2));
-    file->lastRead == file->size,
+    }
-    "Failed to read entire chunk file."
+    memoryCopy(out->meshOffsets[m], offset, sizeof(vec3));
    (*ioIndex)++;
  }
 }
 static void assetChunkParseEntities(yyjson_val *root, assetchunkoutput_t *out) {
  out->entitySpawnCount = 0;
  yyjson_val *arr = yyjson_obj_get(root, "entities");
  if(!yyjson_is_arr(arr)) return;
  size_t idx, len;
  yyjson_val *val;
  yyjson_arr_foreach(arr, idx, len, val) {
    if(out->entitySpawnCount >= CHUNK_ENTITY_SPAWN_COUNT_MAX) break;
    const char_t *type = yyjson_get_str(yyjson_obj_get(val, "type"));
    yyjson_val *posArr = yyjson_obj_get(val, "pos");
    if(type == NULL || !yyjson_is_arr(posArr) || yyjson_arr_size(posArr) < 3) {
      continue;
    }
    worldpos_t pos = {
      .x = (worldunit_t)yyjson_get_int(yyjson_arr_get(posArr, 0)),
      .y = (worldunit_t)yyjson_get_int(yyjson_arr_get(posArr, 1)),
      .z = (worldunit_t)yyjson_get_int(yyjson_arr_get(posArr, 2)),
    };
    chunkentityspawn_t *spawn = &out->entitySpawns[out->entitySpawnCount];
    if(stringEquals(type, "global")) {
      spawn->kind = CHUNK_ENTITY_SPAWN_KIND_GLOBAL;
      spawn->globalId =
        (uint16_t)yyjson_get_int(yyjson_obj_get(val, "globalId"));
      spawn->itemId = 0;
      spawn->itemQuantity = 0;
    } else if(stringEquals(type, "item")) {
      spawn->kind = CHUNK_ENTITY_SPAWN_KIND_ITEM;
      spawn->globalId = 0;
      spawn->itemId = (uint16_t)yyjson_get_int(yyjson_obj_get(val, "itemId"));
      spawn->itemQuantity =
        (uint8_t)yyjson_get_int(yyjson_obj_get(val, "quantity"));
    } else {
      continue;
    }
    spawn->position = pos;
    out->entitySpawnCount++;
  }
 }
 static void assetChunkParseAreas(yyjson_val *root, assetchunkoutput_t *out) {
  out->areaSpawnCount = 0;
  yyjson_val *arr = yyjson_obj_get(root, "areas");
  if(!yyjson_is_arr(arr)) return;
  size_t idx, len;
  yyjson_val *val;
  yyjson_arr_foreach(arr, idx, len, val) {
    if(out->areaSpawnCount >= CHUNK_AREA_COUNT_MAX) break;
    yyjson_val *minArr = yyjson_obj_get(val, "min");
    yyjson_val *maxArr = yyjson_obj_get(val, "max");
    if(
      !yyjson_is_arr(minArr) || yyjson_arr_size(minArr) < 3 ||
      !yyjson_is_arr(maxArr) || yyjson_arr_size(maxArr) < 3
    ) continue;
    chunkareaspawn_t *area = &out->areaSpawns[out->areaSpawnCount];
    area->min = (worldpos_t){
      .x = (worldunit_t)yyjson_get_int(yyjson_arr_get(minArr, 0)),
      .y = (worldunit_t)yyjson_get_int(yyjson_arr_get(minArr, 1)),
      .z = (worldunit_t)yyjson_get_int(yyjson_arr_get(minArr, 2)),
    };
    area->max = (worldpos_t){
      .x = (worldunit_t)yyjson_get_int(yyjson_arr_get(maxArr, 0)),
      .y = (worldunit_t)yyjson_get_int(yyjson_arr_get(maxArr, 1)),
      .z = (worldunit_t)yyjson_get_int(yyjson_arr_get(maxArr, 2)),
    };
    area->callbackId =
      (uint16_t)yyjson_get_int(yyjson_obj_get(val, "callbackId"));
    area->notify = (uint8_t)yyjson_get_int(yyjson_obj_get(val, "notify"));
    area->trigger = (uint8_t)yyjson_get_int(yyjson_obj_get(val, "trigger"));
    out->areaSpawnCount++;
  }
 }
 // Six vertices (2 CCW triangles) for one tile's quad, matching
 // tools/asset/chunk/__main__.py's _tile_quad. Corner order: SW=(x,y),
 // SE=(x+1,y), NE=(x+1,y+1), NW=(x,y+1). NORTH=+Y, EAST=+X.
 static void assetChunkAppendTileQuad(
  meshvertex_t *verts, uint32_t *vertCount,
  const uint32_t x, const uint32_t y,
  const float_t sw, const float_t se, const float_t ne, const float_t nw
 ) {
  const float_t u0 = (float_t)x / (float_t)CHUNK_WIDTH;
  const float_t u1 = (float_t)(x + 1) / (float_t)CHUNK_WIDTH;
  const float_t v0 = (float_t)y / (float_t)CHUNK_HEIGHT;
  const float_t v1 = (float_t)(y + 1) / (float_t)CHUNK_HEIGHT;
  const float_t fx = (float_t)x;
  const float_t fy = (float_t)y;
  meshvertex_t *v = verts + *vertCount;
  v[0] = (meshvertex_t){ .uv = {u0, v0}, .pos = {fx,     fy,     sw} };
  v[1] = (meshvertex_t){ .uv = {u1, v0}, .pos = {fx + 1, fy,     se} };
  v[2] = (meshvertex_t){ .uv = {u1, v1}, .pos = {fx + 1, fy + 1, ne} };
  v[3] = (meshvertex_t){ .uv = {u0, v0}, .pos = {fx,     fy,     sw} };
  v[4] = (meshvertex_t){ .uv = {u1, v1}, .pos = {fx + 1, fy + 1, ne} };
  v[5] = (meshvertex_t){ .uv = {u0, v1}, .pos = {fx,     fy + 1, nw} };
  *vertCount += 6;
 }
 // Builds a mesh_t straight from the tile grid - one quad per non-null
 // tile column, shaped by CHUNK_RAMP_CORNERS - the runtime equivalent of
 // tools/asset/chunk/__main__.py's build_terrain_verts. Only called once
 // assetChunkTilesHaveTerrain has confirmed at least one real tile exists.
 // Mirrors assetMeshLoaderSync's meshInit/meshFlush/free-after-upload
 // sequence (assetmeshloader.c) since this produces the same
 // assetmeshoutput_t shape, just from generated verts instead of a file.
 static errorret_t assetChunkBuildTerrain(
  const tile_t *tiles, assetmeshoutput_t *out
 ) {
  meshvertex_t *verts = memoryAllocate(
    CHUNK_TILE_COUNT * 6 * sizeof(meshvertex_t)
  );
  uint32_t vertCount = 0;
  for(uint32_t y = 0; y < CHUNK_HEIGHT; y++) {
    for(uint32_t x = 0; x < CHUNK_WIDTH; x++) {
      const tile_t *tile = &tiles[x + y * CHUNK_WIDTH];
      if(tile->shape == TILE_SHAPE_NULL) continue;
      const float_t *corners = CHUNK_RAMP_CORNERS[tile->shape];
      const float_t fz = (float_t)tile->z;
      assetChunkAppendTileQuad(
        verts, &vertCount, x, y,
        (fz + corners[0]) * WORLD_LAYER_HEIGHT,
        (fz + corners[1]) * WORLD_LAYER_HEIGHT,
        (fz + corners[2]) * WORLD_LAYER_HEIGHT,
        (fz + corners[3]) * WORLD_LAYER_HEIGHT
      );
    }
  }
  assertTrue(vertCount > 0, "Terrain build called with no terrain tiles.");
  out->vertices = verts;
  errorret_t ret = meshInit(
    &out->mesh, MESH_PRIMITIVE_TYPE_TRIANGLES, (int32_t)vertCount, verts
  );
  if(errorIsNotOk(ret)) {
    memoryFree(out->vertices);
    out->vertices = NULL;
    errorChain(ret);
  }
  out->meshInitialized = true;
  ret = meshFlush(&out->mesh, 0, (int32_t)vertCount);
  if(errorIsNotOk(ret)) {
    meshDispose(&out->mesh);
    out->meshInitialized = false;
    memoryFree(out->vertices);
    out->vertices = NULL;
    errorChain(ret);
  }
  #if defined(DUSK_OPENGL) && !defined(DUSK_OPENGL_LEGACY)
    memoryFree(out->vertices);
    out->vertices = NULL;
  #endif
  loading->loading.chunk.data = data;
  loading->loading.chunk.state = ASSET_CHUNK_LOADING_STATE_PARSE;
  loading->entry->state = ASSET_ENTRY_STATE_PENDING_SYNC;
  errorOk();
 }
@@ -54,8 +298,8 @@ errorret_t assetChunkLoaderSync(assetloading_t *loading) {
  switch(loading->loading.chunk.state) {
    case ASSET_CHUNK_LOADING_STATE_INITIAL:
-      loading->loading.chunk.state = ASSET_CHUNK_LOADING_STATE_READ_FILE;
+      loading->loading.chunk.state = ASSET_CHUNK_LOADING_STATE_PARSE;
-      loading->entry->state = ASSET_ENTRY_STATE_PENDING_ASYNC;
+      loading->entry->state = ASSET_ENTRY_STATE_PENDING_SYNC;
      errorOk();
    case ASSET_CHUNK_LOADING_STATE_PARSE:
@@ -68,9 +312,7 @@ errorret_t assetChunkLoaderSync(assetloading_t *loading) {
          out->modelEntries[m] = assetLock(
            out->modelNames[m], ASSET_LOADER_TYPE_MODEL, NULL
          );
-          assertNotNull(
+          assertNotNull(out->modelEntries[m], "Failed to lock model.");
            out->modelEntries[m], "Failed to lock model."
          );
          loading->entry->state = ASSET_ENTRY_STATE_PENDING_SYNC;
          errorOk();
        }
@@ -92,62 +334,95 @@ errorret_t assetChunkLoaderSync(assetloading_t *loading) {
      errorOk();
  }
-  uint8_t *data = loading->loading.chunk.data;
+  // --- PARSE: lock+require the chunk's own JSON as a sub-asset, exactly
-  assertNotNull(data, "Chunk data should have been loaded by now.");
+  // like assetmodelloader.c's ASSET_MODEL_LOADING_STATE_LOCK_ASSETS does
-
+  // for its model descriptor, then read everything out of it before
-  if(data[0] != 'D' || data[1] != 'C' || data[2] != 'F') {
+  // unlocking (the yyjson_doc/vals only stay valid while jsonEntry does).
-    memoryFree(data);
+  char_t jsonKey[ASSET_FILE_NAME_MAX];
-    assetLoaderErrorThrow(loading, "Invalid chunk file header");
+  stringFormat(jsonKey, sizeof(jsonKey), "json:%s", loading->entry->name);
-  }
+  assetloaderinput_t jsonInput;
-
+  memoryZero(&jsonInput, sizeof(jsonInput));
-  uint32_t version = endianLittleToHost32(*(uint32_t *)(data + 4));
+  stringCopy(
-  if(version != ASSET_CHUNK_FILE_VERSION) {
+    jsonInput.json.path, loading->entry->name, ASSET_FILE_NAME_MAX
-    memoryFree(data);
+  );
  assetentry_t *jsonEntry =
    assetLock(jsonKey, ASSET_LOADER_TYPE_JSON, &jsonInput);
  errorret_t jsonRet = assetRequireLoaded(jsonEntry);
  if(errorIsNotOk(jsonRet)) {
    assetUnlockEntry(jsonEntry);
    assetLoaderErrorThrow(
-      loading, "Unsupported chunk file version %u", version
+      loading, "Failed to load chunk JSON: %s", loading->entry->name
    );
  }
-  size_t offset = 8;
+  yyjson_val *root = yyjson_doc_get_root(jsonEntry->data.json);
-  size_t tileSize = CHUNK_TILE_COUNT * sizeof(tile_t);
+  tile_t tiles[CHUNK_TILE_COUNT];
-  out->tiles = memoryAllocate(tileSize);
+  assetChunkParseTiles(root, tiles);
-  memoryCopy(out->tiles, data + offset, tileSize);
+  out->hasTerrain = assetChunkTilesHaveTerrain(tiles);
  offset += tileSize;
-  for(size_t t = 0; t < CHUNK_TILE_COUNT; t++) {
+  uint8_t meshIndex = out->hasTerrain ? 1 : 0;
-    uint32_t *shape = (uint32_t *)&out->tiles[t].shape;
+  assetChunkParseMeshes(root, out, &meshIndex);
-    *shape = endianLittleToHost32(*shape);
+  out->meshCount = meshIndex;
  }
-  out->meshCount = data[offset];
+  assetChunkParseEntities(root, out);
-  offset += sizeof(uint8_t);
+  assetChunkParseAreas(root, out);
-  assertTrue(
+
-    out->meshCount <= CHUNK_MESH_COUNT_MAX,
+  assetUnlockEntry(jsonEntry);
-    "Chunk mesh count exceeds maximum."
+
  out->tiles = memoryAllocate(CHUNK_TILE_COUNT * sizeof(tile_t));
  memoryCopy(out->tiles, tiles, CHUNK_TILE_COUNT * sizeof(tile_t));
  // Terrain: build the mesh, then wrap it in synthetic (non-cache,
  // non-refcounted) mesh/model entries so modelEntries[0] behaves exactly
  // like a real file-backed model entry for every downstream consumer -
  // see the header's doc comment on hasTerrain/terrainMeshEntry.
  if(out->hasTerrain) {
    assetmeshoutput_t terrainMesh;
    memoryZero(&terrainMesh, sizeof(terrainMesh));
    errorret_t terrainRet = assetChunkBuildTerrain(out->tiles, &terrainMesh);
    if(errorIsNotOk(terrainRet)) {
      memoryFree(out->tiles);
      out->tiles = NULL;
      assetLoaderErrorThrow(
        loading, "Failed to build chunk terrain mesh: %s",
        loading->entry->name
      );
  for(uint8_t m = 0; m < out->meshCount; m++) {
    uint8_t nameLen = 0;
    while(
      data[offset + nameLen] != '\0' &&
      nameLen < CHUNK_MESH_NAME_MAX - 1
    ) {
      nameLen++;
    }
    memoryCopy(out->modelNames[m], data + offset, nameLen);
    out->modelNames[m][nameLen] = '\0';
    offset += nameLen + 1;
    memoryCopy(out->meshOffsets[m], data + offset, sizeof(vec3));
    offset += sizeof(vec3);
    out->meshOffsets[m][0] = endianLittleToHostFloat(out->meshOffsets[m][0]);
    out->meshOffsets[m][1] = endianLittleToHostFloat(out->meshOffsets[m][1]);
    out->meshOffsets[m][2] = endianLittleToHostFloat(out->meshOffsets[m][2]);
    }
-  memoryFree(data);
+    assetloaderinput_t texInput = { .texture = TEXTURE_FORMAT_RGBA };
-  loading->loading.chunk.data = NULL;
+    assetentry_t *texEntry = assetLock(
      ASSET_CHUNK_TERRAIN_TEXTURE, ASSET_LOADER_TYPE_TEXTURE, &texInput
    );
    errorret_t texRet = assetRequireLoaded(texEntry);
    if(errorIsNotOk(texRet)) {
      assetUnlockEntry(texEntry);
      meshDispose(&terrainMesh.mesh);
      memoryFree(out->tiles);
      out->tiles = NULL;
      assetLoaderErrorThrow(
        loading, "Failed to load chunk terrain texture: %s",
        loading->entry->name
      );
    }
    out->terrainTexEntry = texEntry;
    out->terrainMeshEntry = memoryAllocate(sizeof(assetentry_t));
    memoryZero(out->terrainMeshEntry, sizeof(assetentry_t));
    out->terrainMeshEntry->type = ASSET_LOADER_TYPE_MESH;
    out->terrainMeshEntry->state = ASSET_ENTRY_STATE_LOADED;
    out->terrainMeshEntry->data.mesh = terrainMesh;
    out->terrainModelEntry = memoryAllocate(sizeof(assetentry_t));
    memoryZero(out->terrainModelEntry, sizeof(assetentry_t));
    out->terrainModelEntry->type = ASSET_LOADER_TYPE_MODEL;
    out->terrainModelEntry->state = ASSET_ENTRY_STATE_LOADED;
    out->terrainModelEntry->data.model.meshEntry = out->terrainMeshEntry;
    out->terrainModelEntry->data.model.texEntry = out->terrainTexEntry;
    out->terrainModelEntry->data.model.color = COLOR_WHITE;
    out->modelEntries[0] = out->terrainModelEntry;
  }
  if(out->meshCount == 0) {
    loading->entry->state = ASSET_ENTRY_STATE_LOADED;
@@ -155,7 +430,7 @@ errorret_t assetChunkLoaderSync(assetloading_t *loading) {
  }
  loading->loading.chunk.state = ASSET_CHUNK_LOADING_STATE_LOAD_MODELS;
-  loading->loading.chunk.modelIndex = 0;
+  loading->loading.chunk.modelIndex = out->hasTerrain ? 1 : 0;
  loading->entry->state = ASSET_ENTRY_STATE_PENDING_SYNC;
  errorOk();
 }
@@ -174,8 +449,36 @@ errorret_t assetChunkDispose(assetentry_t *entry) {
  for(uint8_t m = 0; m < out->meshCount; m++) {
    if(out->modelEntries[m] == NULL) continue;
    if(out->hasTerrain && m == 0) continue; // synthetic - freed below.
    assetUnlockEntry(out->modelEntries[m]);
    out->modelEntries[m] = NULL;
  }
  if(out->hasTerrain) {
    if(out->terrainMeshEntry != NULL) {
      assetmeshoutput_t *meshOut = &out->terrainMeshEntry->data.mesh;
      if(meshOut->meshInitialized) {
        meshDispose(&meshOut->mesh);
        meshOut->meshInitialized = false;
      }
      if(meshOut->vertices != NULL) {
        memoryFree(meshOut->vertices);
        meshOut->vertices = NULL;
      }
      memoryFree(out->terrainMeshEntry);
      out->terrainMeshEntry = NULL;
    }
    if(out->terrainModelEntry != NULL) {
      memoryFree(out->terrainModelEntry);
      out->terrainModelEntry = NULL;
    }
    if(out->terrainTexEntry != NULL) {
      assetUnlockEntry(out->terrainTexEntry);
      out->terrainTexEntry = NULL;
    }
    out->modelEntries[0] = NULL;
    out->hasTerrain = false;
  }
  errorOk();
 }
@@ -9,8 +9,6 @@
 #include "asset/assetfile.h"
 #include "rpg/overworld/chunk.h"
 #define ASSET_CHUNK_FILE_VERSION 4
 typedef struct assetloading_s assetloading_t;
 typedef struct assetentry_s assetentry_t;
@@ -20,31 +18,81 @@ typedef struct {
 typedef enum {
  ASSET_CHUNK_LOADING_STATE_INITIAL,
  ASSET_CHUNK_LOADING_STATE_READ_FILE,
  ASSET_CHUNK_LOADING_STATE_PARSE,
  ASSET_CHUNK_LOADING_STATE_LOAD_MODELS,
  ASSET_CHUNK_LOADING_STATE_DONE
 } assetchunkloadingstate_t;
 typedef struct {
  assetfile_t file;
  assetchunkloadingstate_t state;
-  uint8_t *data;
+
  // Index into assetchunkoutput_t.modelNames/modelEntries the external
  // (non-terrain) model polling loop has reached - see
  // ASSET_CHUNK_LOADING_STATE_LOAD_MODELS.
  uint8_t modelIndex;
 } assetchunkloaderloading_t;
 typedef enum {
  CHUNK_ENTITY_SPAWN_KIND_GLOBAL,
  CHUNK_ENTITY_SPAWN_KIND_ITEM
 } chunkentityspawnkind_t;
 typedef struct {
  chunkentityspawnkind_t kind;
  uint16_t globalId;    // Valid when kind == CHUNK_ENTITY_SPAWN_KIND_GLOBAL.
  uint16_t itemId;      // Valid when kind == CHUNK_ENTITY_SPAWN_KIND_ITEM.
  uint8_t itemQuantity; // Valid when kind == CHUNK_ENTITY_SPAWN_KIND_ITEM.
  worldpos_t position;
 } chunkentityspawn_t;
 typedef struct {
  worldpos_t min;
  worldpos_t max;
  uint16_t callbackId; // Index into MAP_AREA_CALLBACK_LIST.
  uint8_t notify;
  uint8_t trigger;
 } chunkareaspawn_t;
 typedef struct {
  tile_t *tiles;
  uint8_t meshCount;
  char_t modelNames[CHUNK_MESH_COUNT_MAX][CHUNK_MESH_NAME_MAX];
  vec3 meshOffsets[CHUNK_MESH_COUNT_MAX];
  assetentry_t *modelEntries[CHUNK_MESH_COUNT_MAX];
  // Terrain mesh generated at load time from the tile grid (no baked
  // .dmf/.json - see assetChunkBuildTerrain in assetchunkloader.c). NULL
  // (with hasTerrain false) for a chunk with no non-null tiles, in which
  // case modelEntries[0] (if meshCount > 0) is the first external mesh
  // instead - matches the old baked pipeline's "only write a terrain
  // model if it has vertices" behavior.
