void press_sound_chunk()
{
int siz;
siz=find_sound_action();
mix_buffer(siz);
compress_buffer_stereo(siz);
write(tf,&target,siz);
}
static void Mac_UnlockAudio(_THIS)
{
SInt32 oldval;
oldval = DecrementAtomic((SInt32 *) &audio_is_locked);
if ( oldval != 1 ) /* != 1 means audio is still locked. */
return;
/* Did we miss the chance to mix in an interrupt? Do it now. */
if ( BitAndAtomic (0xFFFFFFFF, (UInt32 *) &need_to_mix) ) {
/*
* Note that this could be a problem if you missed an interrupt
* while the audio was locked, and get preempted by a second
* interrupt here, but that means you locked for way too long anyhow.
*/
mix_buffer (this, buffer[fill_me]);
}
}
static void
callBackProc(SndChannel * chan, SndCommand * cmd_passed)
{
UInt32 play_me;
SndCommand cmd;
SDL_AudioDevice *audio = (SDL_AudioDevice *) chan->userInfo;
IncrementAtomic((SInt32 *) & need_to_mix);
fill_me = cmd_passed->param2; /* buffer that has just finished playing, so fill it */
play_me = !fill_me; /* filled buffer to play _now_ */
if (!audio->enabled) {
return;
}
/* queue previously mixed buffer for playback. */
header.samplePtr = (Ptr) buffer[play_me];
cmd.cmd = bufferCmd;
cmd.param1 = 0;
cmd.param2 = (long) &header;
SndDoCommand(chan, &cmd, 0);
SDL_memset(buffer[fill_me], 0, audio->spec.size);
/*
* if audio device isn't locked, mix the next buffer to be queued in
* the memory block that just finished playing.
*/
if (!BitAndAtomic(0xFFFFFFFF, (UInt32 *) & audio_is_locked)) {
mix_buffer(audio, buffer[fill_me]);
}
/* set this callback to run again when current buffer drains. */
if (running) {
cmd.cmd = callBackCmd;
cmd.param1 = 0;
cmd.param2 = play_me;
SndDoCommand(chan, &cmd, 0);
}
}
