| 1 | // Copyright (C) 2021 The Qt Company Ltd. |
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| 2 | // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only |
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| 3 | #ifndef QFFMPEGTIMECONTROLLER_P_H |
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| 4 | #define QFFMPEGTIMECONTROLLER_P_H |
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| 5 | |
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| 6 | // |
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| 7 | // W A R N I N G |
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| 8 | // ------------- |
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| 9 | // |
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| 10 | // This file is not part of the Qt API. It exists purely as an |
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| 11 | // implementation detail. This header file may change from version to |
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| 12 | // version without notice, or even be removed. |
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| 13 | // |
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| 14 | // We mean it. |
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| 15 | // |
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| 16 | |
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| 17 | #include "qglobal.h" |
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| 18 | #include <QtFFmpegMediaPluginImpl/private/qffmpegtime_p.h> |
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| 19 | |
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| 20 | #include <chrono> |
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| 21 | #include <optional> |
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| 22 | |
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| 23 | QT_BEGIN_NAMESPACE |
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| 24 | |
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| 25 | namespace QFFmpeg { |
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| 26 | |
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| 27 | class TimeController |
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| 28 | { |
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| 29 | public: |
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| 30 | using TimePoint = RealClock::time_point; |
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| 31 | using PlaybackRate = float; |
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| 32 | |
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| 33 | TimeController(); |
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| 34 | |
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| 35 | PlaybackRate playbackRate() const; |
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| 36 | |
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| 37 | void setPlaybackRate(PlaybackRate playbackRate); |
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| 38 | |
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| 39 | void sync(TrackPosition trackPos = TrackPosition(0)); |
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| 40 | |
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| 41 | void sync(TimePoint tp, TrackPosition pos); |
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| 42 | |
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| 43 | void syncSoft(TimePoint tp, TrackPosition pos, |
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| 44 | RealClock::duration fixingTime = std::chrono::seconds(4)); |
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| 45 | |
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| 46 | TrackPosition currentPosition(RealClock::duration offset = RealClock::duration{ 0 }) const; |
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| 47 | |
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| 48 | void setPaused(bool paused); |
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| 49 | |
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| 50 | TrackPosition positionFromTime(TimePoint tp, bool ignorePause = false) const; |
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| 51 | |
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| 52 | TimePoint timeFromPosition(TrackPosition pos, bool ignorePause = false) const; |
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| 53 | |
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| 54 | private: |
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| 55 | struct SoftSyncData |
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| 56 | { |
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| 57 | TimePoint srcTimePoint; |
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| 58 | TrackPosition srcPosition = 0; |
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| 59 | TimePoint dstTimePoint; |
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| 60 | TrackDuration srcPosOffest = 0; |
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| 61 | TrackPosition dstPosition = 0; |
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| 62 | PlaybackRate internalRate = 1; |
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| 63 | }; |
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| 64 | |
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| 65 | SoftSyncData makeSoftSyncData(const TimePoint &srcTp, const TrackPosition &srcPos, |
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| 66 | const TimePoint &dstTp) const; |
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| 67 | |
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| 68 | TrackPosition positionFromTimeInternal(const TimePoint &tp) const; |
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| 69 | |
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| 70 | TimePoint timeFromPositionInternal(const TrackPosition &pos) const; |
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| 71 | |
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| 72 | void scrollTimeTillNow(); |
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| 73 | |
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| 74 | static RealClock::duration toClockDuration(TrackDuration trackDuration, |
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| 75 | PlaybackRate rate = 1.f); |
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| 76 | |
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| 77 | static TrackDuration toTrackDuration(RealClock::duration clockDuration, PlaybackRate rate); |
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| 78 | |
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| 79 | private: |
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| 80 | bool m_paused = true; |
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| 81 | PlaybackRate m_playbackRate = 1; |
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| 82 | TrackPosition m_position = 0; |
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| 83 | TimePoint m_timePoint; |
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| 84 | std::optional<SoftSyncData> m_softSyncData; |
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| 85 | }; |
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| 86 | |
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| 87 | } // namespace QFFmpeg |
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| 88 | |
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| 89 | QT_END_NAMESPACE |
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| 90 | |
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| 91 | #endif // QFFMPEGTIMECONTROLLER_P_H |
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| 92 | |
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