C++ (Cpp) CCoreAudioDevice示例

示例#1

文件： CoreAudioHardware.cpp 项目： Foozle303/xbmc

AudioDeviceID CCoreAudioHardware::FindAudioDevice(const std::string &searchName)
{
  AudioDeviceID deviceId = 0;

  if (!searchName.length())
    return deviceId;

  std::string searchNameLowerCase = searchName;
  std::transform(searchNameLowerCase.begin(), searchNameLowerCase.end(), searchNameLowerCase.begin(), ::tolower );
  if (searchNameLowerCase.compare("default") == 0)
  {
    AudioDeviceID defaultDevice = GetDefaultOutputDevice();
    CLog::Log(LOGDEBUG, "CCoreAudioHardware::FindAudioDevice: "
      "Returning default device [0x%04x].", (uint)defaultDevice);
    return defaultDevice;
  }
  CLog::Log(LOGDEBUG, "CCoreAudioHardware::FindAudioDevice: "
    "Searching for device - %s.", searchName.c_str());

  // Obtain a list of all available audio devices
  UInt32 size = 0;
  AudioHardwareGetPropertyInfo(kAudioHardwarePropertyDevices, &size, NULL);
  size_t deviceCount = size / sizeof(AudioDeviceID);
  AudioDeviceID* pDevices = new AudioDeviceID[deviceCount];
  OSStatus ret = AudioHardwareGetProperty(kAudioHardwarePropertyDevices, &size, pDevices);
  if (ret)
  {
    CLog::Log(LOGERROR, "CCoreAudioHardware::FindAudioDevice: "
      "Unable to retrieve the list of available devices. Error = %s", GetError(ret).c_str());
    delete[] pDevices;
    return 0;
  }

  // Attempt to locate the requested device
  std::string deviceName;
  for (size_t dev = 0; dev < deviceCount; dev++)
  {
    CCoreAudioDevice device;
    device.Open((pDevices[dev]));
    deviceName = device.GetName();
    UInt32 totalChannels = device.GetTotalOutputChannels();
    CLog::Log(LOGDEBUG, "CCoreAudioHardware::FindAudioDevice: "
#if __LP64__
      "Device[0x%04x]"
#else
      "Device[0x%04lx]"
#endif
      " - Name: '%s', Total Ouput Channels: %u. ",
      pDevices[dev], deviceName.c_str(), (uint)totalChannels);

    std::transform( deviceName.begin(), deviceName.end(), deviceName.begin(), ::tolower );
    if (searchNameLowerCase.compare(deviceName) == 0)
      deviceId = pDevices[dev];
    if (deviceId)
      break;
  }
  delete[] pDevices;

  return deviceId;
}

示例#2

文件： CoreAudio.cpp 项目： vanegithub/xbmc

AudioDeviceID CCoreAudioHardware::FindAudioDevice(CStdString searchName)
{
  if (!searchName.length())
    return 0;
  
  UInt32 size = 0;
  AudioDeviceID deviceId = 0;
  OSStatus ret;
 
  if (searchName.Equals("Default Output Device"))
  {
    AudioDeviceID defaultDevice = GetDefaultOutputDevice();
    CLog::Log(LOGDEBUG, "CCoreAudioHardware::FindAudioDevice: Returning default device [0x%04x].", defaultDevice);
    return defaultDevice;  
  }
  CLog::Log(LOGDEBUG, "CCoreAudioHardware::FindAudioDevice: Searching for device - %s.", searchName.c_str());
  
  // Obtain a list of all available audio devices
  AudioHardwareGetPropertyInfo(kAudioHardwarePropertyDevices, &size, NULL);
  UInt32 deviceCount = size / sizeof(AudioDeviceID);
  AudioDeviceID* pDevices = new AudioDeviceID[deviceCount];
  ret = AudioHardwareGetProperty(kAudioHardwarePropertyDevices, &size, pDevices);
  if (ret)
  { 
    CLog::Log(LOGERROR, "CCoreAudioHardware::FindAudioDevice: Unable to retrieve the list of available devices. Error = 0x%08x (%4.4s)", ret, CONVERT_OSSTATUS(ret));
    delete[] pDevices;
    return 0; 
  }
  
