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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
#ifndef QAUDIOOUTPUTGSTREAMER_H
#define QAUDIOOUTPUTGSTREAMER_H
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists purely as an
// implementation detail. This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//
#include <QtCore/qfile.h>
#include <QtCore/qtimer.h>
#include <QtCore/qstring.h>
#include <QtCore/qstringlist.h>
#include <QtCore/qelapsedtimer.h>
#include <QtCore/qiodevice.h>
#include <QtCore/private/qringbuffer_p.h>
#include "qaudio.h"
#include "qaudiodevice.h"
#include <private/qaudiosystem_p.h>
#include <private/qmultimediautils_p.h>
#include <qgst_p.h>
#include <qgstpipeline_p.h>
QT_BEGIN_NAMESPACE
class QGstAppSrc;
class QGStreamerAudioSink
: public QPlatformAudioSink,
public QGstreamerBusMessageFilter
{
friend class GStreamerOutputPrivate;
Q_OBJECT
public:
static QMaybe<QPlatformAudioSink *> create(const QAudioDevice &device);
~QGStreamerAudioSink();
void start(QIODevice *device) override;
QIODevice *start() override;
void stop() override;
void reset() override;
void suspend() override;
void resume() override;
qsizetype bytesFree() const override;
void setBufferSize(qsizetype value) override;
qsizetype bufferSize() const override;
qint64 processedUSecs() const override;
QAudio::Error error() const override;
QAudio::State state() const override;
void setFormat(const QAudioFormat &format) override;
QAudioFormat format() const override;
void setVolume(qreal volume) override;
qreal volume() const override;
private Q_SLOTS:
void bytesProcessedByAppSrc(int bytes);
void needData();
private:
QGStreamerAudioSink(const QAudioDevice &device, QGstAppSrc *appsrc, QGstElement audioconvert,
QGstElement volume);
void setState(QAudio::State state);
void setError(QAudio::Error error);
bool processBusMessage(const QGstreamerMessage &message) override;
bool open();
void close();
qint64 write(const char *data, qint64 len);
private:
QByteArray m_device;
QAudioFormat m_format;
QAudio::Error m_errorState = QAudio::NoError;
QAudio::State m_deviceState = QAudio::StoppedState;
bool m_pullMode = true;
bool m_opened = false;
QIODevice *m_audioSource = nullptr;
QTimer m_periodTimer;
int m_bufferSize = 0;
qint64 m_bytesProcessed = 0;
QElapsedTimer m_timeStamp;
qreal m_volume = 1.;
QByteArray pushData;
QGstPipeline gstPipeline;
QGstElement gstOutput;
QGstElement gstVolume;
QGstElement gstAppSrc;
QGstAppSrc *m_appSrc = nullptr;
};
class GStreamerOutputPrivate : public QIODevice
{
friend class QGStreamerAudioSink;
Q_OBJECT
public:
GStreamerOutputPrivate(QGStreamerAudioSink *audio);
virtual ~GStreamerOutputPrivate() {}
protected:
qint64 readData(char *data, qint64 len) override;
qint64 writeData(const char *data, qint64 len) override;
private:
QGStreamerAudioSink *m_audioDevice;
};
QT_END_NAMESPACE
#endif
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