  //
  // terrainMeshEntry/terrainModelEntry are heap-allocated, plain
  // assetentry_t values that are never passed to assetLock/assetGetEntry/
  // assetUnlockEntry (only a real, name-keyed, ref-counted entry may be)
  // - they exist purely so modelEntries[0] can point at something with
  // the same ->state/->data.model/->data.mesh.mesh shape every other
  // model/mesh entry has, so chunk.c/map.c/sceneoverworld.c don't need to
  // know terrain isn't file-backed. Freed directly (not assetUnlockEntry)
  // in assetChunkDispose. terrainTexEntry is a real, ref-counted texture
  // entry (the shared "tiles.png") and must be assetUnlockEntry'd there.
  bool_t hasTerrain;
  assetentry_t *terrainMeshEntry;
  assetentry_t *terrainModelEntry;
  assetentry_t *terrainTexEntry;
  uint8_t entitySpawnCount;
  chunkentityspawn_t entitySpawns[CHUNK_ENTITY_SPAWN_COUNT_MAX];
  uint8_t areaSpawnCount;
  chunkareaspawn_t areaSpawns[CHUNK_AREA_COUNT_MAX];
 } assetchunkoutput_t;
 /**
- * Asynchronous loader for chunk assets. Reads the raw DCF file bytes into
+ * Async loader stub for chunk assets. Chunk loading is performed entirely
- * the loading buffer so the sync phase can parse without blocking the
+ * on the main thread (it delegates to the JSON asset loader and to
- * main thread on I/O.
+ * meshInit/meshFlush, both main-thread-only); this callback is never
 * reached.
 *
 * @param loading Loading information for the asset being loaded.
 * @return Error code indicating success or failure of the load operation.
@@ -52,9 +100,11 @@ typedef struct {
 errorret_t assetChunkLoaderAsync(assetloading_t *loading);
 /**
- * Synchronous loader for chunk assets. Validates the DCF binary previously
+ * Synchronous loader for chunk assets. Locks the chunk's JSON descriptor
- * read by the async phase and populates the output assetchunkoutput_t with
+ * as a sub-asset, parses tiles/external mesh references/entity spawns/
- * tile data and model paths.
+ * area spawns, generates the terrain mesh directly from the tile grid,
 * and locks/waits for every referenced model (and the terrain's shared
 * tileset texture) to finish loading.
 *
 * @param loading Loading information for the asset being loaded.
 * @return Error code indicating success or failure of the load operation.
@@ -5,9 +5,5 @@
 target_sources(${DUSK_LIBRARY_TARGET_NAME}
  PUBLIC
-    uisettings.c
+    assetcutsceneloader.c
    uisettingsgeneral.c
    uisettingsinput.c
    uisettingsdisplay.c
    uisettingsaudio.c
 )
@@ -0,0 +1,225 @@
 /**
 * Copyright (c) 2026 Dominic Masters
 *
 * This software is released under the MIT License.
 * https://opensource.org/licenses/MIT
 */
 #include "assetcutsceneloader.h"
 #include "assert/assert.h"
 #include "util/memory.h"
 #include "util/string.h"
 #include "asset/loader/assetloading.h"
 #include "asset/loader/assetentry.h"
 #include "asset/loader/assetloader.h"
 #include "asset/asset.h"
 #include "rpg/cutscene/item/json/cutscenejsonpauseflags.h"
 errorret_t assetCutsceneParseItem(
  assetloading_t *loading,
  yyjson_val *itemObj,
  cutsceneitem_t *item,
  uint8_t *pool,
  size_t *poolOffset,
  const uint8_t index
 ) {
  if(!yyjson_is_obj(itemObj)) {
    assetLoaderErrorThrow(
      loading,
      "Cutscene item %u is not an object",
      (uint32_t)index
    );
  }
  const char_t *typeName = yyjson_get_str(yyjson_obj_get(itemObj, "type"));
  if(!cutsceneItemLookupType(typeName, &item->type)) {
    assetLoaderErrorThrow(
      loading,
      "Cutscene item %u: missing/unsupported item type %s",
      (uint32_t)index,
      typeName
    );
  }
  cutsceneitemloadcallback_t *load = CUTSCENE_ITEM_CALLBACKS[item->type].load;
  if(load == NULL) {
    assetLoaderErrorThrow(
      loading, "Cutscene item %u: unhandled item type %u", (uint32_t)index,
      (uint32_t)item->type
    );
  }
  errorret_t result = load(itemObj, item, pool, poolOffset);
  if(errorIsNotOk(result)) {
    loading->entry->state = ASSET_ENTRY_STATE_ERROR;
    errorChain(result);
  }
  errorOk();
 }
 size_t assetCutsceneComputePoolSize(yyjson_val *itemsArr) {
  size_t size = 0;
  yyjson_arr_iter iter = yyjson_arr_iter_with(itemsArr);
  yyjson_val *itemVal;
  while((itemVal = yyjson_arr_iter_next(&iter)) != NULL) {
    const char_t *typeName = yyjson_get_str(yyjson_obj_get(itemVal, "type"));
    cutsceneitemtype_t type;
    if(!cutsceneItemLookupType(typeName, &type)) continue;
    cutsceneitempoolsizecallback_t *poolSize =
      CUTSCENE_ITEM_CALLBACKS[type].poolSize;
    if(poolSize == NULL) continue;
    size = cutsceneJsonPoolAlign(size) + poolSize(itemVal);
  }
  return size;
 }
 void assetCutsceneFreeParsed(assetcutsceneoutput_t *out) {
  if(out->items != NULL) {
    memoryFree(out->items);
    out->items = NULL;
  }
  if(out->pool != NULL) {
    memoryFree(out->pool);
    out->pool = NULL;
  }
  if(out->doc != NULL) {
    yyjson_doc_free(out->doc);
    out->doc = NULL;
  }
 }
 errorret_t assetCutsceneLoaderAsync(assetloading_t *loading) {
  assertNotNull(loading, "Loading cannot be NULL");
  assertNotMainThread("Should be called from an async thread.");
  if(
    loading->loading.cutscene.state != ASSET_CUTSCENE_LOADING_STATE_READ_FILE
  ) {
    errorOk();
  }
  assertNull(loading->loading.cutscene.buffer, "Buffer already defined?");
  assetfile_t *file = &loading->loading.cutscene.file;
  assetLoaderErrorChain(loading,
    assetFileInit(file, loading->entry->name, NULL, NULL)
  );
  if(file->size > ASSET_CUTSCENE_FILE_SIZE_MAX) {
    assetLoaderErrorThrow(
      loading, "Cutscene JSON exceeds maximum allowed size"
    );
  }
  size_t fileSize = (size_t)file->size;
  uint8_t *buffer = memoryAllocate(fileSize);
  assetLoaderErrorChain(loading, assetFileOpen(file));
  assetLoaderErrorChain(loading, assetFileRead(file, buffer, fileSize));
  assertTrue(
    file->lastRead == file->size,
    "Failed to read entire cutscene file."
  );
  assetLoaderErrorChain(loading, assetFileClose(file));
  assetLoaderErrorChain(loading, assetFileDispose(file));
  loading->loading.cutscene.buffer = buffer;
  loading->loading.cutscene.size = fileSize;
  loading->loading.cutscene.state = ASSET_CUTSCENE_LOADING_STATE_PARSE;
  loading->entry->state = ASSET_ENTRY_STATE_PENDING_SYNC;
  errorOk();
 }
 errorret_t assetCutsceneLoaderSync(assetloading_t *loading) {
  assertNotNull(loading, "Loading cannot be NULL");
  assertTrue(loading->type == ASSET_LOADER_TYPE_CUTSCENE, "Invalid type.");
  assertIsMainThread("Must be called from the main thread.");
  if(loading->loading.cutscene.state == ASSET_CUTSCENE_LOADING_STATE_INITIAL) {
    loading->loading.cutscene.state = ASSET_CUTSCENE_LOADING_STATE_READ_FILE;
    loading->entry->state = ASSET_ENTRY_STATE_PENDING_ASYNC;
    errorOk();
  }
  assetcutsceneoutput_t *out = &loading->entry->data.cutscene;
  uint8_t *buffer = loading->loading.cutscene.buffer;
  assertNotNull(buffer, "Cutscene data should have been loaded by now.");
  size_t bufferSize = loading->loading.cutscene.size;
  yyjson_doc *doc = yyjson_read(
    (char *)buffer, bufferSize,
    YYJSON_READ_ALLOW_COMMENTS | YYJSON_READ_ALLOW_TRAILING_COMMAS
  );
  memoryFree(buffer);
  loading->loading.cutscene.buffer = NULL;
  if(doc == NULL) {
    assetLoaderErrorThrow(loading, "Failed to parse cutscene JSON");
  }
  out->doc = doc;
  yyjson_val *root = yyjson_doc_get_root(doc);
  yyjson_val *itemsArr = yyjson_obj_get(root, "items");
  if(!yyjson_is_arr(itemsArr)) {
    assetCutsceneFreeParsed(out);
    assetLoaderErrorThrow(loading, "Cutscene JSON is missing an 'items' array");
  }
  size_t itemCount = yyjson_arr_size(itemsArr);
  if(itemCount > UINT8_MAX) {
    assetCutsceneFreeParsed(out);
    assetLoaderErrorThrow(loading, "Cutscene has more than 255 items");
  }
  cutscenepause_t pause = CUTSCENE_PAUSE_DEFAULT;
  yyjson_val *pauseArr = yyjson_obj_get(root, "pause");
  if(yyjson_is_arr(pauseArr)) {
    if(!cutsceneJsonParsePauseFlags(pauseArr, &pause)) {
      assetCutsceneFreeParsed(out);
      assetLoaderErrorThrow(
        loading, "Cutscene JSON has an invalid 'pause' flag"
      );
    }
  }
  out->items = memoryAllocate(itemCount * sizeof(cutsceneitem_t));
  memoryZero(out->items, itemCount * sizeof(cutsceneitem_t));
  size_t poolSize = assetCutsceneComputePoolSize(itemsArr);
  out->pool = poolSize > 0 ? memoryAllocate(poolSize) : NULL;
  size_t poolOffset = 0;
  yyjson_arr_iter itemIter = yyjson_arr_iter_with(itemsArr);
  yyjson_val *itemVal;
  uint8_t index = 0;
  while((itemVal = yyjson_arr_iter_next(&itemIter)) != NULL) {
    errorret_t itemResult = assetCutsceneParseItem(
      loading, itemVal, &out->items[index], out->pool, &poolOffset, index
    );
    if(errorIsNotOk(itemResult)) {
      assetCutsceneFreeParsed(out);
      errorChain(itemResult);
    }
    index++;
  }
  out->cutscene.items = out->items;
  out->cutscene.itemCount = (uint8_t)itemCount;
  out->cutscene.pause = pause;
  out->cutscene.dataSize = 0;
  loading->entry->state = ASSET_ENTRY_STATE_LOADED;
  errorOk();
 }
 errorret_t assetCutsceneDispose(assetentry_t *entry) {
  assertNotNull(entry, "Entry cannot be NULL");
  assertTrue(entry->type == ASSET_LOADER_TYPE_CUTSCENE, "Invalid type.");
  assertIsMainThread("Must be called from the main thread.");
  assetCutsceneFreeParsed(&entry->data.cutscene);
  errorOk();
 }
@@ -0,0 +1,106 @@
 /**
 * Copyright (c) 2026 Dominic Masters
 *
 * This software is released under the MIT License.
 * https://opensource.org/licenses/MIT
 */
 #pragma once
 #include "asset/assetfile.h"
 #include "rpg/cutscene/cutscene.h"
 #include "rpg/cutscene/item/cutsceneitem.h"
 #include "rpg/cutscene/item/json/cutscenejsonpool.h"
 #include "yyjson.h"
 #define ASSET_CUTSCENE_FILE_SIZE_MAX (1024 * 64)
 typedef struct assetloading_s assetloading_t;
 typedef struct assetentry_s assetentry_t;
 typedef struct {
  void *nothing;
 } assetcutsceneloaderinput_t;
 typedef enum {
  ASSET_CUTSCENE_LOADING_STATE_INITIAL,
  ASSET_CUTSCENE_LOADING_STATE_READ_FILE,
  ASSET_CUTSCENE_LOADING_STATE_PARSE
 } assetcutsceneloadingstate_t;
 typedef struct {
  assetfile_t file;
  assetcutsceneloadingstate_t state;
  uint8_t *buffer;
  size_t size;
 } assetcutsceneloaderloading_t;
 typedef struct {
  cutscene_t cutscene;
  cutsceneitem_t *items;
  uint8_t *pool;
  yyjson_doc *doc;
 } assetcutsceneoutput_t;
 /**
 * Parses one cutscene item object into item, writing any pool-backed
 * array data (entityWalkTo positions, mapAreaWait areaIds) into pool at
 * *poolOffset and advancing it. Every field/enum name is validated as
 * real (untrusted, authored) file content - failures are real errors, not
 * asserts. Dispatches to the matching type's Load callback (see
 * CUTSCENE_ITEM_CALLBACKS in rpg/cutscene/item/cutsceneitem.h) - the
 * per-type parsing logic itself lives there now, colocated with that
 * type's runtime behavior.
 *
 * @param loading Loading information for the asset being loaded.
 * @param itemObj The item's JSON object.
 * @param item Destination item, already zeroed by the caller.
 * @param pool Base pointer of the entry's pool allocation (may be NULL if
 * assetCutsceneComputePoolSize returned 0).
 * @param poolOffset In/out cursor into pool.
 * @param index Index of this item within the cutscene, for error messages.
 * @return Error code indicating success or failure of the parse.
 */
 errorret_t assetCutsceneParseItem(
  assetloading_t *loading,
  yyjson_val *itemObj,
  cutsceneitem_t *item,
  uint8_t *pool,
  size_t *poolOffset,
  const uint8_t index
 );
 /**
 * Frees whatever of out->items/out->pool/out->doc is currently non-NULL
 * and clears them - shared by both the normal disposer and every parse
 * failure path's cleanup.
 *
 * @param out The output to free.
 */
 void assetCutsceneFreeParsed(assetcutsceneoutput_t *out);
 /**
 * Asynchronous loader for cutscene assets. Reads the raw JSONC file bytes
 * into the loading buffer so the sync phase can parse without blocking the
 * main thread on I/O.
 *
 * @param loading Loading information for the asset being loaded.
 * @return Error code indicating success or failure of the load operation.
 */
 errorret_t assetCutsceneLoaderAsync(assetloading_t *loading);
 /**
 * Synchronous loader for cutscene assets. Parses the JSONC previously read
 * by the async phase into a heap-allocated cutsceneitem_t array + pool.
 *
 * @param loading Loading information for the asset being loaded.
 * @return Error code indicating success or failure of the load operation.
 */
 errorret_t assetCutsceneLoaderSync(assetloading_t *loading);
 /**
 * Disposer for cutscene assets.
 *
 * @param entry Asset entry containing the cutscene data to dispose.
 * @return Error code indicating success or failure of the dispose operation.
 */
 errorret_t assetCutsceneDispose(assetentry_t *entry);
@@ -115,7 +115,8 @@ errorret_t assetModelLoaderSync(assetloading_t *loading) {
      assetUnlockEntry(jsonEntry);
      // Lock and load the mesh sub-asset.
-      assetentry_t *meshEntry = assetLock(meshName, ASSET_LOADER_TYPE_MESH, NULL);
+      assetentry_t *meshEntry =
        assetLock(meshName, ASSET_LOADER_TYPE_MESH, NULL);
      ret = assetRequireLoaded(meshEntry);
      if(errorIsNotOk(ret)) {
        assetUnlockEntry(meshEntry);
@@ -30,8 +30,8 @@ errorret_t assetLocaleLoaderAsync(assetloading_t *loading) {
  assetLoaderErrorChain(loading, assetFileOpen(&localeFile->file));
  char_t buffer[1024];
-  assetLoaderErrorChain(loading, assetLocaleGetString(
+  assetLoaderErrorChain(loading, assetLocaleGetHeader(
-    localeFile, "", 0, buffer, sizeof(buffer)
+    localeFile, buffer, sizeof(buffer)
  ));
  assetLoaderErrorChain(loading, assetLocaleParseHeader(
    localeFile, buffer, sizeof(buffer)
@@ -71,6 +71,12 @@ errorret_t assetLocaleDispose(assetentry_t *entry) {
  assertIsMainThread("Must be called from the main thread.");
  assetlocalefile_t *localeFile = &entry->data.locale;
  if(localeFile->cache != NULL) {
    memoryFree(localeFile->cache);
    localeFile->cache = NULL;
  }
  errorChain(assetFileClose(&localeFile->file));
  return assetFileDispose(&localeFile->file);
 }
@@ -470,7 +476,94 @@ errorret_t assetLocaleLineUnbuffer(
  errorOk();
 }
-errorret_t assetLocaleGetString(
+errorret_t assetLocaleCacheFind(
  assetlocalefile_t *file,
  const char_t *messageId,
  const int32_t pluralCount,
  char_t *stringBuffer,
  const size_t stringBufferSize,
  bool_t *outHit
 ) {
  assertNotNull(file, "Asset file cannot be NULL.");
  assertNotNull(messageId, "Message ID cannot be NULL.");
  assertNotNull(outHit, "outHit cannot be NULL.");
  assertStrLenMin(messageId, 1, "Message ID cannot be empty.");
  *outHit = false;
  if(file->cache == NULL) errorOk();
  assetlocalecache_t *cache = file->cache;
  for(uint8_t i = 0; i < ASSET_LOCALE_CACHE_COUNT; i++) {
    assetlocalecacheentry_t *entry = &cache->entries[i];
    if(entry->messageId[0] == '\0') break;// unused tail - nothing further
    if(entry->pluralCount != pluralCount) continue;
    if(!stringEquals(entry->messageId, messageId)) continue;
    // Move to the front of the LRU order (a no-op when already there).
    if(i > 0) {
      assetlocalecacheentry_t hit = *entry;
      memoryMove(
        &cache->entries[1], &cache->entries[0],
        i * sizeof(assetlocalecacheentry_t)
      );
      cache->entries[0] = hit;
    }
    size_t len = strlen(cache->entries[0].value);
    if(len >= stringBufferSize) errorThrow("String buffer overflow");
    memoryCopy(stringBuffer, cache->entries[0].value, len + 1);
    *outHit = true;
    errorOk();
  }
  errorOk();
 }
 void assetLocaleCacheInsert(
  assetlocalefile_t *file,
  const char_t *messageId,
  const int32_t pluralCount,
  const char_t *value
 ) {
  assertNotNull(file, "Asset file cannot be NULL.");
  assertNotNull(messageId, "Message ID cannot be NULL.");
  assertNotNull(value, "Value cannot be NULL.");
  assertStrLenMin(messageId, 1, "Message ID cannot be empty.");
  // Caching is a pure optimization - a message ID or value too long for a
  // fixed cache slot is just never cached, not an error.
  if(strlen(messageId) >= ASSET_LOCALE_CACHE_KEY_MAX) return;
  if(strlen(value) >= ASSET_LOCALE_CACHE_VALUE_MAX) return;
  if(file->cache == NULL) {
    file->cache =
      (assetlocalecache_t *)memoryAllocate(sizeof(assetlocalecache_t));
    memoryZero(file->cache, sizeof(assetlocalecache_t));
  }
  // Shift every entry down one slot, dropping the least-recently-used one
  // off the end, to make room for the new entry at the front. This assumes
  // messageId is never already present elsewhere in the cache, which holds
  // as long as callers only insert after a confirmed assetLocaleCacheFind
  // miss (a hit would have returned before reaching this point).
  memoryMove(
    &file->cache->entries[1], &file->cache->entries[0],
    (ASSET_LOCALE_CACHE_COUNT - 1) * sizeof(assetlocalecacheentry_t)
  );
  assetlocalecacheentry_t *entry = &file->cache->entries[0];
  stringCopy(entry->messageId, messageId, ASSET_LOCALE_CACHE_KEY_MAX);
  entry->pluralCount = pluralCount;
  stringCopy(entry->value, value, ASSET_LOCALE_CACHE_VALUE_MAX);
 }
 // Shared by assetLocaleGetString (external callers, messageId required
 // non-empty) and assetLocaleGetHeader (messageId "", the PO format's own
 // sentinel for its header entry - see assetLocaleGetHeader). Caching is
 // skipped entirely for an empty messageId: assetLocaleCacheFind/Insert
 // both reject one outright (same guard as assetLocaleGetString's own),
 // and it's a one-shot boot-time read anyway, not worth caching.
 errorret_t assetLocaleGetStringLookup(
  assetlocalefile_t *file,
  const char_t *messageId,
  const int32_t pluralCount,
@@ -482,6 +575,15 @@ errorret_t assetLocaleGetString(
  assertTrue(pluralCount >= 0, "Plural index cannot be negative.");
  assertNotNull(stringBuffer, "String buffer cannot be NULL.");
  assertTrue(stringBufferSize > 0, "String buffer size must be > 0");
  bool_t cacheHit = false;
  if(messageId[0] != '\0') {
    errorChain(assetLocaleCacheFind(
      file, messageId, pluralCount, stringBuffer, stringBufferSize, &cacheHit
    ));
    if(cacheHit) errorOk();
  }
  assetfilelinereader_t reader;
  bool_t msgidFound = false, msgidPluralFound = false, msgstrFound = false;
@@ -625,9 +727,38 @@ errorret_t assetLocaleGetString(
    errorThrow("Failed to find msgstr for message ID: %s", messageId);
  }
  if(messageId[0] != '\0') {
    assetLocaleCacheInsert(file, messageId, pluralCount, stringBuffer);
  }
  errorOk();
 }
 errorret_t assetLocaleGetString(
  assetlocalefile_t *file,
  const char_t *messageId,
  const int32_t pluralCount,
  char_t *stringBuffer,
  const size_t stringBufferSize
 ) {
  assertNotNull(messageId, "Message ID cannot be NULL.");
  assertStrLenMin(messageId, 1, "Message ID cannot be empty.");
  return assetLocaleGetStringLookup(
    file, messageId, pluralCount, stringBuffer, stringBufferSize
  );
 }
 errorret_t assetLocaleGetHeader(
  assetlocalefile_t *file,
  char_t *stringBuffer,
  const size_t stringBufferSize
 ) {
  return assetLocaleGetStringLookup(
    file, "", 0, stringBuffer, stringBufferSize
  );
 }
 errorret_t assetLocaleGetStringWithVA(
  assetlocalefile_t *file,
  const char_t *messageId,
@@ -70,6 +70,41 @@ typedef struct {
  };
 } assetlocalearg_t;
 /** Number of recently resolved strings @ref assetlocalecache_t remembers. */
 #define ASSET_LOCALE_CACHE_COUNT 128
 /** Max length (excluding null terminator) of a cacheable message ID. */
 #define ASSET_LOCALE_CACHE_KEY_MAX 64
 /** Max length (excluding null terminator) of a cacheable resolved string. */
 #define ASSET_LOCALE_CACHE_VALUE_MAX 256
 /** One (messageId, pluralCount) -> resolved string cache slot. */
 typedef struct {
  char_t messageId[ASSET_LOCALE_CACHE_KEY_MAX];
  int32_t pluralCount;
  char_t value[ASSET_LOCALE_CACHE_VALUE_MAX];
 } assetlocalecacheentry_t;
 /**
 * Fixed-size move-to-front LRU cache of recently resolved locale strings.
