Perfected Audio

src/dawn/asset/AssetManager.hpp

@@ -7,6 +7,7 @@
 #include "Asset.hpp"
 #include "util/array.hpp"
 
+#include "assets/AudioAsset.hpp"
 #include "assets/LanguageAsset.hpp"
 #include "assets/TextureAsset.hpp"
 #include "assets/TilesetAsset.hpp"

src/dawn/asset/assets/AudioAsset.cpp

@@ -0,0 +1,77 @@
+// Copyright (c) 2023 Dominic Masters
+// 
+// This software is released under the MIT License.
+// https://opensource.org/licenses/MIT
+
+#include "AudioAsset.hpp"
+
+using namespace Dawn;
+
+AudioAsset::AudioAsset(AssetManager *man, std::string name) :
+  Asset(man, name),
+  loader(name + ".audio")
+{
+
+}
+
+void AudioAsset::updateSync() {
+  if(this->state != 0x07) return;
+
+  // THIS WILL DEFINITELY CHANGE
+  this->state = 0x08;
+  this->loaded = true;
+  this->eventLoaded.invoke();
+}
+
+void AudioAsset::updateAsync() {
+  if(this->state != 0x00) return;
+  char *start, *end;
+  char buffer[1024];
+
+  // Open asset for reading
+  this->state = 0x01;
+  this->loader.open();
+
+  // Parse header data.
+  this->state = 0x02;
+  this->loader.read((uint8_t *)buffer, 1024);
+
+  // Channel count
+  this->state = 0x03;
+  start = buffer;
+  end = strchr(start, '|');
+  *end = '\0';
+  this->channelCount = atoi(start);
+  assertTrue(this->channelCount > 0);
+
+  // Sample Rate
+  this->state = 0x04;
+  start = end + 1;
+  end = strchr(start, '|');
+  *end = '\0';
+  this->sampleRate = (uint32_t)strtoul(start, NULL, 10);
+  assertTrue(this->sampleRate > 0);
+
+  // Number of samples per channel
+  this->state = 0x05;
+  start = end + 1;
+  end = strchr(start, '|');
+  *end = '\0';
+  this->samplesPerChannel = atoi(start);
+  assertTrue(this->samplesPerChannel > 0);
+
+  // Total Data Length
+  this->state = 0x06;
+  start = end + 1;
+  end = strchr(start, '|');
+  *end = '\0';
+  this->bufferSize = (size_t)atoll(start);
+  assertTrue(this->bufferSize > 0);
+
+  // Determine frame size
+  this->frameSize = sizeof(int16_t) * this->channelCount;
+
+  // Indicated start of data
+  this->state = 0x07;
+  this->bufferStart = end - buffer;
+}

src/dawn/asset/assets/AudioAsset.hpp

@@ -0,0 +1,33 @@
+// Copyright (c) 2023 Dominic Masters
+// 
+// This software is released under the MIT License.
+// https://opensource.org/licenses/MIT
+
+#pragma once
+#include "../Asset.hpp"
+#include "../AssetLoader.hpp"
+
+namespace Dawn {
+  class AudioSource;
+
+  class AudioAsset : public Asset {
+    protected:
+      AssetLoader loader;
+      uint8_t state = 0x00;
+
+      int32_t channelCount;
+      uint32_t sampleRate;
+      int32_t samplesPerChannel;
+      size_t bufferSize;
+      size_t bufferStart;
+      size_t frameSize;
+
+    public:
+      AudioAsset(AssetManager *man, std::string name);
+
+      void updateSync() override;
+      void updateAsync() override;
+
+      friend class AudioSource;
+  };
+}

src/dawn/asset/assets/CMakeLists.txt

@@ -6,6 +6,7 @@
 # Sources
 target_sources(${DAWN_TARGET_NAME}
   PRIVATE
+    AudioAsset.cpp
     LanguageAsset.cpp
     TextureAsset.cpp
     TilesetAsset.cpp

src/dawn/scene/components/scene/SubSceneController.hpp

@@ -15,7 +15,7 @@ namespace Dawn {
       void onSceneUnpausedUpdate();
 
     public:
-      bool_t onlyUpdateUnpaused = true;
+      bool_t onlyUpdateUnpaused = false;
 
