WSJT-X/Audio/soundin.cpp

201 lines
5.4 KiB
C++

#include "soundin.h"
#include <cstdlib>
#include <cmath>
#include <QAudioDeviceInfo>
#include <QAudioFormat>
#include <QAudioInput>
#include <QSysInfo>
#include <QDebug>
#include "moc_soundin.cpp"
bool SoundInput::checkStream ()
{
bool result (false);
if (m_stream)
{
switch (m_stream->error ())
{
case QAudio::OpenError:
Q_EMIT error (tr ("An error opening the audio input device has occurred."));
break;
case QAudio::IOError:
Q_EMIT error (tr ("An error occurred during read from the audio input device."));
break;
// case QAudio::UnderrunError:
// Q_EMIT error (tr ("Audio data not being fed to the audio input device fast enough."));
// break;
case QAudio::FatalError:
Q_EMIT error (tr ("Non-recoverable error, audio input device not usable at this time."));
break;
case QAudio::UnderrunError: // TODO G4WJS: stop ignoring this
// when we find the cause on macOS
case QAudio::NoError:
result = true;
break;
}
}
return result;
}
void SoundInput::start(QAudioDeviceInfo const& device, int framesPerBuffer, AudioDevice * sink
, unsigned downSampleFactor, AudioDevice::Channel channel)
{
Q_ASSERT (sink);
stop ();
m_sink = sink;
QAudioFormat format (device.preferredFormat());
// qDebug () << "Preferred audio input format:" << format;
format.setChannelCount (AudioDevice::Mono == channel ? 1 : 2);
format.setCodec ("audio/pcm");
format.setSampleRate (12000 * downSampleFactor);
format.setSampleType (QAudioFormat::SignedInt);
format.setSampleSize (16);
format.setByteOrder (QAudioFormat::Endian (QSysInfo::ByteOrder));
if (!format.isValid ())
{
Q_EMIT error (tr ("Requested input audio format is not valid."));
return;
}
else if (!device.isFormatSupported (format))
{
// qDebug () << "Nearest supported audio format:" << device.nearestFormat (format);
Q_EMIT error (tr ("Requested input audio format is not supported on device."));
return;
}
// qDebug () << "Selected audio input format:" << format;
m_stream.reset (new QAudioInput {device, format});
if (!checkStream ())
{
return;
}
connect (m_stream.data(), &QAudioInput::stateChanged, this, &SoundInput::handleStateChanged);
connect (m_stream.data(), &QAudioInput::notify, [this] () {checkStream ();});
//qDebug () << "SoundIn default buffer size (bytes):" << m_stream->bufferSize () << "period size:" << m_stream->periodSize ();
// the Windows MME version of QAudioInput uses 1/5 of the buffer
// size for period size other platforms seem to optimize themselves
#if defined (Q_OS_WIN)
m_stream->setBufferSize (m_stream->format ().bytesForFrames (framesPerBuffer * 5));
#else
Q_UNUSED (framesPerBuffer);
#endif
if (m_sink->initialize (QIODevice::WriteOnly, channel))
{
m_stream->start (sink);
checkStream ();
cummulative_lost_usec_ = -1;
//qDebug () << "SoundIn selected buffer size (bytes):" << m_stream->bufferSize () << "peirod size:" << m_stream->periodSize ();
}
else
{
Q_EMIT error (tr ("Failed to initialize audio sink device"));
}
}
void SoundInput::suspend ()
{
if (m_stream)
{
m_stream->suspend ();
checkStream ();
}
}
void SoundInput::resume ()
{
// qDebug() << "Resume" << fmod(0.001*QDateTime::currentMSecsSinceEpoch(),6.0);
if (m_sink)
{
m_sink->reset ();
}
if (m_stream)
{
m_stream->resume ();
checkStream ();
}
}
void SoundInput::handleStateChanged (QAudio::State newState)
{
switch (newState)
{
case QAudio::IdleState:
Q_EMIT status (tr ("Idle"));
break;
case QAudio::ActiveState:
reset (false);
Q_EMIT status (tr ("Receiving"));
break;
case QAudio::SuspendedState:
Q_EMIT status (tr ("Suspended"));
break;
#if QT_VERSION >= QT_VERSION_CHECK (5, 10, 0)
case QAudio::InterruptedState:
Q_EMIT status (tr ("Interrupted"));
break;
#endif
case QAudio::StoppedState:
if (!checkStream ())
{
Q_EMIT status (tr ("Error"));
}
else
{
Q_EMIT status (tr ("Stopped"));
}
break;
}
}
void SoundInput::reset (bool report_dropped_frames)
{
if (m_stream)
{
auto elapsed_usecs = m_stream->elapsedUSecs ();
while (std::abs (elapsed_usecs - m_stream->processedUSecs ())
> 24 * 60 * 60 * 500000ll) // half day
{
// QAudioInput::elapsedUSecs() wraps after 24 hours
elapsed_usecs += 24 * 60 * 60 * 1000000ll;
}
// don't report first time as we don't yet known latency
if (cummulative_lost_usec_ != std::numeric_limits<qint64>::min () && report_dropped_frames)
{
auto lost_usec = elapsed_usecs - m_stream->processedUSecs () - cummulative_lost_usec_;
Q_EMIT dropped_frames (m_stream->format ().framesForDuration (lost_usec), lost_usec);
//qDebug () << "SoundInput::reset: frames dropped:" << m_stream->format ().framesForDuration (lost_usec) << "sec:" << lost_usec / 1.e6;
}
cummulative_lost_usec_ = elapsed_usecs - m_stream->processedUSecs ();
}
}
void SoundInput::stop()
{
if (m_stream)
{
m_stream->stop ();
}
m_stream.reset ();
}
SoundInput::~SoundInput ()
{
stop ();
}