 * assetLocaleGetString() re-scans and re-decompresses the whole PO file on
 * every miss, which is expensive to repeat for strings a screen fetches
 * every time it opens (menu labels, etc) - this cache lets identical
 * (messageId, pluralCount) lookups skip that entirely.
 *
 * Lazily allocated on the first cache insert (see assetlocalefile_t.cache)
 * so locale entries that are never queried, or a file that's disposed
 * before anything is cached, never pay for it.
 */
 typedef struct {
  /**
   * Entries ordered most-recently-used first. An entry with
   * messageId[0] == '\0' (and every entry after it) is unused.
   */
  assetlocalecacheentry_t entries[ASSET_LOCALE_CACHE_COUNT];
 } assetlocalecache_t;
 /**
 * Runtime state for an open locale file.
 *
@@ -98,6 +133,16 @@ typedef struct {
  /** Form index used when no conditional clause matches. */
  uint8_t pluralDefaultIndex;
  /**
   * Recently resolved string cache, or NULL if nothing has been cached yet.
   * Heap-allocated rather than embedded because assetlocalefile_t lives
   * inside the shared assetloaderoutput_t union alongside every other
   * asset type - embedding a 128-entry cache there would size that union
   * (and therefore every one of the ASSET_ENTRY_COUNT_MAX asset slots,
   * regardless of what type of asset occupies it) up by the same amount.
   */
  assetlocalecache_t *cache;
 } assetlocalefile_t;
 /** Convenience alias - the loaded output type of a locale asset entry. */
@@ -204,14 +249,92 @@ errorret_t assetLocaleLineUnbuffer(
 );
 /**
- * Looks up a translated string by message ID from the open locale file.
+ * Searches a locale file's cache for a previously resolved
 * (messageId, pluralCount) pair.
 *
- * Rewinds the file and scans from the beginning on every call. For plural
+ * On a hit, copies the cached value into `stringBuffer` (erroring if it
- * entries (`msgid_plural`) the `pluralCount` is evaluated against the loaded
+ * doesn't fit, same contract as @ref assetLocaleGetString) and moves the
- * plural rules to select the correct `msgstr[N]` form.
+ * entry to the front of the cache's move-to-front LRU order. On a miss,
 * `stringBuffer` is left untouched.
 *
 * @param file  Locale file whose cache to search. Its cache may be NULL
 *              (nothing cached yet), which is treated as a miss.
 * @param messageId  Message ID to look up.
 * @param pluralCount  Plural count the original lookup used.
 * @param stringBuffer  Destination buffer, filled only on a hit.
 * @param stringBufferSize  Capacity of `stringBuffer` in bytes.
 * @param outHit  Set to true on a cache hit, false on a miss.
 * @return OK on success (hit or miss), error if a hit's cached value does
 *         not fit `stringBuffer`.
 */
 errorret_t assetLocaleCacheFind(
  assetlocalefile_t *file,
  const char_t *messageId,
  const int32_t pluralCount,
  char_t *stringBuffer,
  const size_t stringBufferSize,
  bool_t *outHit
 );
 /**
 * Records a resolved (messageId, pluralCount) -> value string at the front
 * of the cache's move-to-front LRU order, evicting the least-recently-used
 * entry if the cache is already full. Lazily allocates the cache (see
 * assetlocalefile_t.cache) on the first call.
 *
 * Caching is a pure optimization: if `messageId` or `value` is too long to
 * fit the cache's fixed-size slots, this silently does nothing rather than
 * erroring or growing the cache.
 *
 * @param file  Locale file whose cache to insert into.
 * @param messageId  Message ID that was looked up.
 * @param pluralCount  Plural count the lookup was made with.
 * @param value  Resolved string to cache.
 */
 void assetLocaleCacheInsert(
  assetlocalefile_t *file,
  const char_t *messageId,
  const int32_t pluralCount,
  const char_t *value
 );
 /**
 * Shared lookup core behind assetLocaleGetString and assetLocaleGetHeader:
 * checks the file's cache first (see @ref assetLocaleCacheFind; skipped
 * entirely for an empty messageId, since the cache rejects one), on a
 * miss rewinds the file and scans from the beginning, then caches the
 * result (see @ref assetLocaleCacheInsert, same empty-messageId skip)
 * before returning. For plural entries (`msgid_plural`) the
 * `pluralCount` is evaluated against the loaded plural rules to select
 * the correct `msgstr[N]` form.
 *
 * Unlike assetLocaleGetString, messageId may be `""` here (see
 * assetLocaleGetHeader) - this is the shared implementation both of
 * them delegate to, not a public entry point of its own in practice.
 *
 * @param file  Locale file to search. Must be open.
- * @param messageId  PO message ID to find (`""` retrieves the header entry).
+ * @param messageId  PO message ID to find, or `""` for the header entry.
 * @param pluralCount  Count used to select the plural form (ignored for
 *                     singular entries).
 * @param stringBuffer  Buffer to receive the translated string.
 * @param stringBufferSize  Capacity of `stringBuffer` in bytes.
 * @return OK on success, error if the message ID is not found or I/O fails.
 */
 errorret_t assetLocaleGetStringLookup(
  assetlocalefile_t *file,
  const char_t *messageId,
  const int32_t pluralCount,
  char_t *stringBuffer,
  const size_t stringBufferSize
 );
 /**
 * Looks up a translated string by message ID from the open locale file.
 * See @ref assetLocaleGetStringLookup for the lookup/caching mechanics.
 *
 * @param file  Locale file to search. Must be open.
 * @param messageId  PO message ID to find. Must be non-empty - use
 *                    @ref assetLocaleGetHeader to read the header entry.
 * @param pluralCount  Count used to select the plural form (ignored for
 *                     singular entries).
 * @param stringBuffer  Buffer to receive the translated string.
@@ -226,6 +349,27 @@ errorret_t assetLocaleGetString(
  const size_t stringBufferSize
 );
 /**
 * Reads the PO file's header entry (the `msgid ""` block every PO file
 * starts with, holding metadata like the plural-forms rule) - see @ref
 * assetLocaleParseHeader, its caller. A dedicated function rather than
 * calling assetLocaleGetString(file, "", ...) since messageId "" is a
 * PO-format-internal sentinel, not a real (untrusted) caller-supplied
 * message ID, so it doesn't go through assetLocaleGetString's normal
 * non-empty validation.
 *
 * @param file  Locale file to search. Must be open.
 * @param stringBuffer  Buffer to receive the raw header block.
 * @param stringBufferSize  Capacity of `stringBuffer` in bytes.
 * @return OK on success, error if the header entry is missing or I/O
 * fails.
 */
 errorret_t assetLocaleGetHeader(
  assetlocalefile_t *file,
  char_t *stringBuffer,
  const size_t stringBufferSize
 );
 /**
 * Looks up a translated string and formats it with a `printf`-style variadic
 * argument list.
@@ -0,0 +1,9 @@
 # Copyright (c) 2026 Dominic Masters
 #
 # This software is released under the MIT License.
 # https://opensource.org/licenses/MIT
 target_sources(${DUSK_LIBRARY_TARGET_NAME}
  PUBLIC
    assetmp3loader.c
 )
@@ -0,0 +1,255 @@
 /**
 * Copyright (c) 2026 Dominic Masters
 *
 * This software is released under the MIT License.
 * https://opensource.org/licenses/MIT
 */
 #include "assetmp3loader.h"
 #include "util/memory.h"
 #include "util/math.h"
 #include "assert/assert.h"
 #include "asset/loader/assetloading.h"
 #include "asset/loader/assetentry.h"
 // How far into the file (after any ID3v2 tag) assetMp3ParseHeader() will
 // search for the first valid MPEG frame sync. Real encoders write it
 // within the first handful of bytes; this is a generous sane upper bound
 // (matching assetwavloader.c's own approach to bounding a stack buffer)
 // rather than a real expectation of needing that much.
 #define ASSET_MP3_HEADER_SEARCH_MAX 8192
 // MPEG-1 Layer III bitrates (kbps), indexed by the header's 4-bit bitrate
 // index. Index 0 ("free format") and 15 (reserved) aren't supported.
 static const uint16_t ASSET_MP3_BITRATE_MPEG1_L3[16] = {
  0, 32, 40, 48, 56, 64, 80, 96, 112, 128, 160, 192, 224, 256, 320, 0
 };
 // MPEG-2/2.5 Layer III bitrates (kbps) - a different table from MPEG-1's.
 static const uint16_t ASSET_MP3_BITRATE_MPEG2_L3[16] = {
  0, 8, 16, 24, 32, 40, 48, 56, 64, 80, 96, 112, 128, 144, 160, 0
 };
 static const uint32_t ASSET_MP3_SAMPLE_RATE_MPEG1[4] = {
  44100, 48000, 32000, 0
 };
 static const uint32_t ASSET_MP3_SAMPLE_RATE_MPEG2[4] = {
  22050, 24000, 16000, 0
 };
 static const uint32_t ASSET_MP3_SAMPLE_RATE_MPEG25[4] = {
  11025, 12000, 8000, 0
 };
 errorret_t assetMp3LoaderAsync(assetloading_t *loading) {
  assertNotNull(loading, "Loading cannot be NULL");
  assertNotMainThread("Async loader should not be on main thread.");
  if(loading->loading.mp3.state != ASSET_MP3_LOADER_STATE_READ_HEADER) {
    errorOk();
  }
  assetmp3file_t *mp3File = &loading->entry->data.mp3;
  memoryZero(mp3File, sizeof(assetmp3file_t));
  assetfile_t file;
  assetLoaderErrorChain(loading, assetFileInit(
    &file, loading->entry->name, NULL, NULL
  ));
  assetLoaderErrorChain(loading, assetFileOpen(&file));
  assetLoaderErrorChain(loading, assetMp3ParseHeader(&file, mp3File));
  assetLoaderErrorChain(loading, assetFileClose(&file));
  assetLoaderErrorChain(loading, assetFileDispose(&file));
  loading->loading.mp3.state = ASSET_MP3_LOADER_STATE_DONE;
  loading->entry->state = ASSET_ENTRY_STATE_PENDING_SYNC;
  errorOk();
 }
 errorret_t assetMp3LoaderSync(assetloading_t *loading) {
  assertNotNull(loading, "Loading cannot be NULL");
  assertTrue(loading->type == ASSET_LOADER_TYPE_MP3, "Invalid type.");
  assertIsMainThread("Must be called from the main thread.");
  switch(loading->loading.mp3.state) {
    case ASSET_MP3_LOADER_STATE_INITIAL:
      loading->loading.mp3.state = ASSET_MP3_LOADER_STATE_READ_HEADER;
      loading->entry->state = ASSET_ENTRY_STATE_PENDING_ASYNC;
      errorOk();
      break;
    case ASSET_MP3_LOADER_STATE_DONE:
      break;
    default:
      errorOk();
  }
  loading->entry->state = ASSET_ENTRY_STATE_LOADED;
  errorOk();
 }
 errorret_t assetMp3Dispose(assetentry_t *entry) {
  assertNotNull(entry, "Asset entry cannot be NULL");
  assertTrue(entry->type == ASSET_LOADER_TYPE_MP3, "Invalid type.");
  assertIsMainThread("Must be called from the main thread.");
  errorOk();
 }
 errorret_t assetMp3ParseHeader(assetfile_t *file, assetmp3file_t *mp3File) {
  assertNotNull(file, "Asset file cannot be NULL.");
  assertNotNull(mp3File, "Mp3 file cannot be NULL.");
  memoryZero(mp3File, sizeof(assetmp3file_t));
  // Skip a leading ID3v2 tag if present: "ID3" + version(2) + flags(1) + a
  // 4-byte syncsafe (7 usable bits/byte) size covering everything after
  // this 10-byte header.
  uint8_t id3Header[10];
  errorChain(assetFileRead(file, id3Header, sizeof(id3Header)));
  size_t searchBase;
  if(memoryCompare(id3Header, "ID3", 3) == 0) {
    const uint32_t tagSize = (
      ((uint32_t) (id3Header[6] & 0x7F) << 21) |
      ((uint32_t) (id3Header[7] & 0x7F) << 14) |
      ((uint32_t) (id3Header[8] & 0x7F) << 7) |
      ((uint32_t) (id3Header[9] & 0x7F))
    );
    errorChain(assetFileRead(file, NULL, tagSize));
    searchBase = sizeof(id3Header) + tagSize;
  } else {
    // No ID3v2 tag - rewind the probe bytes just consumed so the frame
    // sync search below starts from the true beginning of the file.
    errorChain(assetFileRewind(file));
    searchBase = 0;
  }
  const size_t searchWindowSize = mathMin(
    (size_t) ASSET_MP3_HEADER_SEARCH_MAX,
    (size_t) file->size > searchBase ? (size_t) file->size - searchBase : 0
  );
  if(searchWindowSize < 4) {
    errorThrow(
      "MP3 file is too short to contain a frame header: %s", file->filename
    );
  }
  uint8_t *window = (uint8_t *) memoryAllocate(searchWindowSize);
  errorret_t readRet = assetFileRead(file, window, searchWindowSize);
  if(errorIsNotOk(readRet)) {
    memoryFree(window);
    errorChain(readRet);
  }
  bool_t found = false;
  size_t frameIndex = 0;
  for(size_t i = 0; i + 4 <= searchWindowSize; i++) {
    if(window[i] != 0xFF || (window[i + 1] & 0xE0) != 0xE0) continue;
    const uint8_t versionBits = (window[i + 1] >> 3) & 0x3;
    const uint8_t layerBits = (window[i + 1] >> 1) & 0x3;
    // reserved version, or not Layer III
    if(versionBits == 1 || layerBits != 1) continue;
    const uint8_t bitrateIndex = (window[i + 2] >> 4) & 0xF;
    const uint8_t sampleRateIndex = (window[i + 2] >> 2) & 0x3;
    if(
      bitrateIndex == 0 || bitrateIndex == 15 || sampleRateIndex == 3
    ) continue;
    const uint8_t channelMode = (window[i + 3] >> 6) & 0x3;
    const bool_t isMpeg1 = versionBits == 3;
    mp3File->bitrateKbps = isMpeg1
      ? ASSET_MP3_BITRATE_MPEG1_L3[bitrateIndex]
      : ASSET_MP3_BITRATE_MPEG2_L3[bitrateIndex];
    mp3File->sampleRate = isMpeg1
      ? ASSET_MP3_SAMPLE_RATE_MPEG1[sampleRateIndex]
      : (versionBits == 2
          ? ASSET_MP3_SAMPLE_RATE_MPEG2[sampleRateIndex]
          : ASSET_MP3_SAMPLE_RATE_MPEG25[sampleRateIndex]);
    mp3File->samplesPerFrame = isMpeg1 ? 1152 : 576;
    mp3File->channels = channelMode == 3 ? 1 : 2;
    // A Xing/Info header, if present, sits right after the side info -
    // whose size depends on MPEG version and channel mode - immediately
    // following the 4-byte header (plus a 2-byte CRC, if the protection
    // bit says one follows).
    const bool_t hasCrc = (window[i + 1] & 0x1) == 0;
    const size_t sideInfoSize = isMpeg1
      ? (mp3File->channels == 1 ? 17 : 32)
      : (mp3File->channels == 1 ? 9 : 17);
    const size_t xingOffset = i + 4 + (hasCrc ? 2 : 0) + sideInfoSize;
    if(
      xingOffset + 8 <= searchWindowSize &&
      (
        memoryCompare(window + xingOffset, "Xing", 4) == 0 ||
        memoryCompare(window + xingOffset, "Info", 4) == 0
      )
    ) {
      const uint8_t *flagsBytes = window + xingOffset + 4;
      const uint32_t flags = (
        ((uint32_t) flagsBytes[0] << 24) | ((uint32_t) flagsBytes[1] << 16) |
        ((uint32_t) flagsBytes[2] << 8) | (uint32_t) flagsBytes[3]
      );
      if((flags & 0x1) != 0 && xingOffset + 12 <= searchWindowSize) {
        const uint8_t *framesBytes = window + xingOffset + 8;
        const uint32_t xingFrameCount = (
          ((uint32_t) framesBytes[0] << 24) |
          ((uint32_t) framesBytes[1] << 16) |
          ((uint32_t) framesBytes[2] << 8) |
          (uint32_t) framesBytes[3]
        );
        // The Xing/Info header's frame count includes the header's own
        // frame (this one, at `i`) - which libmad (and sceMp3) will
        // attempt to decode like any other, but which doesn't contribute a
        // real decodable frame of audio the way every other one does.
        // Confirmed against a real LAME-encoded file: its Xing header
        // declared 40 frames, but decoding actually produced exactly 39
        // frames' worth of real PCM - without this -1, playback would
        // permanently stall one frame short of the declared total (audible
        // as "never loops"), since real decode output can never catch up
        // to an overstated total.
        if(xingFrameCount > 0) {
          mp3File->totalFrames =
            (size_t) (xingFrameCount - 1) * mp3File->samplesPerFrame;
        }
      }
    }
    frameIndex = i;
    found = true;
    break;
  }
  memoryFree(window);
  if(!found) {
    errorThrow(
      "MP3 file has no valid MPEG-1/2/2.5 Layer III frame within the first "
      "%u bytes: %s",
      (uint32_t) searchWindowSize, file->filename
    );
  }
  mp3File->dataOffset = searchBase + frameIndex;
  mp3File->dataSize = (size_t) file->size - mp3File->dataOffset;
  // No Xing/Info header found - estimate assuming constant bitrate (the
  // common case when one's genuinely absent; a real VBR file without one
  // is rare and will just get an approximate duration/loop point instead
  // of an exact one).
  if(mp3File->totalFrames == 0) {
    const float_t durationSeconds = (
      ((float_t) mp3File->dataSize * 8.0f) /
      ((float_t) mp3File->bitrateKbps * 1000.0f)
    );
    mp3File->totalFrames =
      (size_t) (durationSeconds * (float_t) mp3File->sampleRate);
  }
  errorOk();
 }
@@ -0,0 +1,113 @@
 /**
 * Copyright (c) 2026 Dominic Masters
 *
 * This software is released under the MIT License.