       SubSceneController(SceneItem *item);
 

src/dawnopenal/CMakeLists.txt

@@ -7,7 +7,6 @@
 target_link_libraries(${DAWN_TARGET_NAME}
   PUBLIC
     OpenAL
-    AudioFile
 )
 
 # Includes

src/dawnopenal/audio/AudioData.cpp

@@ -1,82 +0,0 @@
-// Copyright (c) 2023 Dominic Masters
-// 
-// This software is released under the MIT License.
-// https://opensource.org/licenses/MIT
-
-#include "AudioData.hpp"
-
-using namespace Dawn;
-
-AudioData::AudioData() {
-
-}
-
-void AudioData::init() {
-  alGenBuffers((ALsizei)1, &this->buffer);
-
-  // Test
-  AudioFile<double> audioFile;
-  audioFile.load ("C:\\sample.wav");
-  audioFile.printSummary();
-
-  ALenum format;
-  switch(audioFile.getBitDepth()) {
-    case 16:
-      switch(audioFile.getNumChannels()) {
-        case 2:
-          format = AL_FORMAT_STEREO16;
-          break;
-        case 1:
-          format = AL_FORMAT_MONO16;
-          break;
-        default:
-          assertUnreachable();
-      }
-      break;
-
-    case 8:
-      switch(audioFile.getNumChannels()) {
-        case 2:
-          format = AL_FORMAT_STEREO8;
-          break;
-        case 1:
-          format = AL_FORMAT_MONO8;
-          break;
-        default:
-          assertUnreachable();
-      }
-      break;
-    
-    default:
-      assertUnreachable();
-  }
-
-  format = AL_FORMAT_MONO16;
-
-  std::vector<uint8_t> data;
-  for (int i = 0; i < audioFile.getNumSamplesPerChannel(); i++) {
-    // for(int y = 0; y < audioFile.getNumChannels(); y++) {
-    for(int y = 0; y < 1; y++) {
-      double sample = audioFile.samples[y][i];
-      sample = mathClamp(sample, -1., 1.);
-      auto q = static_cast<int16_t> (sample * 32767.);
-      
-      uint8_t bytes[2];
-      bytes[0] = (q >> 8) & 0xFF;
-      bytes[1] = q & 0xFF;
-      data.push_back(bytes[1]);
-      data.push_back(bytes[0]);
-    }
-  }
-  alBufferData(buffer, format, &data[0], data.size(), audioFile.getSampleRate());
-
-
-
-
-
-  this->ready = true;
-}
-
-AudioData::~AudioData() {
-  if(this->ready) alDeleteBuffers((ALsizei)1, &this->buffer);
-}

src/dawnopenal/audio/AudioData.hpp

@@ -1,31 +0,0 @@
-// Copyright (c) 2023 Dominic Masters
-// 
-// This software is released under the MIT License.
-// https://opensource.org/licenses/MIT
-
-#pragma once
-#include "dawnlibs.hpp"
-#include "dawnopenal.hpp"
-#include "assert/assert.hpp"
-#include "util/mathutils.hpp"
-
-namespace Dawn {
-  class AudioSource;
-
-  class AudioData {
-    private:
-      ALuint buffer;
-      bool_t ready = false;
-      ALenum format;
-
-    public:
-
-      AudioData();
-
-      void init();
-
-      ~AudioData();
-
-      friend class AudioSource;
-  };
-}

src/dawnopenal/audio/CMakeLists.txt

@@ -6,6 +6,5 @@
 # Sources
 target_sources(${DAWN_TARGET_NAME}
   PRIVATE
-    AudioData.cpp
     AudioManager.cpp
 )

src/dawnopenal/dawnopenal.hpp

@@ -6,4 +6,3 @@
 #pragma once
 #include <AL/al.h>
 #include <AL/alc.h>
-#include "AudioFile.h"

src/dawnopenal/scene/components/audio/AudioSource.cpp

@@ -12,146 +12,120 @@ AudioSource::AudioSource(SceneItem *i) : SceneItemComponent(i) {
 
 }
 
-void AudioSource::updateAudioSource() {
-  if(!this->ready || data == nullptr || !data->ready) return;
 
