Re: [Linphone-developers] Stereo Payload Types

[Simon Morlat]

Hi,

Option 1 seems good to me !
Do you have a patch ?

Simon

Le mardi 8 mai 2007 17:27, Nicholas J Humfrey a écrit :
> Hi,
>
> I am looking at using oRTP for strereo payload types (specifically
> static payload number 10). I have been looking at the oRTP API and
> working out how best to implement it.
>
> Option 1: Add a 'int channels;' to the PayloadType structure. But
> this might cause problems with binary compatibility?
>
> Option 2: Use one of the private oRTP flags (eg PAYLOAD_TYPE_PRIV1)
> to indicate that the payload is stereo.
>
>
> Ideally I would like to be able to do:
>
> pt = rtp_profile_find_payload_number(&avprofile, "L16", 44100, 2);
>
> and
>
> pt = rtp_profile_get_payload_number_from_rtpmap(&avprofile,
> "L16/44100/2");
>
>
> Would be nice to get payloads 10 and 11 added to oRTP's default list
> of static payload types...
>
> nick.
>
>
>
>
> static char null_bytes[] = {0x00, 0x00, 0x00, 0x00};
>
> PayloadType payload_type_l16_mono=
> {
>       PAYLOAD_AUDIO_CONTINUOUS, // type
>       44100,          // clock rate
>       16,                     // bits per frame
>       null_bytes,     // zero pattern
>       2,                      // pattern_length
>       705600,         // normal_bitrate (44100 x 16bits per frame x 1 channel)
>       "L16",          // MIME Type
>       1,                      // Channels
> };
>
>
> PayloadType payload_type_l16_stereo=
> {
>       PAYLOAD_AUDIO_CONTINUOUS, // type
>       44100,          // clock rate
>       32,                     // bits per frame
>       null_bytes,     // zero pattern
>       4,                      // pattern_length
>       1411200,        // normal_bitrate (44100 x 16bits per frame x 2 
> channels)
>       "L16",          // MIME Type
>       2,                      // Channels
> };
>
>
>
>
>
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