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#include "portaudiocpp/Stream.hxx"
#include <cstddef>
#include "portaudiocpp/Exception.hxx"
#include "portaudiocpp/System.hxx"
namespace portaudio
{
// -----------------------------------------------------------------------------------
Stream::Stream() : stream_(NULL)
{
}
Stream::~Stream()
{
// (can't call close here,
// the derived class should atleast call
// close() in it's deconstructor)
}
// -----------------------------------------------------------------------------------
//////
/// Closes the Stream if it's open, else does nothing.
//////
void Stream::close()
{
if (isOpen() && System::exists())
{
PaError err = Pa_CloseStream(stream_);
stream_ = NULL;
if (err != paNoError)
throw PaException(err);
}
}
//////
/// Returns true if the Stream is open.
//////
bool Stream::isOpen() const
{
return (stream_ != NULL);
}
// -----------------------------------------------------------------------------------
void Stream::setStreamFinishedCallback(PaStreamFinishedCallback *callback)
{
PaError err = Pa_SetStreamFinishedCallback(stream_, callback);
if (err != paNoError)
throw PaException(err);
}
// -----------------------------------------------------------------------------------
void Stream::start()
{
PaError err = Pa_StartStream(stream_);
if (err != paNoError)
throw PaException(err);
}
void Stream::stop()
{
PaError err = Pa_StopStream(stream_);
if (err != paNoError)
throw PaException(err);
}
void Stream::abort()
{
PaError err = Pa_AbortStream(stream_);
if (err != paNoError)
throw PaException(err);
}
bool Stream::isStopped() const
{
PaError ret = Pa_IsStreamStopped(stream_);
if (ret < 0)
throw PaException(ret);
return (ret == 1);
}
bool Stream::isActive() const
{
PaError ret = Pa_IsStreamActive(stream_);
if (ret < 0)
throw PaException(ret);
return (ret == 1);
}
// -----------------------------------------------------------------------------------
//////
/// Returns the best known input latency for the Stream. This value may differ from the
/// suggested input latency set in the StreamParameters. Includes all sources of
/// latency known to PortAudio such as internal buffering, and Host API reported latency.
/// Doesn't include any estimates of unknown latency.
//////
PaTime Stream::inputLatency() const
{
const PaStreamInfo *info = Pa_GetStreamInfo(stream_);
if (info == NULL)
{
throw PaException(paInternalError);
return PaTime(0.0);
}
return info->inputLatency;
}
//////
/// Returns the best known output latency for the Stream. This value may differ from the
/// suggested output latency set in the StreamParameters. Includes all sources of
/// latency known to PortAudio such as internal buffering, and Host API reported latency.
/// Doesn't include any estimates of unknown latency.
//////
PaTime Stream::outputLatency() const
{
const PaStreamInfo *info = Pa_GetStreamInfo(stream_);
if (info == NULL)
{
throw PaException(paInternalError);
return PaTime(0.0);
}
return info->outputLatency;
}
//////
/// Returns the sample rate of the Stream. Usually this will be the
/// best known estimate of the used sample rate. For instance when opening a
/// Stream setting 44100.0 Hz in the StreamParameters, the actual sample
/// rate might be something like 44103.2 Hz (due to imperfections in the
/// sound card hardware).
//////
double Stream::sampleRate() const
{
const PaStreamInfo *info = Pa_GetStreamInfo(stream_);
if (info == NULL)
{
throw PaException(paInternalError);
return 0.0;
}
return info->sampleRate;
}
// -----------------------------------------------------------------------------------
PaTime Stream::time() const
{
return Pa_GetStreamTime(stream_);
}
// -----------------------------------------------------------------------------------
//////
/// Accessor (const) for PortAudio PaStream pointer, useful for interfacing with
/// PortAudio add-ons such as PortMixer for instance. Normally accessing this
/// pointer should not be needed as PortAudioCpp aims to provide all of PortAudio's
/// functionality.
//////
const PaStream *Stream::paStream() const
{
return stream_;
}
//////
/// Accessor (non-const) for PortAudio PaStream pointer, useful for interfacing with
/// PortAudio add-ons such as PortMixer for instance. Normally accessing this
/// pointer should not be needed as PortAudioCpp aims to provide all of PortAudio's
/// functionality.
//////
PaStream *Stream::paStream()
{
return stream_;
}
// -----------------------------------------------------------------------------------
} // namespace portaudio
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