/*
* Stream music.
*/
void
OGG_Stream(void)
{
if (!ogg_started)
{
return;
}
if (ogg_status == PLAY)
{
#ifdef USE_OPENAL
if (sound_started == SS_OAL)
{
/* Calculate the number of buffers used
for storing decoded OGG/Vorbis data.
We take the number of active buffers
at startup (at this point most of the
samples should be precached and loaded
into buffers) and add 64. Empircal
testing showed, that at most times
at least 52 buffers remain available
for OGG/Vorbis, enough for about 3
seconds playback. The music won't
stutter as long as the framerate
stayes over 1 FPS. */
if (ogg_numbufs == 0)
{
ogg_numbufs = active_buffers + 64;
}
/* active_buffers are all active OpenAL buffers,
buffering normal sfx _and_ ogg/vorbis samples. */
while (active_buffers <= ogg_numbufs)
{
OGG_Read();
}
}
else /* using SDL */
#endif
{
if (sound_started == SS_SDL)
{
/* Read that number samples into the buffer, that
were played since the last call to this function.
This keeps the buffer at all times at an "optimal"
fill level. */
while (paintedtime + MAX_RAW_SAMPLES - 2048 > s_rawend)
{
OGG_Read();
}
}
} /* using SDL */
} /* ogg_status == PLAY */
}