  // Attempt to locate the requested device
  CStdString deviceName;
  for (UInt32 dev = 0; dev < deviceCount; dev++)
  {
    CCoreAudioDevice device;
    device.Open((pDevices[dev]));
    device.GetName(deviceName);
    UInt32 totalChannels = device.GetTotalOutputChannels();
    CLog::Log(LOGDEBUG, "CCoreAudioHardware::FindAudioDevice:   Device[0x%04x] - Name: '%s', Total Ouput Channels: %u. ", pDevices[dev], deviceName.c_str(), totalChannels);
    if (searchName.Equals(deviceName))
      deviceId = pDevices[dev];
    if (deviceId)
      break;
  }
  delete[] pDevices;  
  
  return deviceId;
}

示例#3

文件： CoreAudioHardware.cpp 项目： 0xheart0/xbmc

void CCoreAudioHardware::ResetAudioDevices()
{
  CLog::Log(LOGDEBUG, "CCoreAudioHardware::ResetAudioDevices resetting our devices to LPCM");
  CoreAudioDeviceList list;
  if (GetOutputDevices(&list))
  {
    for (CoreAudioDeviceList::iterator it = list.begin(); it != list.end(); ++it)
    {
      CCoreAudioDevice device = *it;

      AudioStreamIdList streams;
      if (device.GetStreams(&streams))
      {
        CLog::Log(LOGDEBUG, "CCoreAudioHardware::ResetAudioDevices %lu streams for device %s", streams.size(), device.GetName().c_str());
        for (AudioStreamIdList::iterator ait = streams.begin(); ait != streams.end(); ++ait)
          ResetStream(*ait);
      }
    }
  }
}

示例#4

文件： CoreAudioHardware.cpp 项目： 2BReality/xbmc

AudioDeviceID CCoreAudioHardware::FindAudioDevice(const std::string &searchName)
{
  AudioDeviceID deviceId = 0;

  if (!searchName.length())
    return deviceId;

  std::string searchNameLowerCase = searchName;
  std::transform(searchNameLowerCase.begin(), searchNameLowerCase.end(), searchNameLowerCase.begin(), ::tolower );
  if (searchNameLowerCase.compare("default") == 0)
  {
    AudioDeviceID defaultDevice = GetDefaultOutputDevice();
    CLog::Log(LOGDEBUG, "CCoreAudioHardware::FindAudioDevice: "
      "Returning default device [0x%04x].", (uint)defaultDevice);
    return defaultDevice;
  }
  CLog::Log(LOGDEBUG, "CCoreAudioHardware::FindAudioDevice: "
    "Searching for device - %s.", searchName.c_str());

  // Obtain a list of all available audio devices
  AudioObjectPropertyAddress propertyAddress; 
  propertyAddress.mScope    = kAudioObjectPropertyScopeGlobal; 
  propertyAddress.mElement  = kAudioObjectPropertyElementMaster;
  propertyAddress.mSelector = kAudioHardwarePropertyDevices; 

  UInt32 size = 0;
  OSStatus ret = AudioObjectGetPropertyDataSize(kAudioObjectSystemObject, &propertyAddress, 0, NULL, &size); 
  if (ret != noErr)
  {
    CLog::Log(LOGERROR, "CCoreAudioHardware::FindAudioDevice: "
      "Unable to retrieve the size of the list of available devices. Error = %s", GetError(ret).c_str());
    return 0;
  }

  size_t deviceCount = size / sizeof(AudioDeviceID);
  AudioDeviceID* pDevices = new AudioDeviceID[deviceCount];
  ret = AudioObjectGetPropertyData(kAudioObjectSystemObject, &propertyAddress, 0, NULL, &size, pDevices);
  if (ret != noErr)
  {
    CLog::Log(LOGERROR, "CCoreAudioHardware::FindAudioDevice: "
      "Unable to retrieve the list of available devices. Error = %s", GetError(ret).c_str());
    delete[] pDevices;
    return 0;
  }

  // Attempt to locate the requested device
  std::string deviceName;
  for (size_t dev = 0; dev < deviceCount; dev++)
  {
    CCoreAudioDevice device;
    device.Open((pDevices[dev]));
    deviceName = device.GetName();
    std::transform( deviceName.begin(), deviceName.end(), deviceName.begin(), ::tolower );
    if (searchNameLowerCase.compare(deviceName) == 0)
      deviceId = pDevices[dev];
    if (deviceId)
      break;
  }
  delete[] pDevices;

  return deviceId;
}