int32_t MV_KillAllVoices(void)
{
if (!MV_Installed)
return MV_Error;
DisableInterrupts();
if (&VoiceList == VoiceList.next)
{
RestoreInterrupts();
return MV_Ok;
}
VoiceNode * voice = VoiceList.prev;
// Remove all the voices from the list
while (voice != &VoiceList)
{
if (voice->priority == MV_MUSIC_PRIORITY)
{
voice = voice->prev;
continue;
}
MV_Kill(voice->handle);
voice = VoiceList.prev;
}
RestoreInterrupts();
return MV_Ok;
}
int FX_StopSound
(
int handle
)
{
int status;
status = MV_Kill( handle );
if ( status != MV_Ok )
{
FX_SetErrorCode( FX_MultiVocError );
return( FX_Warning );
}
return( FX_Ok );
}
VoiceNode *MV_AllocVoice(int32_t priority)
{
VoiceNode *voice, *node;
DisableInterrupts();
// Check if we have any free voices
if (LL_Empty(&VoicePool, next, prev))
{
// check if we have a higher priority than a voice that is playing.
for (voice = node = VoiceList.next; node != &VoiceList; node = node->next)
{
if (node->priority < voice->priority)
voice = node;
}
if (priority >= voice->priority && voice != &VoiceList && voice->handle >= MV_MINVOICEHANDLE)
MV_Kill(voice->handle);
if (LL_Empty(&VoicePool, next, prev))
{
// No free voices
RestoreInterrupts();
return NULL;
}
}
voice = VoicePool.next;
LL_Remove(voice, next, prev);
RestoreInterrupts();
int32_t vhan = MV_MINVOICEHANDLE;
// Find a free voice handle
do
{
if (++vhan < MV_MINVOICEHANDLE || vhan > MV_MaxVoices)
vhan = MV_MINVOICEHANDLE;
} while (MV_VoicePlaying(vhan));
voice->handle = vhan;
return voice;
}