func (this *TDecGop) DecompressSlice(pcBitstream *TLibCommon.TComInputBitstream, rpcPic *TLibCommon.TComPic, pTraceFile io.Writer) {
pcSlice := rpcPic.GetSlice(rpcPic.GetCurrSliceIdx())
// Table of extracted substreams.
// These must be deallocated AND their internal fifos, too.
//TComInputBitstream **ppcSubstreams = NULL;
//-- For time output for each slice
iBeforeTime := time.Now()
uiStartCUAddr := pcSlice.GetSliceSegmentCurStartCUAddr()
uiSliceStartCuAddr := pcSlice.GetSliceCurStartCUAddr()
if uiSliceStartCuAddr == uiStartCUAddr {
l := len(this.m_sliceStartCUAddress)
this.m_sliceStartCUAddress[l] = int(uiSliceStartCuAddr)
//this.m_sliceStartCUAddress.PushBack(uiSliceStartCuAddr);
}
this.m_pcSbacDecoder.Init(this.m_pcBinCABAC) //(TDecBinIf*)
this.m_pcEntropyDecoder.SetEntropyDecoder(this.m_pcSbacDecoder)
this.m_pcEntropyDecoder.SetTraceFile(pTraceFile)
var uiNumSubstreams uint
if pcSlice.GetPPS().GetEntropyCodingSyncEnabledFlag() {
uiNumSubstreams = uint(pcSlice.GetNumEntryPointOffsets() + 1)
} else {
uiNumSubstreams = uint(pcSlice.GetPPS().GetNumSubstreams())
}
// init each couple {EntropyDecoder, Substream}
puiSubstreamSizes := pcSlice.GetSubstreamSizes()
ppcSubstreams := make([]*TLibCommon.TComInputBitstream, uiNumSubstreams)
this.m_pcSbacDecoders = make([]*TDecSbac, uiNumSubstreams)
this.m_pcBinCABACs = make([]*TDecBinCabac, uiNumSubstreams)
for ui := uint(0); ui < uiNumSubstreams; ui++ {
this.m_pcSbacDecoders[ui] = NewTDecSbac()
this.m_pcBinCABACs[ui] = NewTDecBinCabac()
this.m_pcSbacDecoders[ui].Init(this.m_pcBinCABACs[ui])
if ui+1 < uiNumSubstreams {
ppcSubstreams[ui] = pcBitstream.ExtractSubstream(puiSubstreamSizes[ui])
} else {
ppcSubstreams[ui] = pcBitstream.ExtractSubstream(pcBitstream.GetNumBitsLeft())
}
}
for ui := uint(0); ui+1 < uiNumSubstreams; ui++ {
this.m_pcEntropyDecoder.SetEntropyDecoder(this.m_pcSbacDecoders[uiNumSubstreams-1-ui])
this.m_pcEntropyDecoder.SetTraceFile(pTraceFile)
this.m_pcEntropyDecoder.SetBitstream(ppcSubstreams[uiNumSubstreams-1-ui])
this.m_pcEntropyDecoder.ResetEntropy(pcSlice)
}
this.m_pcEntropyDecoder.SetEntropyDecoder(this.m_pcSbacDecoder)
this.m_pcEntropyDecoder.SetTraceFile(pTraceFile)
this.m_pcEntropyDecoder.SetBitstream(ppcSubstreams[0])
this.m_pcEntropyDecoder.ResetEntropy(pcSlice)
if uiSliceStartCuAddr == uiStartCUAddr {
l := len(this.m_LFCrossSliceBoundaryFlag)
this.m_LFCrossSliceBoundaryFlag[l] = pcSlice.GetLFCrossSliceBoundaryFlag()
//this.m_LFCrossSliceBoundaryFlag.PushBack( pcSlice.GetLFCrossSliceBoundaryFlag());
}
this.m_pcSbacDecoders[0].Load(this.m_pcSbacDecoder)
this.m_pcSliceDecoder.DecompressSlice(ppcSubstreams, rpcPic, this.m_pcSbacDecoder, this.m_pcSbacDecoders)
this.m_pcEntropyDecoder.SetBitstream(ppcSubstreams[uiNumSubstreams-1])
// deallocate all created substreams, including internal buffers.
/*for ui := uint(0); ui < uiNumSubstreams; ui++ {
ppcSubstreams[ui]->deleteFifo();
delete ppcSubstreams[ui];
}
delete[] ppcSubstreams;
delete[] m_pcSbacDecoders;
delete[] m_pcBinCABACs;
*/
this.m_pcSbacDecoders = nil
this.m_pcBinCABACs = nil
lAfterTime := time.Now()
this.m_dDecTime += lAfterTime.Sub(iBeforeTime)
}
func (this *InputNALUnit) convertPayloadToRBSP(nalUnitBuf *list.List, pcBitstream *TLibCommon.TComInputBitstream, isVclNalUnit bool) *list.List {
zeroCount := 0
it_write := list.New()
oldBuf := list.New()
pos := uint(0)
pcBitstream.ClearEmulationPreventionByteLocation()
for e := nalUnitBuf.Front(); e != nil; e, pos = e.Next(), pos+1 {
//assert(zeroCount < 2 || *it_read >= 0x03);
it_read := e.Value.(byte)
oldBuf.PushBack(it_read)
if zeroCount == 2 && it_read == 0x03 {
pcBitstream.PushEmulationPreventionByteLocation(pos)
pos++
zeroCount = 0
e = e.Next()
if e == nil {
break
} else {
it_read = e.Value.(byte)
oldBuf.PushBack(it_read)
}
}
if it_read == 0x00 {
zeroCount++
} else {
zeroCount = 0
}
it_write.PushBack(it_read)
}
//assert(zeroCount == 0);
if isVclNalUnit {
// Remove cabac_zero_word from payload if present
n := 0
e := it_write.Back()
it_read := e.Value.(byte)
for it_read == 0x00 {
it_write.Remove(e)
n++
e = it_write.Back()
if e != nil {
it_read = e.Value.(byte)
} else {
break
}
}
if n > 0 {
fmt.Printf("\nDetected %d instances of cabac_zero_word", n/2)
}
}
nalUnitBuf.Init() // = .resize(it_write - nalUnitBuf.begin());
for e := it_write.Front(); e != nil; e = e.Next() {
it_read := e.Value.(byte)
nalUnitBuf.PushBack(it_read)
}
return oldBuf
}