qffmpegcodeccontext_p.h

Go to the documentation of this file.

// Copyright (C) 2021 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 QFFMPEGCODECCONTEXT_P_H
#define QFFMPEGCODECCONTEXT_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 <QtFFmpegMediaPluginImpl/private/qffmpeg_p.h>
#include <QtFFmpegMediaPluginImpl/private/qffmpeghwaccel_p.h>
#include <QtFFmpegMediaPluginImpl/private/qffmpegtime_p.h>
 
#include <QtCore/qshareddata.h>
#include <QtCore/private/qexpected_p.h>
 
QT_BEGIN_NAMESPACE
 
class QPlaybackOptions;
 
namespace QFFmpeg {
 
class CodecContext
{
    struct Data : QSharedData
    {
        Data(AVCodecContextUPtr context, AVStream *avStream, AVFormatContext *formatContext,
             std::unique_ptr<QFFmpeg::HWAccel> hwAccel);
        AVCodecContextUPtr context;
        AVStream *stream = nullptr;
        AVFormatContext *formatContext = nullptr;
        AVRational pixelAspectRatio = { 0, 1 };
        std::unique_ptr<QFFmpeg::HWAccel> hwAccel;
    };
 
public:
    static q23::expected<CodecContext, QString> create(AVStream *stream, AVFormatContext *formatContext,
                                       const QPlaybackOptions &options);
 
    AVRational pixelAspectRatio(AVFrame *frame) const;
 
    AVCodecContext *context() const { return d->context.get(); }
    AVStream *stream() const { return d->stream; }
    uint streamIndex() const { return d->stream->index; }
    HWAccel *hwAccel() const { return d->hwAccel.get(); }
    TrackDuration toTrackDuration(AVStreamDuration duration) const
    {
        return QFFmpeg::toTrackDuration(duration, d->stream);
    }
 
    TrackPosition toTrackPosition(AVStreamPosition streamPosition) const
    {
        return QFFmpeg::toTrackPosition(streamPosition, d->stream, d->formatContext);
    }
 
private:
    enum VideoCodecCreationPolicy {
        Hw,
        Sw,
    };
 
    static q23::expected<CodecContext, QString> create(AVStream *stream, AVFormatContext *formatContext,
                                       const QPlaybackOptions &playbackOptions,
                                       VideoCodecCreationPolicy videoCodecPolicy);
    CodecContext(Data *data) : d(data) { }
    QExplicitlySharedDataPointer<Data> d;
};
 
} // namespace QFFmpeg
 
QT_END_NAMESPACE
 
#endif // QFFMPEGCODECCONTEXT_P_H