Audio API first pass

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

@@ -0,0 +1,90 @@
+// 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);
+}