-  switch(this->requestedAudioState) {
+void AudioSource::fillBuffer(ALuint buffer) {
-    // When the engine wants the sound to stop
+  // Read in some data
-    case AUDIO_SOURCE_STATE_STOPPED:
+  uint8_t *temporaryBuffer = (uint8_t*)memoryAllocate(AUDIO_SOURCE_BUFFER_SIZE);
-      if(this->currentAudioState == AUDIO_SOURCE_STATE_STOPPED) return;
+  /*
-      this->currentAudioState = AUDIO_SOURCE_STATE_STOPPED;
+    OK A big writeup here because things get complicated and I am sure that I 
-      alSourceStop(this->source);
+    will need to revist this.
-      this->eventStopped.invoke();
-      break;
 
-    // When the engine wants the sound to pause
+    First thing to note is that OpenAL requires that the data buffered is a 
-    case AUDIO_SOURCE_STATE_PAUSED:
+    multiple of the frame size. Frame Size from what I can tell is;
-      if(this->currentAudioState != AUDIO_SOURCE_STATE_PLAYING) return;
+    dataSize * channelCount
-      this->currentAudioState = AUDIO_SOURCE_STATE_PAUSED;
+    e.g. sizeof(int16_t) * stereo = 4
-      alSourcePause(this->source);
-      this->eventPaused.invoke();
-      break;
   
-    // When the engine wants the sound to play...
+    EDIT 23017 - Something about how OpenAL handles things means the following
-    case AUDIO_SOURCE_STATE_PLAYING:
+    statement is probably false, I'm leaving it here but DON'T READ IT PLEASE
-      switch(this->playMode) {
-        // This should be playing, right now.
-        case AUDIO_PLAY_MODE_ALWAYS:
-          if(this->currentAudioState == AUDIO_SOURCE_STATE_PLAYING) return;
-          this->currentAudioState = AUDIO_SOURCE_STATE_PLAYING;
-          alSourcePlay(this->source);
-          this->eventPlaying.invoke();
-          break;
 
-        case AUDIO_PLAY_MODE_UNPAUSED:
+    Additionally, we need to handle cases where the buffer "wraps around". So
-          if(this->getGame()->timeManager.isPaused) {
+    let's say we are at 8179/8192 bytes, we go to read "128 bytes", we need to
-            if(this->currentAudioState != AUDIO_SOURCE_STATE_PLAYING) return;
+    first read the remaining 13 bytes and then the remaining (128-13)bytes. 
-            this->currentAudioState = AUDIO_SOURCE_STATE_PAUSED;
+
-            alSourcePause(this->source);
+    After that we need to do our frame size division, and make sure we only 
-            this->eventPaused.invoke();
+    advance our buffer by that many bytes, so that the next buffer can pick up
+    exactly where this buffer left off.
+  */
+
+  // Try to read the entire buffer
+  this->data->loader.setPosition(this->data->bufferStart + bufferPosition);
+  size_t readLength = this->data->loader.read(
+    temporaryBuffer, AUDIO_SOURCE_BUFFER_SIZE
+  );
+
+  size_t bufferLength = (readLength / this->data->frameSize) * this->data->frameSize;
+  
+  // Did we run out of data?
+  size_t newPosition;
+  if(readLength < AUDIO_SOURCE_BUFFER_SIZE) {
+    newPosition = 0;
   } else {
-            if(this->currentAudioState == AUDIO_SOURCE_STATE_PLAYING) return;
+    newPosition = bufferPosition + bufferLength;
-            this->currentAudioState = AUDIO_SOURCE_STATE_PLAYING;
-            alSourcePlay(this->source);
-            this->eventPlaying.invoke();
   }
-          break;
 
+  // Determine format, may do this somewhere else for efficiency sake.
+  ALenum format;
+  switch(this->data->channelCount) {
+    case 2:
+      format = AL_FORMAT_STEREO16;
+      break;
+    case 1:
+      format = AL_FORMAT_MONO16;
+      break;
     default:
       assertUnreachable();
   }
-      break;
 
-    default:
+  // Buffer data
-      assertUnreachable();
+  alBufferData(
+    buffer, format, temporaryBuffer, bufferLength, (ALsizei)this->data->sampleRate
+  );
+
+  // Cleanup
+  memoryFree(temporaryBuffer);
+  bufferPosition = newPosition;
+}
+
+void AudioSource::detatchBuffers() {
+  ALint buffersQueued;
+  ALuint buffersUnqueued[AUDIO_SOURCE_BUFFER_COUNT];
+  alGetSourcei(this->source, AL_BUFFERS_QUEUED, &buffersQueued);
+  if(buffersQueued > 0) {
+    alSourceUnqueueBuffers(this->source, buffersQueued, buffersUnqueued);
   }
 }
 
