/** * marshal a single SEI message sei, storing the marshalled representation * in bitstream bs. */ void writeSEImessage(TComBitIf& bs, const SEI& sei) { /* calculate how large the payload data is */ /* TODO: this would be far nicer if it used vectored buffers */ TComBitCounter bs_count; bs_count.resetBits(); writeSEIpayloadData(bs_count, sei); unsigned payload_data_num_bits = bs_count.getNumberOfWrittenBits(); assert(0 == payload_data_num_bits % 8); unsigned payloadType = sei.payloadType(); for (; payloadType >= 0xff; payloadType -= 0xff) { bs.write(0xff, 8); } bs.write(payloadType, 8); unsigned payloadSize = payload_data_num_bits/8; for (; payloadSize >= 0xff; payloadSize -= 0xff) { bs.write(0xff, 8); } bs.write(payloadSize, 8); /* payloadData */ writeSEIpayloadData(bs, sei); }
/** * marshal a picture_digest SEI message, storing the marshalled * representation in bitstream bs. */ static void writeSEIpictureDigest(TComBitIf& bs, const SEIpictureDigest& sei) { bs.write(sei.method, 8); for (unsigned i = 0; i < 16; i++) { bs.write(sei.digest[i], 8); } }
/** * marshal a user_data_unregistered SEI message sei, storing the marshalled * representation in bitstream bs. */ static void writeSEIuserDataUnregistered(TComBitIf& bs, const SEIuserDataUnregistered &sei) { for (unsigned i = 0; i < 16; i++) { bs.write(sei.uuid_iso_iec_11578[i], 8); } for (unsigned i = 0; i < sei.userDataLength; i++) { bs.write(sei.userData[i], 8); } }
/** * marshal a picture_digest SEI message, storing the marshalled * representation in bitstream bs. */ static void writeSEIpictureDigest(TComBitIf& bs, const SEIpictureDigest& sei) { int numChar=0; bs.write(sei.method, 8); if(sei.method == SEIpictureDigest::MD5) { numChar = 16; } else if(sei.method == SEIpictureDigest::CRC) { numChar = 2; } else if(sei.method == SEIpictureDigest::CHECKSUM) { numChar = 4; } for(int yuvIdx = 0; yuvIdx < 3; yuvIdx++) { for (unsigned i = 0; i < numChar; i++) { bs.write(sei.digest[yuvIdx][i], 8); } } }