diff src/portaudio_20140130/bindings/cpp/source/portaudiocpp/CppFunCallbackStream.cxx @ 124:e3d5853d5918

Current stable PortAudio source

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/portaudio_20140130/bindings/cpp/source/portaudiocpp/CppFunCallbackStream.cxx	Tue Oct 18 13:11:05 2016 +0100
@@ -0,0 +1,81 @@
+#include "portaudiocpp/CppFunCallbackStream.hxx"
+
+#include "portaudiocpp/StreamParameters.hxx"
+#include "portaudiocpp/Exception.hxx"
+
+namespace portaudio
+{
+	namespace impl
+	{
+		//////
+		/// Adapts any a C++ callback to a C-callable function (ie this function). A 
+		/// pointer to a struct with the C++ function pointer and the actual user data should be 
+		/// passed as the ``userData'' parameter when setting up the callback.
+		//////
+		int cppCallbackToPaCallbackAdapter(const void *inputBuffer, void *outputBuffer, unsigned long numFrames, 
+			const PaStreamCallbackTimeInfo *timeInfo, PaStreamCallbackFlags statusFlags, void *userData)
+		{
+			FunCallbackStream::CppToCCallbackData *data = static_cast<FunCallbackStream::CppToCCallbackData *>(userData);
+			return data->funPtr(inputBuffer, outputBuffer, numFrames, timeInfo, statusFlags, data->userData);
+		}
+	}
+
+	// -----------------------------------------------------------------------------------
+
+	FunCallbackStream::CppToCCallbackData::CppToCCallbackData()
+	{
+	}
+
+	FunCallbackStream::CppToCCallbackData::CppToCCallbackData(CallbackFunPtr funPtr, void *userData) : funPtr(funPtr), userData(userData)
+	{
+	}
+
+	void FunCallbackStream::CppToCCallbackData::init(CallbackFunPtr funPtr, void *userData)
+	{
+		this->funPtr = funPtr;
+		this->userData = userData;
+	}
+
+	// -----------------------------------------------------------------------------------
+
+	FunCallbackStream::FunCallbackStream()
+	{
+	}
+
+	FunCallbackStream::FunCallbackStream(const StreamParameters &parameters, CallbackFunPtr funPtr, void *userData) : adapterData_(funPtr, userData)
+	{
+		open(parameters);
+	}
+
+	FunCallbackStream::~FunCallbackStream()
+	{
+		try
+		{
+			close();
+		}
+		catch (...)
+		{
+			// ignore all errors
+		}
+	}
+
+	void FunCallbackStream::open(const StreamParameters &parameters, CallbackFunPtr funPtr, void *userData)
+	{
+		adapterData_.init(funPtr, userData);
+		open(parameters);
+	}
+
+	void FunCallbackStream::open(const StreamParameters &parameters)
+	{
+		PaError err = Pa_OpenStream(&stream_, parameters.inputParameters().paStreamParameters(), parameters.outputParameters().paStreamParameters(), 
+			parameters.sampleRate(), parameters.framesPerBuffer(), parameters.flags(), &impl::cppCallbackToPaCallbackAdapter, 
+			static_cast<void *>(&adapterData_));
+
+		if (err != paNoError)
+		{
+			throw PaException(err);
+		}
+	}
+
+	// -----------------------------------------------------------------------------------
+}