+void AudioSource::attachBuffers() {
+  alSourceQueueBuffers(this->source, AUDIO_SOURCE_BUFFER_COUNT, this->buffers);
+}
+
 void AudioSource::onStart() {
+  // Create source and buffers
   alGenSources((ALuint)1, &this->source);
+  alGenBuffers((ALuint)AUDIO_SOURCE_BUFFER_COUNT, this->buffers);
+
+  // Set up the source positions
+  glm::vec3 position = this->transform->getLocalPosition();
+  alSource3f(this->source, AL_POSITION, position.x, position.y, position.z);
+  alSource3f(this->source, AL_VELOCITY, 0, 0, 0);
 
   // In future these will probably be tied to the layer
   alSourcef(this->source, AL_PITCH, 1);
   alSourcef(this->source, AL_GAIN, 1);
 
-  glm::vec3 position = this->transform->getLocalPosition();
+  // Mark as ready.
-  alSource3f(this->source, AL_POSITION, position.x, position.y, position.z);
-
-  // Velocity is always zero for now
-  alSource3f(this->source, AL_VELOCITY, 0, 0, 0);
-
-  // Looping
-  alSourcei(this->source, AL_LOOPING, this->loop);
-
-  // Source
-  if(this->data != nullptr && this->data->ready) {
-    alSourcei(source, AL_BUFFER, this->data->buffer);
-  }
-
-  // Ready.
   this->ready = true;
 
-  // Update the source now we are ready.
-  this->updateAudioSource();
-
   // Listen for events
   this->transform->eventTransformUpdated.addListener(this, &AudioSource::onTransformUpdate);
-  this->getGame()->timeManager.eventTimePaused.addListener(this, &AudioSource::onGamePause);
+  this->getScene()->eventSceneUpdate.addListener(this, &AudioSource::onSceneUpdate);
-  this->getGame()->timeManager.eventTimeResumed.addListener(this, &AudioSource::onGameUnpause);
-
-}
-
-bool_t AudioSource::isLooping() {
-  return this->loop;
-}
-
-void AudioSource::setLoop(bool_t loop) {
-  this->loop = loop;
-  if(this->ready) alSourcei(this->source, AL_LOOPING, loop);
-}
-
-AudioSourceState AudioSource::getPlayingState() {
-  return this->requestedAudioState;
-}
-
-void AudioSource::setPlayingState(enum AudioSourceState state) {
-  this->requestedAudioState = state;
-  this->updateAudioSource();
 }
 
 AudioSourceState AudioSource::getRealState() {
-  return this->currentAudioState;
+  return this->internalState;
 }
 
-void AudioSource::play() {
+void AudioSource::rewind() {
-  this->setPlayingState(AUDIO_SOURCE_STATE_PLAYING);
+  this->bufferPosition = 0;
 }
 
-void AudioSource::pause() {
+AudioAsset * AudioSource::getAudioData() {
-  this->setPlayingState(AUDIO_SOURCE_STATE_PAUSED);
-}
-
-void AudioSource::stop() {
-  this->setPlayingState(AUDIO_SOURCE_STATE_STOPPED);
-}
-
-// void AudioSource::rewind() {
-//   if(this->ready && data != nullptr && data->ready) {
-//     alSourceRewind(this->source);
-//   }
-// }
-
-AudioData * AudioSource::getAudioData() {
   return this->data;
 }
 
