Chris@39: #ifndef INCLUDED_PORTAUDIO_MEMFUNCALLBACKSTREAM_HXX
Chris@39: #define INCLUDED_PORTAUDIO_MEMFUNCALLBACKSTREAM_HXX
Chris@39: 
Chris@39: // ---------------------------------------------------------------------------------------
Chris@39: 
Chris@39: #include "portaudio.h"
Chris@39: 
Chris@39: #include "portaudiocpp/CallbackStream.hxx"
Chris@39: #include "portaudiocpp/CallbackInterface.hxx"
Chris@39: #include "portaudiocpp/StreamParameters.hxx"
Chris@39: #include "portaudiocpp/Exception.hxx"
Chris@39: #include "portaudiocpp/InterfaceCallbackStream.hxx"
Chris@39: 
Chris@39: // ---------------------------------------------------------------------------------------
Chris@39: 
Chris@39: namespace portaudio
Chris@39: {
Chris@39: 
Chris@39: 
Chris@39: 	//////
Chris@39: 	/// @brief Callback stream using a class's member function as a callback. Template argument T is the type of the 
Chris@39: 	/// class of which a member function is going to be used.
Chris@39: 	///
Chris@39: 	/// Example usage:
Chris@39: 	/// @verbatim MemFunCallback<MyClass> stream = MemFunCallbackStream(parameters, *this, &MyClass::myCallbackFunction); @endverbatim
Chris@39: 	//////
Chris@39: 	template<typename T>
Chris@39: 	class MemFunCallbackStream : public CallbackStream
Chris@39: 	{
Chris@39: 	public:
Chris@39: 		typedef int (T::*CallbackFunPtr)(const void *, void *, unsigned long, const PaStreamCallbackTimeInfo *, 
Chris@39: 			PaStreamCallbackFlags);
Chris@39: 
Chris@39: 		// -------------------------------------------------------------------------------
Chris@39: 
Chris@39: 		MemFunCallbackStream()
Chris@39: 		{
Chris@39: 		}
Chris@39: 
Chris@39: 		MemFunCallbackStream(const StreamParameters &parameters, T &instance, CallbackFunPtr memFun) : adapter_(instance, memFun)
Chris@39: 		{
Chris@39: 			open(parameters);
Chris@39: 		}
Chris@39: 
Chris@39: 		~MemFunCallbackStream()
Chris@39: 		{
Chris@39: 			close();
Chris@39: 		}
Chris@39: 
Chris@39: 		void open(const StreamParameters &parameters, T &instance, CallbackFunPtr memFun)
Chris@39: 		{
Chris@39: 			// XXX:	need to check if already open?
Chris@39: 
Chris@39: 			adapter_.init(instance, memFun);
Chris@39: 			open(parameters);
Chris@39: 		}
Chris@39: 
Chris@39: 	private:
Chris@39: 		MemFunCallbackStream(const MemFunCallbackStream &); // non-copyable
Chris@39: 		MemFunCallbackStream &operator=(const MemFunCallbackStream &); // non-copyable
Chris@39: 
Chris@39: 		//////
Chris@39: 		/// @brief Inner class which adapts a member function callback to a CallbackInterface compliant 
Chris@39: 		/// class (so it can be adapted using the paCallbackAdapter function).
Chris@39: 		//////
Chris@39: 		class MemFunToCallbackInterfaceAdapter : public CallbackInterface
Chris@39: 		{
Chris@39: 		public:
Chris@39: 			MemFunToCallbackInterfaceAdapter() {}
Chris@39: 			MemFunToCallbackInterfaceAdapter(T &instance, CallbackFunPtr memFun) : instance_(&instance), memFun_(memFun) {}
Chris@39: 
Chris@39: 			void init(T &instance, CallbackFunPtr memFun)
Chris@39: 			{
Chris@39: 				instance_ = &instance;
Chris@39: 				memFun_ = memFun;
Chris@39: 			}
Chris@39: 
Chris@39: 			int paCallbackFun(const void *inputBuffer, void *outputBuffer, unsigned long numFrames, 
Chris@39: 				const PaStreamCallbackTimeInfo *timeInfo, PaStreamCallbackFlags statusFlags)
Chris@39: 			{
Chris@39: 				return (instance_->*memFun_)(inputBuffer, outputBuffer, numFrames, timeInfo, statusFlags);
Chris@39: 			}
Chris@39: 
Chris@39: 		private:
Chris@39: 			T *instance_;
Chris@39: 			CallbackFunPtr memFun_;
Chris@39: 		};
Chris@39: 
Chris@39: 		MemFunToCallbackInterfaceAdapter adapter_;
Chris@39: 
Chris@39: 		void open(const StreamParameters &parameters)
Chris@39: 		{
Chris@39: 			PaError err = Pa_OpenStream(&stream_, parameters.inputParameters().paStreamParameters(), parameters.outputParameters().paStreamParameters(), 
Chris@39: 				parameters.sampleRate(), parameters.framesPerBuffer(), parameters.flags(), &impl::callbackInterfaceToPaCallbackAdapter, 
Chris@39: 				static_cast<void *>(&adapter_));
Chris@39: 
Chris@39: 			if (err != paNoError)
Chris@39: 				throw PaException(err);
Chris@39: 		}
Chris@39: 	};
Chris@39: 
Chris@39: 
Chris@39: } // portaudio
Chris@39: 
Chris@39: // ---------------------------------------------------------------------------------------
Chris@39: 
Chris@39: #endif // INCLUDED_PORTAUDIO_MEMFUNCALLBACKSTREAM_HXX