diff options
Diffstat (limited to 'plugins')
| -rw-r--r-- | plugins/dfsound/alsa.c | 35 |
1 files changed, 32 insertions, 3 deletions
diff --git a/plugins/dfsound/alsa.c b/plugins/dfsound/alsa.c index 2a291f6a..e1fe46f6 100644 --- a/plugins/dfsound/alsa.c +++ b/plugins/dfsound/alsa.c @@ -248,14 +248,43 @@ void SoundFeedStreamData(unsigned char* pSound,long lBytes) iDisStereo ? lBytes / 2 : lBytes / 4); } +static unsigned char cdda_buf[23520]; + // PLAY CDDA CHANNEL void CALLBACK SPUplayCDDAchannel(short* pcm, int nbytes) { + int i, size, s; + unsigned char *p = (unsigned char *)pcm; + if (handle_cdda == NULL) return; - if (snd_pcm_state(handle_cdda) == SND_PCM_STATE_XRUN) - snd_pcm_prepare(handle_cdda); - snd_pcm_writei(handle_cdda, (unsigned char *)pcm, nbytes / 4); + while (nbytes > 0) + { + size = nbytes; + if (size > sizeof(cdda_buf)) size = sizeof(cdda_buf); + + for (i = 0; i < size / 4; i++) + { + s = p[i*2] | (p[i*2+1] << 8); + s *= iLeftXAVol; + s /= 32767; + cdda_buf[i*2] = (s & 0xFF); + cdda_buf[i*2+1] = ((s & 0xFF00) >> 8); + + s = p[i*2+2] | (p[i*2+3] << 8); + s *= iRightXAVol; + s /= 32767; + cdda_buf[i*2+2] = (s & 0xFF); + cdda_buf[i*2+3] = ((s & 0xFF00) >> 8); + } + + if (snd_pcm_state(handle_cdda) == SND_PCM_STATE_XRUN) + snd_pcm_prepare(handle_cdda); + snd_pcm_writei(handle_cdda, cdda_buf, size / 4); + + nbytes -= size; + p += size; + } } #endif |