-void AudioSource::setAudioData(AudioData *data) {
+void AudioSource::setAudioData(AudioAsset *data) {
-  // Set up source.
-  if(this->ready && data != nullptr && data->ready) {
-    alSourcei(source, AL_BUFFER, data->buffer);
-  }
   this->data = data;
-  this->updateAudioSource();
+  this->rewind();
 }
 
 enum AudioSourcePlayMode AudioSource::getPlayMode() {
@@ -160,27 +134,116 @@ enum AudioSourcePlayMode AudioSource::getPlayMode() {
 
 void AudioSource::setPlayMode(enum AudioSourcePlayMode playMode) {
   this->playMode = playMode;
-  this->updateAudioSource();
 }
 
 void AudioSource::onDispose() {
-  this->transform->eventTransformUpdated.removeListener(this, &AudioSource::onTransformUpdate);
+  assertTrue(this->ready);
-  this->getGame()->timeManager.eventTimePaused.removeListener(this, &AudioSource::onGamePause);
-  this->getGame()->timeManager.eventTimeResumed.removeListener(this, &AudioSource::onGameUnpause);
-
   this->ready = false;
+
+  this->getScene()->eventSceneUpdate.removeListener(this, &AudioSource::onSceneUpdate);
+  this->transform->eventTransformUpdated.removeListener(this, &AudioSource::onTransformUpdate);
+
   alDeleteSources((ALuint)1, &this->source);
+  alDeleteBuffers((ALuint)AUDIO_SOURCE_BUFFER_COUNT, this->buffers);
+}
+
+void AudioSource::onSceneUpdate() {
+  ALuint bufferId;
+  ALint buffersProcessed;
+
+  assertTrue(this->ready);
+  assertTrue(this->data != nullptr);
+  assertTrue(this->data->loaded);
+
+  // What is the user trying to do?
+  if(this->state == AUDIO_SOURCE_STATE_PLAYING) {
+    // Handle the special game-paused music-paused state.
+    if(this->playMode == AUDIO_PLAY_MODE_UNPAUSED && this->getGame()->timeManager.isPaused) {
+      if(this->internalState == AUDIO_SOURCE_STATE_PLAYING) {
+        // Functionally, this is the same as pausing
+        alSourcePause(this->source);
+        this->internalState = AUDIO_SOURCE_STATE_PAUSED;
+      }
+      return;// Do nothing else, at all.
+    }
+
+    // They are trying to play. We need to check if we are already playing
+    if(this->internalState == AUDIO_SOURCE_STATE_PLAYING) {
+      // We are good to continue buffering audio data.
+      buffersProcessed = 0;
+      alGetSourcei(this->source, AL_BUFFERS_PROCESSED, &buffersProcessed);
+
+      while(buffersProcessed > 0) {
+        alSourceUnqueueBuffers(this->source, 1, &bufferId);
+        this->fillBuffer(bufferId);
+        alSourceQueueBuffers(this->source, 1, &bufferId);
+        buffersProcessed--;
+
+        // Now, before we go to the next buffer let's see if we need to
+        // update the internal state
+        if(this->bufferPosition != 0) continue;
+
+        // We reached the end of the buffer whilst filling. What to do now?
+        if(this->loop) {
+          // We're looping so it's fine
+          this->eventLooped.invoke();
+          continue;
+        }
+
+        // We are NOT looping, so we need to finish here.
+        this->state = AUDIO_SOURCE_STATE_STOPPED;
+        this->eventFinished.invoke();
+        this->bufferPosition = 0;
+        buffersProcessed = 0;
+      }
+    } else if(this->internalState == AUDIO_SOURCE_STATE_STOPPED) {
+      // Not yet playing. First thing we need to do is fill the buffers.
+      for(int32_t i = 0; i < AUDIO_SOURCE_BUFFER_COUNT; i++) {
+        this->fillBuffer(this->buffers[i]);
+      }
+
+      // Now attach the buffers
+      this->attachBuffers();
+
+      // And begin playing
+      alSourcePlay(this->source);
+      this->internalState = AUDIO_SOURCE_STATE_PLAYING;
+      this->eventPlaying.invoke();
+
+    } else if(AUDIO_SOURCE_STATE_PAUSED) {
+      // Request to resume
+      alSourcePlay(this->source);
+      this->eventResumed.invoke();
+      this->internalState = AUDIO_SOURCE_STATE_PLAYING;
+
+    } else {
+      assertUnreachable();
+    }
+  } else if(this->state == AUDIO_SOURCE_STATE_PAUSED) {
+    // Pause has been requested.
+    if(this->internalState != AUDIO_SOURCE_STATE_PLAYING) return;
+
+    // We are playing something, pause it
+    alSourcePause(this->source);
+    this->internalState = AUDIO_SOURCE_STATE_PAUSED;
+    this->eventPaused.invoke();
+
+  } else if(this->state == AUDIO_SOURCE_STATE_STOPPED) {
+    if(this->internalState == AUDIO_SOURCE_STATE_STOPPED) return;
+    
+    // Release the buffers
+    alSourceStop(this->source);
+    this->detatchBuffers();
+    this->internalState = AUDIO_SOURCE_STATE_STOPPED;
+    this->eventStopped.invoke();
+    this->bufferPosition = 0;
+
+  } else {
+    assertUnreachable();
+  }
 }
 
