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