105 lines
2.9 KiB
C++
105 lines
2.9 KiB
C++
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#include <vector>
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#include <cmath>
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#include <AL/al.h>
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#include <media-layer/audio.h>
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#include <libreborn/libreborn.h>
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#include "file.h"
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#include "engine.h"
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// Store Audio Sources
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static std::vector<ALuint> &get_sources() {
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static std::vector<ALuint> sources;
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return sources;
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}
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#define AL_ERROR_CHECK() \
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{ \
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ALenum err = alGetError(); \
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if (err != AL_NO_ERROR) { \
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ERR("OpenAL Error: %s", alGetString(err)); \
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} \
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}
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// Update Listener
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void media_audio_update(float volume, float x, float y, float z, float yaw) {
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// Update Listener Volume
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alListenerf(AL_GAIN, volume);
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AL_ERROR_CHECK();
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// Update Listener Position
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alListener3f(AL_POSITION, x, y, z);
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AL_ERROR_CHECK();
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// Update Listener Orientation
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float radian_yaw = yaw * (M_PI / 180);
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ALfloat orientation[] = {-sinf(radian_yaw), 0.0f, cosf(radian_yaw), 0.0f, 1.0f, 0.0f};
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alListenerfv(AL_ORIENTATION, orientation);
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AL_ERROR_CHECK();
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// Clear Finished Sources
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std::vector<ALuint>::iterator it = get_sources().begin();
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while (it != get_sources().end()) {
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ALuint source = *it;
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// Check
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ALint source_state;
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alGetSourcei(source, AL_SOURCE_STATE, &source_state);
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AL_ERROR_CHECK();
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if (source_state != AL_PLAYING) {
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// Finished
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it = get_sources().erase(it);
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alDeleteSources(1, &source);
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AL_ERROR_CHECK();
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} else {
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// Still Playing
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++it;
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}
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}
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}
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void media_audio_play(const char *source, const char *name, float x, float y, float z, float pitch, float volume, int is_ui) {
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// Load Sound
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ALuint buffer = _media_audio_get_buffer(source, name);
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if (buffer) {
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// Create Source
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ALuint al_source;
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alGenSources(1, &al_source);
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AL_ERROR_CHECK();
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// Set Properties
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alSourcef(al_source, AL_PITCH, pitch);
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AL_ERROR_CHECK();
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alSourcef(al_source, AL_GAIN, volume);
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AL_ERROR_CHECK();
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alSource3f(al_source, AL_POSITION, x, y, z);
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AL_ERROR_CHECK();
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alSource3f(al_source, AL_VELOCITY, 0, 0, 0);
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AL_ERROR_CHECK();
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alSourcei(al_source, AL_LOOPING, AL_FALSE);
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AL_ERROR_CHECK();
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alSourcei(al_source, AL_SOURCE_RELATIVE, is_ui ? AL_TRUE : AL_FALSE);
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AL_ERROR_CHECK();
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// Set Attenuation
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alSourcei(al_source, AL_DISTANCE_MODEL, AL_LINEAR_DISTANCE);
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AL_ERROR_CHECK();
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alSourcef(al_source, AL_MAX_DISTANCE, 16.0f);
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AL_ERROR_CHECK();
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alSourcef(al_source, AL_ROLLOFF_FACTOR, 1.0f);
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AL_ERROR_CHECK();
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alSourcef(al_source, AL_REFERENCE_DISTANCE, 0.0f);
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AL_ERROR_CHECK();
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// Set Buffer
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alSourcei(al_source, AL_BUFFER, buffer);
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AL_ERROR_CHECK();
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// Play
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alSourcePlay(al_source);
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AL_ERROR_CHECK();
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get_sources().push_back(al_source);
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}
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}
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