C++ (Cpp) update_output_parameters Beispiele

Beispiel #1

Datei: wave.c Projekt: leonardder/espeak-ng

static const PaDeviceInfo *select_device(const char *device)
{
#if (USE_PORTAUDIO == 19)
	int numDevices = Pa_GetDeviceCount();
#else
	int numDevices = Pa_CountDevices();
#endif
	if (numDevices < 0)
		return NULL;

#if (USE_PORTAUDIO == 19)
	PaDeviceIndex i = 0, selectedIndex = 0;
#else
	PaDeviceID i = 0, selectedIndex = 0;
#endif
	const PaDeviceInfo *deviceInfo = NULL;
	const PaDeviceInfo *selectedDeviceInfo = NULL;

	if (option_device_number >= 0) {
		selectedIndex = option_device_number;
		selectedDeviceInfo = Pa_GetDeviceInfo(selectedIndex);
	}

	if (device == NULL) {
#if (USE_PORTAUDIO == 19)
		selectedIndex = Pa_GetDefaultOutputDevice();
#else
		selectedIndex = Pa_GetDefaultOutputDeviceID();
#endif
		selectedDeviceInfo = Pa_GetDeviceInfo(selectedIndex);
	}

	if (selectedDeviceInfo == NULL) {
		for (i = 0; i < numDevices; i++) {
			deviceInfo = Pa_GetDeviceInfo(i);

			if (deviceInfo != NULL && !strcmp(device, deviceInfo->name)) {
				selectedIndex = i;
				selectedDeviceInfo = deviceInfo;
			}
		}
	}

	if (selectedDeviceInfo)
		update_output_parameters(selectedIndex, selectedDeviceInfo);
	return selectedDeviceInfo;
}

Beispiel #2

Datei: wave.cpp Projekt: Jongsix/espeak

static void select_device(const char* the_api)
{
	ENTER("select_device");

#if (USE_PORTAUDIO == 19)
	int numDevices = Pa_GetDeviceCount();
	if( numDevices < 0 )
	{
		SHOW( "ERROR: Pa_CountDevices returned 0x%x\n", numDevices );
		assert(0);
	}

	PaDeviceIndex i=0, selectedIndex=0, defaultAlsaIndex=numDevices;
	const PaDeviceInfo *deviceInfo=NULL;
	const PaDeviceInfo *selectedDeviceInfo=NULL;

	if(option_device_number >= 0)
	{
		selectedIndex = option_device_number;
		selectedDeviceInfo = Pa_GetDeviceInfo(selectedIndex);
	}

	if(selectedDeviceInfo == NULL)
	{
		for( i=0; i<numDevices; i++ )
		{
		deviceInfo = Pa_GetDeviceInfo( i );
	
			if (deviceInfo == NULL)
			{
				break;
			}
			const PaHostApiInfo *hostInfo = Pa_GetHostApiInfo( deviceInfo->hostApi );
	
			if (hostInfo && hostInfo->type == paALSA)
			{ 
				// Check (once) the default output device
				if (defaultAlsaIndex == numDevices)
				{
					defaultAlsaIndex = hostInfo->defaultOutputDevice;
					const PaDeviceInfo *deviceInfo = Pa_GetDeviceInfo( defaultAlsaIndex );
					update_output_parameters(defaultAlsaIndex, deviceInfo);
					if (Pa_IsFormatSupported(NULL, &myOutputParameters, wave_samplerate) == 0)
					{
						SHOW( "select_device > ALSA (default), name=%s (#%d)\n", deviceInfo->name, defaultAlsaIndex);		  
						selectedIndex = defaultAlsaIndex;
						selectedDeviceInfo = deviceInfo;
						break;
					}
				}
	
				// if the default output device does not match, 
				// look for the device with the highest number of output channels 
				SHOW( "select_device > ALSA, i=%d (numDevices=%d)\n", i, numDevices);
	
				update_output_parameters(i, deviceInfo);
	
				if (Pa_IsFormatSupported(NULL, &myOutputParameters, wave_samplerate) == 0)
				{
					SHOW( "select_device > ALSA, name=%s (#%d)\n", deviceInfo->name, i);
	
					if (!selectedDeviceInfo
						|| (selectedDeviceInfo->maxOutputChannels < deviceInfo->maxOutputChannels))
					{
						selectedIndex = i;
						selectedDeviceInfo = deviceInfo;
					}
				}
			}
		}
	}

	if (selectedDeviceInfo)
	{
		update_output_parameters(selectedIndex, selectedDeviceInfo);
	}
	else 
	{
		i = Pa_GetDefaultOutputDevice();
		deviceInfo = Pa_GetDeviceInfo( i );
		update_output_parameters(i, deviceInfo);
	}

#endif    
}