static void mve_audio_callback(void *userdata, unsigned char *stream, int len)
{
int total=0;
int length;
if (mve_audio_bufhead == mve_audio_buftail)
return /* 0 */;
//con_printf(CON_CRITICAL, "+ <%d (%d), %d, %d>\n", mve_audio_bufhead, mve_audio_curbuf_curpos, mve_audio_buftail, len);
while (mve_audio_bufhead != mve_audio_buftail /* while we have more buffers */
&& len > (mve_audio_buflens[mve_audio_bufhead]-mve_audio_curbuf_curpos)) /* and while we need more data */
{
length = mve_audio_buflens[mve_audio_bufhead]-mve_audio_curbuf_curpos;
memcpy(stream, /* cur output position */
((unsigned char *)mve_audio_buffers[mve_audio_bufhead])+mve_audio_curbuf_curpos, /* cur input position */
length); /* cur input length */
total += length;
stream += length; /* advance output */
len -= length; /* decrement avail ospace */
mve_free(mve_audio_buffers[mve_audio_bufhead]); /* free the buffer */
mve_audio_buffers[mve_audio_bufhead]=NULL; /* free the buffer */
mve_audio_buflens[mve_audio_bufhead]=0; /* free the buffer */
if (++mve_audio_bufhead == TOTAL_AUDIO_BUFFERS) /* next buffer */
mve_audio_bufhead = 0;
mve_audio_curbuf_curpos = 0;
}
//con_printf(CON_CRITICAL, "= <%d (%d), %d, %d>: %d\n", mve_audio_bufhead, mve_audio_curbuf_curpos, mve_audio_buftail, len, total);
/* return total; */
if (len != 0 /* ospace remaining */
&& mve_audio_bufhead != mve_audio_buftail) /* buffers remaining */
{
memcpy(stream, /* dest */
((unsigned char *)mve_audio_buffers[mve_audio_bufhead]) + mve_audio_curbuf_curpos, /* src */
len); /* length */
mve_audio_curbuf_curpos += len; /* advance input */
stream += len; /* advance output (unnecessary) */
len -= len; /* advance output (unnecessary) */
if (mve_audio_curbuf_curpos >= mve_audio_buflens[mve_audio_bufhead]) /* if this ends the current chunk */
{
mve_free(mve_audio_buffers[mve_audio_bufhead]); /* free buffer */
mve_audio_buffers[mve_audio_bufhead]=NULL;
mve_audio_buflens[mve_audio_bufhead]=0;
if (++mve_audio_bufhead == TOTAL_AUDIO_BUFFERS) /* next buffer */
mve_audio_bufhead = 0;
mve_audio_curbuf_curpos = 0;
}
}
//con_printf(CON_CRITICAL, "- <%d (%d), %d, %d>\n", mve_audio_bufhead, mve_audio_curbuf_curpos, mve_audio_buftail, len);
}
void MVE_rmEndMovie()
{
int i;
timer_stop();
timer_created = 0;
if (mve_audio_canplay) {
// MD2211: if using SDL_Mixer, we never reinit sound, hence never close it
#ifdef USE_SDLMIXER
if (GameArg.SndDisableSdlMixer)
#endif
{
SDL_CloseAudio();
}
mve_audio_canplay = 0;
}
for (i = 0; i < TOTAL_AUDIO_BUFFERS; i++)
if (mve_audio_buffers[i] != NULL)
mve_free(mve_audio_buffers[i]);
memset(mve_audio_buffers, 0, sizeof(mve_audio_buffers));
memset(mve_audio_buflens, 0, sizeof(mve_audio_buflens));
mve_audio_curbuf_curpos=0;
mve_audio_bufhead=0;
mve_audio_buftail=0;
mve_audio_playing=0;
mve_audio_canplay=0;
mve_audio_compressed=0;
if (mve_audio_spec)
mve_free(mve_audio_spec);
mve_audio_spec=NULL;
audiobuf_created = 0;
mve_free(g_vBuffers);
g_vBuffers = NULL;
g_pCurMap=NULL;
g_nMapLength=0;
videobuf_created = 0;
video_initialized = 0;
mve_close(mve);
mve = NULL;
}
void MVE_rmEndMovie()
{
#ifdef AUDIO
int i;
#endif
timer_stop();
timer_created = 0;
#ifdef AUDIO
if (mve_audio_canplay) {
// only close audio if we opened it
SDL_CloseAudio();
mve_audio_canplay = 0;
}
for (i = 0; i < TOTAL_AUDIO_BUFFERS; i++)
if (mve_audio_buffers[i] != NULL)
mve_free(mve_audio_buffers[i]);
memset(mve_audio_buffers, 0, sizeof(mve_audio_buffers));
memset(mve_audio_buflens, 0, sizeof(mve_audio_buflens));
mve_audio_curbuf_curpos=0;
mve_audio_bufhead=0;
mve_audio_buftail=0;
mve_audio_playing=0;
mve_audio_canplay=0;
mve_audio_compressed=0;
if (mve_audio_spec)
mve_free(mve_audio_spec);
mve_audio_spec=NULL;
audiobuf_created = 0;
#endif
mve_free(g_vBuffers);
g_vBuffers = NULL;
g_pCurMap=NULL;
g_nMapLength=0;
videobuf_created = 0;
video_initialized = 0;
mve_close(mve);
mve = NULL;
}
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;
}
