/*
======================
S_UpdateBackgroundTrack
======================
*/
void S_UpdateBackgroundTrack( void ) {
int bufferSamples;
int fileSamples;
byte raw[30000]; // just enough to fit in a mac stack frame
int fileBytes;
int r;
if(!s_backgroundStream) {
return;
}
// don't bother playing anything if musicvolume is 0
if ( s_musicVolume->value <= 0 ) {
return;
}
// see how many samples should be copied into the raw buffer
if ( s_rawend[0] < s_soundtime ) {
s_rawend[0] = s_soundtime;
}
while ( s_rawend[0] < s_soundtime + MAX_RAW_SAMPLES ) {
bufferSamples = MAX_RAW_SAMPLES - (s_rawend[0] - s_soundtime);
// decide how much data needs to be read from the file
fileSamples = bufferSamples * s_backgroundStream->info.rate / dma.speed;
if (!fileSamples)
return;
// our max buffer size
fileBytes = fileSamples * (s_backgroundStream->info.width * s_backgroundStream->info.channels);
if ( fileBytes > sizeof(raw) ) {
fileBytes = sizeof(raw);
fileSamples = fileBytes / (s_backgroundStream->info.width * s_backgroundStream->info.channels);
}
// Read
r = S_CodecReadStream(s_backgroundStream, fileBytes, raw);
if(r < fileBytes)
{
fileBytes = r;
fileSamples = r / (s_backgroundStream->info.width * s_backgroundStream->info.channels);
}
if(r > 0)
{
// add to raw buffer
S_Base_RawSamples(0, fileSamples, s_backgroundStream->info.rate,
s_backgroundStream->info.width, s_backgroundStream->info.channels, raw, s_musicVolume->value, -1);
}
else
{
// loop
if(s_backgroundLoop[0])
{
S_CodecCloseStream(s_backgroundStream);
s_backgroundStream = NULL;
S_Base_StartBackgroundTrack( s_backgroundLoop, s_backgroundLoop );
if(!s_backgroundStream)
return;
}
else
{
S_Base_StopBackgroundTrack();
return;
}
}
}
}
void
sndupdatebackgroundtrack(void)
{
int bufferSamples;
int fileSamples;
byte raw[30000]; /* just enough to fit in a mac stack frame */
int fileBytes;
int r;
if(!s_backgroundStream)
return;
if(s_musicVolume->value <= 0)
return;
/* see how many samples should be copied into the raw buffer */
if(s_rawend[0] < s_soundtime)
s_rawend[0] = s_soundtime;
while(s_rawend[0] < s_soundtime + MAX_RAW_SAMPLES) {
bufferSamples = MAX_RAW_SAMPLES - (s_rawend[0] - s_soundtime);
/* decide how much data needs to be read from the file */
fileSamples = bufferSamples * s_backgroundStream->info.rate /
dma.speed;
if(!fileSamples)
return;
/* our max buffer size */
fileBytes = fileSamples *
(s_backgroundStream->info.width *
s_backgroundStream->info.channels);
if(fileBytes > sizeof(raw)) {
fileBytes = sizeof(raw);
fileSamples = fileBytes /
(s_backgroundStream->info.width *
s_backgroundStream->info.channels);
}
r = S_CodecReadStream(s_backgroundStream, fileBytes, raw);
if(r < fileBytes) {
fileBytes = r;
fileSamples = r / (s_backgroundStream->info.width *
s_backgroundStream->info.channels);
}
if(r > 0)
/* add to raw buffer */
S_Base_RawSamples(0, fileSamples,
s_backgroundStream->info.rate,
s_backgroundStream->info.width,
s_backgroundStream->info.channels, raw,
s_musicVolume->value,
-1);
else {
/* loop */
if(s_backgroundLoop[0]) {
S_CodecCloseStream(s_backgroundStream);
s_backgroundStream = NULL;
S_Base_StartBackgroundTrack(s_backgroundLoop,
s_backgroundLoop);
if(!s_backgroundStream)
return;
} else {
S_Base_StopBackgroundTrack();
return;
}
}
}
}