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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 qgstpipeline_p_H
#define qgstpipeline_p_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 <QtMultimedia/private/qtmultimediaglobal_p.h>
#include <QtCore/qobject.h>
#include "qgst_p.h"
QT_BEGIN_NAMESPACE
class QGstreamerMessage;
class QGstreamerSyncMessageFilter {
public:
//returns true if message was processed and should be dropped, false otherwise
virtual bool processSyncMessage(const QGstreamerMessage &message) = 0;
};
class QGstreamerBusMessageFilter {
public:
//returns true if message was processed and should be dropped, false otherwise
virtual bool processBusMessage(const QGstreamerMessage &message) = 0;
};
class QGstPipelinePrivate;
class QGstPipeline : public QGstBin
{
public:
constexpr QGstPipeline() = default;
QGstPipeline(const QGstPipeline &) = default;
QGstPipeline(QGstPipeline &&) = default;
QGstPipeline &operator=(const QGstPipeline &) = default;
QGstPipeline &operator=(QGstPipeline &&) noexcept = default;
QGstPipeline(GstPipeline *, RefMode mode);
~QGstPipeline();
// installs QGstPipelinePrivate as "pipeline-private" gobject property
static QGstPipeline create(const char *name);
static QGstPipeline adopt(GstPipeline *);
// This is needed to help us avoid sending QVideoFrames or audio buffers to the
// application while we're prerolling the pipeline.
// QMediaPlayer is still in a stopped state, while we put the gstreamer pipeline into a
// Paused state so that we can get the required metadata of the stream and also have a fast
// transition to play.
bool inStoppedState() const;
void setInStoppedState(bool stopped);
void setFlushOnConfigChanges(bool flush);
void installMessageFilter(QGstreamerSyncMessageFilter *filter);
void removeMessageFilter(QGstreamerSyncMessageFilter *filter);
void installMessageFilter(QGstreamerBusMessageFilter *filter);
void removeMessageFilter(QGstreamerBusMessageFilter *filter);
GstStateChangeReturn setState(GstState state);
GstPipeline *pipeline() const { return GST_PIPELINE_CAST(get()); }
void processMessages(GstMessageType = GST_MESSAGE_ANY);
void dumpGraph(const char *fileName);
template <typename Functor>
void modifyPipelineWhileNotRunning(Functor &&fn)
{
beginConfig();
fn();
endConfig();
}
template <typename Functor>
static void modifyPipelineWhileNotRunning(QGstPipeline &&pipeline, Functor &&fn)
{
if (pipeline)
pipeline.modifyPipelineWhileNotRunning(fn);
else
fn();
}
void flush();
bool seek(qint64 pos, double rate);
bool setPlaybackRate(double rate, bool applyToPipeline = true);
double playbackRate() const;
bool setPosition(qint64 pos);
qint64 position() const;
qint64 duration() const;
private:
QGstPipelinePrivate *getPrivate() const;
void beginConfig();
void endConfig();
};
QT_END_NAMESPACE
#endif
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