search for: ff_opus_parse_extradata

...but if people have problems with it, we can instead keep the existing table and add a simple bitmask before or after it. I've looked into the relevant changes in libavcodec and libopus. It's reasonably simple to add on the decode side in libavcodec's native decoder (largely changes to ff_opus_parse_extradata), but it's a bit trickier in libopus, because there's no support in the API for channel layouts (and thus stereo stream counts) other than those in the standard. I'd expect to need to take one of these routes: Add new opus_multistream_surround_encoder_create and opus_multistream_surroun...