soundcarddevice.cxx

Vovida 社区开源的 SIP 协议源码

            }

            break;

        case rtp_session_sendrecv:
             cpLog(LOG_DEBUG, "full duplex already");
            deviceMutex.unlock();
            return 0;
            break;

        default:
            if ( request.localPort != 0 )
            {
                cpLog( LOG_DEBUG, "Turning on RTP receive" );
                audioStack->setSessionState( rtp_session_recvonly );
                audioStack->setReceiver( request.localPort,
                                         request.localPort + 1,
                                         0,
                                         rtpPayloadPCMU,
                                         rtpPayloadPCMU,
                                         0 );
            }
            if ( request.remotePort != 0 )
            {
                cpLog( LOG_DEBUG, "Turning on RTP transmit" );
                if( request.localPort != 0 )
                {
                    audioStack->setSessionState( rtp_session_sendrecv );
                }
                else
                {
                    audioStack->setSessionState( rtp_session_sendonly );
                }
                audioStack->setTransmiter( request.remoteHost,
                                           request.remotePort,
                                           request.remotePort + 1,
                                           rtpPayloadPCMU,
                                           rtpPayloadPCMU );
            }
            break;
        }
    }

    if( request.sendRingback )
        startSendRingback();
    else
        stopSendRingback();


    RtpSessionState sessionState = audioStack->getSessionState();
    if( sessionState == rtp_session_sendonly ||
        sessionState == rtp_session_recvonly)
    {
        audioActive = false;
        audioHalfActive = true;
    }
    else
    {
        audioActive = true;
        audioHalfActive = false;
    }

    audioStack->setApiFormat( rtpPayloadPCMU, request.rtpPacketSize*8 );
    audioStack->setNetworkFormat( rtpPayloadPCMU, request.rtpPacketSize*8 );

    deviceMutex.unlock();
    reopenAudioHardware();

    return 0;
} // end SoundCardDevice::audioStart()



//***************************************************************************
// SoundCardDevice::audioStop
//
// description:  tears down audio.  cleans up by delete objects created when
//               audioStart was called...  audioStack, rtp packets.
//***************************************************************************

int
SoundCardDevice::audioStop()
{
    if( !audioActive )
    {
        return 1;
    }

    cerr << "%%% Stopping audio" << endl;

    // mark audio as deactivated.
    audioActive = false;
    audioHalfActive = false;

    vusleep( 200 );
#ifdef WIN32
    deviceMutex.lock(); //AND: or thread must die !!!
#endif
    // should lock here, but seg faults application when unlocking below - kle

    // close RTP session
    if( audioStack )
    {
        RtpSessionState sessionState = audioStack->getSessionState();
        if( sessionState == rtp_session_sendonly ||
            sessionState == rtp_session_sendrecv )
        {
            audioStack->transmitRTCPBYE();
        }
    }

    if( inRtpPkt )
    {
        delete inRtpPkt;
        inRtpPkt = 0;
    }

    if( audioStack )
    {
        delete audioStack;
        audioStack = 0;
    }
#ifdef WIN32
    deviceMutex.unlock();
#endif
    reopenAudioHardware();

    return 0;
} // end SoundCardDevice::audioStop()



//***************************************************************************
// SoundCardDevice::audioSuspend
//
// description: suspend the RTP transmit and receive, and also stop the
//
//***************************************************************************

int
SoundCardDevice::audioSuspend ()
{
    deviceMutex.lock();

    cerr << "%%% Suspending audio" << endl;
    cerr << "Setting all RTP / RTCP ports to 0" << endl; 

    if ( audioStack != 0 )
    {
        //set rtp session to inactive
        audioStack->setSessionState( rtp_session_inactive );
        audioStack->setReceiver( 0, 0, 0, rtpPayloadPCMU, rtpPayloadPCMU, 0 );
        audioStack->setTransmiter( 0, 0, 0, rtpPayloadPCMU, rtpPayloadPCMU );
    }

    deviceMutex.unlock();
    reopenAudioHardware();

    return 0;
} // end SoundCardDevice::audioSuspend()



//***************************************************************************
// SoundCardDevice::audioResume
//
// description:  resume the rtp session using the new sdp information
//               enable the quicknet card audio
//***************************************************************************

int
SoundCardDevice::audioResume( const HardwareAudioRequest& request )
{
    deviceMutex.lock();

    if ( audioStack == 0 )
    {
        cpLog( LOG_ERR, "Try to resume an existing audio channel" );
        cpLog( LOG_ERR, "No existing audio channel" );
        deviceMutex.unlock();
        return 0;
    }

    cerr << "Resuming audio" << endl;
    cerr << "Listening on port: " << request.localPort << endl;
    cerr << "Sending to host: " << request.remoteHost << endl;
    cerr << "Sending to port: " << request.remotePort << endl;
    cerr << "RTP packet size: " << request.rtpPacketSize << endl;

