int UnescapeCEscapeString(const string& src, string* dest,
vector<string> *errors) {
scoped_array<char> unescaped(new char[src.size() + 1]);
int len = UnescapeCEscapeSequences(src.c_str(), unescaped.get(), errors);
GOOGLE_CHECK(dest);
dest->assign(unescaped.get(), len);
return len;
}
virtual void UpdatePPSId(AP4_DataBuffer const &buffer) override
{
//Search the Slice header NALU
const AP4_UI08 *data(buffer.GetData());
unsigned int data_size(buffer.GetDataSize());
for (; data_size;)
{
// sanity check
if (data_size < naluLengthSize)
break;
// get the next NAL unit
AP4_UI32 nalu_size;
switch (naluLengthSize) {
case 1:nalu_size = *data++; data_size--; break;
case 2:nalu_size = AP4_BytesToInt16BE(data); data += 2; data_size -= 2; break;
case 4:nalu_size = AP4_BytesToInt32BE(data); data += 4; data_size -= 4; break;
default: data_size = 0; nalu_size = 1; break;
}
if (nalu_size > data_size)
break;
// Stop further NALU processing
if (countPictureSetIds < 2)
naluLengthSize = 0;
unsigned int nal_unit_type = *data & 0x1F;
if (
//nal_unit_type == AP4_AVC_NAL_UNIT_TYPE_CODED_SLICE_OF_NON_IDR_PICTURE ||
nal_unit_type == AP4_AVC_NAL_UNIT_TYPE_CODED_SLICE_OF_IDR_PICTURE //||
//nal_unit_type == AP4_AVC_NAL_UNIT_TYPE_CODED_SLICE_DATA_PARTITION_A ||
//nal_unit_type == AP4_AVC_NAL_UNIT_TYPE_CODED_SLICE_DATA_PARTITION_B ||
//nal_unit_type == AP4_AVC_NAL_UNIT_TYPE_CODED_SLICE_DATA_PARTITION_C
) {
AP4_DataBuffer unescaped(data, data_size);
AP4_NalParser::Unescape(unescaped);
AP4_BitReader bits(unescaped.GetData(), unescaped.GetDataSize());
bits.SkipBits(8); // NAL Unit Type
AP4_AvcFrameParser::ReadGolomb(bits); // first_mb_in_slice
AP4_AvcFrameParser::ReadGolomb(bits); // slice_type
pictureId = AP4_AvcFrameParser::ReadGolomb(bits); //picture_set_id
}
// move to the next NAL unit
data += nalu_size;
data_size -= nalu_size;
}
}
string UnescapeCEscapeString(const string& src) {
scoped_array<char> unescaped(new char[src.size() + 1]);
int len = UnescapeCEscapeSequences(src.c_str(), unescaped.get(), NULL);
return string(unescaped.get(), len);
}
