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
See Implementation
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