cannam@124: #include "portaudiocpp/CppFunCallbackStream.hxx"
cannam@124: 
cannam@124: #include "portaudiocpp/StreamParameters.hxx"
cannam@124: #include "portaudiocpp/Exception.hxx"
cannam@124: 
cannam@124: namespace portaudio
cannam@124: {
cannam@124: 	namespace impl
cannam@124: 	{
cannam@124: 		//////
cannam@124: 		/// Adapts any a C++ callback to a C-callable function (ie this function). A 
cannam@124: 		/// pointer to a struct with the C++ function pointer and the actual user data should be 
cannam@124: 		/// passed as the ``userData'' parameter when setting up the callback.
cannam@124: 		//////
cannam@124: 		int cppCallbackToPaCallbackAdapter(const void *inputBuffer, void *outputBuffer, unsigned long numFrames, 
cannam@124: 			const PaStreamCallbackTimeInfo *timeInfo, PaStreamCallbackFlags statusFlags, void *userData)
cannam@124: 		{
cannam@124: 			FunCallbackStream::CppToCCallbackData *data = static_cast<FunCallbackStream::CppToCCallbackData *>(userData);
cannam@124: 			return data->funPtr(inputBuffer, outputBuffer, numFrames, timeInfo, statusFlags, data->userData);
cannam@124: 		}
cannam@124: 	}
cannam@124: 
cannam@124: 	// -----------------------------------------------------------------------------------
cannam@124: 
cannam@124: 	FunCallbackStream::CppToCCallbackData::CppToCCallbackData()
cannam@124: 	{
cannam@124: 	}
cannam@124: 
cannam@124: 	FunCallbackStream::CppToCCallbackData::CppToCCallbackData(CallbackFunPtr funPtr, void *userData) : funPtr(funPtr), userData(userData)
cannam@124: 	{
cannam@124: 	}
cannam@124: 
cannam@124: 	void FunCallbackStream::CppToCCallbackData::init(CallbackFunPtr funPtr, void *userData)
cannam@124: 	{
cannam@124: 		this->funPtr = funPtr;
cannam@124: 		this->userData = userData;
cannam@124: 	}
cannam@124: 
cannam@124: 	// -----------------------------------------------------------------------------------
cannam@124: 
cannam@124: 	FunCallbackStream::FunCallbackStream()
cannam@124: 	{
cannam@124: 	}
cannam@124: 
cannam@124: 	FunCallbackStream::FunCallbackStream(const StreamParameters &parameters, CallbackFunPtr funPtr, void *userData) : adapterData_(funPtr, userData)
cannam@124: 	{
cannam@124: 		open(parameters);
cannam@124: 	}
cannam@124: 
cannam@124: 	FunCallbackStream::~FunCallbackStream()
cannam@124: 	{
cannam@124: 		try
cannam@124: 		{
cannam@124: 			close();
cannam@124: 		}
cannam@124: 		catch (...)
cannam@124: 		{
cannam@124: 			// ignore all errors
cannam@124: 		}
cannam@124: 	}
cannam@124: 
cannam@124: 	void FunCallbackStream::open(const StreamParameters &parameters, CallbackFunPtr funPtr, void *userData)
cannam@124: 	{
cannam@124: 		adapterData_.init(funPtr, userData);
cannam@124: 		open(parameters);
cannam@124: 	}
cannam@124: 
cannam@124: 	void FunCallbackStream::open(const StreamParameters &parameters)
cannam@124: 	{
cannam@124: 		PaError err = Pa_OpenStream(&stream_, parameters.inputParameters().paStreamParameters(), parameters.outputParameters().paStreamParameters(), 
cannam@124: 			parameters.sampleRate(), parameters.framesPerBuffer(), parameters.flags(), &impl::cppCallbackToPaCallbackAdapter, 
cannam@124: 			static_cast<void *>(&adapterData_));
cannam@124: 
cannam@124: 		if (err != paNoError)
cannam@124: 		{
cannam@124: 			throw PaException(err);
cannam@124: 		}
cannam@124: 	}
cannam@124: 
cannam@124: 	// -----------------------------------------------------------------------------------
cannam@124: }