X264VideoDescription::X264VideoDescription(unsigned char* pNaluArray,unsigned len) throw() : _init_ok(false)
{
_extradata_offset = _extradata_len = 0;
_extradata_ok = false;
//没有异常抛出，不要给空指针
memset(&_profile,0,sizeof(_profile));
memset(&_basic_desc,0,sizeof(_basic_desc));
if (*(unsigned short*)pNaluArray == 0)
{
_parser = std::make_unique<H264AnnexBParser>();
_init_ok = _parser->InitFromStartCode(pNaluArray,len);
if (_init_ok)
_init_ok = ParseSPS();
if (_init_ok)
{
_extradata = std::unique_ptr<unsigned char>(new unsigned char[len / 4 * 4 + 8]);
_extradata_offset = 0;
_extradata_len = len;
_extradata_ok = false;
}
}
}
HRESULT CH264SequenceParser::ParseNALs(const BYTE *buffer, size_t buflen, int nal_size)
{
CH264Nalu nalu;
nalu.SetBuffer(buffer, buflen, nal_size);
while (nalu.ReadNext()) {
const BYTE *data = nalu.GetDataBuffer() + 1;
const size_t len = nalu.GetDataLength() - 1;
if (nalu.GetType() == NALU_TYPE_SPS) {
ParseSPS(data, len);
break;
}
}
return S_OK;
}
HRESULT CHEVCSequenceParser::ParseNALs(const BYTE *buffer, size_t buflen, int nal_size)
{
CH265Nalu nalu;
nalu.SetBuffer(buffer, buflen, nal_size);
while (nalu.ReadNext()) {
const BYTE *data = nalu.GetDataBuffer() + 2;
const size_t len = nalu.GetDataLength() - 2;
if (nalu.GetType() == HEVC_NAL_SPS) {
CH264NALUnescape unescapedNAL(data, len);
ParseSPS(unescapedNAL.GetBuffer(), unescapedNAL.GetSize());
break;
}
}
return S_OK;
}