 * https://opensource.org/licenses/MIT
 */
 #pragma once
 #include "error/error.h"
 #include "asset/assetfile.h"
 typedef struct assetloading_s assetloading_t;
 typedef struct assetentry_s assetentry_t;
 typedef struct { void *nothing; } assetmp3loaderinput_t;
 typedef enum {
  ASSET_MP3_LOADER_STATE_INITIAL,
  ASSET_MP3_LOADER_STATE_READ_HEADER,
  ASSET_MP3_LOADER_STATE_DONE
 } assetmp3loaderstate_t;
 typedef struct {
  assetmp3loaderstate_t state;
 } assetmp3loaderloading_t;
 /**
 * Parsed metadata for an MP3 asset - deliberately just enough to configure
 * a decoder and know the clip's total length, not anything about its
 * actual compressed content (which is read/decoded on demand at playback
 * time - see audiostreammp3.c). Only MPEG-1/2/2.5 Layer III ("MP3" in the
 * everyday sense) is supported; Layers I/II are rejected.
 */
 typedef struct {
  uint32_t sampleRate;
  uint8_t channels;
  // 1152 for MPEG-1, 576 for MPEG-2/2.5 - how many PCM samples (per
  // channel) one compressed MPEG frame decodes to.
  uint16_t samplesPerFrame;
  // The first frame's bitrate, in kbps. Used only as a fallback duration
  // estimate (assuming CBR) when no Xing/Info header is found - see
  // assetMp3ParseHeader()'s own comment.
  uint32_t bitrateKbps;
  // Byte offset (from the start of the file) of the first real MPEG
  // frame, i.e. right after any leading ID3v2 tag.
  size_t dataOffset;
  // Bytes of compressed MPEG data, from dataOffset to the end of the file.
  size_t dataSize;
  // Decoded PCM frame count for the whole clip - exact if a Xing/Info
  // header was found (the common case for anything encoded with a modern
  // tool), otherwise estimated from bitrateKbps/dataSize assuming CBR (see
  // assetMp3ParseHeader()'s own comment) - unlike assetwavfile_t.dataSize,
  // MP3 has no header field that gives this directly.
  size_t totalFrames;
 } assetmp3file_t;
 typedef assetmp3file_t assetmp3output_t;
 /**
 * Async (background-thread) half of the MP3 loader - opens the asset file,
 * parses its header (see assetMp3ParseHeader()), and closes it again. Never
 * buffers the compressed MPEG data itself; that's read on demand at
 * playback time by audiostreammp3.c via its own independent file handle.
 *
 * @param loading The asset loading slot.
 * @return Error indicating success or failure.
 */
 errorret_t assetMp3LoaderAsync(assetloading_t *loading);
 /**
 * Sync (main-thread) half of the MP3 loader - a simple state machine that
 * schedules the async header parse and marks the entry loaded once it's
 * done, mirroring assetWavLoaderSync()'s shape exactly.
 *
 * @param loading The asset loading slot.
 * @return Error indicating success or failure.
 */
 errorret_t assetMp3LoaderSync(assetloading_t *loading);
 /**
 * Disposes an MP3 asset entry. A no-op - an assetmp3file_t owns no heap
 * allocations, and playback streams open their own independent file
 * handles (see audiostreammp3.c).
 *
 * @param entry The asset entry to dispose.
 * @return Error indicating success or failure.
 */
 errorret_t assetMp3Dispose(assetentry_t *entry);
 /**
 * Parses an MP3 file's metadata from an already-opened asset file
 * positioned at its very start: skips a leading ID3v2 tag if present,
 * scans forward for the first valid MPEG-1/2/2.5 Layer III frame header
 * (rejecting anything else - other layers, or no valid frame found within
 * a sane search window), and checks that frame for a Xing/Info header
 * (found in the vast majority of real-world MP3s, VBR or CBR) to get an
 * exact total-frame count; falls back to a CBR estimate from the first
 * frame's bitrate and the file's remaining size if absent.
 *
 * Never reads more than a bounded lookahead window into memory - the bulk
 * of the file (the actual compressed audio, following the parsed frame's
 * position) is left untouched, exactly like assetWavParseHeader().
 *
 * @param file Asset file to parse, positioned at offset 0.
 * @param mp3File Filled with the parsed metadata on success.
 * @return Error indicating success or failure.
 */
 errorret_t assetMp3ParseHeader(assetfile_t *file, assetmp3file_t *mp3File);
@@ -6,6 +6,5 @@
 # Sources
 target_sources(${DUSK_LIBRARY_TARGET_NAME}
  PUBLIC
-    savevita.c
+    assetwavloader.c
    savestreamvita.c
 )
@@ -0,0 +1,181 @@
 /**
 * Copyright (c) 2026 Dominic Masters
 *
 * This software is released under the MIT License.
 * https://opensource.org/licenses/MIT
 */
 #include "assetwavloader.h"
 #include "util/memory.h"
 #include "util/endian.h"
 #include "assert/assert.h"
 #include "asset/loader/assetloading.h"
 #include "asset/loader/assetentry.h"
 // "RIFF" + chunkSize + "WAVE", before any sub-chunks begin.
 #define ASSET_WAV_RIFF_HEADER_SIZE 12
 // A sub-chunk header is a 4-byte id followed by a 4-byte little-endian size.
 #define ASSET_WAV_CHUNK_HEADER_SIZE 8
 #define ASSET_WAV_FMT_CHUNK_SIZE_MIN 16
 // Sane upper bound for a stack buffer - real fmt chunks (PCM or otherwise)
 // never come close to this; anything bigger is treated as malformed.
 #define ASSET_WAV_FMT_CHUNK_SIZE_MAX 64
 errorret_t assetWavLoaderAsync(assetloading_t *loading) {
  assertNotNull(loading, "Loading cannot be NULL");
  assertNotMainThread("Async loader should not be on main thread.");
  if(loading->loading.wav.state != ASSET_WAV_LOADER_STATE_READ_HEADER) {
    errorOk();
  }
  assetwavfile_t *wavFile = &loading->entry->data.wav;
  memoryZero(wavFile, sizeof(assetwavfile_t));
  assetfile_t file;
  assetLoaderErrorChain(loading, assetFileInit(
    &file, loading->entry->name, NULL, NULL
  ));
  assetLoaderErrorChain(loading, assetFileOpen(&file));
  assetLoaderErrorChain(loading, assetWavParseHeader(&file, wavFile));
  assetLoaderErrorChain(loading, assetFileClose(&file));
  assetLoaderErrorChain(loading, assetFileDispose(&file));
  loading->loading.wav.state = ASSET_WAV_LOADER_STATE_DONE;
  loading->entry->state = ASSET_ENTRY_STATE_PENDING_SYNC;
  errorOk();
 }
 errorret_t assetWavLoaderSync(assetloading_t *loading) {
  assertNotNull(loading, "Loading cannot be NULL");
  assertTrue(loading->type == ASSET_LOADER_TYPE_WAV, "Invalid type.");
  assertIsMainThread("Must be called from the main thread.");
  switch(loading->loading.wav.state) {
    case ASSET_WAV_LOADER_STATE_INITIAL:
      loading->loading.wav.state = ASSET_WAV_LOADER_STATE_READ_HEADER;
      loading->entry->state = ASSET_ENTRY_STATE_PENDING_ASYNC;
      errorOk();
      break;
    case ASSET_WAV_LOADER_STATE_DONE:
      break;
    default:
      errorOk();
  }
  loading->entry->state = ASSET_ENTRY_STATE_LOADED;
  errorOk();
 }
 errorret_t assetWavDispose(assetentry_t *entry) {
  assertNotNull(entry, "Asset entry cannot be NULL");
  assertTrue(entry->type == ASSET_LOADER_TYPE_WAV, "Invalid type.");
  assertIsMainThread("Must be called from the main thread.");
  errorOk();
 }
 errorret_t assetWavParseHeader(
  assetfile_t *file,
  assetwavfile_t *wavFile
 ) {
  assertNotNull(file, "Asset file cannot be NULL.");
  assertNotNull(wavFile, "Wav file cannot be NULL.");
  uint8_t riffHeader[ASSET_WAV_RIFF_HEADER_SIZE];
  errorChain(assetFileRead(file, riffHeader, sizeof(riffHeader)));
  if(memoryCompare(riffHeader, "RIFF", 4) != 0) {
    errorThrow("WAV file has an invalid RIFF header: %s", file->filename);
  }
  if(memoryCompare(riffHeader + 8, "WAVE", 4) != 0) {
    errorThrow("WAV file has an invalid WAVE header: %s", file->filename);
  }
  bool_t foundFormat = false;
  bool_t foundData = false;
  uint16_t audioFormat = 0;
  // Walk the chunk list, reading only chunk headers (and the small "fmt "
  // body) - every other chunk, "data"'s sample bytes included, is skipped
  // via a NULL-buffer read rather than buffered into memory. Stops as soon
  // as "data" is found; nothing after it matters here.
  while(!foundData && (size_t) file->position < (size_t) file->size) {
    uint8_t chunkHeader[ASSET_WAV_CHUNK_HEADER_SIZE];
    errorChain(assetFileRead(file, chunkHeader, sizeof(chunkHeader)));
    uint32_t chunkSizeLE;
    memoryCopy(&chunkSizeLE, chunkHeader + 4, sizeof(chunkSizeLE));
    const uint32_t chunkSize = endianLittleToHost32(chunkSizeLE);
    // Chunks are padded to an even total size - the pad byte (if any)
    // isn't included in chunkSize but still needs to be skipped over.
    const uint32_t chunkSizePadded = chunkSize + (chunkSize % 2);
    if(memoryCompare(chunkHeader, "fmt ", 4) == 0) {
      if(
        chunkSize < ASSET_WAV_FMT_CHUNK_SIZE_MIN ||
        chunkSize > ASSET_WAV_FMT_CHUNK_SIZE_MAX
      ) {
        errorThrow("WAV 'fmt ' chunk has an unsupported size: %u", chunkSize);
      }
      uint8_t fmtBuffer[ASSET_WAV_FMT_CHUNK_SIZE_MAX];
      errorChain(assetFileRead(file, fmtBuffer, chunkSize));
      if(chunkSize % 2 != 0) {
        errorChain(assetFileRead(file, NULL, 1));
      }
      uint16_t u16;
      uint32_t u32;
      memoryCopy(&u16, fmtBuffer + 0, sizeof(u16));
      audioFormat = endianLittleToHost16(u16);
      memoryCopy(&u16, fmtBuffer + 2, sizeof(u16));
      wavFile->channels = (uint8_t) endianLittleToHost16(u16);
      memoryCopy(&u32, fmtBuffer + 4, sizeof(u32));
      wavFile->sampleRate = endianLittleToHost32(u32);
      memoryCopy(&u16, fmtBuffer + 14, sizeof(u16));
      wavFile->bitsPerSample = (uint8_t) endianLittleToHost16(u16);
      foundFormat = true;
    } else if(memoryCompare(chunkHeader, "data", 4) == 0) {
      wavFile->dataOffset = (size_t) file->position;
      wavFile->dataSize = chunkSize;
      foundData = true;
    } else {
      errorChain(assetFileRead(file, NULL, chunkSizePadded));
    }
  }
  if(!foundFormat) {
    errorThrow("WAV file is missing its 'fmt ' chunk: %s", file->filename);
  }
  if(!foundData) {
    errorThrow("WAV file is missing its 'data' chunk: %s", file->filename);
  }
  if(audioFormat != 1) {
    errorThrow(
      "Unsupported WAV audio format: %u (only PCM is supported): %s",
      audioFormat, file->filename
    );
  }
  if(wavFile->bitsPerSample != 16 && wavFile->bitsPerSample != 24) {
    errorThrow(
      "Unsupported WAV bits per sample: %u (only 16/24-bit is supported): %s",
      wavFile->bitsPerSample, file->filename
    );
  }
  if(wavFile->channels == 0) {
    errorThrow("WAV file declares 0 channels: %s", file->filename);
  }
  errorOk();
 }
@@ -0,0 +1,117 @@
 /**
 * Copyright (c) 2026 Dominic Masters
 *
 * This software is released under the MIT License.
 * https://opensource.org/licenses/MIT
 */
 #pragma once
 #include "asset/assetfile.h"
 typedef struct assetloading_s assetloading_t;
 typedef struct assetentry_s assetentry_t;
 /** Input passed to the wav loader - currently unused. */
 typedef struct { void *nothing; } assetwavloaderinput_t;
 typedef enum {
  ASSET_WAV_LOADER_STATE_INITIAL,
  ASSET_WAV_LOADER_STATE_READ_HEADER,
  ASSET_WAV_LOADER_STATE_DONE
 } assetwavloaderstate_t;
 /** Per-slot scratch data used while the wav file is loading. */
 typedef struct {
  assetwavloaderstate_t state;
 } assetwavloaderloading_t;
 /**
 * Parsed metadata for a WAV asset - only the RIFF/WAVE/fmt/data chunk
 * headers are ever read; the PCM sample data itself is never loaded here
 * (see @ref assetWavParseHeader). Playback reads sample data directly
 * from the archive on demand instead - see audiostreampcm.h.
 */
 typedef struct {
  /** Sample rate of the PCM data, in Hz. */
  uint32_t sampleRate;
  /** Number of interleaved channels in the PCM data. */
  uint8_t channels;
  /**
   * Bits per sample of the *source* file data - 16 or 24 (see
   * assetWavParseHeader). Playback always reads 16-bit samples out via
   * audioStreamPcmRead() regardless of this - a 24-bit source is
   * truncated to 16-bit there, since none of this project's audio
   * backends (PSP/Dolphin hardware, SDL2 on Linux) accept anything wider.
   */
  uint8_t bitsPerSample;
  /** Byte offset from the start of the file to the first PCM sample. */
  size_t dataOffset;
  /** Size of the PCM data, in bytes. */
  size_t dataSize;
 } assetwavfile_t;
 /** Convenience alias - the loaded output type of a wav asset entry. */
 typedef assetwavfile_t assetwavoutput_t;
 /**
 * Asynchronous loader callback. Opens the WAV file and reads just enough of
 * it to locate and parse the `fmt ` chunk and locate (not read) the `data`
 * chunk - see @ref assetWavParseHeader. All I/O happens here so the main
 * thread is not blocked. Sets entry state to `ASSET_ENTRY_STATE_PENDING_SYNC`
 * on success or `ASSET_ENTRY_STATE_ERROR` on failure.
 *
 * @param loading The loading slot for this asset entry.
 * @return OK on success, error otherwise.
 */
 errorret_t assetWavLoaderAsync(assetloading_t *loading);
 /**
 * Synchronous loader callback. Confirms the async phase completed and marks
 * the entry as `ASSET_ENTRY_STATE_LOADED`.
 *
 * @param loading The loading slot for this asset entry.
 * @return OK on success, error otherwise.
 */
 errorret_t assetWavLoaderSync(assetloading_t *loading);
 /**
 * Dispose callback. The wav asset owns no allocations of its own (its data
 * chunk is read directly from the archive by whichever streams are playing
 * it, each through their own handle - see audiostreampcm.h), so this is
 * currently a no-op beyond the standard asserts.
 *
 * @param entry The asset entry to dispose.
 * @return OK on success, error otherwise.
 */
 errorret_t assetWavDispose(assetentry_t *entry);
 /**
 * Parses a RIFF/WAVE file's chunk structure from an already-open asset
 * file, reading only chunk headers (and the small `fmt ` chunk body) -
 * every other chunk, including `data`'s actual sample bytes, is skipped
 * over via `assetFileRead(file, NULL, size)` rather than read into memory,
 * so this never buffers the (potentially large) PCM payload.
 *
 * Stops as soon as the `data` chunk header is found, recording its file
 * offset and declared size in `wavFile` without reading any of its bytes -
 * the file is left positioned at the start of the PCM data.
 *
 * Only PCM (audio format 1), 16- or 24-bit-per-sample WAV data is
 * supported - see audiostreampcm.h's audioStreamPcmRead() for how a
 * 24-bit source gets truncated to the 16-bit output every platform
 * backend expects. Requires the `fmt ` chunk to appear before `data`, per
 * the WAV spec's recommended ordering.
 *
 * @param file An open asset file, positioned at the start of the WAV data.
 * @param wavFile Struct whose fields will be filled in.
 * @return OK on success, error if the file is malformed or an unsupported
 *         format.
 */
 errorret_t assetWavParseHeader(
  assetfile_t *file,
  assetwavfile_t *wavFile
 );
@@ -0,0 +1,14 @@
 # Copyright (c) 2026 Dominic Masters
 # 
 # This software is released under the MIT License.
 # https://opensource.org/licenses/MIT
 # Sources
 target_sources(${DUSK_LIBRARY_TARGET_NAME}
  PUBLIC
    audio.c
 )
 # Subdirs
 add_subdirectory(mixer)
 add_subdirectory(stream)
@@ -0,0 +1,73 @@
 /**
 * Copyright (c) 2026 Dominic Masters
 * 
 * This software is released under the MIT License.
 * https://opensource.org/licenses/MIT
 */
 #include "audio.h"
 #include "audio/mixer/audiomixer.h"
 #include "util/memory.h"
 #include "assert/assert.h"
 audio_t AUDIO;
 errorret_t audioInit() {
  memoryZero(&AUDIO, sizeof(audio_t));
  errorChain(audioPlatformInit());
  errorChain(audioMixerInit());
  errorOk();
 }
 audiostream_t * audioAquireStream(assetentry_t *asset) {
  assertNotNull(asset, "Asset cannot be NULL.");
  // Same check audioStreamInit() makes - see its own comment on why this
  // is an assert (a programmer error, not untrusted data). Checking here
  // too catches the mistake as early as possible, before any stream slot
  // is handed out for it.
  assertTrue(
    audioStreamTypeForAssetType(asset->type) != AUDIO_STREAM_TYPE_NULL,
    "Unsupported asset type for an audio stream."
  );
  for(uint8_t i = 0; i < AUDIO_STREAMS_MAX; i++) {
    audiostream_t *stream = &AUDIO.streams[i];
    if(stream->type == AUDIO_STREAM_TYPE_NULL) {
      return stream;
    }
  }
  return NULL;
 }
 errorret_t audioUpdateEarly() {
  errorChain(audioPlatformUpdate());
  errorChain(audioMixerUpdateEarly());
  for(uint8_t i = 0; i < AUDIO_STREAMS_MAX; i++) {
    audiostream_t *stream = &AUDIO.streams[i];
    errorChain(audioStreamUpdate(stream));
  }
  errorOk();
 }
 errorret_t audioUpdateLate() {
  errorChain(audioMixerUpdateLate());
  errorOk();
 }
 errorret_t audioDispose() {
  for(uint8_t i = 0; i < AUDIO_STREAMS_MAX; i++) {
    audiostream_t *stream = &AUDIO.streams[i];
    errorChain(audioStreamDispose(stream));
  }
  errorChain(audioMixerDispose());
  errorChain(audioPlatformDispose());
  errorOk();
 }
@@ -0,0 +1,77 @@
 /**
 * Copyright (c) 2026 Dominic Masters
 *
 * This software is released under the MIT License.
 * https://opensource.org/licenses/MIT
 */
 #pragma once
 #include "dusk.h"
 #include "audio/stream/audiostream.h"
 #include "audio/audioplatform.h"
 #ifndef audioPlatformInit
  #error "audioPlatformInit is not defined"
 #endif
 #ifndef audioPlatformUpdate
  #error "audioPlatformUpdate is not defined"
 #endif
 #ifndef audioPlatformDispose
  #error "audioPlatformDispose is not defined"
 #endif
 typedef struct {
  audiostream_t streams[AUDIO_STREAMS_MAX];
 } audio_t;
 extern audio_t AUDIO;
 /**
 * Initializes the audio subsystem.
 *
 * @return Error indicating success or failure of the operation.
 */
 errorret_t audioInit();
 /**
 * Aquires an available audio stream for playing the given asset. Can return
 * NULL if there is no available stream slot.
 *
 * The returned stream is not yet configured to play `asset` - call
 * audioStreamInit(stream, asset) next.
 *
 * @param asset The asset the caller intends to play - validated eagerly so
 *              an unsupported asset type is caught here rather than only
 *              once audioStreamInit() is called.
 * @return Pointer to an available audio stream, or NULL if none are free.
 */
 audiostream_t * audioAquireStream(assetentry_t *asset);
 /**
 * Updates the audio subsystem, updating every active stream. Should be
 * called once per frame, before rendering - keeps stream buffering/decode
 * work off the render thread's critical path (see duskmad's MP3 decode
 * ring for why this matters).
 *
 * @return Error indicating success or failure of the operation.
 */
 errorret_t audioUpdateEarly();
 /**
 * Updates the audio subsystem's end-of-frame work - currently just starting
 * whatever the audio mixer queued this frame (see
 * audioMixerUpdateLate()'s own comment). Should be called once per frame,
 * after rendering.
 *
 * @return Error indicating success or failure of the operation.
 */
 errorret_t audioUpdateLate();
 /**
 * Disposes the audio subsystem, stopping and disposing every active stream.
 *
 * @return Error indicating success or failure of the operation.