 void AudioSource::onTransformUpdate() {
   glm::vec3 position = this->transform->getWorldPosition();
   alSource3f(this->source, AL_POSITION, position.x, position.y, position.z);
 }
-
-void AudioSource::onGamePause() {
-  this->updateAudioSource();
-}
-
-void AudioSource::onGameUnpause() {
-  this->updateAudioSource();
-}

src/dawnopenal/scene/components/audio/AudioSource.hpp

@@ -6,7 +6,10 @@
 #pragma once
 #include "dawnopenal.hpp"
 #include "scene/SceneItemComponent.hpp"
-#include "audio/AudioData.hpp"
+#include "asset/assets/AudioAsset.hpp"
+
+#define AUDIO_SOURCE_BUFFER_COUNT 3
+#define AUDIO_SOURCE_BUFFER_SIZE 8192
 
 namespace Dawn {
   enum AudioSourceState {
@@ -24,13 +27,13 @@ namespace Dawn {
     private:
       ALuint source;
       bool_t ready = false;
+      ALuint buffers[AUDIO_SOURCE_BUFFER_COUNT];
+      size_t bufferPosition = 0;
 
       // Settings
-      bool_t loop = false;
+      enum AudioSourceState internalState = AUDIO_SOURCE_STATE_STOPPED;
-      enum AudioSourceState requestedAudioState = AUDIO_SOURCE_STATE_STOPPED;
-      enum AudioSourceState currentAudioState = AUDIO_SOURCE_STATE_STOPPED;
       int32_t layer = 0;
-      AudioData *data = nullptr;
+      AudioAsset *data = nullptr;
       AudioSourcePlayMode playMode = AUDIO_PLAY_MODE_UNPAUSED;
 
       /**
@@ -38,15 +41,24 @@ namespace Dawn {
        */
       void updateAudioSource();
 
+      void fillBuffer(ALuint buffer);
+      void detatchBuffers();
+      void attachBuffers();
+
       // Events
+      void onSceneUpdate();
       void onTransformUpdate();
-      void onGamePause();
-      void onGameUnpause();
 
     public:
+      bool_t loop = false;
+      enum AudioSourceState state = AUDIO_SOURCE_STATE_STOPPED;
+
       Event<> eventPlaying;
+      Event<> eventResumed;
       Event<> eventPaused;
       Event<> eventStopped;
+      Event<> eventFinished;
+      Event<> eventLooped;
 
       /**
        * Creates an Audio Source item component.
@@ -55,38 +67,6 @@ namespace Dawn {
        */
       AudioSource(SceneItem *item);
 
-      /**
-       * Returns whether or not the audio source is set to loop or not.
-       * 
-       * @return True if the source is looping otherwise false.
-       */
-      bool_t isLooping();
-
-      /**
-       * Sets whether the audio source should loop or not.
-       * 
-       * @param loop Loop or not.
-       */
-      void setLoop(bool_t loop);
-
-      /**
-       * Returns the requested playing state of the source. Due to some weird
-       * limitations of hardware, as well as some nice controls to decide how
-       * sources should play, this is basically "What you would like the sound
-       * to do" mode, so you really should be controlling this value where
-       * possible.
-       * 
-       * @return The requested playing state.
-       */
-      AudioSourceState getPlayingState();
-
-      /**
-       * Sets the ideal playing state you want of this audio source.
-       * 
-       * @param state State to set.
-       */
-      void setPlayingState(enum AudioSourceState state);
-
       /**
        * Returns the real current state of the sound. Refer to getPlayingState
        * but basically the actually requested play state and what the hardware
@@ -97,33 +77,18 @@ namespace Dawn {
        */
       AudioSourceState getRealState();
 
