void SoundQ_process()
{
if ( SoundQ_channel > -1 ) {
if ( digi_is_channel_playing(SoundQ_channel) )
return;
SoundQ_end();
}
while ( SoundQ_head != SoundQ_tail ) {
sound_q * q = &SoundQ[SoundQ_head];
if ( q->time_added+MAX_LIFE > timer_query() ) {
SoundQ_channel = digi_start_sound(q->soundnum, F1_0+1, 0xFFFF/2, 0, -1, -1, -1 );
return;
} else {
// expired; remove from Queue
SoundQ_end();
}
}
}
// Volume 0-F1_0
int digi_audio_start_sound(short soundnum, fix volume, int pan, int looping, int, int, sound_object *const soundobj)
{
int i, starting_channel;
if (!digi_initialised) return -1;
if (soundnum < 0) return -1;
SDL_LockAudio();
Assert(GameSounds[soundnum].data != reinterpret_cast<void *>(-1));
starting_channel = next_channel;
while(1)
{
if (!SoundSlots[next_channel].playing)
break;
if (!SoundSlots[next_channel].persistent)
break; // use this channel!
next_channel++;
if (next_channel >= digi_max_channels)
next_channel = 0;
if (next_channel == starting_channel)
{
SDL_UnlockAudio();
return -1;
}
}
if (SoundSlots[next_channel].playing)
{
SoundSlots[next_channel].playing = 0;
if (SoundSlots[next_channel].soundobj != sound_object_none)
{
digi_end_soundobj(*SoundSlots[next_channel].soundobj);
}
if (SoundQ_channel == next_channel)
SoundQ_end();
}
#ifndef NDEBUG
verify_sound_channel_free(next_channel);
#endif
SoundSlots[next_channel].soundno = soundnum;
SoundSlots[next_channel].samples = GameSounds[soundnum].data;
SoundSlots[next_channel].length = GameSounds[soundnum].length;
SoundSlots[next_channel].volume = fixmul(digi_volume, volume);
SoundSlots[next_channel].pan = pan;
SoundSlots[next_channel].position = 0;
SoundSlots[next_channel].looped = looping;
SoundSlots[next_channel].playing = 1;
SoundSlots[next_channel].soundobj = soundobj;
SoundSlots[next_channel].persistent = 0;
if (soundobj || looping || volume > F1_0)
SoundSlots[next_channel].persistent = 1;
i = next_channel;
next_channel++;
if (next_channel >= digi_max_channels)
next_channel = 0;
SDL_UnlockAudio();
return i;
}
// Volume 0-F1_0
int digi_start_sound(short soundnum, fix volume, int pan, int looping, int loop_start, int loop_end, int soundobj)
{
int i, starting_channel;
if (!digi_initialised) return -1;
if (soundnum < 0) return -1;
LOCK();
Assert(GameSounds[soundnum].data != (void *)-1);
starting_channel = next_channel;
while(1)
{
if (!SoundSlots[next_channel].playing)
break;
if (!SoundSlots[next_channel].persistent)
break; // use this channel!
next_channel++;
if (next_channel >= digi_max_channels)
next_channel = 0;
if (next_channel == starting_channel)
{
UNLOCK();
return -1;
}
}
if (SoundSlots[next_channel].playing)
{
SoundSlots[next_channel].playing = 0;
if (SoundSlots[next_channel].soundobj > -1)
{
digi_end_soundobj(SoundSlots[next_channel].soundobj);
}
if (SoundQ_channel == next_channel)
SoundQ_end();
}
#ifndef NDEBUG
verify_sound_channel_free(next_channel);
#endif
SoundSlots[next_channel].soundno = soundnum;
SoundSlots[next_channel].samples = GameSounds[soundnum].data;
SoundSlots[next_channel].length = GameSounds[soundnum].length;
SoundSlots[next_channel].volume = fixmul(digi_volume, volume);
SoundSlots[next_channel].pan = pan;
SoundSlots[next_channel].position = 0;
SoundSlots[next_channel].looped = looping;
SoundSlots[next_channel].playing = 1;
SoundSlots[next_channel].soundobj = soundobj;
SoundSlots[next_channel].persistent = 0;
if ((soundobj > -1) || (looping) || (volume > F1_0))
SoundSlots[next_channel].persistent = 1;
i = next_channel;
next_channel++;
if (next_channel >= digi_max_channels)
next_channel = 0;
UNLOCK();
return i;
}
