Real Time Audio Mixing.

Question

Hi!
I would like to mix 2 rtp stream into one. Is there any possibility?
Thanks in advance!:D

Answer 1

Hi captfoss!
I got to create de MergedDataSource, but when I tried to create the sendStream
sendStream = RTPmanager.createSendStream(outputProcessor.getDataOutput(),0);          it throws a UnsupportedFormatException.I use the index 0, because I want to mix all the track in one stream.
The audio format used in the track is ALAW_RTP. So, in outputProcessor I convert the track into this format and I add this format to the RTPManager object.
To do convert all the track of DataSource object into ALAW_RTP format I do this:
try {
     outputProcessor = Manager.createProcessor(mergeDS);     
} catch (IOException e) {
       gestor.notifyEvent(createCallErrorEvent(ErrorConstants.IO_ERROR,"IOException. Error en la creacion del Data Source o del outputProcessor al establecer la comunicación."));
} catch (NoProcessorException e) {
     gestor.notifyEvent(createCallErrorEvent(ErrorConstants.CREATE_PROCESSOR,"NoProcessorException. Error en la creacion del outputProcessor al establecer la comunicación."));
outputProcessor.addControllerListener(this);
try
     logger.debug("["+callID+"]OutputProcessor.configure()");
     outputProcessor.configure();
}catch(Exception e){
     logger.error("["+callID+"]establecerComunicacion - outputProcessor.configure"+e.getMessage());
}when the outputProcessor is configured:
if(audioFormat!=null)
     TrackControl track[]=outputProcessor.getTrackControls();
     for (int i = 0; i < track.length; i++) {
          track.setEnabled(true);
     Format [] alawRTPFormat = alawrtpPacketizer.getSupportedOutputFormats(null);
     if(audioFormat.matches(alawRTPFormat[0]))
          Codec[] codec = new Codec[2];
          codec[0] = alawEncoder;
          codec[1] = alawrtpPacketizer;
          for (int i = 0; i < track.length; i++) {
               track[i].setFormat(audioFormat);
               logger.debug("["+callID+"]outputprocessorConfigured - Habilitada pista : "+i);
          try {
               for (int i = 0; i < track.length; i++) {
                    track[0].setCodecChain(codec);
          } catch (UnsupportedPlugInException e) {
               gestor.notifyEvent(createCallErrorEvent(ErrorConstants.UNSUPPORTED_PLUGINGS,"UnsupportedPlugInException al modificar la cadena de codecs del outputProcessor."));
          } catch (NotConfiguredError e) {
               gestor.notifyEvent(createCallErrorEvent(ErrorConstants.NOT_CONFIGURED_PROCESSOR,"NotConfiguredError al modificar la cadena de codecs del inputProcessor."));     
     else
          for (int i = 0; i < track.length; i++) {
          track[i].setEnabled(true);
try
     logger.debug("["+callID+"]outputProcessor.realize()");
     outputProcessor.realize();
} catch (Exception e) {
     logger.error("["+callID+"]outputProcessorConfigured - realize."+e.getMessage());
when the outputProcessor is realized:     outputDS = (DataSource) outputProcessor.getDataOutput();               
     initSessionManager();
and initSessionManager method is this:private void initSessionManager()
     try {
          logger.debug("["+callID+"]initSessionManager - RTPmanager.createSendStream() ");
          sendStream = RTPmanager.createSendStream(outputProcessor.getDataOutput(),0);          
     } catch (NullPointerException e) {
          e.printStackTrace();
     } catch (UnsupportedFormatException e) {
          gestor.notifyEvent(createCallErrorEvent(ErrorConstants.UNSUPPORTED_FORMAT,"UnsupportedFormatException. Error el formato no es soportado en la sesión."));
     } catch (IOException e) {
          gestor.notifyEvent(createCallErrorEvent(ErrorConstants.IO_ERROR,"IOException Error al crear el SendStream."));
     } catch (Exception e) {
          logger.error("["+callID+"]InitSessionManager - createSendStream. Exception:"+e.getMessage());
     try {
          logger.debug("["+callID+"]InitSessionManager - sendStream.start() ");
          sendStream.start();
          logger.debug("["+callID+"]outputProcessor.start()");
          outputProcessor.start();
} catch (NullPointerException e) {
          e.printStackTrace();
     }catch (IOException e) {
          gestor.notifyEvent(createCallErrorEvent(ErrorConstants.IO_ERROR,"IOException Error al comenzar a enviar el SendStream."));
     } catch (Exception e) {
          logger.error("["+callID+"]InitSessionManager - sendStream.start."+e.getMessage());
Any idea about it?
Thank you very much for your help!:D