Function ffmpeg_dev::sys::av_get_channel_layout_channel_index

pub unsafe extern "C" fn av_get_channel_layout_channel_index(
    channel_layout: u64, 
    channel: u64
) -> c_int

Get the index of a channel in channel_layout.

@param channel a channel layout describing exactly one channel which must be present in channel_layout.

@return index of channel in channel_layout on success, a negative AVERROR on error.