ffat_get_channel_id  127 libavcodec/audiotoolboxdec.c     return ffat_get_channel_id(da->mChannelLabel) - ffat_get_channel_id(db->mChannelLabel);
ffat_get_channel_id  195 libavcodec/audiotoolboxdec.c             int id = ffat_get_channel_id(layout->mChannelDescriptions[i].mChannelLabel);