Missing symbols from channel_layout?

[adigitoleo]

I can't find any AVChannelLayout type here, but I could be missing something because I have only started to look into ffmpeg since yesterday. Basically I'm trying to write a very simple terminal audio player, but I'm sort of following some of ffplay.c because I have no idea what I'm doing (it's also pretty messy though). At some point they are using av_channel_layout_copy (also missing?) for a kind of non-essential test before actually setting up the output. I can probably skip this for now but I wanted to let you know in case you missed this.