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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#include <qgstreameraudiooutput_p.h>
#include <qgstreameraudiodevice_p.h>
#include <qaudiodevice.h>
#include <qaudiooutput.h>
#include <QtCore/qloggingcategory.h>
#include <utility>
static Q_LOGGING_CATEGORY(qLcMediaAudioOutput, "qt.multimedia.audiooutput")
QT_BEGIN_NAMESPACE
QMaybe<QPlatformAudioOutput *> QGstreamerAudioOutput::create(QAudioOutput *parent)
{
QGstElement audioconvert = QGstElement::createFromFactory("audioconvert", "audioConvert");
if (!audioconvert)
return errorMessageCannotFindElement("audioconvert");
QGstElement audioresample = QGstElement::createFromFactory("audioresample", "audioResample");
if (!audioresample)
return errorMessageCannotFindElement("audioresample");
QGstElement volume = QGstElement::createFromFactory("volume", "volume");
if (!volume)
return errorMessageCannotFindElement("volume");
QGstElement autoaudiosink = QGstElement::createFromFactory("autoaudiosink", "autoAudioSink");
if (!autoaudiosink)
return errorMessageCannotFindElement("autoaudiosink");
return new QGstreamerAudioOutput(audioconvert, audioresample, volume, autoaudiosink, parent);
}
QGstreamerAudioOutput::QGstreamerAudioOutput(QGstElement audioconvert, QGstElement audioresample,
QGstElement volume, QGstElement autoaudiosink,
QAudioOutput *parent)
: QObject(parent),
QPlatformAudioOutput(parent),
gstAudioOutput(QGstBin::create("audioOutput")),
audioConvert(std::move(audioconvert)),
audioResample(std::move(audioresample)),
audioVolume(std::move(volume)),
audioSink(std::move(autoaudiosink))
{
audioQueue = QGstElement::createFromFactory("queue", "audioQueue");
gstAudioOutput.add(audioQueue, audioConvert, audioResample, audioVolume, audioSink);
qLinkGstElements(audioQueue, audioConvert, audioResample, audioVolume, audioSink);
gstAudioOutput.addGhostPad(audioQueue, "sink");
}
QGstreamerAudioOutput::~QGstreamerAudioOutput()
{
gstAudioOutput.setStateSync(GST_STATE_NULL);
}
void QGstreamerAudioOutput::setVolume(float volume)
{
audioVolume.set("volume", volume);
}
void QGstreamerAudioOutput::setMuted(bool muted)
{
audioVolume.set("mute", muted);
}
void QGstreamerAudioOutput::setPipeline(const QGstPipeline &pipeline)
{
gstPipeline = pipeline;
}
void QGstreamerAudioOutput::setAudioDevice(const QAudioDevice &info)
{
if (info == m_audioOutput)
return;
qCDebug(qLcMediaAudioOutput) << "setAudioOutput" << info.description() << info.isNull();
m_audioOutput = info;
QGstElement newSink;
if constexpr (QT_CONFIG(pulseaudio)) {
auto id = m_audioOutput.id();
newSink = QGstElement::createFromFactory("pulsesink", "audiosink");
if (!newSink.isNull())
newSink.set("device", id.constData());
else
qCWarning(qLcMediaAudioOutput) << "Invalid audio device";
} else {
auto *deviceInfo = static_cast<const QGStreamerAudioDeviceInfo *>(m_audioOutput.handle());
if (deviceInfo && deviceInfo->gstDevice) {
newSink = QGstElement{
gst_device_create_element(deviceInfo->gstDevice.get(), "audiosink"),
QGstElement::HasRef,
};
} else {
qCWarning(qLcMediaAudioOutput) << "Invalid audio device";
}
}
if (newSink.isNull()) {
qCWarning(qLcMediaAudioOutput) << "Failed to create a gst element for the audio device, using a default audio sink";
newSink = QGstElement::createFromFactory("autoaudiosink", "audiosink");
}
audioVolume.staticPad("src").doInIdleProbe([&]() {
qUnlinkGstElements(audioVolume, audioSink);
gstAudioOutput.remove(audioSink);
gstAudioOutput.add(newSink);
newSink.syncStateWithParent();
qLinkGstElements(audioVolume, newSink);
});
audioSink.setStateSync(GST_STATE_NULL);
audioSink = newSink;
}
QT_END_NAMESPACE
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