void init_audio(void)
{
al_reserve_samples(num_samples); // Sets up the default mixer
// Set up the audio stream and mixer attachment
if (stream)
{
if (al_get_mixer_attached(al_get_default_mixer()))
{
al_detach_mixer(al_get_default_mixer());
}
al_destroy_audio_stream(stream);
}
stream = al_create_audio_stream(
num_fragments,
size_fragment,
audio_rate,
AUDIO_DEPTH,
CHANNEL_CONF);
al_attach_audio_stream_to_mixer(stream, al_get_default_mixer());
al_register_event_source(event_queue,
al_get_audio_stream_event_source(stream));
}
inline void SoundManager::DestroyMixer()
{
if(mixer!=NULL)
{
al_detach_mixer(mixer);
al_destroy_mixer(mixer);
}
}
void AudioWrappers::finalize_audio(void)
{
if (!AudioWrappers::is_enabled()) return;
if (mixer != NULL)
{
al_detach_mixer(mixer);
al_destroy_mixer(mixer);
}
if (voice != NULL)
al_destroy_voice(voice);
}
void Framework::ShutdownAudioSystem()
{
#ifdef WRITE_LOG
printf( "Framework: Shutdown Audio\n" );
#endif
if( mixer != 0 )
{
al_detach_mixer( mixer );
al_destroy_mixer( mixer );
mixer = 0;
}
if( voice != 0 )
{
al_destroy_voice( voice );
voice = 0;
}
}
/* Creates the default voice and mixer if they haven't been created yet. */
static bool create_default_mixer(void)
{
int voice_frequency = 44100;
int voice_depth = ALLEGRO_AUDIO_DEPTH_INT16;
int mixer_frequency = 44100;
int mixer_depth = ALLEGRO_AUDIO_DEPTH_FLOAT32;
ALLEGRO_CONFIG *config = al_get_system_config();
const char *p;
p = al_get_config_value(config, "audio", "primary_voice_frequency");
if (p && p[0] != '\0') {
voice_frequency = atoi(p);
}
p = al_get_config_value(config, "audio", "primary_mixer_frequency");
if (p && p[0] != '\0') {
mixer_frequency = atoi(p);
}
p = al_get_config_value(config, "audio", "primary_voice_depth");
if (p && p[0] != '\0') {
voice_depth = string_to_depth(p);
}
p = al_get_config_value(config, "audio", "primary_mixer_depth");
if (p && p[0] != '\0') {
mixer_depth = string_to_depth(p);
}
if (!allegro_voice) {
allegro_voice = al_create_voice(voice_frequency, voice_depth,
ALLEGRO_CHANNEL_CONF_2);
if (!allegro_voice) {
ALLEGRO_ERROR("al_create_voice failed\n");
goto Error;
}
}
if (!allegro_mixer) {
allegro_mixer = al_create_mixer(mixer_frequency, mixer_depth,
ALLEGRO_CHANNEL_CONF_2);
if (!allegro_mixer) {
ALLEGRO_ERROR("al_create_voice failed\n");
goto Error;
}
}
/* In case this function is called multiple times. */
al_detach_mixer(allegro_mixer);
if (!al_attach_mixer_to_voice(allegro_mixer, allegro_voice)) {
ALLEGRO_ERROR("al_attach_mixer_to_voice failed\n");
goto Error;
}
return true;
Error:
if (allegro_mixer) {
al_destroy_mixer(allegro_mixer);
allegro_mixer = NULL;
}
if (allegro_voice) {
al_destroy_voice(allegro_voice);
allegro_voice = NULL;
}
return false;
}