int attribute_align_arg mpg123_init(void)
{
if((sizeof(short) != 2) || (sizeof(long) < 4)) return MPG123_BAD_TYPES;
if(initialized) return MPG123_OK; /* no need to initialize twice */
#ifndef NO_LAYER12
init_layer12(); /* inits also shared tables with layer1 */
#endif
#ifndef NO_LAYER3
init_layer3();
#endif
prepare_decode_tables();
check_decoders();
initialized = 1;
#if (defined REAL_IS_FLOAT) && (defined IEEE_FLOAT)
/* This is rather pointless but it eases my mind to check that we did
not enable the special rounding on a VAX or something. */
if(12346 != REAL_TO_SHORT_ACCURATE(12345.67f))
{
error("Bad IEEE 754 rounding. Re-build libmpg123 properly.");
return MPG123_ERR;
}
#endif
return MPG123_OK;
}
void init_tables(mpadec_t mpadec, MYFLT scale, int32_t sblimit)
{
register struct mpadec_t *mpa = (struct mpadec_t *)mpadec;
if (mpa->state < MPADEC_STATE_START) {
init_layer2(mpa);
init_layer3(mpa);
}
init_limits(mpa, sblimit);
make_synth_window(mpa, scale);
}
BOOL MPGLIB_Init(PMPSTR mp)
{
static int init = 0;
MPGLIB_Reset(mp);
if(!init) {
make_decode_tables(32767);
init_layer2();
init_layer3(SBLIMIT);
init = 1;
}
return !0;
}
int attribute_align_arg mpg123_init(void)
{
if((sizeof(short) != 2) || (sizeof(long) < 4)) return MPG123_BAD_TYPES;
if(initialized) return MPG123_OK; /* no need to initialize twice */
#ifndef NO_LAYER12
init_layer12(); /* inits also shared tables with layer1 */
#endif
#ifndef NO_LAYER3
init_layer3();
#endif
prepare_decode_tables();
check_decoders();
initialized = 1;
return MPG123_OK;
}
BOOL InitMP3(struct mpstr *mp)
{
memset(mp,0,sizeof(struct mpstr));
mp->framesize = 0;
mp->fsizeold = -1;
mp->bsize = 0;
mp->head = mp->tail = NULL;
mp->fr.single = -1;
mp->bsnum = 0;
mp->synth_bo = 1;
make_decode_tables(32767);
init_layer3(SBLIMIT);
return !0;
}
int InitMP3(struct mpstr *mp)
{
memset(mp,0,sizeof(struct mpstr));
initStaticData(&mp->psd);
mp->framesize = 0;
mp->fsizeold = -1;
mp->bsize = 0;
mp->head = mp->tail = NULL;
mp->fr.single = -1;
mp->bsnum = 0;
mp->synth_bo = 1;
make_decode_tables(&mp->psd, 32767);
init_layer3(&mp->psd, SBLIMIT);
mp->fr.II_sblimit=SBLIMIT;
init_layer2(&mp->psd);
return !0;
}
/*
* The poll function. Checks if more data is needed, and decodes/plays if
* needed.
*/
int _apeg_audio_poll(APEG_LAYER *layer)
{
#ifndef DISABLE_MPEG_AUDIO
struct reader *rd = &(layer->audio.rd);
struct frame *fr = &(layer->audio.fr);
struct mpstr *mp = &(layer->audio.mp);
int ret = APEG_OK;
#endif
if(layer->multiple <= 0.0f)
return APEG_OK;
if(layer->stream.flags & APEG_VORBIS_AUDIO)
return alvorbis_update(layer);
#ifdef DISABLE_MPEG_AUDIO
return APEG_ERROR;
#else
// Check if we actually need more data yet
while(!rd->eof && layer->audio.pcm.point < layer->audio.bufsize)
{
// Make sure we're not still in the process of decoding the previous
// frame
if(mp->return_later)
{
decode_frame(layer, fr, mp);
continue;
}
ret = read_frame(layer, fr);
if(ret != ALMPA_OK)
{
// Stream ended, but check if there's still audio in the buffer
if(!layer->audio.pcm.point)
return ret;
ret = APEG_OK;
break;
}
/* TODO: for fast forwarding */
/* if(stream->frame > layer->audio.frame)
{
if(fr->lay == 3)
set_pointer(mp, fr->sideInfoSize, 512);
goto do_again;
}*/
// Check for header change. This works, but it will introduce a jump
// if the frequency/channel count changes.
if(!layer->audio.inited)
{
int old_rate = layer->stream.audio.freq;
int old_channels = layer->stream.audio.channels;
int newrate = freqs[fr->sampling_frequency] >>
layer->stream.audio.down_sample;
layer->stream.audio.channels = (layer->stream.audio.down_channel?1:
fr->stereo);
layer->stream.audio.freq = newrate;
layer->stream.audio.layer = fr->lay;
layer->stream.audio.kbps = tabsel_123[fr->lsf][fr->lay-1][fr->bitrate_index];
fr->down_sample_sblimit = SBLIMIT>>layer->stream.audio.down_sample;
if(layer->stream.audio.freq != old_rate ||
layer->stream.audio.channels != old_channels)
{
if(fr->lay == 3)
init_layer3(layer->stream.audio.down_sample);
if(_apeg_audio_reset_parameters(layer) != APEG_OK)
return APEG_ERROR;
}
layer->audio.inited = TRUE;
}
++(layer->audio.frame);
decode_frame(layer, fr, mp);
}