Reconstruct data at end of avcC from SPS

[OllieJones]

https://stackoverflow.com/questions/66736186/analyze-peculiar-avcc-atom-structure

The extra data at the end of avcC is this. These fields turn up in SPS.

if( profile_idc == 100 || profile_idc == 110 ||
    profile_idc == 122 || profile_idc == 144 )
{
   bit(6) reserved = ‘111111’b;
   unsigned int(2) chroma_format;
   bit(5) reserved = ‘11111’b;
   unsigned int(3) bit_depth_luma_minus8;
   bit(5) reserved = ‘11111’b;
   unsigned int(3) bit_depth_chroma_minus8;
   unsigned int(8) numOfSequenceParameterSetExt;
   for (i=0; i< numOfSequenceParameterSetExt; i++) {
      unsigned int(16) sequenceParameterSetExtLength;
      bit(8*sequenceParameterSetExtLength) sequenceParameterSetExtNALUnit;
   }
}