[Iaxclient-devel] Open Sound System

[Babar S. <bab...@ya...>]

Steve,

Please check this might help you for Sound Volume and Recording Volume control for Open Sound
System.


Regards,
Babar Shafiq Nazmi

//Open Sound System 
#ifdef HAS_OSS  
#define  DEFAULT_MIXER  "/dev/mixer"
int  mixerDev;
int  mixerRecChan;
int  savedMixerRecChan;
int  ossRecVol;
int  ossPlayVol;
#endif

#ifdef HAS_OSS
voice_function(string args)
{
mixerDev = -1;

// make sure mixer isn't disabled
  if (args=="no-sound-mixer")
    return TRUE;

  string mixerDeviceName = DEFAULT_MIXER;
  if (args=="sound-mixer")
    mixerDeviceName = args;

  mixerDev = ::open(mixerDeviceName, O_RDWR);
  if (mixerDev < 0) {
    cout << "warning: Cannot open mixer device " << mixerDeviceName
         << ": " << ::strerror(errno) << endl;
    return TRUE;
  }

  char * mixerChanNames[] = SOUND_DEVICE_NAMES;
  int numMixerChans = SOUND_MIXER_NRDEVICES;

  // get the current record channel setting, and save it
  if (::ioctl(mixerDev, SOUND_MIXER_READ_RECSRC, &savedMixerRecChan) < 0) {
    cout << "warning: cannot get current mixer record channels" << endl;
    savedMixerRecChan = -1;
  }

  // if the user specified a record channel, then find it
  // otherwise, find the currently select record channel
  if (args=="sound-recchan") {
    string mixerRecChanName = args;
    int i;
    for (i = 0; i < numMixerChans; i++)
      if (mixerRecChanName *= mixerChanNames[i])
        break;
    if (i == numMixerChans) {
      cout << "error: Cannot find record mixer channel " << mixerDeviceName << endl;
      return FALSE;
    }
    mixerRecChan = i;
  } else {
    int i;
    for (i = 0; i < numMixerChans; i++)
      if (savedMixerRecChan & (1 << i))
        break;
    if (i == numMixerChans)
      mixerRecChan = SOUND_MIXER_MIC;
    else
      mixerRecChan = i;
  }

  string volStr;
  if (args=="sound-recvol")
    volStr = args;
  else if (args=="recvol")
    volStr = args;

  if (volStr.empty()) {
    ::ioctl(mixerDev, MIXER_READ(mixerRecChan), &ossRecVol);
    ossRecVol &= 0xff;
  } else {
    ossRecVol = (unsigned)atoi(volStr.c_str()); 
    int volVal = ossRecVol | (ossRecVol << 8);
    ::ioctl(mixerDev, MIXER_WRITE(mixerRecChan), &volVal);
  }

  if (args=="sound-playvol")
    volStr = args;
  else if (args=="playvol")
    volStr = args;

  if (volStr.empty()) {
    ::ioctl(mixerDev, SOUND_MIXER_READ_VOLUME, &ossPlayVol);
    ossPlayVol &= 0xff;
  } else {

    ossPlayVol = (unsigned)  atoi(volStr.c_str()); 
    int volVal = ossPlayVol | (ossPlayVol << 8);
    ::ioctl(mixerDev, SOUND_MIXER_WRITE_PCM, &volVal);
  }
  }
}//end of voice_function
#else
//for Win32 Code will be here
voice_function(string args)
{
.
.
.
}
#endif


=====
God is a great Programmer

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