portaudio/bindings/cpp/example/devs.cxx

#include <iostream>
#include "portaudiocpp/PortAudioCpp.hxx"

#ifdef WIN32
#include "portaudiocpp/AsioDeviceAdapter.hxx"
#endif

// ---------------------------------------------------------------------------------------

void printSupportedStandardSampleRates(
		const portaudio::DirectionSpecificStreamParameters &inputParameters, 
		const portaudio::DirectionSpecificStreamParameters &outputParameters)
{
	static double STANDARD_SAMPLE_RATES[] = {
		8000.0, 9600.0, 11025.0, 12000.0, 16000.0, 22050.0, 24000.0, 32000.0,
		44100.0, 48000.0, 88200.0, 96000.0, -1 }; // negative terminated list

	int printCount = 0;

	for (int i = 0; STANDARD_SAMPLE_RATES[i] > 0; ++i)
	{
		portaudio::StreamParameters tmp = portaudio::StreamParameters(inputParameters, outputParameters, STANDARD_SAMPLE_RATES[i], 0, paNoFlag);

		if (tmp.isSupported())
		{
			if (printCount == 0)
			{
				std::cout << "    " << STANDARD_SAMPLE_RATES[i]; // 8.2
				printCount = 1;
			}
			else if (printCount == 4)
			{
				std::cout << "," << std::endl;
				std::cout << "    " << STANDARD_SAMPLE_RATES[i]; // 8.2
				printCount = 1;
			}
			else
			{
				std::cout << ", " << STANDARD_SAMPLE_RATES[i]; // 8.2
				++printCount;
			}
		}
	}

	if (printCount == 0)
		std::cout << "None" << std::endl;
	else
		std::cout << std::endl;
}

// ---------------------------------------------------------------------------------------

int main(int, char*[]);
int main(int, char*[])
{
	try
	{
		portaudio::AutoSystem autoSys;

		portaudio::System &sys = portaudio::System::instance();

		std::cout << "PortAudio version number = " << sys.version() << std::endl;
		std::cout << "PortAudio version text = '" << sys.versionText() << "'" << std::endl;

		int numDevices = sys.deviceCount();
		std::cout << "Number of devices = " << numDevices << std::endl;

		for (portaudio::System::DeviceIterator i = sys.devicesBegin(); i != sys.devicesEnd(); ++i)
		{
			std::cout << "--------------------------------------- device #" << (*i).index() << std::endl;

			// Mark global and API specific default devices:
			bool defaultDisplayed = false;

			if ((*i).isSystemDefaultInputDevice())
			{
				std::cout << "[ Default Input";
				defaultDisplayed = true;
			}
			else if ((*i).isHostApiDefaultInputDevice())
			{
				std::cout << "[ Default " << (*i).hostApi().name() << " Input";
				defaultDisplayed = true;
			}

			if ((*i).isSystemDefaultOutputDevice())
			{
				std::cout << (defaultDisplayed ? "," : "[");
				std::cout << " Default Output";
				defaultDisplayed = true;
			}
			else if ((*i).isHostApiDefaultOutputDevice())
			{
				std::cout << (defaultDisplayed ? "," : "[");
				std::cout << " Default " << (*i).hostApi().name() << " Output";
				defaultDisplayed = true;
			}
			
			if (defaultDisplayed)
				std::cout << " ]" << std::endl;

			// Print device info:
			std::cout << "Name                        = " << (*i).name() << std::endl;
			std::cout << "Host API                    = " << (*i).hostApi().name() << std::endl;
			std::cout << "Max inputs = " << (*i).maxInputChannels() << ", Max outputs = " << (*i).maxOutputChannels() << std::endl;

			std::cout << "Default low input latency   = " << (*i).defaultLowInputLatency() << std::endl; // 8.3
			std::cout << "Default low output latency  = " << (*i).defaultLowOutputLatency() << std::endl; // 8.3
			std::cout << "Default high input latency  = " << (*i).defaultHighInputLatency() << std::endl; // 8.3
			std::cout << "Default high output latency = " << (*i).defaultHighOutputLatency() << std::endl; // 8.3

#ifdef WIN32
			// ASIO specific latency information:
			if ((*i).hostApi().typeId() == paASIO)
			{
				portaudio::AsioDeviceAdapter asioDevice((*i));

				std::cout << "ASIO minimum buffer size    = " << asioDevice.minBufferSize() << std::endl;
				std::cout << "ASIO maximum buffer size    = " << asioDevice.maxBufferSize() << std::endl;
				std::cout << "ASIO preferred buffer size  = " << asioDevice.preferredBufferSize() << std::endl;

				if (asioDevice.granularity() == -1)
					std::cout << "ASIO buffer granularity     = power of 2" << std::endl;
				else
					std::cout << "ASIO buffer granularity     = " << asioDevice.granularity() << std::endl;
			}
#endif // WIN32

			std::cout << "Default sample rate         = " << (*i).defaultSampleRate() << std::endl; // 8.2

			// Poll for standard sample rates:
			portaudio::DirectionSpecificStreamParameters inputParameters((*i), (*i).maxInputChannels(), portaudio::INT16, true, 0.0, NULL);
			portaudio::DirectionSpecificStreamParameters outputParameters((*i), (*i).maxOutputChannels(), portaudio::INT16, true, 0.0, NULL);

			if (inputParameters.numChannels() > 0)
			{
				std::cout << "Supported standard sample rates" << std::endl;
				std::cout << " for half-duplex 16 bit " << inputParameters.numChannels() << " channel input = " << std::endl;
				printSupportedStandardSampleRates(inputParameters, portaudio::DirectionSpecificStreamParameters::null());
			}

			if (outputParameters.numChannels() > 0)
			{
				std::cout << "Supported standard sample rates" << std::endl;
				std::cout << " for half-duplex 16 bit " << outputParameters.numChannels() << " channel output = " << std::endl;
				printSupportedStandardSampleRates(portaudio::DirectionSpecificStreamParameters::null(), outputParameters);
			}

			if (inputParameters.numChannels() > 0 && outputParameters.numChannels() > 0)
			{
				std::cout << "Supported standard sample rates" << std::endl;
				std::cout << " for full-duplex 16 bit " << inputParameters.numChannels() << " channel input, " << outputParameters.numChannels() << " channel output = " << std::endl;
				printSupportedStandardSampleRates(inputParameters, outputParameters);
			}
		}

		std::cout << "----------------------------------------------" << std::endl;
	}
	catch (const portaudio::PaException &e)
	{
		std::cout << "A PortAudio error occurred: " << e.paErrorText() << std::endl;
	}
	catch (const portaudio::PaCppException &e)
	{
		std::cout << "A PortAudioCpp error occurred: " << e.what() << std::endl;
	}
	catch (const std::exception &e)
	{
		std::cout << "A generic exception occurred: " << e.what() << std::endl;
	}
	catch (...)
	{
		std::cout << "An unknown exception occurred." << std::endl;
	}

	return 0;
}