-      /**
-       * Plays the audio source.
-       */
-      void play();
-
-      /**
-       * Pauses the audio source.
-       */
-      void pause();
-
-      /**
-       * Stops the audio source.
-       */
-      void stop();
-
       /**
        * Rewinds the audio source. At the time of writing this comment (23017) I
        * am unsure of the behaviour when rewinding whilst the source is active.
        */
-      // void rewind();
+      void rewind();
 
       /**
        * Returns the current audio data for this source.
        * 
        * @return Audio data that is atached to this source.
        */
-      AudioData * getAudioData();
+      AudioAsset * getAudioData();
 
       /**
        * Sets the audio data for this source. Currently switching between the
@@ -131,7 +96,7 @@ namespace Dawn {
        * 
        * @param data Data to set.
        */
-      void setAudioData(AudioData *data);
+      void setAudioData(AudioAsset *data);
 
       /**
        * Returns the play mode for the source.

src/dawnpokergame/CMakeLists.txt

@@ -36,6 +36,8 @@ tool_tileset(tileset_death texture_death ${DIR_GAME_ASSETS}/characters/death/she
 
 tool_truetype(truetype_alice ${DIR_GAME_ASSETS}/font/Alice-Regular.ttf truetype_alice 2048 2048 120)
 
+tool_audio(audio_test borrowed/sample.wav)
+
 add_dependencies(${DAWN_TARGET_NAME}
   language_en
   language_jp
@@ -45,4 +47,6 @@ add_dependencies(${DAWN_TARGET_NAME}
   truetype_alice
   
   texture_test
+
+  audio_test
 )

src/dawnpokergame/scenes/Scene_1.hpp

@@ -7,7 +7,6 @@
 #include "scenes/PixelVNScene.hpp"
 #include "scenes/Scene_2.hpp"
 #include "prefabs/characters/DeathPrefab.hpp"
-
 #include "scene/components/audio/AudioListener.hpp"
 #include "scene/components/audio/AudioSource.hpp"
 
@@ -15,6 +14,12 @@ namespace Dawn {
   class Scene_1 : public PixelVNScene {
     protected:
       DeathPrefab *death;
+      AudioSource *source;
+
+      void onFinished() {
+        std::cout << "Finished" << std::endl;
+        source->rewind();
+      }
 
       void vnStage() override {
         PixelVNScene::vnStage();
@@ -23,15 +28,15 @@ namespace Dawn {
         // this->death->vnCharacter.setOpacity(0);
 
         auto sourceItem = this->createSceneItem();
-        auto source = sourceItem->addComponent<AudioSource>();
+        source = sourceItem->addComponent<AudioSource>();
         source->transform->setLocalPosition(glm::vec3(1, 0, 0));
+        source->eventFinished.addListener(this, &Scene_1::onFinished);
         
-        auto data = new AudioData();
+        auto audio = this->game->assetManager.get<AudioAsset>("audio_test");
-        data->init();
 
-        source->setAudioData(data);
+        source->setAudioData(audio);
-        source->play();
+        source->loop = true;
-        source->setLoop(true);
+        source->state = AUDIO_SOURCE_STATE_PLAYING;
       }
 
       void onSceneEnded() {
@@ -48,8 +53,8 @@ namespace Dawn {
         auto start = new VisualNovelPauseEvent(vnManager, 1.0f);
 
         start
-          ->then(new VisualNovelTextboxEvent(vnManager, nullptr, "scene.1.1"))
+          // ->then(new VisualNovelTextboxEvent(vnManager, nullptr, "scene.1.1"))
-          ->then(new VisualNovelCallbackEvent<Scene_1>(vnManager, this, &Scene_1::onSceneEnded))
+          // ->then(new VisualNovelCallbackEvent<Scene_1>(vnManager, this, &Scene_1::onSceneEnded))
         ;
 
         return start;
@@ -64,6 +69,7 @@ namespace Dawn {
         auto man = &this->game->assetManager;
         std::vector<Asset*> assets = PixelVNScene::getRequiredAssets();
         vectorAppend(&assets, DeathPrefab::getRequiredAssets(man));
+        assets.push_back(man->get<AudioAsset>("audio_test"));
         return assets;
       }
   };

src/dawntools/CMakeLists.txt

@@ -3,6 +3,7 @@
 # This software is released under the MIT License.
 # https://opensource.org/licenses/MIT
 