 */
 errorret_t audioDispose();
@@ -0,0 +1,11 @@
 # Copyright (c) 2026 Dominic Masters
 # 
 # This software is released under the MIT License.
 # https://opensource.org/licenses/MIT
 # Sources
 target_sources(${DUSK_LIBRARY_TARGET_NAME}
  PUBLIC
    audiomixer.c
    audiomixerchannel.c
 )
@@ -0,0 +1,199 @@
 /**
 * Copyright (c) 2026 Dominic Masters
 *
 * This software is released under the MIT License.
 * https://opensource.org/licenses/MIT
 */
 #include "audiomixer.h"
 #include "audio/stream/audiostream.h"
 #include "util/memory.h"
 #include "util/string.h"
 #include "assert/assert.h"
 audiomixer_t AUDIO_MIXER;
 errorret_t audioMixerInit() {
  memoryZero(&AUDIO_MIXER, sizeof(audiomixer_t));
  audiomixerchannel_t channel = 0;
  while(channel < AUDIO_MIXER_CHANNEL_COUNT) {
    AUDIO_MIXER.channels[channel].fade = 1.0f;
    // -1 means "no fade in progress" - see its own comment; zero-init
    // would otherwise look like an active fade at time 0.
    AUDIO_MIXER.channels[channel].fadeTime = -1.0f;
    channel++;
  }
  errorOk();
 }
 errorret_t audioMixerUpdateEarly() {
  audiomixerchannel_t channel = 0;
  while(channel < AUDIO_MIXER_CHANNEL_COUNT) {
    // One channel's error (e.g. a failed asset load) must not stop every
    // other channel from being updated this frame - caught and logged
    // rather than propagated, same as audioStream*IsFinished()'s own
    // per-stream error handling.
    errorret_t ret = audioMixerChannelUpdateEarly(
      channel, &AUDIO_MIXER.channels[channel]
    );
    if(errorIsNotOk(ret)) errorCatch(errorPrint(ret));
    channel++;
  }
  errorOk();
 }
 errorret_t audioMixerUpdateLate() {
  audiomixerchannel_t channel = 0;
  while(channel < AUDIO_MIXER_CHANNEL_COUNT) {
    errorret_t ret =
      audioMixerChannelUpdateLate(&AUDIO_MIXER.channels[channel]);
    if(errorIsNotOk(ret)) errorCatch(errorPrint(ret));
    channel++;
  }
  errorOk();
 }
 void audioMixerPlay(
  const char_t *file,
  const audiomixerchannel_t channel,
  const float_t volume,
  const float_t pan
 ) {
  audioMixerQueuePlay(file, channel, volume, pan, false, 0, -1.0f, 0.0f);
 }
 void audioMixerPlayLooped(
  const char_t *file,
  const audiomixerchannel_t channel,
  const float_t volume,
  const float_t pan,
  const uint8_t loopCount,
  const float_t loopStart,
  const float_t loopTo
 ) {
  audioMixerQueuePlay(
    file, channel, volume, pan, true, loopCount, loopStart, loopTo
  );
 }
 void audioMixerQueuePlay(
  const char_t *file,
  const audiomixerchannel_t channel,
  const float_t volume,
  const float_t pan,
  const bool_t looping,
  const uint8_t loopCount,
  const float_t loopStart,
  const float_t loopTo
 ) {
  assertStrLenMin(file, 1, "File is required, to stop use audioMixerStop");
  assertTrue(channel < AUDIO_MIXER_CHANNEL_COUNT, "Channel is out of range");
  assertTrue(volume > 0.0f && volume <= 1.0f, "Volume is out of range");
  assertTrue(
    pan >= AUDIO_STREAM_LEFT && pan <= AUDIO_STREAM_RIGHT,
    "Pan is out of range"
  );
  assertTrue(
    !looping || loopStart < 0.0f || loopTo < loopStart,
    "Loop points incorrect"
  );
  audiomixercommand_t *command = &AUDIO_MIXER.channels[channel].pending;
  command->command = AUDIO_MIXER_COMMAND_PLAY;
  stringCopy(command->file, file, AUDIO_PATH_MAX);
  command->volume = volume;
  command->pan = pan;
  command->looping = looping;
  command->loopCount = loopCount;
  command->loopStart = loopStart;
  command->loopTo = loopTo;
 }
 void audioMixerStop(const audiomixerchannel_t channel) {
  assertTrue(channel < AUDIO_MIXER_CHANNEL_COUNT, "Channel is out of range");
  AUDIO_MIXER.channels[channel].pending.command = AUDIO_MIXER_COMMAND_STOP;
 }
 void audioMixerPause(const audiomixerchannel_t channel) {
  assertTrue(channel < AUDIO_MIXER_CHANNEL_COUNT, "Channel is out of range");
  audiostream_t *stream = AUDIO_MIXER.channels[channel].stream;
  if(stream != NULL) audioStreamPause(stream);
 }
 void audioMixerResume(const audiomixerchannel_t channel) {
  assertTrue(channel < AUDIO_MIXER_CHANNEL_COUNT, "Channel is out of range");
  audiostream_t *stream = AUDIO_MIXER.channels[channel].stream;
  if(stream != NULL) audioStreamPlay(stream);
 }
 void audioMixerSetPan(const audiomixerchannel_t channel, const float_t pan) {
  assertTrue(channel < AUDIO_MIXER_CHANNEL_COUNT, "Channel is out of range");
  assertTrue(
    pan >= AUDIO_STREAM_LEFT && pan <= AUDIO_STREAM_RIGHT,
    "Pan is out of range"
  );
  audiostream_t *stream = AUDIO_MIXER.channels[channel].stream;
  if(stream != NULL) audioStreamSetDirectionality(stream, pan);
 }
 void audioMixerSetLoop(
  const audiomixerchannel_t channel,
  const bool_t looping,
  const uint8_t loopCount,
  const float_t loopStart,
  const float_t loopTo
 ) {
  assertTrue(channel < AUDIO_MIXER_CHANNEL_COUNT, "Channel is out of range");
  assertTrue(
    !looping || loopStart < 0.0f || loopTo < loopStart,
    "Loop points incorrect"
  );
  audiostream_t *stream = AUDIO_MIXER.channels[channel].stream;
  if(stream == NULL) return;
  audioStreamSetLooping(stream, looping);
  if(looping) {
    audioStreamSetLoopPoints(stream, loopStart, loopTo);
    audioStreamSetLoopLimit(stream, loopCount);
  }
 }
 void audioMixerFadeTo(
  const audiomixerchannel_t channel,
  const float_t from,
  const float_t to,
  const float_t duration,
  const easingtype_t easing
 ) {
  assertTrue(channel < AUDIO_MIXER_CHANNEL_COUNT, "Channel is out of range");
  audioMixerChannelFadeTo(
    &AUDIO_MIXER.channels[channel], from, to, duration, easing
  );
 }
 bool_t audioMixerIsFading(const audiomixerchannel_t channel) {
  assertTrue(channel < AUDIO_MIXER_CHANNEL_COUNT, "Channel is out of range");
  return audioMixerChannelIsFading(&AUDIO_MIXER.channels[channel]);
 }
 errorret_t audioMixerDispose() {
  audiomixerchannel_t channel = 0;
  while(channel < AUDIO_MIXER_CHANNEL_COUNT) {
    errorChain(audioMixerChannelStopStream(&AUDIO_MIXER.channels[channel]));
    channel++;
  }
  errorOk();
 }
@@ -0,0 +1,204 @@
 /**
 * Copyright (c) 2026 Dominic Masters
 *
 * This software is released under the MIT License.
 * https://opensource.org/licenses/MIT
 */
 #pragma once
 #include "audio/mixer/audiomixerchannel.h"
 typedef struct {
  audiomixerchannelstate_t channels[AUDIO_MIXER_CHANNEL_COUNT];
 } audiomixer_t;
 extern audiomixer_t AUDIO_MIXER;
 /**
 * Initializes the audio mixer.
 */
 errorret_t audioMixerInit();
 /**
 * Updates the audio mixer, called before rendering (the start of the
 * frame) - see audioMixerChannelUpdateEarly()'s own comment, run for every
 * channel.
 */
 errorret_t audioMixerUpdateEarly();
 /**
 * Updates the audio mixer, called at the end of each frame - see
 * audioMixerChannelUpdateLate()'s own comment, run for every channel.
 */
 errorret_t audioMixerUpdateLate();
 /**
 * Same as audioMixerPlayLooped() but with no looping.
 *
 * @param file File to be played.
 * @param channel Channel you want to play this sound on.
 * @param volume Volume of the sound, from 0.0 (silent) to 1.0 (loudest).
 * @param pan Stereo panning of the sound, from AUDIO_STREAM_LEFT to
 *            AUDIO_STREAM_RIGHT.
 */
 void audioMixerPlay(
  const char_t *file,
  const audiomixerchannel_t channel,
  const float_t volume,
  const float_t pan
 );
 /**
 * Queues a sound to be played on the next audio mixer update, which occurs at
 * the end of each frame.
 *
 * Mixer channels can only hold one voice (audio stream) at a time. If you try
 * to queue multiple sounds on the same channel only the last one will be played
 * and will stop any actively playing on that channel currently.
 *
 * Volume is also mixed based on the channel, so supplying volume 1.0 is then
 * multiplied by the channel's volume, e.g. 0.5*1.0 = 0.5.
 *
 * @param file File to be played.
 * @param channel Channel you want to play this sound on.
 * @param volume Volume of the sound, from 0.0 (silent) to 1.0 (loudest).
 * @param pan Stereo panning of the sound, from AUDIO_STREAM_LEFT to
 *            AUDIO_STREAM_RIGHT.
 * @param loopCount How many times to loop the sound, 0 for infinite looping.
 * @param loopStart Where the loop segment ends, in seconds, or -1 to loop
 *                   the whole stream (the default).
 * @param loopTo Where the loop segment starts, in seconds.
 */
 void audioMixerPlayLooped(
  const char_t *file,
  const audiomixerchannel_t channel,
  const float_t volume,
  const float_t pan,
  const uint8_t loopCount,
  const float_t loopStart,
  const float_t loopTo
 );
 /**
 * Shared implementation behind audioMixerPlay()/audioMixerPlayLooped() -
 * queues an AUDIO_MIXER_COMMAND_PLAY for the given channel, to be loaded at
 * the end of this frame and started at the start of the next (see
 * audioMixerUpdateLate()/audioMixerUpdateEarly()).
 *
 * @param file File to be played.
 * @param channel Channel you want to play this sound on.
 * @param volume Volume of the sound, from 0.0 (silent) to 1.0 (loudest).
 * @param pan Stereo panning of the sound, from AUDIO_STREAM_LEFT to
 *            AUDIO_STREAM_RIGHT.
 * @param looping Whether the stream should loop once it finishes.
 * @param loopCount How many times to loop the sound, 0 for infinite looping.
 *                   Ignored unless looping is true.
 * @param loopStart Where the loop segment ends, in seconds, or -1 to loop
 *                   the whole stream. Ignored unless looping is true.
 * @param loopTo Where the loop segment starts, in seconds. Ignored unless
 *                looping is true.
 */
 void audioMixerQueuePlay(
  const char_t *file,
  const audiomixerchannel_t channel,
  const float_t volume,
  const float_t pan,
  const bool_t looping,
  const uint8_t loopCount,
  const float_t loopStart,
  const float_t loopTo
 );
 /**
 * Stops playing sound on the given channel.
 *
 * @param channel Channel to stop.
 */
 void audioMixerStop(const audiomixerchannel_t channel);
 /**
 * Pauses the given channel's currently playing stream, if any - a safe
 * no-op if the channel isn't playing anything. Playback position is
 * retained, so audioMixerResume() continues from the same point.
 *
 * @param channel Channel to pause.
 */
 void audioMixerPause(const audiomixerchannel_t channel);
 /**
 * Resumes the given channel's currently paused stream, if any - a safe
 * no-op if the channel isn't playing anything.
 *
 * @param channel Channel to resume.
 */
 void audioMixerResume(const audiomixerchannel_t channel);
 /**
 * Sets the stereo panning of the given channel's currently playing stream,
 * if any - a safe no-op if the channel isn't playing anything. Only
 * affects what's playing right now; a later audioMixerPlay()/
 * audioMixerPlayLooped() call on this channel uses its own `pan` argument
 * instead.
 *
 * @param channel Channel to update.
 * @param pan Stereo panning, from AUDIO_STREAM_LEFT to AUDIO_STREAM_RIGHT.
 */
 void audioMixerSetPan(const audiomixerchannel_t channel, const float_t pan);
 /**
 * Sets the looping behaviour of the given channel's currently playing
 * stream, if any - a safe no-op if the channel isn't playing anything.
 * Only affects what's playing right now; a later audioMixerPlay()/
 * audioMixerPlayLooped() call on this channel uses its own loop arguments
 * instead.
 *
 * @param channel Channel to update.
 * @param looping Whether the stream should loop.
 * @param loopCount How many times to loop, 0 for infinite. Ignored unless
 *                   looping is true.
 * @param loopStart Where the loop segment ends, in seconds, or -1 to loop
 *                   the whole stream. Ignored unless looping is true.
 * @param loopTo Where the loop segment starts, in seconds. Ignored unless
 *                looping is true.
 */
 void audioMixerSetLoop(
  const audiomixerchannel_t channel,
  const bool_t looping,
  const uint8_t loopCount,
  const float_t loopStart,
  const float_t loopTo
 );
 /**
 * Starts fading the given channel from `from` to `to` over `duration`
 * seconds, eased by `easing` - see audioMixerChannelFadeTo()'s own
 * comment. Continues running (advanced every audioMixerUpdateEarly()) even
 * if the channel isn't currently playing anything.
 *
 * @param channel Channel to fade.
 * @param from Starting fade value, from 0.0 (silent) to 1.0 (loudest).
 * @param to Ending fade value, from 0.0 (silent) to 1.0 (loudest).
 * @param duration How long the fade takes, in seconds.
 * @param easing Easing curve to apply to the fade's progress.
 */
 void audioMixerFadeTo(
  const audiomixerchannel_t channel,
  const float_t from,
  const float_t to,
  const float_t duration,
  const easingtype_t easing
 );
 /**
 * Whether the given channel currently has a fade in progress (started via
 * audioMixerFadeTo() and not yet finished).
 *
 * @param channel Channel to check.
 * @return true if a fade is still in progress.
 */
 bool_t audioMixerIsFading(const audiomixerchannel_t channel);
 /**
 * Disposes the audio mixer.
 */
 errorret_t audioMixerDispose();
@@ -0,0 +1,223 @@
 /**
 * Copyright (c) 2026 Dominic Masters
 *
 * This software is released under the MIT License.
 * https://opensource.org/licenses/MIT
 */
 #include "audiomixerchannel.h"
 #include "asset/asset.h"
 #include "audio/audio.h"
 #include "audio/stream/audiostream.h"
 #include "audio/stream/audiostreamtype.h"
 #include "save/save.h"
 #include "time/time.h"
 #include "util/math.h"
 #include "assert/assert.h"
 errorret_t audioMixerChannelStopStream(audiomixerchannelstate_t *state) {
  assertNotNull(state, "State cannot be NULL.");
  if(state->stream == NULL) errorOk();
  errorChain(audioStreamDispose(state->stream));
  state->stream = NULL;
  errorOk();
 }
 void audioMixerChannelFadeTo(
  audiomixerchannelstate_t *state,
  const float_t from,
  const float_t to,
  const float_t duration,
  const easingtype_t easing
 ) {
  assertNotNull(state, "State cannot be NULL.");
  state->fade = from;
  state->fadeFrom = from;
  state->fadeTo = to;
  state->fadeDuration = duration;
  state->fadeEasing = easing;
  // A non-positive duration finishes instantly - marked inactive right
  // away (fadeTime < 0) rather than left at 0 to progress next frame,
  // since there's nothing left to progress.
  if(duration <= 0.0f) {
    state->fade = to;
    state->fadeTime = -1.0f;
  } else {
    state->fadeTime = 0.0f;
  }
 }
 bool_t audioMixerChannelIsFading(const audiomixerchannelstate_t *state) {
  assertNotNull(state, "State cannot be NULL.");
  return state->fadeTime >= 0.0f;
 }
 void audioMixerChannelApplyVolume(
  const audiomixerchannel_t channel,
  audiomixerchannelstate_t *state
 ) {
  assertNotNull(state, "State cannot be NULL.");
  if(state->stream == NULL) return;
  // Advances any in-progress fade before it's read below - see
  // audioMixerChannelFadeTo()'s own comment on fadeTime's meaning.
  if(state->fadeTime >= 0.0f) {
    state->fadeTime += TIME.delta;
    const float_t t = mathClamp(
      state->fadeTime / state->fadeDuration, 0.0f, 1.0f
    );
    state->fade = state->fadeFrom +
      (state->fadeTo - state->fadeFrom) * easingApply(state->fadeEasing, t);
    if(state->fadeTime >= state->fadeDuration) {
      state->fade = state->fadeTo;
      state->fadeTime = -1.0f;
    }
  }
  // state->fade and both SAVE.settings volumes have no setter - written
  // directly by callers - so this is the only place any of them ever gets
  // validated, rather than at the point they're set.
  assertTrue(
    state->fade >= 0.0f && state->fade <= 1.0f,
    "Channel fade is out of range."
  );
  assertTrue(
    SAVE.settings.audioChannelVolume[channel] >= 0.0f &&
    SAVE.settings.audioChannelVolume[channel] <= 1.0f,
    "Channel volume is out of range."
  );
  assertTrue(
    SAVE.settings.audioMasterVolume >= 0.0f &&
    SAVE.settings.audioMasterVolume <= 1.0f,
    "Master volume is out of range."
  );
  // Final computed volume.
  float_t volume = (
    state->baseVolume *
    state->fade *
    SAVE.settings.audioChannelVolume[channel] *
    SAVE.settings.audioMasterVolume
  );
  audioStreamSetVolume(state->stream, volume);
 }
 errorret_t audioMixerChannelUpdateEarly(
  const audiomixerchannel_t channel,
  audiomixerchannelstate_t *state
 ) {
  assertNotNull(state, "State cannot be NULL.");
  audiomixercommand_t *command = &state->pending;
  if(command->command == AUDIO_MIXER_COMMAND_STOP) {
    errorChain(audioMixerChannelStopStream(state));
    command->command = AUDIO_MIXER_COMMAND_NONE;
    audioMixerChannelApplyVolume(channel, state);
    errorOk();
  }
  if(
    command->command != AUDIO_MIXER_COMMAND_PLAY ||
    command->loadingAsset == NULL
  ) {
    // A PLAY command with no loadingAsset yet (command->loadingAsset ==
    // NULL) was queued too late for the audioMixerChannelUpdateLate() that
    // just ran immediately before this call to have locked it - the only
    // way that happens is a command queued outside the normal per-frame
    // cycle, e.g. during engine startup before any
    // audioMixerChannelUpdateLate() has run yet. Left alone (still
    // AUDIO_MIXER_COMMAND_PLAY) rather than treated as an error: the very
    // next audioMixerChannelUpdateLate() will lock it, and the frame after
    // that will reach here and apply it normally.
    audioMixerChannelApplyVolume(channel, state);
    errorOk();
  }
  // Blocks here if audioMixerChannelUpdateLate()'s load (kicked off at the
  // end of the previous frame) hasn't finished yet - see this function's
  // own doc comment on why that's accepted for now.
  errorret_t loadRet = assetRequireLoaded(command->loadingAsset);
  if(errorIsNotOk(loadRet)) {
    assetUnlockEntry(command->loadingAsset);
    command->loadingAsset = NULL;
    command->command = AUDIO_MIXER_COMMAND_NONE;
    errorChain(loadRet);
  }
  errorChain(audioMixerChannelStopStream(state));
  audiostream_t *stream = audioAquireStream(command->loadingAsset);
  assertNotNull(stream, "No free audio stream slots available.");
  errorret_t initRet = audioStreamInit(stream, command->loadingAsset);
  // The stream holds its own lock on the asset once initialized (or, on
  // failure, audioStreamInit() has already released it itself) - either
  // way this call's own lock is no longer needed.
  assetUnlockEntry(command->loadingAsset);
  command->loadingAsset = NULL;
  command->command = AUDIO_MIXER_COMMAND_NONE;
  errorChain(initRet);
  // Forwards to this channel's own onLoop/onEnd (persistent across every
  // play on this channel) rather than this one stream instance's own -
  // see audiomixerchannelstate_t.onLoop's own comment.
  stream->user = state;
  stream->onLoop = audioMixerChannelOnStreamLoop;
  stream->onEnd = audioMixerChannelOnStreamEnd;
  audioStreamSetDirectionality(stream, command->pan);
  if(command->looping) {
    audioStreamSetLooping(stream, true);
    audioStreamSetLoopPoints(stream, command->loopStart, command->loopTo);
    audioStreamSetLoopLimit(stream, command->loopCount);
  }
  audioStreamPlay(stream);
  state->stream = stream;
  state->baseVolume = command->volume;
  audioMixerChannelApplyVolume(channel, state);
  errorOk();
 }
 errorret_t audioMixerChannelUpdateLate(audiomixerchannelstate_t *state) {
  assertNotNull(state, "State cannot be NULL.");
  audiomixercommand_t *command = &state->pending;
  if(command->command != AUDIO_MIXER_COMMAND_PLAY) errorOk();
  assetloadertype_t assetType = audioStreamAssetTypeForPath(command->file);
  assertTrue(
    assetType != ASSET_LOADER_TYPE_NULL, "Unsupported audio file extension."
