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VIDEO: Add Tremor support to MKV decoder

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This commit is contained in:
Le Philousophe 2023-03-12 13:53:34 +01:00 committed by Eugene Sandulenko
parent 21b4a8f9ec
commit b45c386fc1
1 changed files with 18 additions and 0 deletions
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18
video/mkv_decoder.cpp
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@ -447,8 +447,18 @@ Audio::AudioStream *MKVDecoder::VorbisAudioTrack::getAudioStream() const {
return _audStream;
}
#ifndef USE_TREMOR
static double rint(double v) {
return floor(v + 0.5);
}
#endif
bool MKVDecoder::VorbisAudioTrack::decodeSamples(byte *frame, long size) {
#ifdef USE_TREMOR
ogg_int32_t **pcm;
#else
float **pcm;
#endif
int32 numSamples = vorbis_synthesis_pcmout(&_vorbisDSP, &pcm);
@ -461,10 +471,18 @@ bool MKVDecoder::VorbisAudioTrack::decodeSamples(byte *frame, long size) {
error("MKVDecoder::readNextPacket(): buffer allocation failed");
for (int32 i = 0; i < channels; i++) { /* It's faster in this order */
#ifdef USE_TREMOR
ogg_int32_t *src = pcm[i];
#else
float *src = pcm[i];
#endif
short *dest = ((short *)buffer) + i;
for (int32 j = 0; j < numSamples; j++) {
#ifdef USE_TREMOR
int val = (int)(src[j] >> 9);
#else
int val = rint(src[j] * 32768.f);
#endif
val = CLIP(val, -32768, 32767);
*dest = (short)val;
dest += channels;