static int audio_data_handler(unsigned char major, unsigned char minor, unsigned char *data, int len, void *context)
{
#ifdef AUDIO
static const int selected_chan=1;
int chan;
int nsamp;
if (mve_audio_canplay)
{
if (mve_audio_playing)
SDL_LockAudio();
chan = get_ushort(data + 2);
nsamp = get_ushort(data + 4);
if (chan & selected_chan)
{
/* HACK: +4 mveaudio_uncompress adds 4 more bytes */
if (major == MVE_OPCODE_AUDIOFRAMEDATA) {
if (mve_audio_compressed) {
nsamp += 4;
mve_audio_buflens[mve_audio_buftail] = nsamp;
mve_audio_buffers[mve_audio_buftail] = (short *)mve_alloc(nsamp);
mveaudio_uncompress(mve_audio_buffers[mve_audio_buftail], data, -1); /* XXX */
} else {
nsamp -= 8;
data += 8;
mve_audio_buflens[mve_audio_buftail] = nsamp;
mve_audio_buffers[mve_audio_buftail] = (short *)mve_alloc(nsamp);
memcpy(mve_audio_buffers[mve_audio_buftail], data, nsamp);
}
} else {
mve_audio_buflens[mve_audio_buftail] = nsamp;
mve_audio_buffers[mve_audio_buftail] = (short *)mve_alloc(nsamp);
memset(mve_audio_buffers[mve_audio_buftail], 0, nsamp); /* XXX */
}
if (++mve_audio_buftail == TOTAL_AUDIO_BUFFERS)
mve_audio_buftail = 0;
#ifndef WIN32
if (mve_audio_buftail == mve_audio_bufhead)
fprintf(stderr, "d'oh! buffer ring overrun (%d)\n", mve_audio_bufhead);
#endif
}
if (mve_audio_playing)
SDL_UnlockAudio();
}
#endif
return 1;
}
static int audio_data_handler(unsigned char major, unsigned char minor, unsigned char *data, int len, void *context)
{
#ifdef USE_SDLMIXER
// MD2211: for audio conversion
SDL_AudioCVT cvt;
int clen;
int out_freq;
Uint16 out_format;
int out_channels;
// end MD2211
#endif
static const int selected_chan=1;
int chan;
int nsamp;
if (mve_audio_canplay)
{
if (mve_audio_playing)
SDL_LockAudio();
chan = get_ushort(data + 2);
nsamp = get_ushort(data + 4);
if (chan & selected_chan)
{
/* HACK: +4 mveaudio_uncompress adds 4 more bytes */
if (major == MVE_OPCODE_AUDIOFRAMEDATA) {
if (mve_audio_compressed) {
nsamp += 4;
mve_audio_buflens[mve_audio_buftail] = nsamp;
mve_audio_buffers[mve_audio_buftail] = (short *)mve_alloc(nsamp);
mveaudio_uncompress(mve_audio_buffers[mve_audio_buftail], data, -1); /* XXX */
} else {
nsamp -= 8;
data += 8;
mve_audio_buflens[mve_audio_buftail] = nsamp;
mve_audio_buffers[mve_audio_buftail] = (short *)mve_alloc(nsamp);
memcpy(mve_audio_buffers[mve_audio_buftail], data, nsamp);
}
} else {
mve_audio_buflens[mve_audio_buftail] = nsamp;
mve_audio_buffers[mve_audio_buftail] = (short *)mve_alloc(nsamp);
memset(mve_audio_buffers[mve_audio_buftail], 0, nsamp); /* XXX */
}
// MD2211: the following block does on-the-fly audio conversion for SDL_mixer
#ifdef USE_SDLMIXER
if (!GameArg.SndDisableSdlMixer) {
// build converter: in = MVE format, out = SDL_mixer output
Mix_QuerySpec(&out_freq, &out_format, &out_channels); // get current output settings
SDL_BuildAudioCVT(&cvt, mve_audio_spec->format, mve_audio_spec->channels, mve_audio_spec->freq,
out_format, out_channels, out_freq);
clen = nsamp * cvt.len_mult;
cvt.buf = malloc(clen);
cvt.len = nsamp;
// read the audio buffer into the conversion buffer
memcpy(cvt.buf, mve_audio_buffers[mve_audio_buftail], nsamp);
// do the conversion
if (SDL_ConvertAudio(&cvt)) con_printf(CON_DEBUG,"audio conversion failed!\n");
// copy back to the audio buffer
mve_free(mve_audio_buffers[mve_audio_buftail]); // free the old audio buffer
mve_audio_buflens[mve_audio_buftail] = clen;
mve_audio_buffers[mve_audio_buftail] = (short *)mve_alloc(clen);
memcpy(mve_audio_buffers[mve_audio_buftail], cvt.buf, clen);
}
#endif
if (++mve_audio_buftail == TOTAL_AUDIO_BUFFERS)
mve_audio_buftail = 0;
if (mve_audio_buftail == mve_audio_bufhead)
con_printf(CON_CRITICAL, "d'oh! buffer ring overrun (%d)\n", mve_audio_bufhead);
}
if (mve_audio_playing)
SDL_UnlockAudio();
}
return 1;
}