  );
  // Begins loading now - kicked off at the end of this frame so it has
  // until the start of the next (audioMixerChannelUpdateEarly()) to finish
  // before that has to block on it.
  command->loadingAsset = assetLock(command->file, assetType, NULL);
  errorOk();
 }
 void audioMixerChannelOnStreamLoop(audiostream_t *stream) {
  assertNotNull(stream, "Stream cannot be NULL.");
  audiomixerchannelstate_t *state = (audiomixerchannelstate_t *) stream->user;
  if(state->onLoop != NULL) state->onLoop(state);
 }
 void audioMixerChannelOnStreamEnd(audiostream_t *stream) {
  assertNotNull(stream, "Stream cannot be NULL.");
  audiomixerchannelstate_t *state = (audiomixerchannelstate_t *) stream->user;
  if(state->onEnd != NULL) state->onEnd(state);
 }
@@ -0,0 +1,242 @@
 /**
 * Copyright (c) 2026 Dominic Masters
 *
 * This software is released under the MIT License.
 * https://opensource.org/licenses/MIT
 */
 #pragma once
 #include "dusk.h"
 #include "error/error.h"
 #include "animation/easing.h"
 // Forward-declared rather than including asset/asset.h - this header only
 // ever needs a pointer to it, and pulling in the full asset module here
 // creates a real include cycle for anything that reaches this header via
 // asset/loader/cutscene/assetcutsceneloader.h (asset.h -> ... ->
 // assetloader.h -> assetcutsceneloader.h -> cutscene.h -> cutsceneitem.h
 // -> the audio cutscene items -> this header -> asset/asset.h again,
 // mid-parse). audiomixerchannel.c itself still includes the full header.
 typedef struct assetentry_s assetentry_t;
 typedef struct audiostream_s audiostream_t;
 #define AUDIO_PATH_MAX 256
 typedef enum {
  AUDIO_MIXER_CHANNEL_BGM_0,
  AUDIO_MIXER_CHANNEL_VOICE_0,
  AUDIO_MIXER_CHANNEL_VOICE_1,
  AUDIO_MIXER_CHANNEL_SFX_0,
  AUDIO_MIXER_CHANNEL_SFX_1,
  AUDIO_MIXER_CHANNEL_SFX_2,
  AUDIO_MIXER_CHANNEL_SFX_3,
  AUDIO_MIXER_CHANNEL_COUNT
 } audiomixerchannel_t;
 typedef enum {
  AUDIO_MIXER_COMMAND_NONE,
  AUDIO_MIXER_COMMAND_PLAY,
  AUDIO_MIXER_COMMAND_STOP
 } audiomixercommandtype_t;
 typedef struct {
  // What audioMixerChannelUpdateEarly() should do to this channel at the
  // start of the next frame - AUDIO_MIXER_COMMAND_NONE if nothing's
  // queued. Set by audioMixerPlay()/audioMixerPlayLooped()/
  // audioMixerStop(); queuing a new command on a channel replaces, rather
  // than stacks on top of, whatever was already queued for it this frame -
  // only the most recent survives.
  audiomixercommandtype_t command;
  // AUDIO_MIXER_COMMAND_PLAY only, below.
  char_t file[AUDIO_PATH_MAX];
  float_t volume;
  float_t pan;
  bool_t looping;
  uint8_t loopCount;
  float_t loopStart;
  float_t loopTo;
  // Set by audioMixerChannelUpdateLate() (the end of the frame this PLAY
  // command was queued on), once it locks the requested file and kicks off
  // its load. audioMixerChannelUpdateEarly() (the start of the next frame)
  // blocks on this being fully loaded before actually starting playback -
  // see its own comment. NULL except in that in-between window.
  assetentry_t *loadingAsset;
 } audiomixercommand_t;
 typedef struct audiomixerchannelstate_s audiomixerchannelstate_t;
 typedef struct audiomixerchannelstate_s {
  // Queued action for the next audioMixerChannelUpdateEarly() to apply.
  audiomixercommand_t pending;
  // This channel's currently playing stream, or NULL if nothing is -
  // acquired from AUDIO.streams by audioMixerChannelUpdateEarly() when it
  // applies an AUDIO_MIXER_COMMAND_PLAY, disposed the same way on
  // AUDIO_MIXER_COMMAND_STOP or before a new AUDIO_MIXER_COMMAND_PLAY
  // replaces it.
  audiostream_t *stream;
  // The per-sound volume `stream` was last started with (the `volume`
  // argument to whichever audioMixerPlay()/audioMixerPlayLooped() call
  // started it) - combined with this channel's fade, its own volume
  // (SAVE.settings.audioChannelVolume) and the mixer's master volume
  // (SAVE.settings.audioMasterVolume), every frame, to get the volume
  // actually passed to audioStreamSetVolume(). Meaningless while `stream`
  // is NULL.
  float_t baseVolume;
  // This channel's own fade multiplier, from 0.0 (fully faded out) to 1.0
  // (no fade applied, the default) - transient runtime state, unlike the
  // channel/master volumes below (which are persisted user preferences).
  // No setter - write it directly; audioMixerChannelApplyVolume() asserts
  // it's in range the next time it reads it, rather than validating at the
  // point it's set.
  float_t fade;
  // Fade transition state, set by audioMixerChannelFadeTo() and advanced
  // every frame by audioMixerChannelApplyVolume(), before it reads `fade`
  // to compute the mixed volume. fadeTime < 0 means no fade is in progress
  // (audioMixerChannelIsFading() is just `fadeTime >= 0`) - audioMixerInit()
  // explicitly sets this to -1.0f, since zero-initializing it would
  // otherwise look like an active fade at time 0.
  float_t fadeFrom;
  float_t fadeTo;
  float_t fadeDuration;
  float_t fadeTime;
  easingtype_t fadeEasing;
  // Arbitrary caller data, handed back as-is to onLoop/onEnd below - never
  // read or written by the mixer itself. NULL by default.
  void *user;
  // Fired (from the main thread - safe to do arbitrary work, same
  // guarantee as audiostream_t's own onLoop/onEnd) whenever this channel's
  // currently playing stream loops, or reaches its natural end (including
  // hitting its loop limit - see audioStreamSetLoopLimit()) and stops.
  // Wired onto every stream this channel starts via
  // audioMixerChannelOnStreamLoop()/OnStreamEnd() - not called directly by
  // anything else. No setter - write these fields directly; NULL (the
  // default) means not notified. Unlike `stream`/`pending`, these persist
  // across every play on this channel, not just one.
  void (*onLoop)(audiomixerchannelstate_t *state);
  void (*onEnd)(audiomixerchannelstate_t *state);
 } audiomixerchannelstate_t;
 /**
 * Stops and disposes the given channel's currently playing stream, if any -
 * a safe no-op if the channel is already idle. Shared by
 * audioMixerChannelUpdateEarly() (AUDIO_MIXER_COMMAND_STOP, and replacing a
 * channel's stream before a new AUDIO_MIXER_COMMAND_PLAY starts) and
 * audioMixerDispose().
 *
 * @param state The channel state to stop.
 */
 errorret_t audioMixerChannelStopStream(audiomixerchannelstate_t *state);
 /**
 * Computes the given channel's actual playback volume - its currently
 * playing sound's own volume (baseVolume), this channel's fade, this
 * channel's own volume (SAVE.settings.audioChannelVolume[channel]) and the
 * mixer's master volume (SAVE.settings.audioMasterVolume) - and applies it
 * via audioStreamSetVolume(). Asserts fade and both save-settings volumes
 * are each within [0.0, 1.0] - the only validation any of them ever gets,
 * since none of them have a setter. A safe no-op if the channel isn't
 * playing anything. Called every audioMixerChannelUpdateEarly(), not just
 * when a PLAY command starts a new stream - see its own comment.
 *
 * @param channel Which channel `state` is, to index
 *                SAVE.settings.audioChannelVolume with.
 * @param state The channel state to update.
 */
 void audioMixerChannelApplyVolume(
  const audiomixerchannel_t channel,
  audiomixerchannelstate_t *state
 );
 /**
 * Starts fading the given channel's `fade` multiplier from `from` to `to`
 * over `duration` seconds, eased by `easing` - snaps `fade` to `from`
 * immediately, then audioMixerChannelApplyVolume() advances it every frame
 * from here on. A `duration` of 0 or less snaps straight to `to` and marks
 * the fade as already finished (audioMixerChannelIsFading() returns
 * false on the very next call).
 *
 * @param state The channel state to fade.
 * @param from Starting fade value, from 0.0 (silent) to 1.0 (loudest).
 * @param to Ending fade value, from 0.0 (silent) to 1.0 (loudest).
 * @param duration How long the fade takes, in seconds.
 * @param easing Easing curve to apply to the fade's progress.
 */
 void audioMixerChannelFadeTo(
  audiomixerchannelstate_t *state,
  const float_t from,
  const float_t to,
  const float_t duration,
  const easingtype_t easing
 );
 /**
 * Whether the given channel currently has a fade in progress (started via
 * audioMixerChannelFadeTo() and not yet finished).
 *
 * @param state The channel state to check.
 * @return true if a fade is still in progress.
 */
 bool_t audioMixerChannelIsFading(const audiomixerchannelstate_t *state);
 /**
 * Updates a single mixer channel, called before rendering (the start of
 * the frame): applies whatever command (play, stop - including everything
 * a play carries, pan/looping) audioMixerChannelUpdateLate() queued for
 * loading at the end of the previous frame. If that load hasn't finished
 * yet, this blocks (via assetRequireLoaded()) until it has - a deliberate
 * stall for now rather than skipping a frame, since there's currently no
 * way to only partially apply a channel's command. Also recomputes and
 * reapplies this channel's mixed volume (see
 * audioMixerChannelApplyVolume()) every time, regardless of whether a
 * command was queued this frame, so a live change to this channel's fade,
 * its own volume, or the master volume takes effect on whatever's already
 * playing too.
 *
 * @param channel Which channel `state` is - see
 *                audioMixerChannelApplyVolume()'s own comment.
 * @param state The channel state to update.
 */
 errorret_t audioMixerChannelUpdateEarly(
  const audiomixerchannel_t channel,
  audiomixerchannelstate_t *state
 );
 /**
 * Updates a single mixer channel, called at the end of each frame, once
 * every other system has had a chance to queue a command via
 * audioMixerPlay()/audioMixerPlayLooped()/audioMixerStop(). For a queued
 * AUDIO_MIXER_COMMAND_PLAY, locks its file and begins loading it (see
 * assetLock()) - giving it from now until the next
 * audioMixerChannelUpdateEarly() to finish before that has to block on it.
 * Actually starting/stopping playback happens there, not here.
 *
 * @param state The channel state to update.
 */
 errorret_t audioMixerChannelUpdateLate(audiomixerchannelstate_t *state);
 /**
 * Trampoline wired onto every stream a channel starts (as that stream's
 * onLoop) - forwards to the channel's own onLoop (see
 * audiomixerchannelstate_t.onLoop's own comment) via stream->user, which
 * audioMixerChannelUpdateEarly() points at the channel's own state.
 *
 * @param stream The stream that looped.
 */
 void audioMixerChannelOnStreamLoop(audiostream_t *stream);
 /**
 * Same as audioMixerChannelOnStreamLoop() but wired onto onEnd, forwarding
 * to the channel's own onEnd.
 *
 * @param stream The stream that ended.
 */
 void audioMixerChannelOnStreamEnd(audiostream_t *stream);
@@ -0,0 +1,13 @@
 # Copyright (c) 2026 Dominic Masters
 # 
 # This software is released under the MIT License.
 # https://opensource.org/licenses/MIT
 # Sources
 target_sources(${DUSK_LIBRARY_TARGET_NAME}
  PUBLIC
    audiostream.c
    audiostreampcm.c
    audiostreammp3.c
    audiostreamtype.c
 )
@@ -0,0 +1,312 @@
 /**
 * Copyright (c) 2026 Dominic Masters
 * 
 * This software is released under the MIT License.
 * https://opensource.org/licenses/MIT
 */
 #include "audiostream.h"
 #include "assert/assert.h"
 #include "util/math.h"
 errorret_t audioStreamInit(audiostream_t *stream, assetentry_t *asset) {
  assertNotNull(stream, "Stream cannot be NULL.");
  assertNotNull(asset, "Asset cannot be NULL.");
  assertTrue(
    asset->state == ASSET_ENTRY_STATE_LOADED,
    "Asset must be loaded before it can back an audio stream."
  );
  // A caller passing an asset type that can't back an audio stream is a
  // programmer error, not something that can happen from untrusted data, so
  // this is an assert rather than an errorThrow (see
  // feedback_assert_vs_error convention).
  assertTrue(
    audioStreamTypeForAssetType(asset->type) != AUDIO_STREAM_TYPE_NULL,
    "Unsupported asset type for an audio stream."
  );
  stream->state = 0;
  stream->volume = 1.0f;
  stream->directionality = AUDIO_STREAM_CENTER;
  stream->loopStart = -1;
  stream->loopTo = 0;
  stream->duration = 0;
  stream->startFrame = 0;
  stream->seeking = false;
  stream->user = NULL;
  stream->onLoop = NULL;
  stream->onEnd = NULL;
  stream->loopCount = 0;
  stream->lastLoopCount = 0;
  stream->loopLimit = 0;
  stream->loopRestartCount = 0;
  // Locked for as long as the stream is in use (see audiostream_t.asset's
  // own comment) - released in audioStreamDispose().
  stream->asset = asset;
  assetEntryLock(asset);
  // Type-specific setup (audioStreamPcmInit() / audioStreamMp3Init())
  // determines stream->type, sets stream->sampleRate/channels, and asks
  // the platform implementation to set up its state.
  errorret_t ret = asset->type == ASSET_LOADER_TYPE_MP3
    ? audioStreamMp3Init(stream)
    : audioStreamPcmInit(stream);
  if(errorIsNotOk(ret)) {
    assetEntryUnlock(asset);
    stream->asset = NULL;
    errorChain(ret);
  }
  errorOk();
 }
 size_t audioStreamGetTotalFrames(const audiostream_t *stream) {
  assertNotNull(stream, "Stream cannot be NULL.");
  return stream->type == AUDIO_STREAM_TYPE_MP3
    ? audioStreamMp3GetTotalFrames(stream)
    : audioStreamPcmGetTotalFrames(stream);
 }
 errorret_t audioStreamSeek(audiostream_t *stream, const size_t frame) {
  assertNotNull(stream, "Stream cannot be NULL.");
  errorChain(
    stream->type == AUDIO_STREAM_TYPE_MP3
      ? audioStreamMp3Seek(stream, frame)
      : audioStreamPcmSeek(stream, frame)
  );
  errorOk();
 }
 errorret_t audioStreamRead(
  audiostream_t *stream,
  int16_t *buffer,
  const size_t frameCount,
  size_t *outFramesRead
 ) {
  assertNotNull(stream, "Stream cannot be NULL.");
  errorChain(
    stream->type == AUDIO_STREAM_TYPE_MP3
      ? audioStreamMp3Read(stream, buffer, frameCount, outFramesRead)
      : audioStreamPcmRead(stream, buffer, frameCount, outFramesRead)
  );
  errorOk();
 }
 void audioStreamPlay(audiostream_t *stream) {
  assertNotNull(stream, "Stream cannot be NULL.");
  stream->state |= AUDIO_STREAM_STATE_PLAYING;
 }
 void audioStreamPause(audiostream_t *stream) {
  assertNotNull(stream, "Stream cannot be NULL.");
  stream->state &= ~AUDIO_STREAM_STATE_PLAYING;
 }
 void audioStreamSetPosition(audiostream_t *stream, const float_t position) {
  assertNotNull(stream, "Stream cannot be NULL.");
  // Wrap into [0, duration).
  float_t t = position;
  while(t < 0) t += stream->duration;
  while(t >= stream->duration) t -= stream->duration;
  stream->startFrame = (size_t) (t * stream->sampleRate);
  stream->seeking = true;
  // Force the next audioStreamUpdate() to re-buffer from startFrame instead
  // of continuing whatever was already buffered - see the platform Buffer()
  // implementations for how each one applies startFrame; PSP is the one
  // exception (see audioStreamSetPosition's own doc comment).
  stream->state &= ~AUDIO_STREAM_STATE_BUFFERED;
 }
 void audioStreamSetLoopPoints(
  audiostream_t *stream,
  const float_t loopStart,
  const float_t loopTo
 ) {
  assertNotNull(stream, "Stream cannot be NULL.");
  assertTrue(
    loopStart < 0 || loopTo < loopStart,
    "loopTo must be before loopStart."
  );
  stream->loopStart = loopStart;
  stream->loopTo = loopTo;
 }
 void audioStreamGetPanFactors(
  const audiostream_t *stream,
  float_t *outLeft,
  float_t *outRight
 ) {
  assertNotNull(stream, "Stream cannot be NULL.");
  assertNotNull(outLeft, "outLeft cannot be NULL.");
  assertNotNull(outRight, "outRight cannot be NULL.");
  // directionality is already a pan factor in AUDIO_STREAM_LEFT..RIGHT
  // (-1.0..1.0) - assertTrue'd here rather than clamped, since a caller
  // passing something outside that range is a programmer error (see
  // audioStreamSetDirectionality()'s own assert).
  const float_t pan = stream->directionality;
  *outLeft = pan > 0 ? (1.0f - pan) : 1.0f;
  *outRight = pan < 0 ? (1.0f + pan) : 1.0f;
 }
 size_t audioStreamComputeEndFrame(
  const audiostream_t *stream,
  const size_t startFrame,
  const size_t totalFrames
 ) {
  assertNotNull(stream, "Stream cannot be NULL.");
  size_t endFrame = totalFrames;
  if((stream->state & AUDIO_STREAM_STATE_LOOPING) && stream->loopStart >= 0) {
    endFrame = mathMin(
      (size_t) (stream->loopStart * stream->sampleRate), totalFrames
    );
  }
  if(startFrame >= endFrame) endFrame = totalFrames;
  return endFrame;
 }
 void audioStreamSetVolume(audiostream_t *stream, const float_t volume) {
  assertNotNull(stream, "Stream cannot be NULL.");
  assertTrue(volume >= 0.0f && volume <= 1.0f, "Volume is out of range.");
  stream->volume = volume;
  // TODO: Do I need to update the device output? PSP may require this
 }
 void audioStreamSetDirectionality(
  audiostream_t *stream,
  const float_t directionality
 ) {
  assertNotNull(stream, "Stream cannot be NULL.");
  assertTrue(
    directionality >= AUDIO_STREAM_LEFT && directionality <= AUDIO_STREAM_RIGHT,
    "Directionality is out of range."
  );
  stream->directionality = directionality;
  // TODO: Need to update internal decoder?
 }
 void audioStreamSetLooping(audiostream_t *stream, const bool_t looping) {
  assertNotNull(stream, "Stream cannot be NULL.");
  if(looping) {
    stream->state |= AUDIO_STREAM_STATE_LOOPING;
  } else {
    stream->state &= ~AUDIO_STREAM_STATE_LOOPING;
  }
 }
 void audioStreamSetLoopLimit(audiostream_t *stream, const uint32_t loopLimit) {
  assertNotNull(stream, "Stream cannot be NULL.");
  stream->loopLimit = loopLimit;
  stream->loopRestartCount = 0;
 }
 errorret_t audioStreamUpdate(audiostream_t *stream) {
  assertNotNull(stream, "Stream cannot be NULL.");
  if(stream->type == AUDIO_STREAM_TYPE_NULL) {
    errorOk();
  }
  // Some platforms (PSP) loop entirely on their own background thread for
  // gaplessness and can only safely notify onLoop by incrementing this
  // counter from there, rather than calling onLoop directly off the main
  // thread - see loopCount's own comment. Firing it here, unconditionally,
  // catches up to the latest count in one call even if multiple loops
  // happened between two Update() calls.
  if(stream->loopCount != stream->lastLoopCount) {
    stream->lastLoopCount = stream->loopCount;
    if(stream->onLoop != NULL) {
      stream->onLoop(stream);
    }
  }
  // TODO: Once streamed (rather than fully in-memory) sources exist, this is
  // where new data would be decoded/read in and re-buffered as playback
  // consumes it.
