Function rsmpeg::ffi::av_get_channel_layout_string

pub unsafe extern "C" fn av_get_channel_layout_string(
    buf: *mut i8, 
    buf_size: i32, 
    nb_channels: i32, 
    channel_layout: u64
)

Return a description of a channel layout. If nb_channels is <= 0, it is guessed from the channel_layout.

@param buf put here the string containing the channel layout @param buf_size size in bytes of the buffer