avfmediaplayer_p.h

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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 AVFMEDIAPLAYER_H
#define AVFMEDIAPLAYER_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/qmediaplayer.h>
#include <QtMultimedia/qvideoframe.h>
#include <QtMultimedia/private/qplatformmediaplayer_p.h>
#include <QtCore/qbytearray.h>
#include <QtCore/qobject.h>
#include <QtCore/qresource.h>
#include <QtCore/qset.h>
#include <QtCore/qtimer.h>
#include <QtCore/qurl.h>
 
#import <AVFoundation/AVFoundation.h>
 
@class AVFMediaPlayerObserver;
Q_FORWARD_DECLARE_OBJC_CLASS(AVMediaSelectionGroup);
 
QT_BEGIN_NAMESPACE
 
class AVFMediaPlayer;
class AVFVideoRendererControl;
class AVFVideoSink;
 
class AVFMediaPlayer : public QObject, public QPlatformMediaPlayer
{
    Q_OBJECT
public:
    AVFMediaPlayer(QMediaPlayer *parent);
    ~AVFMediaPlayer() override;
 
    void setVideoSink(QVideoSink *sink) override;
    void setVideoOutput(AVFVideoRendererControl *output);
    AVAsset *currentAssetHandle();
 
    QUrl media() const override;
    QIODevice *mediaStream() const override;
    void setMedia(const QUrl &content, QIODevice *stream) override;
 
    qint64 position() const override;
    qint64 duration() const override;
 
    float bufferProgress() const override;
 
    QMediaTimeRange availablePlaybackRanges() const override;
 
    qreal playbackRate() const override;
 
    void setAudioOutput(QPlatformAudioOutput *output) override;
    QPlatformAudioOutput *m_audioOutput = nullptr;
 
    QMediaMetaData metaData() const override;
 
    static void videoOrientationForAssetTrack(AVAssetTrack *track,
                                       QtVideo::Rotation &angle,
                                       bool &mirrored);
 
    PitchCompensationAvailability pitchCompensationAvailability() const override;
    void setPitchCompensation(bool enabled) override;
    bool pitchCompensation() const override;
 
public Q_SLOTS:
    void setPlaybackRate(qreal rate) override;
    void nativeSizeChanged(QSize size);
 
    void setPosition(qint64 pos) override;
 
    void play() override;
    void pause() override;
    void stop() override;
 
    void setVolume(float volume);
    void setMuted(bool muted);
    void updateAudioOutputDevice();
 
    void processEOS();
    void processLoadStateChange(QMediaPlayer::PlaybackState newState);
    void processPositionChange();
    void processMediaLoadError(QMediaPlayer::Error errorCode);
 
    void seekCompleted();
 
    void processLoadStateChange();
    void processLoadStateFailure();
 
    void processBufferStateChange(int bufferProgress);
 
    void processDurationChange(qint64 duration);
 
    void streamReady();
    void streamDestroyed();
    void loadMediaStream();
    void updateTracks();
    void setActiveTrack(TrackType type, int index) override;
    int activeTrack(TrackType type) override;
    int trackCount(TrackType) override;
    QMediaMetaData trackMetaData(TrackType type, int trackNumber) override;
 
public:
    TrackTypeMap<QList<QMediaMetaData>> tracks;
    TrackTypeMap<QList<AVPlayerItemTrack *>> nativeTracks;
 
    // Called on the player thread once the legible options of the current item have loaded
    void subtitleOptionsLoaded(int generation, AVMediaSelectionGroup *group);
 
private:
    void applySubtitleSelection();
    void resetSubtitleGroup();
 
    void resetStream(QIODevice *stream = nullptr);
    void applyPitchCompensation(bool enabled);
    void resetBufferProgress();
 
    void orientationChanged(QtVideo::Rotation rotation, bool mirrored);
 
    AVFVideoRendererControl *m_videoOutput = nullptr;
    AVFVideoSink *m_videoSink = nullptr;
    QSize m_nativeSize;
 
    // Set while the legible options of the current item contain OS-generated subtitles
    AVMediaSelectionGroup *m_subtitleGroup = nullptr;
    int m_subtitleGroupGeneration = 0;
    int m_requestedSubtitleTrack = -1;
 
    QIODevice *m_mediaStream;
    QUrl m_resources;
    QMediaMetaData m_metaData;
 
    qreal m_rate;
    qint64 m_requestedPosition;
 
    qint64 m_duration;
    int m_bufferProgress;
    bool m_pitchCompensationEnabled{ false };
 
    AVFMediaPlayerObserver *m_observer;
 
    QTimer m_playbackTimer;
};
 
QT_END_NAMESPACE
 
#endif // AVFMEDIAPLAYER_H