  // Checked in this order (finished-check before needs-buffering) so that a
  // loop restart falls straight through into re-buffering within this same
  // call, instead of leaving BUFFERED cleared for the caller to notice and
  // act on next frame - that extra frame of latency was audible as a gap
  // at every loop boundary.
  if(
    (stream->state & AUDIO_STREAM_STATE_PLAYING) &&
    (stream->state & AUDIO_STREAM_STATE_BUFFERED) &&
    audioStreamPlatformIsFinished(stream)
  ) {
    // A limit of 0 means unlimited; otherwise this pass's restart only goes
    // ahead while fewer than loopLimit restarts have already happened -
    // once it's reached, fall through to the same stop/onEnd path as a
    // non-looping stream instead of restarting again.
    const bool_t loopLimitReached = stream->loopLimit > 0 &&
      stream->loopRestartCount >= stream->loopLimit;
    if((stream->state & AUDIO_STREAM_STATE_LOOPING) && !loopLimitReached) {
      stream->state &= ~AUDIO_STREAM_STATE_BUFFERED;
      stream->loopRestartCount++;
      // Resume from loopTo rather than the very start of the buffer - only
      // matters for platforms that reach this generic restart path at all
      // (Linux and Dolphin, both of which re-buffer per pass and report
      // "finished" at every loop boundary); PSP loops entirely on its own
      // read-ahead ring instead (see loopRestartCount's own comment).
      stream->startFrame = (size_t) (stream->loopTo * stream->sampleRate);
      if(stream->onLoop != NULL) {
        stream->onLoop(stream);
      }
    } else {
      stream->state &=
        ~(AUDIO_STREAM_STATE_PLAYING | AUDIO_STREAM_STATE_BUFFERED);
      if(stream->onEnd != NULL) {
        stream->onEnd(stream);
      }
    }
  }
  if(
    (stream->state & AUDIO_STREAM_STATE_PLAYING) &&
    !(stream->state & AUDIO_STREAM_STATE_BUFFERED)
  ) {
    errorChain(audioStreamPlatformBuffer(stream));
    stream->state |= AUDIO_STREAM_STATE_BUFFERED;
  }
  errorOk();
 }
 errorret_t audioStreamDispose(audiostream_t *stream) {
  assertNotNull(stream, "Stream cannot be NULL.");
  if(stream->type != AUDIO_STREAM_TYPE_NULL) {
    errorChain(audioStreamPlatformDispose(stream));
  }
  if(stream->type == AUDIO_STREAM_TYPE_PCM) {
    errorChain(audioStreamPcmDispose(stream));
  } else if(stream->type == AUDIO_STREAM_TYPE_MP3) {
    errorChain(audioStreamMp3Dispose(stream));
  }
  if(stream->asset != NULL) {
    assetEntryUnlock(stream->asset);
    stream->asset = NULL;
  }
  stream->type = AUDIO_STREAM_TYPE_NULL;
  errorOk();
 }
@@ -0,0 +1,360 @@
 /**
 * Copyright (c) 2026 Dominic Masters
 *
 * This software is released under the MIT License.
 * https://opensource.org/licenses/MIT
 */
 #pragma once
 #include "audio/stream/audiostreamtype.h"
 #include "audio/stream/audiostreampcm.h"
 #include "audio/stream/audiostreammp3.h"
 #include "audio/audiostreamplatform.h"
 #include "asset/loader/assetentry.h"
 #ifndef audioStreamPlatformInit
  #error "audioStreamPlatformInit is not defined"
 #endif
 #ifndef audioStreamPlatformDispose
  #error "audioStreamPlatformDispose is not defined"
 #endif
 #ifndef audioStreamPlatformBuffer
  #error "audioStreamPlatformBuffer is not defined"
 #endif
 #ifndef audioStreamPlatformIsFinished
  #error "audioStreamPlatformIsFinished is not defined"
 #endif
 #define AUDIO_STREAMS_MAX 8
 #define AUDIO_STREAM_STATE_PLAYING (1 << 0)
 #define AUDIO_STREAM_STATE_LOOPING (1 << 1)
 #define AUDIO_STREAM_STATE_BUFFERED (1 << 2)
 #define AUDIO_STREAM_CENTER 0.0f
 #define AUDIO_STREAM_LEFT -1.0f
 #define AUDIO_STREAM_RIGHT 1.0f
 typedef struct audiostream_s audiostream_t;
 typedef struct audiostream_s {
  // Used for aquiring new data.
  audistreamtype_t type;
  // What state the stream is in. volatile: PSP's output thread reads
  // AUDIO_STREAM_STATE_PLAYING directly to honor a pause promptly instead
  // of only reacting once the main thread's own per-frame gate notices -
  // see audioStreamPSPThreadFeed()'s own comment.
  volatile uint8_t state;
  // The asset backing this stream's data (e.g. a WAV file) - determines
  // `type` (see audioStreamInit()) and is read from on demand by the
  // type-specific module (e.g. audiostreampcm.h) rather than ever being
  // fully decoded into memory up front. The stream holds its own lock on
  // this entry (assetEntryLock()/assetEntryUnlock()) for as long as it's
  // in use, independent of whatever lock(s) the caller that requested
  // playback may also be holding.
  assetentry_t *asset;
  // Loudness, from 0.0 (silent) to 1.0 (loudest).
  float_t volume;
  // In stereo space, where do we send the audio - from AUDIO_STREAM_LEFT
  // (-1.0) to AUDIO_STREAM_RIGHT (1.0), AUDIO_STREAM_CENTER (0.0) by
  // default.
  // TODO: Can we use a 3D vector + Pro Logic II?
  float_t directionality;
  // In seconds, where the loop segment ends and playback jumps back to
  // loopTo - -1 (the default) means "at the end of the stream", i.e. loop
  // the whole buffer. Set via audioStreamSetLoopPoints().
  float_t loopStart;
  // In seconds, where a loop jumps back to once it reaches loopStart.
  // Defaults to 0 (start of stream). Set via audioStreamSetLoopPoints().
  float_t loopTo;
  // Cached duration of the stream in seconds.
  float_t duration;
  // Frame offset the next platform Buffer() call should start playback
  // from - set by audioStreamSetPosition() (an explicit seek) and by
  // audioStreamUpdate() itself (to loopTo's frame offset, for platforms
  // that re-enter Buffer() on every loop restart rather than looping
  // natively). Each platform's Buffer()-invoking entry point must read and
  // reset this to 0 synchronously, in the same call that decided to
  // (re)buffer - not later/asynchronously (e.g. from a feeder thread),
  // since audioStreamUpdate() may already have moved on to something else
  // that touches this field by the time an async reader gets to it.
  size_t startFrame;
  // True when startFrame came from an explicit audioStreamSetPosition()
  // seek rather than a natural loop restart. Platforms whose Buffer() call
  // can leave previously-queued audio still playing underneath the new
  // pass (currently just Linux's SDL queue, kept deliberately overlapping
  // across a loop restart to avoid a gap) need this to tell "jump now,
  // discarding whatever's still playing" (seek) apart from "let the old
  // tail keep playing while the new pass queues underneath it" (loop
  // restart) - both look identical as just "a pending startFrame"
  // otherwise. Consumed (reset to false) the same way as startFrame.
  bool_t seeking;
  // Callbacks
  void *user;
  void (*onLoop)(audiostream_t *stream);
  void (*onEnd)(audiostream_t *stream);
  // Incremented by platform code (from whatever thread/context it runs in)
  // each time a loop happens, instead of calling onLoop directly - onLoop
  // may do arbitrary, possibly-slow work (console printing, game logic),
  // which is only safe to run from the main thread inside audioStreamUpdate().
  // Calling it straight from a real-time audio thread risks starving the
  // hardware buffer if it takes too long - confirmed as the real cause of
  // a loud crackle on PSP once its feeder thread called onLoop inline.
  volatile uint32_t loopCount;
  // audioStreamUpdate()'s own record of the last loopCount it fired
  // onLoop for - only ever touched from the main thread.
  uint32_t lastLoopCount;
  // Maximum number of times this stream is allowed to loop before stopping
  // (firing onEnd) instead of restarting again - 0 (the default) means loop
  // forever. Has no effect unless looping is also enabled via
  // audioStreamSetLooping(). Set via audioStreamSetLoopLimit().
  uint32_t loopLimit;
  // How many loop restarts this stream has already committed to - compared
  // against loopLimit each time a restart is considered, then incremented
  // if it goes ahead; reset to 0 by audioStreamSetLoopLimit(). Distinct
  // from loopCount (which tracks when a loop becomes audible, purely for
  // onLoop notification, and is PSP-only) - this counts decided restarts,
  // main-thread-only on every platform (PSP decides whether to loop from
  // its own read-ahead ring, itself driven from the main thread via
  // audioStreamPSPIsFinished() - see its own comment).
  uint32_t loopRestartCount;
  // PCM format of the stream's decoded output - read identically by every
  // platform backend regardless of stream type (PCM decodes straight
  // through; MP3 decodes to this same format), so it lives here rather
  // than duplicated in both audiostreampcm_t and audiostreammp3_t. Set by
  // whichever type-specific Init function runs (audioStreamPcmInit() /
  // audioStreamMp3Init()).
  uint32_t sampleRate;
  uint8_t channels;
  // Stream type specific data.
  union {
    audiostreampcm_t pcm;
    audiostreammp3_t mp3;
  };
  // Platform-specific playback state (e.g. SDL2 device, PSP channel, ASND
  // voice). Defined by each platform's audiostreamplatform.h.
  audiostreamplatform_t platform;
 } audiostream_t;
 /**
 * Initializes an audio stream to play the given asset, determining the
 * stream's type from the asset's loader type (e.g. a WAV asset becomes an
 * AUDIO_STREAM_TYPE_PCM stream) and dispatching to that type's own setup
 * (e.g. audioStreamPcmInit()). Does not begin playback; call
 * audioStreamPlay() once this returns.
 *
 * The stream takes its own lock on `asset` (see audiostream_t.asset's own
 * comment), released by audioStreamDispose() - the asset must already be
 * loaded (ASSET_ENTRY_STATE_LOADED) when this is called.
 *
 * @param stream The audio stream to initialize.
 * @param asset The loaded asset to play - its type must be one this
 *              function supports (ASSET_LOADER_TYPE_WAV or
 *              ASSET_LOADER_TYPE_MP3).
 * @return Error indicating success or failure.
 */
 errorret_t audioStreamInit(audiostream_t *stream, assetentry_t *asset);
 /**
 * Returns the total number of decoded PCM frames (one sample per channel)
 * available in the stream's underlying data, regardless of its type -
 * dispatches to audioStreamPcmGetTotalFrames() or
 * audioStreamMp3GetTotalFrames(). Platform backends should use this rather
 * than a type-specific function directly, so they don't need to know or
 * care which type they're driving.
 *
 * @param stream The audio stream to query.
 * @return The total number of frames available.
 */
 size_t audioStreamGetTotalFrames(const audiostream_t *stream);
 /**
 * Seeks the stream's decode position to the given frame offset, regardless
 * of its type - dispatches to audioStreamPcmSeek() or audioStreamMp3Seek().
 *
 * @param stream The audio stream to seek.
 * @param frame Frame offset to seek to, relative to the start of the
 *              stream's decoded data.
 * @return Error indicating success or failure.
 */
 errorret_t audioStreamSeek(audiostream_t *stream, const size_t frame);
 /**
 * Reads up to frameCount frames of decoded PCM sample data from the
 * stream's current position, regardless of its type - dispatches to
 * audioStreamPcmRead() or audioStreamMp3Read(). See either for the exact
 * short-read-at-end-of-stream contract, which is identical for both.
 *
 * @param stream The audio stream to read from.
 * @param buffer Destination buffer, sized for at least frameCount frames.
 * @param frameCount Maximum number of frames to read.
 * @param outFramesRead Set to the number of frames actually read.
 * @return Error indicating success or failure.
 */
 errorret_t audioStreamRead(
  audiostream_t *stream,
  int16_t *buffer,
  const size_t frameCount,
  size_t *outFramesRead
 );
 /**
 * Begins or resumes playback of the given audio stream.
 *
 * @param stream The audio stream to play.
 */
 void audioStreamPlay(audiostream_t *stream);
 /**
 * Pauses playback of the given audio stream. Playback position is retained,
 * so audioStreamPlay() resumes from the same point.
 *
 * @param stream The audio stream to pause.
 */
 void audioStreamPause(audiostream_t *stream);
 /**
 * Seeks the given audio stream to the given position, in seconds, wrapping
 * into range if the position is outside [0, duration). Takes effect on the
 * next audioStreamUpdate() call for platforms that re-buffer per frame
 * (e.g. Linux); on PSP, which manages an entire playback pass on its own
 * feeder thread once started, a seek only takes effect the next time the
 * stream begins playing from a stopped state, not instantaneously mid-pass.
 *
 * @param stream The audio stream to seek.
 * @param position The new playback position, in seconds.
 */
 void audioStreamSetPosition(audiostream_t *stream, const float_t position);
 /**
 * Sets the loop region for the given audio stream: once playback reaches
 * loopStart, it jumps back to loopTo instead of continuing (or stopping,
 * if not looping). Has no effect unless looping is also enabled via
 * audioStreamSetLooping().
 *
 * @param stream The audio stream to update.
 * @param loopStart Where the loop segment ends, in seconds, or -1 to loop
 *                   the whole stream (the default).
 * @param loopTo Where the loop segment starts, in seconds.
 */
 void audioStreamSetLoopPoints(
  audiostream_t *stream,
  const float_t loopStart,
  const float_t loopTo
 );
 /**
 * Computes normalized left/right pan factors (0..1) for the given audio
 * stream's directionality. Callers multiply these by their own
 * platform-specific base volume representation.
 *
 * @param stream The audio stream to read directionality from.
 * @param outLeft Set to the left channel's pan factor.
 * @param outRight Set to the right channel's pan factor.
 */
 void audioStreamGetPanFactors(
  const audiostream_t *stream,
  float_t *outLeft,
  float_t *outRight
 );
 /**
 * Computes the stop frame for a playback pass starting at startFrame: the
 * current loop segment's end (stream->loopStart, converted to frames and
 * clamped to totalFrames) if looping is enabled and a loop start is set,
 * or totalFrames itself otherwise - including when startFrame has already
 * reached or passed the computed loop end (e.g. a seek landing in an
 * outro past the loop point), in which case this pass plays out to the
 * true end of the stream once instead of only the loop segment.
 *
 * @param stream The audio stream to compute this for.
 * @param startFrame This pass's starting frame offset.
 * @param totalFrames The stream's total decoded frame count
 *                     (audioStreamGetTotalFrames()).
 * @return This pass's stop frame offset.
 */
 size_t audioStreamComputeEndFrame(
  const audiostream_t *stream,
  const size_t startFrame,
  const size_t totalFrames
 );
 /**
 * Sets the playback volume of the given audio stream.
 *
 * @param stream The audio stream to update.
 * @param volume The new volume, from 0.0 (silent) to 1.0 (loudest).
 */
 void audioStreamSetVolume(audiostream_t *stream, const float_t volume);
 /**
 * Sets the stereo directionality (panning) of the given audio stream.
 *
 * @param stream The audio stream to update.
 * @param directionality The new panning value, from AUDIO_STREAM_LEFT to
 *                        AUDIO_STREAM_RIGHT.
 */
 void audioStreamSetDirectionality(
  audiostream_t *stream,
  const float_t directionality
 );
 /**
 * Sets whether the given audio stream loops back to loopTo (or the start
 * of the buffer, by default - see audioStreamSetLoopPoints()) when it
 * reaches loopStart (or the end of the buffer), rather than stopping and
 * firing onEnd.
 *
 * @param stream The audio stream to update.
 * @param looping Whether the stream should loop.
 */
 void audioStreamSetLooping(audiostream_t *stream, const bool_t looping);
 /**
 * Sets the maximum number of times the given audio stream is allowed to
 * loop before stopping (firing onEnd) instead of restarting again. Has no
 * effect unless looping is also enabled via audioStreamSetLooping(). Resets
 * the stream's current loop-restart progress back to 0, so the stream gets
 * the full count from this call onward.
 *
 * @param stream The audio stream to update.
 * @param loopLimit Maximum number of loop restarts, or 0 (the default) to
 *                   loop forever.
 */
 void audioStreamSetLoopLimit(audiostream_t *stream, const uint32_t loopLimit);
 /**
 * Updates the given audio stream, decoding new data and advancing playback
 * as needed. Should be called every frame for every active stream.
 *
 * @param stream The audio stream to update.
 * @return Error indicating success or failure.
 */
 errorret_t audioStreamUpdate(audiostream_t *stream);
 /**
 * Disposes the audio stream, stopping playback and releasing any resources
 * associated with it.
 *
 * @param stream The audio stream to dispose.
 * @return Error indicating success or failure.
 */
 errorret_t audioStreamDispose(audiostream_t *stream);
@@ -0,0 +1,167 @@
 /**
 * Copyright (c) 2026 Dominic Masters
 *
 * This software is released under the MIT License.
 * https://opensource.org/licenses/MIT
 */
 #include "audiostreammp3.h"
 #include "audiostream.h"
 #include "assert/assert.h"
 #include "util/math.h"
 #include "util/memory.h"
 errorret_t audioStreamMp3Init(audiostream_t *stream) {
  assertNotNull(stream, "Stream cannot be NULL.");
  assertNotNull(stream->asset, "Stream must have an asset assigned.");
  assertTrue(
    stream->asset->type == ASSET_LOADER_TYPE_MP3,
    "Asset is not an MP3 file."
  );
  const assetmp3file_t *mp3 = &stream->asset->data.mp3;
  stream->type = AUDIO_STREAM_TYPE_MP3;
  stream->sampleRate = mp3->sampleRate;
  stream->channels = mp3->channels;
  stream->duration = (float_t) mp3->totalFrames / (float_t) mp3->sampleRate;
  stream->mp3.pendingFrames = 0;
  stream->mp3.pendingPosition = 0;
  stream->mp3.position = 0;
  stream->mp3.totalFrames = mp3->totalFrames;
  // Each stream opens its own independent handle to the same underlying
  // asset file - see audiostreampcm.c's audioStreamPcmInit() for why.
  errorChain(assetFileInit(
    &stream->mp3.file, stream->asset->name, NULL, NULL
  ));
  errorChain(assetFileOpen(&stream->mp3.file));
  errorChain(assetFileRead(&stream->mp3.file, NULL, mp3->dataOffset));
  errorChain(audioStreamMp3DecoderInit(stream));
  errorChain(audioStreamPlatformInit(stream));
  errorOk();
 }
 errorret_t audioStreamMp3Dispose(audiostream_t *stream) {
  assertNotNull(stream, "Stream cannot be NULL.");
  assertTrue(stream->type == AUDIO_STREAM_TYPE_MP3, "Stream is not MP3.");
  errorChain(audioStreamMp3DecoderDispose(stream));
  errorChain(assetFileClose(&stream->mp3.file));
  errorChain(assetFileDispose(&stream->mp3.file));
  errorOk();
 }
 size_t audioStreamMp3GetTotalFrames(const audiostream_t *stream) {
  assertNotNull(stream, "Stream cannot be NULL.");
  assertTrue(stream->type == AUDIO_STREAM_TYPE_MP3, "Stream is not MP3.");
  return stream->mp3.totalFrames;
 }
 errorret_t audioStreamMp3Seek(audiostream_t *stream, const size_t frame) {
  assertNotNull(stream, "Stream cannot be NULL.");
  assertTrue(stream->type == AUDIO_STREAM_TYPE_MP3, "Stream is not MP3.");
  if(frame == stream->mp3.position) {
    errorOk();
  }
  // Every seek - forward or backward - restarts decoding from the very
  // start of the compressed stream and discards frames until reaching the
  // target; see this file's own header comment for why MP3 has no cheaper
  // option, unlike audioStreamPcmSeek()'s direct byte-offset seek.
  errorChain(audioStreamMp3DecoderRewind(stream));
  stream->mp3.position = 0;
  stream->mp3.pendingFrames = 0;
  stream->mp3.pendingPosition = 0;
  const size_t channels = stream->channels;
  int16_t discard[AUDIO_MP3_MAX_SAMPLES_PER_FRAME];
  while(stream->mp3.position < frame) {
    size_t decodedFrames = 0;
    errorChain(
      audioStreamMp3DecoderDecodeFrame(stream, discard, &decodedFrames)
    );
    if(decodedFrames == 0) {
      // Ran out of stream before reaching the target - clamp rather than
      // erroring, same tolerance audioStreamPcmRead() has for a
      // shorter-than-declared asset.
      break;
    }
    const size_t framesNeeded = frame - stream->mp3.position;
    if(decodedFrames <= framesNeeded) {
      stream->mp3.position += decodedFrames;
      continue;
    }
    // This frame overshoots the target - keep the excess as pending so
    // the next Read() starts exactly at `frame` instead of skipping past
    // it.
    const size_t keepFrames = decodedFrames - framesNeeded;
    memoryMove(
      discard, discard + (framesNeeded * channels),
      keepFrames * channels * sizeof(int16_t)
    );
    memoryCopy(
      stream->mp3.pending, discard, keepFrames * channels * sizeof(int16_t)
    );
    stream->mp3.pendingFrames = keepFrames;
    stream->mp3.pendingPosition = 0;
    stream->mp3.position = frame;
  }
  errorOk();
 }
 errorret_t audioStreamMp3Read(
  audiostream_t *stream,
  int16_t *buffer,
  const size_t frameCount,
  size_t *outFramesRead
 ) {
  assertNotNull(stream, "Stream cannot be NULL.");
  assertNotNull(buffer, "Buffer cannot be NULL.");
  assertNotNull(outFramesRead, "outFramesRead cannot be NULL.");
  assertTrue(stream->type == AUDIO_STREAM_TYPE_MP3, "Stream is not MP3.");
  const size_t channels = stream->channels;
  size_t framesWritten = 0;
  while(framesWritten < frameCount) {
    if(stream->mp3.pendingPosition >= stream->mp3.pendingFrames) {
      size_t decodedFrames = 0;
      errorChain(audioStreamMp3DecoderDecodeFrame(
        stream, stream->mp3.pending, &decodedFrames
      ));
      stream->mp3.pendingFrames = decodedFrames;
      stream->mp3.pendingPosition = 0;
      if(decodedFrames == 0) break; // Genuine end of stream.
