minecraft-pi-reborn/media-layer/core/src/audio/engine.c

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2021-09-12 03:18:12 +00:00
#include <AL/al.h>
#include <AL/alc.h>
#include <AL/alext.h>
#include <libreborn/libreborn.h>
#include "engine.h"
#include "file.h"
// Store Device
static ALCdevice *device = NULL;
static ALCcontext *context = NULL;
// Store State
static int is_loaded = 0;
int _media_audio_is_loaded() {
return is_loaded;
}
// Init
void _media_audio_init() {
// Open Device
device = alcOpenDevice(NULL);
if (!device) {
WARN("%s", "Unable To Load Audio Engine");
return;
}
// Create Context
context = alcCreateContext(device, NULL);
ALCenum err = alcGetError(device);
if (err != ALC_NO_ERROR) {
ERR("Unable To Open Audio Context: %s", alcGetString(device, err));
}
// Select Context
alcMakeContextCurrent(context);
err = alcGetError(device);
if (err != ALC_NO_ERROR) {
ERR("Unable To Select Audio Context: %s", alcGetString(device, err));
}
// Enable AL_SOURCE_DISTANCE_MODEL
alEnable(AL_SOURCE_DISTANCE_MODEL);
ALenum al_err = alGetError();
if (al_err != AL_NO_ERROR) {
ERR("Unable To Enable AL_SOURCE_DISTANCE_MODEL: %s", alGetString(al_err));
}
// Log
INFO("%s", "Loaded Audio Engine");
is_loaded = 1;
}
// De-Init
void _media_audio_cleanup() {
if (_media_audio_is_loaded()) {
// Delete Audio Buffers
_media_audio_delete_buffers();
// Deselect Context
alcMakeContextCurrent(NULL);
ALCenum err = alcGetError(device);
if (err != ALC_NO_ERROR) {
ERR("Unable To Deselect Audio Context: %s", alcGetString(device, err));
}
// Destroy Context
alcDestroyContext(context);
err = alcGetError(device);
if (err != ALC_NO_ERROR) {
ERR("Unable To Destroy Audio Context: %s", alcGetString(device, err));
}
// Close Device
alcCloseDevice(device);
err = alcGetError(device);
if (err != ALC_NO_ERROR) {
ERR("Unable To Close Audio Device: %s", alcGetString(device, err));
}
// Log
INFO("%s", "Unloaded Audio Engine");
}
}