    //resuming audio channel
    //int remoteRtcpPort = (request.remotePort > 0) ? request.remotePort + 1 : 0;
    //int localRtcpPort = (request.localPort > 0) ? request.localPort + 1 : 0;
    const char* remoteHost = 0;
    if( request.remotePort != 0 )
        remoteHost = request.remoteHost;

    if( request.localPort != 0 && request.remotePort != 0 )
    {
        //full duplex audio
        audioStack->setSessionState(rtp_session_sendrecv);
        audioStack->setReceiver(request.localPort, request.localPort + 1, 0,
                                rtpPayloadPCMU, rtpPayloadPCMU, 0);
        audioStack->setTransmiter(request.remoteHost, request.remotePort,
                                  request.remotePort + 1, rtpPayloadPCMU,
                                  rtpPayloadPCMU);
    }
    else if ( request.localPort != 0 )
    {
        //receive only
        audioStack->setSessionState(rtp_session_sendrecv);
        audioStack->setReceiver(request.localPort, request.localPort + 1, 0,
                                rtpPayloadPCMU, rtpPayloadPCMU, 0);
    }
    else if ( request.remotePort != 0 )
    {
        //transmit only
        audioStack->setSessionState( rtp_session_sendrecv );
        audioStack->setTransmiter( request.remoteHost, request.remotePort,
                                   request.remotePort + 1, rtpPayloadPCMU,
                                   rtpPayloadPCMU );
    }

    audioStack->setApiFormat( rtpPayloadPCMU, request.rtpPacketSize*8 );
    audioStack->setNetworkFormat( rtpPayloadPCMU, request.rtpPacketSize*8 );

    if( request.sendRingback )
        startSendRingback();
    else
        stopSendRingback();

    deviceMutex.unlock();
    reopenAudioHardware();

    return 0;
} // end SoundCardDevice::audioResume()



//***************************************************************************
// SoundCardDevice::provideTone
//
// description:  provide the tone for the soundcard by playing
//               a sound file of that particular tone.
//***************************************************************************

void
SoundCardDevice::provideTone( const ToneEmulation tone )
{
    // open ULAW encoded sound file
    int toneFD;
    switch( tone )
    {
    case DialToneEmulation:
        cpLog( LOG_DEBUG, "*** Provide dial tone emulation ***" );
        toneFD = open( "Tone/dialtone", O_RDONLY );
        break;

    case RingbackToneEmulation:
        cpLog( LOG_DEBUG, "*** Provide ringback tone emulation ***" );
        toneFD = open( "Tone/ringback", O_RDONLY );
        break;

    default:
        cpLog( LOG_ERR, "Unsupported tone requested" );
        toneFD = -1;
        break;
    }

    if( toneFD < 0 )
    {
        cpLog( LOG_ERR, "Cannot open tone file" );
        return;
    }


    // play until file ends or hardware event
    reopenAudioHardware();
    bool provideToneLoop = true;
    while( provideToneLoop )
    {
        int cc = read( toneFD, dataBuffer, NETWORK_RTP_RATE );
        if( cc != NETWORK_RTP_RATE )
        {
            // end of file reached
            provideToneLoop = false;
        }

        deviceMutex.lock();

        // play tone sample
        writeToSoundCard( dataBuffer, NETWORK_RTP_RATE );

#ifndef WIN32
        // watch for a key press on stdinFD
        fd_set readFdSet;
        struct timeval tv;
        tv.tv_sec = 0;
        tv.tv_usec = 0;
        FD_ZERO( &readFdSet );
        FD_SET(stdinFD, &readFdSet );
        select( stdinFD+1, &readFdSet, 0, 0, &tv );
        if( FD_ISSET( stdinFD, &readFdSet ) )
        {
            // something in the keyboard buffer
            provideToneLoop = false;
        }
#else
        HANDLE hStdin = GetStdHandle(STD_INPUT_HANDLE);
        INPUT_RECORD        inputRecord;
        DWORD        nRecords;
        if (PeekConsoleInput( hStdin, &inputRecord, 1, &nRecords)
            && nRecords)
        {
            if (inputRecord.Event.KeyEvent.bKeyDown) 
            {
                // something in the keyboard buffer
                provideToneLoop = false;
            }
        }
#endif        
        if( myQ->size() > 0 )
        {
            // need to stop tone and process endpoint msg
            provideToneLoop = false;
        }

        deviceMutex.unlock();
    }

    reopenAudioHardware();
    close( toneFD );
} // end provideTone()


int
SoundCardDevice::getRingbackTone( unsigned char *ringData, const int samples )
{
    // open tone file if first time
    if( ringbackFd == -1 )
    {
        cpLog( LOG_DEBUG, "Opening remote ringback tone file" );
        if( ( ringbackFd = open( "Tone/ringback", O_RDONLY ) ) == -1 )
        {
            cpLog( LOG_ERR, "Fail to open Tone/ringback" );
            return 0;
        }
    }

