Audio API first pass

src/dawnopenal/scene/CMakeLists.txt

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+# Copyright (c) 2022 Dominic Masters
+# 
+# This software is released under the MIT License.
+# https://opensource.org/licenses/MIT
+
+# Subdirs
+add_subdirectory(components)

src/dawnopenal/scene/components/CMakeLists.txt

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+# Copyright (c) 2022 Dominic Masters
+# 
+# This software is released under the MIT License.
+# https://opensource.org/licenses/MIT
+
+# Subdirs
+add_subdirectory(audio)

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

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+// Copyright (c) 2023 Dominic Masters
+// 
+// This software is released under the MIT License.
+// https://opensource.org/licenses/MIT
+
+#include "AudioListener.hpp"
+
+using namespace Dawn;
+
+AudioListener::AudioListener(SceneItem *i) : SceneItemComponent(i) {
+
+}
+
+void AudioListener::onStart() {
+  alListener3f(AL_VELOCITY, 0, 0, 0);
+
+  ALfloat listenerOri[] = { 0.0, 0.0, -1.0, 0.0, 1.0, 0.0 };
+  alListenerfv(AL_ORIENTATION, listenerOri);
+
+  glm::vec3 position = this->transform->getLocalPosition();
+  alListener3f(AL_POSITION, position.x, position.y, position.z);
+
+  this->transform->eventTransformUpdated.addListener(this, &AudioListener::onTransformUpdate);
+}
+
+void AudioListener::onDispose() {
+  this->transform->eventTransformUpdated.removeListener(this, &AudioListener::onTransformUpdate);
+}
+
+void AudioListener::onTransformUpdate() {
+  glm::vec3 position = this->transform->getWorldPosition();
+  alListener3f(AL_POSITION, position.x, position.y, position.z);
+}

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

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+// Copyright (c) 2023 Dominic Masters
+// 
+// This software is released under the MIT License.
+// https://opensource.org/licenses/MIT
+
+#pragma once
+#include "dawnopenal.hpp"
+#include "scene/SceneItemComponent.hpp"
+
+namespace Dawn {
+  class AudioListener : public SceneItemComponent {
+    private:
+      void onTransformUpdate();
+
+    public:
+      AudioListener(SceneItem *item);
+
+      void onStart() override;
+      void onDispose() override;
+  };
+}

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

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+// Copyright (c) 2023 Dominic Masters
+// 
+// This software is released under the MIT License.
+// https://opensource.org/licenses/MIT
+
+#include "AudioSource.hpp"
+#include "scene/SceneItem.hpp"
+
+using namespace Dawn;
+
+AudioSource::AudioSource(SceneItem *i) : SceneItemComponent(i) {
+
+}
+
+void AudioSource::onStart() {
+  alGenSources((ALuint)1, &this->source);
+
+  // In future these will probably be tied to the layer
+  alSourcef(this->source, AL_PITCH, 1);
+  // alSourcef(this->source, AL_GAIN, AL_MAX_GAIN);
+
+  glm::vec3 position = this->transform->getLocalPosition();
+  alSource3f(this->source, AL_POSITION, position.x, position.y, position.z);
+
+    // alSourcei(this->source, AL_SOURCE_RELATIVE, AL_TRUE);
+    // alSourcef(this->source, AL_REFERENCE_DISTANCE, 0);
+    // alSourcef(this->source, AL_ROLLOFF_FACTOR, 0);
+
+  // 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);
+  }
+
+  // Playing
+  if(this->playing) alSourcePlay(this->source);
+
+  // Listen for events
+  this->transform->eventTransformUpdated.addListener(this, &AudioSource::onTransformUpdate);
+
+  this->ready = true;
+}
+
+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);
+}
+
+bool_t AudioSource::isPlaying() {
+  return this->playing;
+}
+
+void AudioSource::play() {
+  this->playing = true;
+  if(this->ready && data != nullptr && data->ready) {
+    alSourcePlay(this->source);
+  }
+}
+
+AudioData * AudioSource::getAudioData() {
+  return this->data;
+}
+
+void AudioSource::setAudioData(AudioData *data) {
+  this->data = data;
+  if(this->ready && data != nullptr && data->ready) {
+    alSourcei(source, AL_BUFFER, data->buffer);
+  }
+}
+
+void AudioSource::onDispose() {
+  this->transform->eventTransformUpdated.removeListener(this, &AudioSource::onTransformUpdate);
+
+  this->ready = false;
+  alDeleteSources((ALuint)1, &this->source);
+}
+
+void AudioSource::onTransformUpdate() {
+  glm::vec3 position = this->transform->getWorldPosition();
+  alSource3f(this->source, AL_POSITION, position.x, position.y, position.z);
+}

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

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+// Copyright (c) 2023 Dominic Masters
+// 
+// This software is released under the MIT License.
+// https://opensource.org/licenses/MIT
+
+#pragma once
+#include "dawnopenal.hpp"
+#include "scene/SceneItemComponent.hpp"
+#include "audio/AudioData.hpp"
+
+namespace Dawn {
+  class AudioSource : public SceneItemComponent {
+    private:
+      ALuint source;
+      bool_t ready = false;
+
+      // Settings
+      bool_t loop = false;
+      bool_t playing = false;
+      int32_t layer = 0;
+      AudioData *data = nullptr;
+
+      void onTransformUpdate();
+
+    public:
+      /**
+       * Creates an Audio Source item component.
+       * 
+       * @param item SceneItem that this audio source is attached to.
+       */
+      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);
+
+      bool_t isPlaying();
+      void play();
+
+      /**
+       * Returns the current audio data for this source.
+       * 
+       * @return Audio data that is atached to this source.
+       */
+      AudioData * getAudioData();
+
+      /**
+       * Sets the audio data for this source. Currently switching between the
+       * audio data during playback may have undefined behavior.
+       * 
+       * @param data Data to set.
+       */
+      void setAudioData(AudioData *data);
+
+      void onStart() override;
+      void onDispose() override;
+  };
+}

src/dawnopenal/scene/components/audio/CMakeLists.txt

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+# Copyright (c) 2022 Dominic Masters
+# 
+# This software is released under the MIT License.
+# https://opensource.org/licenses/MIT
+
+# Sources
+target_sources(${DAWN_TARGET_NAME}
+  PRIVATE
+    AudioListener.cpp
+    AudioSource.cpp
+)