/**
* @brief Cleans up after the sound subsytem.
*/
void sound_al_exit (void)
{
int i;
soundLock();
/* Free groups. */
for (i=0; i<al_ngroups; i++) {
if (al_groups[i].sources != NULL) {
free(al_groups[i].sources);
}
al_groups[i].sources = NULL;
al_groups[i].nsources = 0;
}
if (al_groups != NULL)
free(al_groups);
al_groups = NULL;
al_ngroups = 0;
/* Free stacks. */
if (source_all != NULL) {
alSourceStopv( source_nall, source_all );
alDeleteSources( source_nall, source_all );
free(source_all);
}
source_all = NULL;
source_nall = 0;
if (source_total)
free(source_total);
source_total = NULL;
source_ntotal = 0;
if (source_stack != NULL)
free(source_stack);
source_stack = NULL;
source_nstack = 0;
source_mstack = 0;
/* Clean up EFX stuff. */
if (al_info.efx == AL_TRUE) {
nalDeleteAuxiliaryEffectSlots( 1, &efx_directSlot );
if (al_info.efx_reverb == AL_TRUE)
nalDeleteEffects( 1, &efx_reverb );
if (al_info.efx_echo == AL_TRUE)
nalDeleteEffects( 1, &efx_echo );
}
/* Clean up global stuff. */
if (al_context) {
alcMakeContextCurrent(NULL);
alcDestroyContext( al_context );
}
if (al_device)
alcCloseDevice( al_device );
soundUnlock();
SDL_DestroyMutex( sound_lock );
}
/**
* @brief Enables the OpenAL EFX extension.
*
* @return 0 on success.
*/
static int al_enableEFX (void)
{
/* Get general information. */
alcGetIntegerv( al_device, ALC_MAX_AUXILIARY_SENDS, 1, &al_info.efx_auxSends );
alcGetIntegerv( al_device, ALC_EFX_MAJOR_VERSION, 1, &al_info.efx_major );
alcGetIntegerv( al_device, ALC_EFX_MINOR_VERSION, 1, &al_info.efx_minor );
/* Get function pointers. */
nalGenAuxiliaryEffectSlots = alGetProcAddress( "alGenAuxiliaryEffectSlots" );
nalDeleteAuxiliaryEffectSlots = alGetProcAddress( "alDeleteAuxiliaryEffectSlots" );
nalIsAuxiliaryEffectSlot = alGetProcAddress( "alIsAuxiliaryEffectSlot" );
nalAuxiliaryEffectSloti = alGetProcAddress( "alAuxiliaryEffectSloti" );
nalAuxiliaryEffectSlotiv = alGetProcAddress( "alAuxiliaryEffectSlotiv" );
nalAuxiliaryEffectSlotf = alGetProcAddress( "alAuxiliaryEffectSlotf" );
nalAuxiliaryEffectSlotfv = alGetProcAddress( "alAuxiliaryEffectSlotfv" );
nalGetAuxiliaryEffectSloti = alGetProcAddress( "alGetAuxiliaryEffectSloti" );
nalGetAuxiliaryEffectSlotiv = alGetProcAddress( "alGetAuxiliaryEffectSlotiv" );
nalGetAuxiliaryEffectSlotf = alGetProcAddress( "alGetAuxiliaryEffectSlotf" );
nalGetAuxiliaryEffectSlotfv = alGetProcAddress( "alGetAuxiliaryEffectSlotfv" );
nalGenFilters = alGetProcAddress( "alGenFilters" );
nalDeleteFilters = alGetProcAddress( "alDeleteFilters" );
nalFilteri = alGetProcAddress( "alFilteri" );
nalFilteriv = alGetProcAddress( "alFilteriv" );
nalFilterf = alGetProcAddress( "alFilterf" );
nalFilterfv = alGetProcAddress( "alFilterfv" );
nalGenEffects = alGetProcAddress( "alGenEffects" );
nalDeleteEffects = alGetProcAddress( "alDeleteEffects" );
nalEffecti = alGetProcAddress( "alEffecti" );
nalEffectiv = alGetProcAddress( "alEffectiv" );
nalEffectf = alGetProcAddress( "alEffectf" );
nalEffectfv = alGetProcAddress( "alEffectfv" );
if (!nalGenAuxiliaryEffectSlots || !nalDeleteAuxiliaryEffectSlots ||
!nalIsAuxiliaryEffectSlot ||
!nalAuxiliaryEffectSloti || !nalAuxiliaryEffectSlotiv ||
!nalAuxiliaryEffectSlotf || !nalAuxiliaryEffectSlotfv ||
!nalGetAuxiliaryEffectSloti || !nalGetAuxiliaryEffectSlotiv ||
!nalGetAuxiliaryEffectSlotf || !nalGetAuxiliaryEffectSlotfv ||
!nalGenFilters || !nalDeleteFilters ||
!nalFilteri || !nalFilteriv || !nalFilterf || !nalFilterfv ||
!nalGenEffects || !nalDeleteEffects ||
!nalEffecti || !nalEffectiv || !nalEffectf || !nalEffectfv) {
DEBUG("OpenAL EFX functions not found, disabling EFX.");
al_info.efx = AL_FALSE;
return -1;
}
/* Create auxiliary slot. */
nalGenAuxiliaryEffectSlots( 1, &efx_directSlot );
/* Create reverb effect. */
nalGenEffects( 1, &efx_reverb );
nalEffecti( efx_reverb, AL_EFFECT_TYPE, AL_EFFECT_REVERB );
if(alGetError() != AL_NO_ERROR) {
DEBUG("OpenAL Reverb not found, disabling.");
al_info.efx_reverb = AL_FALSE;
nalDeleteEffects( 1, &efx_reverb );
}
else {
al_info.efx_reverb = AL_TRUE;
/* Set Reverb parameters. */
/*nalEffectf( efx_reverb, AL_REVERB_DECAY_TIME, 15. );*/
}
/* Create echo effect. */
nalGenEffects( 1, &efx_echo );
nalEffecti( efx_echo, AL_EFFECT_TYPE, AL_EFFECT_ECHO );
if(alGetError() != AL_NO_ERROR) {
DEBUG("OpenAL Echo not found, disabling.");
al_info.efx_echo = AL_FALSE;
nalDeleteEffects( 1, &efx_echo );
}
else {
al_info.efx_echo = AL_TRUE;
/* Set Echo parameters. */
nalEffectf( efx_echo, AL_ECHO_DELAY, 0.207 );
}
/* Set up the listener. */
alListenerf( AL_METERS_PER_UNIT, 5. );
/* Check for errors. */
al_checkErr();
return 0;
}