[opus] multi stream decode

[Jean-Marc Valin]

Hi Audric,

First thing I'd like to point out is that the current RTP draft does not
support transmitting more than one stream. Unless the two streams are
truly unrelated, I recommend sending as a stereo stream using the
standard (non multi-stream) API. Otherwise, you will not be compatible
with any other application, in which case, I strongly recommend *not*
using "opus" as the SDP codec name.

On 12/18/2012 10:21 AM, Audric Ackermann wrote:
> I think I'm right when I create an OpusMsDecoder with
> 
> opus_multistream_decoder_create (48000, 2, 2 ,0 ,mapping, NULL)
> 
> where mapping is:  unsigned char mapping[2] = {0,1} isn't it ?
> 
> Next, i need to encode data which I get from jack (float) so I use
> opus_multistream_encode_float(enc, data, 480 , encodedData, MAX_DATA)

Looks correct.

> My question is how can I make the opposite in the client.
> I created my decoder with
> m_decoder = opus_multistream_decoder_create (48000, 2, 2
> ,0,mapping,NULL) and
> unsigned char mapping[2] = {0,1};
> 
> Currently, I can read my RTP packet from network, and get data from it.
> I need now to decode opus data to something readable for jack. I do it
> like that :
> opus_multistream_decode_float(m_decoder, data, len, decodedBuffer,
> BUFLEN, 0);

Also looks correct.

> But how can I know the start of the two packets ?

I don't understand your question.

	Jean-Marc