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#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 ¶meters, CallbackFunPtr funPtr, void *userData) : adapterData_(funPtr, userData)
{
open(parameters);
}
FunCallbackStream::~FunCallbackStream()
{
try
{
close();
}
catch (...)
{
// ignore all errors
}
}
void FunCallbackStream::open(const StreamParameters ¶meters, CallbackFunPtr funPtr, void *userData)
{
adapterData_.init(funPtr, userData);
open(parameters);
}
void FunCallbackStream::open(const StreamParameters ¶meters)
{
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);
}
}
// -----------------------------------------------------------------------------------
}
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