CRI SEI patch provided by Andrivon Pierre <Pierre.Andrivon@…>
Changes:
General code cleaning-up and improvement
Alignment of code with latest spec (JCTVC-R1013_v3)
Tested successfully for macro SVC_EXTENSION=1 and SVC_EXTENSION=0
At the encoder, parameters of the SEI are input through a file.
At the decoder, when present, CRI SEI is applied with the runtime parameter --SEIColourRemappingInfo (same as --SEIDecodedPictureHash)