Method getDeviceInfo

examples/TinyAudio/RtAudio.cpp:617–876

}

RtAudio::DeviceInfo RtApiCore ::getDeviceInfo(unsigned int device)
{
	RtAudio::DeviceInfo info;
	info.probed = false;

	// Get device ID
	unsigned int nDevices = getDeviceCount();
	if (nDevices == 0)
	{
		errorText_ = "RtApiCore::getDeviceInfo: no devices found!";
		error(RtAudioError::INVALID_USE);
		return info;
	}

	if (device >= nDevices)
	{
		errorText_ = "RtApiCore::getDeviceInfo: device ID is invalid!";
		error(RtAudioError::INVALID_USE);
		return info;
	}

	AudioDeviceID deviceList[nDevices];
	UInt32 dataSize = sizeof(AudioDeviceID) * nDevices;
	AudioObjectPropertyAddress property = {kAudioHardwarePropertyDevices,
										   kAudioObjectPropertyScopeGlobal,
										   kAudioObjectPropertyElementMaster};
	OSStatus result = AudioObjectGetPropertyData(kAudioObjectSystemObject, &property,
												 0, NULL, &dataSize, (void *)&deviceList);
	if (result != noErr)
	{
		errorText_ = "RtApiCore::getDeviceInfo: OS-X system error getting device IDs.";
		error(RtAudioError::WARNING);
		return info;
	}

	AudioDeviceID id = deviceList[device];

	// Get the device name.
	info.name.erase();
	CFStringRef cfname;
	dataSize = sizeof(CFStringRef);
	property.mSelector = kAudioObjectPropertyManufacturer;
	result = AudioObjectGetPropertyData(id, &property, 0, NULL, &dataSize, &cfname);
	if (result != noErr)
	{
		errorStream_ << "RtApiCore::probeDeviceInfo: system error (" << getErrorCode(result) << ") getting device manufacturer.";
		errorText_ = errorStream_.str();
		error(RtAudioError::WARNING);
		return info;
	}

	//const char *mname = CFStringGetCStringPtr( cfname, CFStringGetSystemEncoding() );
	int length = CFStringGetLength(cfname);
	char *mname = (char *)malloc(length * 3 + 1);
#if defined(UNICODE) || defined(_UNICODE)
	CFStringGetCString(cfname, mname, length * 3 + 1, kCFStringEncodingUTF8);
#else
	CFStringGetCString(cfname, mname, length * 3 + 1, CFStringGetSystemEncoding());