3da63eeaa7
Add the following NAL unit parsing utility functions that will be needed for the MV-HEVC support as proposed in Apple's HEVC stereo video interoperability profile: - NAL unit header parsing to get the layer information needed for MV-HEVC support. - VPS parsing, including vps_extension() needed for MV-HEVC support. - SPS parsing modifications to support MV-HEVC. PiperOrigin-RevId: 647329211