[opus] Meaning of mapping[]

[Jean-Marc Valin]

On 06/01/14 06:21 PM, Ralph Giles wrote:
> It's written from the point of view of the decoder, so it seems
> backwards if you're thinking about encoding. It may help to think of it
> as opus_multistream_surround_encouder_create() returning what you have
> to pass to the decoder to understand the stream configuration.

Not only that, but it's designed so that the same signal can be copied
to multiple channels, while making it impossible to assign two streams
to the same channel.

	Jean-Marc