qgstpipeline_p.h - mozsearch

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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 QGstreamerBusMessageFilter;

struct QGstPipelinePrivate;

class QGstPipeline : public QGstBin

    static constexpr auto defaultQueryTimeout = std::chrono::seconds{ 5 };

public:

    QGstPipeline() = default;

    QGstPipeline(const QGstPipeline &) = default;

    QGstPipeline(QGstPipeline &&) = default;

    QGstPipeline &operator=(const QGstPipeline &) = default;

    QGstPipeline &operator=(QGstPipeline &&) noexcept = default;

    QGstPipeline(GstPipeline *, RefMode mode);

    ~QGstPipeline();

    static QGstPipeline createFromFactory(const char *factory, const char *name);

    static QGstPipeline create(const char *name);

    void installMessageFilter(QGstreamerBusMessageFilter *filter);

    void removeMessageFilter(QGstreamerBusMessageFilter *filter);

    GstStateChangeReturn setState(GstState state);

    GstPipeline *pipeline() const { return GST_PIPELINE_CAST(get()); }

    bool processNextPendingMessage(GstMessageType = GST_MESSAGE_ANY,

                                   std::chrono::nanoseconds timeout = {});

    bool processNextPendingMessage(std::chrono::nanoseconds timeout);

    void flush();

    void setPlaybackRate(double rate, bool forceFlushingSeek = false);

    double playbackRate() const;

    void applyPlaybackRate(bool forceFlushingSeek = false);

    void setPosition(std::chrono::nanoseconds pos, bool flush = true);

    std::chrono::nanoseconds position() const;

    std::chrono::milliseconds positionInMs() const;

    void setPositionAndRate(std::chrono::nanoseconds pos, double rate);

    std::optional<std::chrono::nanoseconds>

    queryPosition(std::chrono::nanoseconds timeout = defaultQueryTimeout) const;

    std::optional<std::chrono::nanoseconds>

    queryDuration(std::chrono::nanoseconds timeout = defaultQueryTimeout) const;

    std::optional<std::pair<std::chrono::nanoseconds, std::chrono::nanoseconds>>

    queryPositionAndDuration(std::chrono::nanoseconds timeout = defaultQueryTimeout) const;

    void seekToEndWithEOS();

private:

    // installs QGstPipelinePrivate as "pipeline-private" gobject property

    static QGstPipeline adopt(GstPipeline *);

    void seek(std::chrono::nanoseconds pos, double rate, bool flush);

    void seek(std::chrono::nanoseconds pos, bool flush);

    QGstPipelinePrivate *getPrivate() const;

};

QT_END_NAMESPACE

#endif