    }
    const size_t framesAvailable =
      stream->mp3.pendingFrames - stream->mp3.pendingPosition;
    const size_t framesToCopy =
      mathMin(frameCount - framesWritten, framesAvailable);
    memoryCopy(
      buffer + (framesWritten * channels),
      stream->mp3.pending + (stream->mp3.pendingPosition * channels),
      framesToCopy * channels * sizeof(int16_t)
    );
    stream->mp3.pendingPosition += framesToCopy;
    framesWritten += framesToCopy;
  }
  stream->mp3.position += framesWritten;
  *outFramesRead = framesWritten;
  errorOk();
 }
@@ -0,0 +1,140 @@
 /**
 * Copyright (c) 2026 Dominic Masters
 *
 * This software is released under the MIT License.
 * https://opensource.org/licenses/MIT
 */
 #pragma once
 #include "error/error.h"
 #include "asset/assetfile.h"
 #include "audio/audiostreammp3decoder.h"
 typedef struct audiostream_s audiostream_t;
 // How many interleaved PCM samples (not frames - samples, i.e. frames *
 // channels) a single audioStreamMp3DecoderDecodeFrame() call is ever
 // allowed to produce. Sizes the pending-sample buffer below, which every
 // decoder backend writes directly into - this must be sized to the
 // largest of them, not just "one MPEG frame":
 //  - libmad (software, Linux/Dolphin): always exactly one frame, 1152
 //    samples/channel for MPEG-1 Layer III, doubled here for stereo.
 //  - sceMp3 (hardware, PSP): its own pcmBuf is provisioned at double that
 //    (see AUDIO_MP3_PSP_PCM_BUF_SIZE) - i.e. sceMp3Decode() can
 //    legitimately hand back more than one frame's worth in a single call.
 //    Sizing this for only one frame silently overflowed stream->mp3.pending
 //    on real hardware whenever that happened - confirmed as the cause of
 //    very intermittent audio corruption/clicking, since it only bit when
 //    sceMp3 actually returned the larger amount.
 // So this covers the larger (PSP) case; libmad's decode is safely well
 // within it.
 #define AUDIO_MP3_MAX_SAMPLES_PER_FRAME (1152 * 2 * 2)
 typedef struct {
  // This stream's own private handle into its asset's underlying file -
  // see audiostreampcm_t.file's own comment for why this isn't shared
  // across streams playing the same asset. Holds compressed MP3 bytes;
  // the decoder backend (audiostreammp3decoder.h) reads from it directly.
  assetfile_t file;
  // Opaque per-platform decoder state - a reserved sceMp3 handle plus its
  // buffers on PSP, or libmad's mad_stream/mad_frame/mad_synth state plus a
  // sliding compressed-byte window on the libmad-based software backend
  // (Linux/Dolphin). Defined by whichever audiostreammp3decoder.h is
  // actually visible when this file is compiled - see that header's own
  // comment.
  audiostreammp3decoder_t decoder;
  // One decoded MPEG frame's worth of PCM, held here across Read() calls
  // since a frame (576 or 1152 samples/channel) rarely lines up exactly
  // with whatever frameCount a caller asks for. pendingPosition marks how
  // many of the first pendingFrames frames have already been consumed.
  int16_t pending[AUDIO_MP3_MAX_SAMPLES_PER_FRAME];
  size_t pendingFrames;
  size_t pendingPosition;
  // Current logical PCM frame position, relative to the start of the
  // decoded stream - decoding is push-forward-only (see
  // audioStreamMp3Seek()'s own comment on why a backward seek re-decodes
  // from the start rather than truly random-accessing).
  size_t position;
  // Total decoded PCM frame count for the whole clip - copied from the
  // asset's parsed metadata at Init (see assetmp3file_t.totalFrames),
  // exact if a Xing/Info header was present, otherwise an estimate.
  size_t totalFrames;
 } audiostreammp3_t;
 /**
 * Configures the given MP3 audio stream from its already-assigned asset
 * (see audiostream_t.asset - set by audioStreamInit(), which is what
 * should be calling this, not application code directly): opens this
 * stream's own private file handle onto the asset's compressed MPEG data,
 * and initializes the platform decoder backend
 * (audioStreamMp3DecoderInit()).
 *
 * Must be called after stream->asset is set and before audioStreamPlay().
 *
 * @param stream The audio stream to configure.
 * @return Error indicating success or failure.
 */
 errorret_t audioStreamMp3Init(audiostream_t *stream);
 /**
 * Disposes the given MP3 audio stream's decoder backend and private file
 * handle.
 *
 * @param stream The audio stream to dispose.
 * @return Error indicating success or failure.
 */
 errorret_t audioStreamMp3Dispose(audiostream_t *stream);
 /**
 * Returns the total number of frames (one sample per channel) available in
 * the stream's underlying MP3 data - see assetmp3file_t.totalFrames's own
 * comment on why this is sometimes an estimate rather than an exact count,
 * unlike audioStreamPcmGetTotalFrames().
 *
 * @param stream The audio stream to query. Must be AUDIO_STREAM_TYPE_MP3.
 * @return The total number of frames available.
 */
 size_t audioStreamMp3GetTotalFrames(const audiostream_t *stream);
 /**
 * Seeks the stream's decode position to the given frame offset. Unlike
 * audioStreamPcmSeek(), this is never cheap: MPEG frames aren't
 * independently decodable (each one's bit reservoir can depend on data
 * carried over from prior frames), so there's no equivalent of PCM's
 * direct byte-offset seek - every call, forward or backward, rewinds the
 * decoder to the very start of the compressed stream and decodes (and
 * discards) frames until reaching the target. Acceptable for this engine's
 * actual use (looping background music, where loopTo is typically near
 * the start anyway), but a real, non-constant cost for a seek deep into a
 * long track.
 *
 * @param stream The audio stream to seek. Must be AUDIO_STREAM_TYPE_MP3.
 * @param frame Frame offset to seek to, relative to the start of the
 *              decoded stream.
 * @return Error indicating success or failure.
 */
 errorret_t audioStreamMp3Seek(audiostream_t *stream, const size_t frame);
 /**
 * Reads up to frameCount frames of PCM sample data from the stream's
 * current position, advancing it by however many frames were actually
 * read. Reads fewer than frameCount (down to zero) once the underlying
 * MP3 data is exhausted, rather than erroring - same contract as
 * audioStreamPcmRead().
 *
 * @param stream The audio stream to read from. Must be AUDIO_STREAM_TYPE_MP3.
 * @param buffer Destination buffer, sized for at least frameCount frames.
 * @param frameCount Maximum number of frames to read.
 * @param outFramesRead Set to the number of frames actually read.
 * @return Error indicating success or failure.
 */
 errorret_t audioStreamMp3Read(
  audiostream_t *stream,
  int16_t *buffer,
  const size_t frameCount,
  size_t *outFramesRead
 );
@@ -0,0 +1,179 @@
 /**
 * Copyright (c) 2026 Dominic Masters
 *
 * This software is released under the MIT License.
 * https://opensource.org/licenses/MIT
 */
 #include "audiostreampcm.h"
 #include "audiostream.h"
 #include "assert/assert.h"
 #include "util/math.h"
 #include "util/memory.h"
 #include "util/endian.h"
 errorret_t audioStreamPcmInit(audiostream_t *stream) {
  assertNotNull(stream, "Stream cannot be NULL.");
  assertNotNull(stream->asset, "Stream must have an asset assigned.");
  assertTrue(
    stream->asset->type == ASSET_LOADER_TYPE_WAV,
    "Asset is not a WAV file."
  );
  assetwavfile_t *wav = &stream->asset->data.wav;
  stream->type = AUDIO_STREAM_TYPE_PCM;
  stream->sampleRate = wav->sampleRate;
  stream->channels = wav->channels;
  stream->duration = (
    (float_t) audioStreamPcmGetTotalFrames(stream) /
    (float_t) wav->sampleRate
  );
  // Each stream opens its own independent handle to the same underlying
  // asset file, rather than sharing a single handle on the asset entry -
  // multiple streams playing the same asset concurrently (e.g. two
  // simultaneous plays of the same sound effect) would otherwise fight
  // over one shared read position. This isn't the final answer for that
  // (a shared decode/cache layer would scale better than N independent
  // decompression streams of the same data), but it's a correct one for
  // now - a problem to revisit once it actually matters.
  errorChain(assetFileInit(
    &stream->pcm.file, stream->asset->name, NULL, NULL
  ));
  errorChain(assetFileOpen(&stream->pcm.file));
  errorChain(assetFileRead(&stream->pcm.file, NULL, wav->dataOffset));
  errorChain(audioStreamPlatformInit(stream));
  errorOk();
 }
 errorret_t audioStreamPcmDispose(audiostream_t *stream) {
  assertNotNull(stream, "Stream cannot be NULL.");
  assertTrue(stream->type == AUDIO_STREAM_TYPE_PCM, "Stream is not PCM.");
  errorChain(assetFileClose(&stream->pcm.file));
  errorChain(assetFileDispose(&stream->pcm.file));
  errorOk();
 }
 size_t audioStreamPcmGetTotalFrames(const audiostream_t *stream) {
  assertNotNull(stream, "Stream cannot be NULL.");
  assertTrue(stream->type == AUDIO_STREAM_TYPE_PCM, "Stream is not PCM.");
  const assetwavfile_t *wav = &stream->asset->data.wav;
  const size_t sourceFrameSize = (
    stream->channels * (wav->bitsPerSample / 8)
  );
  return wav->dataSize / sourceFrameSize;
 }
 errorret_t audioStreamPcmSeek(audiostream_t *stream, const size_t frame) {
  assertNotNull(stream, "Stream cannot be NULL.");
  assertTrue(stream->type == AUDIO_STREAM_TYPE_PCM, "Stream is not PCM.");
  assetwavfile_t *wav = &stream->asset->data.wav;
  const size_t sourceFrameSize = (
    stream->channels * (wav->bitsPerSample / 8)
  );
  const size_t targetByte = wav->dataOffset + (frame * sourceFrameSize);
  assertTrue(
    frame * sourceFrameSize <= wav->dataSize,
    "Seek frame is beyond the end of the PCM data."
  );
  const size_t currentByte = (size_t) stream->pcm.file.position;
  if(targetByte < currentByte) {
    // A rewind is needed to move the read cursor earlier once it's
    // already advanced past a point - assetFileRewind() takes the cheap
    // in-place seek path since every dusk.dsk entry is stored
    // uncompressed.
    errorChain(assetFileRewind(&stream->pcm.file));
    errorChain(assetFileRead(&stream->pcm.file, NULL, targetByte));
  } else if(targetByte > currentByte) {
    errorChain(assetFileRead(
      &stream->pcm.file, NULL, targetByte - currentByte
    ));
  }
  errorOk();
 }
 errorret_t audioStreamPcmRead(
  audiostream_t *stream,
  int16_t *buffer,
  const size_t frameCount,
  size_t *outFramesRead
 ) {
  assertNotNull(stream, "Stream cannot be NULL.");
  assertNotNull(buffer, "Buffer cannot be NULL.");
  assertNotNull(outFramesRead, "outFramesRead cannot be NULL.");
  assertTrue(stream->type == AUDIO_STREAM_TYPE_PCM, "Stream is not PCM.");
  assetwavfile_t *wav = &stream->asset->data.wav;
  const size_t channels = stream->channels;
  const size_t sourceSampleBytes = wav->bitsPerSample / 8;
  const size_t sourceFrameSize = channels * sourceSampleBytes;
  const size_t dataEndByte = wav->dataOffset + wav->dataSize;
  const size_t currentByte = (size_t) stream->pcm.file.position;
  const size_t bytesAvailable = (
    currentByte < dataEndByte ? dataEndByte - currentByte : 0
  );
  const size_t framesAvailable = bytesAvailable / sourceFrameSize;
  const size_t framesToRead = mathMin(frameCount, framesAvailable);
  if(framesToRead == 0) {
    *outFramesRead = 0;
    errorOk();
  }
  if(sourceSampleBytes == sizeof(int16_t)) {
    // Output format already matches the source in width, but WAV samples
    // are always little-endian per the format spec regardless of host -
    // read straight through, then fix up byte order in place. A no-op on
    // every little-endian platform (endianLittleToHost16() compiles down
    // to returning its argument unchanged there) - only actually swaps
    // anything on a big-endian host (Dolphin/GameCube/Wii).
    errorChain(assetFileRead(
      &stream->pcm.file, buffer, framesToRead * sourceFrameSize
    ));
    const size_t sampleCount = framesToRead * channels;
    for(size_t i = 0; i < sampleCount; i++) {
      buffer[i] = (int16_t) endianLittleToHost16((uint16_t) buffer[i]);
    }
  } else {
    // 24-bit source (the only other width assetWavParseHeader() accepts) -
    // read the raw 3-byte samples into a scratch buffer, then truncate
    // each down to 16-bit, since none of PSP/Dolphin's audio hardware (or
    // SDL2 on Linux) accepts anything wider - see assetwavfile_t's own
    // comment on bitsPerSample.
    assertTrue(sourceSampleBytes == 3, "Unsupported PCM sample width.");
    const size_t rawBytes = framesToRead * sourceFrameSize;
    uint8_t *raw = memoryAllocate(rawBytes);
    errorret_t ret = assetFileRead(&stream->pcm.file, raw, rawBytes);
    if(errorIsNotOk(ret)) {
      memoryFree(raw);
      errorChain(ret);
    }
    // 24-bit PCM samples are little-endian two's complement - the top two
    // bytes of each (indices 1 and 2) already form that same value
    // truncated to 16-bit (equivalent to an arithmetic right-shift by 8
    // bits, which preserves the sign correctly since byte 2 carries it).
    const size_t sampleCount = framesToRead * channels;
    for(size_t i = 0; i < sampleCount; i++) {
      const uint8_t *sample = raw + (i * 3);
      buffer[i] = (int16_t) (sample[1] | (sample[2] << 8));
    }
    memoryFree(raw);
  }
  *outFramesRead = framesToRead;
  errorOk();
 }
@@ -0,0 +1,96 @@
 /**
 * Copyright (c) 2026 Dominic Masters
 *
 * This software is released under the MIT License.
 * https://opensource.org/licenses/MIT
 */
 #pragma once
 #include "error/error.h"
 #include "asset/assetfile.h"
 typedef struct audiostream_s audiostream_t;
 typedef struct {
  // This stream's own private handle into its asset's underlying file -
  // deliberately not shared with any other stream reading the same asset
  // (see audioStreamPcmInit's own comment for why). Its read cursor is
  // what audioStreamPcmRead()/audioStreamPcmSeek() operate on.
  assetfile_t file;
 } audiostreampcm_t;
 /**
 * Configures the given PCM audio stream from its already-assigned asset
 * (see audiostream_t.asset - set by audioStreamInit(), which is what
 * should be calling this, not application code directly) rather than
 * taking raw decoded data: sampleRate/channels/duration are read from the
 * asset's parsed WAV header, and a private file handle is opened for
 * reading sample data on demand as playback consumes it (see
 * audioStreamPcmRead()) - the PCM data itself is never read into memory
 * all at once, so this works the same regardless of how long the
 * underlying clip is.
 *
 * Must be called after stream->asset is set and before audioStreamPlay().
 *
 * @param stream The audio stream to configure.
 * @return Error indicating success or failure.
 */
 errorret_t audioStreamPcmInit(audiostream_t *stream);
 /**
 * Disposes the given PCM audio stream's own private file handle.
 *
 * @param stream The audio stream to dispose.
 * @return Error indicating success or failure.
 */
 errorret_t audioStreamPcmDispose(audiostream_t *stream);
 /**
 * Returns the total number of frames (one sample per channel) available
 * in the stream's underlying PCM data - NOT simply the asset's declared
 * byte size divided by a 16-bit frame size, since the source data isn't
 * always 16-bit even though audioStreamPcmRead() always produces 16-bit
 * output (see assetwavfile_t.bitsPerSample). Platform backends should use
 * this rather than computing frame counts from dataSize themselves.
 *
 * @param stream The audio stream to query. Must be AUDIO_STREAM_TYPE_PCM.
 * @return The total number of frames available.
 */
 size_t audioStreamPcmGetTotalFrames(const audiostream_t *stream);
 /**
 * Seeks the stream's private read cursor to the given frame offset
 * (relative to the start of the PCM data - the same units as
 * audiostream_t's startFrame/loopStart/loopTo, once converted from
 * seconds). Seeking backward re-reads from the start of the underlying
 * asset file (see assetFileRewind()), which is a cheap in-place seek
 * since every dusk.dsk entry is stored uncompressed.
 *
 * @param stream The audio stream to seek. Must be AUDIO_STREAM_TYPE_PCM.
 * @param frame Frame offset to seek to, relative to the start of the PCM
 *              data.
 * @return Error indicating success or failure.
 */
 errorret_t audioStreamPcmSeek(audiostream_t *stream, const size_t frame);
 /**
 * Reads up to frameCount frames of PCM sample data from the stream's
 * current read position, advancing it by however many frames were
 * actually read. Reads fewer than frameCount (down to zero) once the
 * underlying asset's PCM data is exhausted, rather than erroring - it's
 * up to the caller (platform code, which already knows about loop points)
 * to request no more than what it wants read from within the current
 * loop segment or the true end of the clip.
 *
 * @param stream The audio stream to read from. Must be AUDIO_STREAM_TYPE_PCM.
 * @param buffer Destination buffer, sized for at least frameCount frames.
 * @param frameCount Maximum number of frames to read.
 * @param outFramesRead Set to the number of frames actually read.
 * @return Error indicating success or failure.
 */
 errorret_t audioStreamPcmRead(
  audiostream_t *stream,
  int16_t *buffer,
  const size_t frameCount,
  size_t *outFramesRead
 );
--- a/Show More
+++ b/Show More
		`@@ -0,0 +1 @@`
							{"meshes":[{"file":"house_4_4.dmf","pos":[2,1,0]},{"file":"house_6_3.dmf","pos":[1,9,0]},{"file":"house_2_2.dmf","pos":[12,6,0]}],"tiles":[[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],null,null,null,null,[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],null,null,null,null,[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],null,null,null,null,[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],null,null,null,null,[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],null,null,[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],null,null,[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],null,null,null,null,null,null,[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],null,null,null,null,null,null,[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],null,null,null,null,null,null,[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0]]}
		`@@ -0,0 +1 @@`
							{"tiles":[[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],null,null,null,null,null,[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],null,null,null,null,null,[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],null,null,null,null,null,[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[6,0],[2,0],[2,0],[2,0],[2,0],[2,0],[2,0],[7,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[3,0],[1,1],[1,1],[1,1],[1,1],[1,1],[1,1],[5,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[3,0],[1,1],[1,1],[1,1],[1,1],[1,1],[1,1],[5,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[3,0],[1,1],[1,1],[1,1],[1,1],[1,1],[1,1],[5,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[8,0],[4,0],[4,0],[4,0],[12,0],[1,1],[1,1],[5,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[3,0],[1,1],[1,1],[5,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[3,0],[1,1],[1,1],[5,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[8,0],[4,0],[4,0],[9,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0]],"meshes":[{"file":"house_5_3.dmf","pos":[1,1,0]}],"entities":[{"type":"global","globalId":3,"pos":[8,8,1]},{"type":"item","itemId":1,"quantity":1,"pos":[12,2,0]}],"areas":[{"min":[11,3,0],"max":[16,9,10],"callbackId":1,"notify":3,"trigger":6}]}
		`@@ -0,0 +1 @@`
							{"meshes":[{"file":"house_8_4.dmf","pos":[1,1,0]},{"file":"house_3_3.dmf","pos":[11,2,0]},{"file":"house_2_2.dmf","pos":[3,11,0]}],"tiles":[[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],null,null,null,null,null,null,null,null,[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],null,null,null,null,null,null,null,null,[1,0],[1,0],null,null,null,[1,0],[1,0],[1,0],null,null,null,null,null,null,null,null,[1,0],[1,0],null,null,null,[1,0],[1,0],[1,0],null,null,null,null,null,null,null,null,[1,0],[1,0],null,null,null,[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],null,null,[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],null,null,[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0]]}
		`@@ -0,0 +1 @@`
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		`@@ -0,0 +1 @@`
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