+add_subdirectory(audio)
 add_subdirectory(display)
 add_subdirectory(file)
 add_subdirectory(locale)

src/dawntools/audio/CMakeLists.txt

@@ -0,0 +1,15 @@
+# Copyright (c) 2021 Dominic Msters
+# 
+# This software is released under the MIT License.
+# https://opensource.org/licenses/MIT
+
+add_subdirectory(audiogen)
+
+# Texture Tool
+function(tool_audio target in)
+  add_custom_target(${target}
+    COMMAND audiogen "${DAWN_ASSETS_SOURCE_DIR}/${in}" "${DAWN_ASSETS_BUILD_DIR}/${target}"
+    COMMENT "Generating audio ${target} from ${in}"
+    DEPENDS audiogen
+  )
+endfunction()

src/dawntools/audio/audiogen/CMakeLists.txt

@@ -0,0 +1,23 @@
+# Copyright (c) 2021 Dominic Msters
+# 
+# This software is released under the MIT License.
+# https://opensource.org/licenses/MIT
+
+# Texture Build Tool
+project(audiogen VERSION 1.0)
+add_executable(audiogen)
+target_sources(audiogen
+  PRIVATE
+    main.cpp
+    ../../utils/file.c
+)
+target_include_directories(audiogen
+  PUBLIC
+    ${CMAKE_CURRENT_LIST_DIR}/../../
+    ${CMAKE_CURRENT_LIST_DIR}
+)
+target_link_libraries(audiogen
+  PUBLIC
+    ${DAWN_BUILD_HOST_LIBS}
+    AudioFile
+)

src/dawntools/audio/audiogen/main.cpp

@@ -0,0 +1,78 @@
+// Copyright (c) 2023 Dominic Masters
+// 
+// This software is released under the MIT License.
+// https://opensource.org/licenses/MIT
+
+extern "C" {
+  #include "../../utils/common.h"
+  #include "../../utils/file.h"
+}
+#include "AudioFile.h"
+
+int main(int argc, char *argv[]) {
+  FILE *fileOut;
+  char buffer[FILENAME_MAX];
+  size_t bufferLength = 0;
+
+  if(argc != 3) {
+    printf("Invalid number of arguments\n");
+    return 1;
+  }
+
+  fileNormalizeSlashes(argv[1]);
+  fileNormalizeSlashes(argv[2]);
+  std::string strFileIn = std::string(argv[1]);
+  std::string strFileOut = std::string(argv[2]);
+  
+  buffer[0] = '\0';
+  sprintf(buffer, "%s.audio", strFileOut.c_str());
+  fileOut = fopen(buffer, "rb");
+  if(fileOut != NULL) {
+    fclose(fileOut);
+    return 0;
+  }
+
+  // Load input file
+  AudioFile<double_t> audioFile;
+  if(!audioFile.load(strFileIn)) {
+    printf("Failed to load audio file.\n");
+    return 1;
+  }
+
+  // Open Output File
+  fileMkdirp(buffer);
+  fileOut = fopen(buffer, "wb");
+  if(fileOut == NULL) {
+    printf("Failed to create output file\n");
+    return 1;
+  }
+
+  // Write header
+  buffer[0] = '\0';
+  sprintf(buffer, "%i|%i|%i|%i|",
+    audioFile.getNumChannels(),
+    audioFile.getSampleRate(),
+    audioFile.getNumSamplesPerChannel(),
+    audioFile.getNumSamplesPerChannel() * audioFile.getNumChannels()*(
+      sizeof(int16_t) / sizeof(uint8_t)
+    )
+  );
+  bufferLength = strlen(buffer);
+  fwrite(buffer, sizeof(char), bufferLength,  fileOut);
+
+  // Convert Data to 16 bit audio
+  for (int i = 0; i < audioFile.getNumSamplesPerChannel(); i++) {
+    for(int y = 0; y < audioFile.getNumChannels(); y++) {
+      double_t sample = audioFile.samples[y][i];
+      sample = sample < -1 ? -1 : sample > 1 ? 1 : sample;
+      auto q = static_cast<int16_t> (sample * 32767.);
+      
+      buffer[0] = (q >> 8) & 0xFF;
+      buffer[1] = q & 0xFF;
+      fwrite(buffer, sizeof(uint8_t), 2, fileOut);
+    }
+  }
+
+  fclose(fileOut);
+  return 0;
+}