1// Copyright (C) 2021 The Qt Company Ltd.
2// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
3
4#ifndef QFFMPEGMEDIADATAHOLDER_P_H
5#define QFFMPEGMEDIADATAHOLDER_P_H
6
7//
8// W A R N I N G
9// -------------
10//
11// This file is not part of the Qt API. It exists purely as an
12// implementation detail. This header file may change from version to
13// version without notice, or even be removed.
14//
15// We mean it.
16//
17
18#include "qmediametadata.h"
19#include <QtFFmpegMediaPluginImpl/private/qffmpegtime_p.h>
20#include <QtMultimedia/private/qplatformmediaplayer_p.h>
21#include <QtFFmpegMediaPluginImpl/private/qffmpeg_p.h>
22#include "qvideoframe.h"
23#include <QtMultimedia/private/qmultimediautils_p.h>
24
25#include <array>
26#include <optional>
27
28QT_BEGIN_NAMESPACE
29
30namespace QFFmpeg {
31
32struct ICancelToken
33{
34 virtual ~ICancelToken() = default;
35 virtual bool isCancelled() const = 0;
36};
37
38using AVFormatContextUPtr = std::unique_ptr<AVFormatContext, AVDeleter<decltype(&avformat_close_input), &avformat_close_input>>;
39
40class MediaDataHolder
41{
42public:
43 struct StreamInfo
44 {
45 int avStreamIndex = -1;
46 bool isDefault = false;
47 QMediaMetaData metaData;
48 };
49
50 struct ContextError
51 {
52 int code = 0;
53 QString description;
54 };
55
56 using StreamsMap = std::array<QList<StreamInfo>, QPlatformMediaPlayer::NTrackTypes>;
57 using StreamIndexes = std::array<int, QPlatformMediaPlayer::NTrackTypes>;
58
59 MediaDataHolder() = default;
60 MediaDataHolder(AVFormatContextUPtr context, const std::shared_ptr<ICancelToken> &cancelToken);
61
62 static QPlatformMediaPlayer::TrackType trackTypeFromMediaType(int mediaType);
63
64 int activeTrack(QPlatformMediaPlayer::TrackType type) const;
65
66 const QList<StreamInfo> &streamInfo(QPlatformMediaPlayer::TrackType trackType) const;
67
68 TrackDuration duration() const { return m_duration; }
69
70 const QMediaMetaData &metaData() const { return m_metaData; }
71
72 bool isSeekable() const { return m_isSeekable; }
73
74 VideoTransformation transformation() const;
75
76 AVFormatContext *avContext();
77
78 int currentStreamIndex(QPlatformMediaPlayer::TrackType trackType) const;
79
80 using Maybe = QMaybe<QSharedPointer<MediaDataHolder>, ContextError>;
81 static Maybe create(const QUrl &url, QIODevice *stream,
82 const std::shared_ptr<ICancelToken> &cancelToken);
83
84 bool setActiveTrack(QPlatformMediaPlayer::TrackType type, int streamNumber);
85
86private:
87 void updateMetaData();
88
89 std::shared_ptr<ICancelToken> m_cancelToken; // NOTE: Cancel token may be accessed by
90 // AVFormatContext during destruction and
91 // must outlive the context object
92 AVFormatContextUPtr m_context;
93
94 bool m_isSeekable = false;
95
96 StreamIndexes m_currentAVStreamIndex = { -1, -1, -1 };
97 StreamsMap m_streamMap;
98 StreamIndexes m_requestedStreams = { -1, -1, -1 };
99 TrackDuration m_duration = TrackDuration(0);
100 QMediaMetaData m_metaData;
101 std::optional<QImage> m_cachedThumbnail;
102};
103
104} // namespace QFFmpeg
105
106QT_END_NAMESPACE
107
108#endif // QFFMPEGMEDIADATAHOLDER_P_H
109

source code of qtmultimedia/src/plugins/multimedia/ffmpeg/playbackengine/qffmpegmediadataholder_p.h