    // read from tone file
    int cc = read( ringbackFd, (char*)ringData, samples );
    if( cc != samples )
    {
        //AND:may be need close file for reopen at next read() ?
        close(ringbackFd);
        ringbackFd = -1;
        // end of file reached
        return cc;
    }

    return cc;
}



//***************************************************************************
// SoundCardDevice::onhookOrFlash
//
// THIS FEATURE IS TURNED OFF IN THE PHONECARDDEVICE UNTIL QUICKNET
// RELEASES THE SMARTCABLE.
// description:  quicknet does not implement a flash function on their cards.
//               so, we have to implement our own, by checking the hook state
//               of the phone.  this function will tell us whether the phone
//               is being flashed or being placed onhook.
//***************************************************************************


void
SoundCardDevice::onhookOrFlash()
{
    cpLog( LOG_DEBUG, "We know this isn't a flash!" );
}


void
SoundCardDevice::provideDialToneStart()
{
    cpLog( LOG_DEBUG, "***  Start dial tone  ***" );
    provideTone( DialToneEmulation );
}


void
SoundCardDevice::provideDialToneStop()
{
    cpLog( LOG_DEBUG, "***  Stop dial tone  ***" );
    if( playDialTone == true )
    {
        playDialTone = false;
        reopenAudioHardware();
    }
}


void
SoundCardDevice::provideRingStart()
{
    cpLog( LOG_DEBUG, "***  Start Ringing  ***" );
    cout << "Incoming call..." << endl << endl;
    //TODO play some ringing sound to speaker?
    //provideTone( RingbackToneEmulation );
}


void
SoundCardDevice::provideRingStop()
{
    cpLog( LOG_DEBUG, "***  Stop Ringing  ***" );
    reopenAudioHardware();
}


void
SoundCardDevice::provideLocalRingbackStart()
{
    cpLog( LOG_DEBUG, "***  Start local ringback  ***" );
    provideTone( RingbackToneEmulation );
}


void
SoundCardDevice::provideLocalRingbackStop()
{
    cpLog( LOG_DEBUG, "***  Stop local ringback  ***" );
    reopenAudioHardware();
}


void
SoundCardDevice::provideBusyToneStart()
{
    cpLog( LOG_DEBUG, "***  Start busy tone  ***" );
}


void
SoundCardDevice::provideBusyToneStop()
{
    cpLog( LOG_DEBUG, "***  Stop busy tone  ***" );
}


void
SoundCardDevice::provideFastBusyToneStart()
{
    cpLog( LOG_DEBUG, "***  Start fast busy tone  ***" );
}


void
SoundCardDevice::provideFastBusyToneStop()
{
    cpLog( LOG_DEBUG, "***  Stop fast busy tone  ***" );
}


void
SoundCardDevice::provideDtmf( DeviceSignalType signal )
{
    char digit = ' ';
    if ( signal >= DeviceSignalDigit0 && signal <= DeviceSignalDigit9 )
    {
        digit = '0' + signal - DeviceSignalDigit0;
    }
    else if ( signal == DeviceSignalDigitHash )
    {
        digit = '#';
    }
    else if ( signal == DeviceSignalDigitStar )
    {
        digit = '*';
    }
    cpLog( LOG_DEBUG, "***  DTMF %c  ***", digit );
}


void
SoundCardDevice::provideCallInfo(string, string, string)
{
}


#if 0
void
SoundCardDevice::killDialTone()
{
    if( playDialTone == true )
    {
        playDialTone = false;
        cpLog( LOG_DEBUG, "*** Stopping tone emulation ***" );
#ifndef WIN32  //AND:Construction fall on WIN32
        deviceMutex.unlock();
        reopenAudioHardware();
        deviceMutex.unlock();
#endif
    }
}
#endif


void
SoundCardDevice::provideCallWaitingBeepStart()
{
    // Not yet implemented
    cpLog( LOG_DEBUG, "in provideCallWaitingBeepStart() - not completed" );
}


void
SoundCardDevice::provideCallWaitingBeepStop()
{
    // Not yet implemented
    cpLog( LOG_DEBUG, "in provideCallWaitingBeepStop() - not completed" );
}


/* Local Variables: */
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