freeswitch/libs/portaudio/bindings/cpp/include/portaudiocpp/System.hxx

#ifndef INCLUDED_PORTAUDIO_SYSTEM_HXX
#define INCLUDED_PORTAUDIO_SYSTEM_HXX

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

#include "portaudio.h"

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

// Forward declaration(s):
namespace portaudio
{
	class Device;
	class Stream;
	class HostApi;
}

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

// Declaration(s):
namespace portaudio
{


	//////
	/// @brief System singleton which represents the PortAudio system.
	///
	/// The System is used to initialize/terminate PortAudio and provide 
	/// a single acccess point to the PortAudio System (instance()).
	/// It can be used to iterate through all HostApi 's in the System as 
	/// well as all devices in the System. It also provides some utility 
	/// functionality of PortAudio.
	///
	/// Terminating the System will also abort and close the open streams. 
	/// The Stream objects will need to be deallocated by the client though 
	/// (it's usually a good idea to have them cleaned up automatically).
	//////
	class System
	{
	public:
		class HostApiIterator; // forward declaration
		class DeviceIterator; // forward declaration

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

		static int version();
		static const char *versionText();

		static void initialize();
		static void terminate();

		static System &instance();
		static bool exists();

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

		// host apis:
		HostApiIterator hostApisBegin();
		HostApiIterator hostApisEnd();

		HostApi &defaultHostApi();

		HostApi &hostApiByTypeId(PaHostApiTypeId type);
		HostApi &hostApiByIndex(PaHostApiIndex index);

		int hostApiCount();

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

		// devices:
		DeviceIterator devicesBegin();
		DeviceIterator devicesEnd();

		Device &defaultInputDevice();
		Device &defaultOutputDevice();

		Device &deviceByIndex(PaDeviceIndex index);

		int deviceCount();

		static Device &nullDevice();

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

		// misc:
		void sleep(long msec);
		int sizeOfSample(PaSampleFormat format);

	private:
		System();
		~System();

		static System *instance_;
		static int initCount_;

		static HostApi **hostApis_;
		static Device **devices_;

		static Device *nullDevice_;
	};


} // namespace portaudio


#endif // INCLUDED_PORTAUDIO_SYSTEM_HXX