opensipstack-devel

[OpenSIPStack] How can I add a mediaformat to a soundchannel ?

[Claudio M. <cmi...@gm...>]

Hi,

I was working with sound channels and had a problem: How can I add a media
format to it ?
And How can I recognise the sound devices that are present in the computer ?

I have tried the following solutions. But it did not work. Any guess ?

Thanks in advance.


Claudio Miceli de Farias

PSoundChannel * MMedia::CreateSoundChannel(const OpalMediaFormat &
mediaFormat,
                                                     BOOL isSource)
        {
          PString deviceName;
          PSoundChannel * soundChannel = new PSoundChannel();

          if (isSource)
            deviceName = soundChannel->GetDefaultDevice(
PSoundChannel::Recorder );
          else
            deviceName = soundChannel->GetDefaultDevice(
PSoundChannel::Player );

          if (isSource) cout << "\n record device: " << deviceName << "\n";

          if (soundChannel->Open(deviceName,
                                 isSource ? PSoundChannel::Recorder
                                          : PSoundChannel::Player,
                                 1, mediaFormat.GetClockRate(), 16)) {
            PTRACE(1, "PCSS\tOpened sound channel \"" << deviceName
                   << "\" for " << (isSource ? "record" : "play") <<
"ing."); //nao estah entrando aqui
            return soundChannel;
          }
          return soundChannel;
        }



OpalMediaStream * MMedia::CreateMediaStream(const OpalMediaFormat &
mediaFormat,
                                                                unsigned
sessionID,BOOL isSource)
        {
         PSoundChannel * soundChannel = CreateSoundChannel(mediaFormat,
isSource);
          if (soundChannel == NULL)
            return NULL;

          return new OpalAudioMediaStream(mediaFormat, sessionID, isSource,
soundChannelBuffers, soundChannel);
        }

OpalAudioFormat::OpalAudioFormat (OPAL_G711_ULAW_64K,
RTP_DataFrame::PCMU,           "PCMU",  8, 8,  240, 30, 256);
mediaFormats+= OpalMediaFormat::OpalMediaFormat(OPAL_G711_ULAW_64K);

Re: [OpenSIPStack] How can I add a mediaformat to a soundchannel ?

[Joegen E. B. <joe...@gm...>]

Claudio Miceli wrote:
> Hi,
>
> I was working with sound channels and had a problem: How can I add a media
> format to it ?
>   


I am not sure I understand your question but here is my best effort 
guess.  Right now OPAL assumes that the sound card can only handle PCM16. 

     OpalMediaFormatList pcm;
      pcm += OpalPCM16;
     CreateSoundChannel( format );

> And How can I recognise the sound devices that are present in the computer ?
>   


Depends on what you mean by "recognise".  But if you mean how to get the 
sound devices present, then take a look at PSoundChannel::GetDeviceNames()


> I have tried the following solutions. But it did not work. Any guess ?
>
> Thanks in advance.
>
>
> Claudio Miceli de Farias
>
> PSoundChannel * MMedia::CreateSoundChannel(const OpalMediaFormat &
> mediaFormat,
>                                                      BOOL isSource)
>         {
>           PString deviceName;
>           PSoundChannel * soundChannel = new PSoundChannel();
>
>           if (isSource)
>             deviceName = soundChannel->GetDefaultDevice(
> PSoundChannel::Recorder );
>           else
>             deviceName = soundChannel->GetDefaultDevice(
> PSoundChannel::Player );
>
>           if (isSource) cout << "\n record device: " << deviceName << "\n";
>
>           if (soundChannel->Open(deviceName,
>                                  isSource ? PSoundChannel::Recorder
>                                           : PSoundChannel::Player,
>                                  1, mediaFormat.GetClockRate(), 16)) {
>             PTRACE(1, "PCSS\tOpened sound channel \"" << deviceName
>                    << "\" for " << (isSource ? "record" : "play") <<
> "ing."); //nao estah entrando aqui
>             return soundChannel;
>           }
>           return soundChannel;
>         }
>
>
>
> OpalMediaStream * MMedia::CreateMediaStream(const OpalMediaFormat &
> mediaFormat,
>                                                                 unsigned
> sessionID,BOOL isSource)
>         {
>          PSoundChannel * soundChannel = CreateSoundChannel(mediaFormat,
> isSource);
>           if (soundChannel == NULL)
>             return NULL;
>
>           return new OpalAudioMediaStream(mediaFormat, sessionID, isSource,
> soundChannelBuffers, soundChannel);
>         }
>
> OpalAudioFormat::OpalAudioFormat (OPAL_G711_ULAW_64K,
> RTP_DataFrame::PCMU,           "PCMU",  8, 8,  240, 30, 256);
> mediaFormats+= OpalMediaFormat::OpalMediaFormat(OPAL_G711_ULAW_64K);
> -------------------------------------------------------------------------
> This SF.net email is sponsored by the 2008 JavaOne(SM) Conference 
> Don't miss this year's exciting event. There's still time to save $100. 
> Use priority code J8TL2D2. 
> http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone
> _______________________________________________
> opensipstack-devel mailing list
> ope...@li...
> https://lists.sourceforge.net/lists/listinfo/opensipstack-devel
>
>
>