HRESULT TaudioCodecLibDTS::decode(TbyteBuffer &src)
{
unsigned char *p = src.size() ? &src[0] : NULL;
unsigned char *base = p;
unsigned char *end = p + src.size();
while (end - p >= 14) {
int size = 0, flags, sample_rate, frame_length, bit_rate;
if ((size = dca_syncinfo(state, p, &flags, &sample_rate, &bit_rate, &frame_length)) > 0) {
bool enoughData = p + size <= end;
if (enoughData) {
if (codecId == CODEC_ID_SPDIF_DTS) {
bpssum += (lastbps = bit_rate / 1000);
numframes++;
BYTE type;
switch (frame_length) {
case 512:
type = 0x0b;
break;
case 1024:
type = 0x0c;
break;
default :
type = 0x0d;
break;
}
HRESULT hr = deciA->deliverSampleBistream(p, size, bit_rate, sample_rate, true, frame_length, 0);
if (hr != S_OK) {
return hr;
}
} else {
flags |= DCA_ADJUST_LEVEL;
libdca::sample_t level = 1, bias = 0;
if (dca_frame(state, p, &flags, &level, bias) == 0) {
bpssum += (lastbps = bit_rate / 1000);
numframes++;
// Dynamic range compression - Not suppored yet by libdts
if (deci->getParam2(IDFF_audio_decoder_DRC)) {
libdca::sample_t drcLevel = ((libdca::sample_t)deci->getParam2(IDFF_audio_decoder_DRC_Level) / 100);
if (drcLevel <= 0.5) {
dca_dynrng(state, NULL, NULL);
}
} else {
dca_dynrng(state, NULL, NULL);
}
int scmapidx = std::min(flags & DCA_CHANNEL_MASK, int(countof(scmaps) / 2));
const Tscmap &scmap = scmaps[scmapidx + ((flags & DCA_LFE) ? (countof(scmaps) / 2) : 0)];
int blocks = dca_blocks_num(state);
float *dst0, *dst;
dst0 = dst = (float*)getDst(blocks * 256 * scmap.nchannels * sizeof(float));
int i = 0;
for (; i < blocks && dca_block(state) == 0; i++) {
libdca::sample_t* samples = dca_samples(state);
for (int j = 0; j < 256; j++, samples++)
for (int ch = 0; ch < scmap.nchannels; ch++) {
*dst++ = float(*(samples + 256 * scmap.ch[ch]) / level);
}
}
if (i == blocks) {
fmt.sf = TsampleFormat::SF_FLOAT32;
fmt.freq = sample_rate;
fmt.setChannels(scmap.nchannels, scmap.channelMask);
HRESULT hr = sinkA->deliverDecodedSample(dst0, blocks * 256, fmt);
if (hr != S_OK) {
return hr;
}
}
}
}
p += size;
}
memmove(base, p, end - p);
end = base + (end - p);
p = base;
if (!enoughData) {
break;
}
} else {
p++;
}
}
src.resize(end - p);
return S_OK;
}
HRESULT TaudioCodecLiba52::decode(TbyteBuffer &src)
{
unsigned char *p=src.size() ? &src[0] : NULL;
unsigned char *base=p;
unsigned char *end=p+src.size();
while (end-p>7) {
int size=0,flags,sample_rate,bit_rate;
if ((size=a52_syncinfo(p,&flags,&sample_rate,&bit_rate))>0) {
bool enoughData=p+size<=end;
if (enoughData) {
if (codecId==CODEC_ID_SPDIF_AC3) {
bpssum+=(lastbps=bit_rate/1000);
numframes++;
HRESULT hr=deciA->deliverSampleSPDIF(p,size,bit_rate,sample_rate,true);
if (hr!=S_OK) {
return hr;
}
} else {
flags|=A52_ADJUST_LEVEL;
liba52::sample_t level=1,bias=0;
if (a52_frame(state,p,&flags,&level,bias)==0) {
bpssum+=(lastbps=bit_rate/1000);
numframes++;
// Dynamic range compression
if (deci->getParam2(IDFF_audio_decoder_DRC)) {
liba52::sample_t drcLevel = ((liba52::sample_t)deci->getParam2(IDFF_audio_decoder_DRC_Level) / 100);
a52_dynrngsetlevel(state, drcLevel);
} else {
a52_dynrngsetlevel(state, 0.0);
}
int scmapidx=std::min(flags&A52_CHANNEL_MASK,int(countof(scmaps)/2));
const Tscmap &scmap=scmaps[scmapidx+((flags&A52_LFE)?(countof(scmaps)/2):0)];
float *dst0,*dst;
dst0=dst=(float*)getDst(6*256*scmap.nchannels*sizeof(float));
int i=0;
for(; i<6 && a52_block(state)==0; i++) {
liba52::sample_t* samples=a52_samples(state);
for (int j=0; j<256; j++,samples++)
for (int ch=0; ch<scmap.nchannels; ch++) {
*dst++=float(*(samples+256*scmap.ch[ch])/level);
}
}
if (i==6) {
fmt.sf=TsampleFormat::SF_FLOAT32;
fmt.freq=sample_rate;
fmt.setChannels(scmap.nchannels,scmap.channelMask);
HRESULT hr=sinkA->deliverDecodedSample(dst0,6*256,fmt);
if (hr!=S_OK) {
return hr;
}
}
}
}
p+=size;
}
memmove(base,p,end-p);
end=base+(end-p);
p=base;
if (!enoughData) {
break;
}
} else {
p++;
}
}
src.resize(end-p);
return S_OK;
}