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 QFFMPEGRENDERER_P_H |
4 | #define QFFMPEGRENDERER_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 <QtFFmpegMediaPluginImpl/private/qffmpegplaybackengineobject_p.h> |
18 | #include <QtFFmpegMediaPluginImpl/private/qffmpegtimecontroller_p.h> |
19 | #include <QtFFmpegMediaPluginImpl/private/qffmpegframe_p.h> |
20 | |
21 | #include <QtCore/qpointer.h> |
22 | #include <QtCore/qqueue.h> |
23 | |
24 | #include <chrono> |
25 | |
26 | QT_BEGIN_NAMESPACE |
27 | |
28 | namespace QFFmpeg { |
29 | |
30 | class Renderer : public PlaybackEngineObject |
31 | { |
32 | Q_OBJECT |
33 | public: |
34 | using TimePoint = RealClock::time_point; |
35 | |
36 | Renderer(const TimeController &tc); |
37 | |
38 | void syncSoft(TimePoint tp, TrackPosition trackPos); |
39 | |
40 | TrackPosition seekPosition() const; |
41 | |
42 | TrackPosition lastPosition() const; |
43 | |
44 | void setPlaybackRate(float rate); |
45 | |
46 | void doForceStep(); |
47 | |
48 | bool isStepForced() const; |
49 | |
50 | void start(const TimeController &tc); |
51 | |
52 | public slots: |
53 | |
54 | void onFinalFrameReceived(); |
55 | |
56 | void render(Frame); |
57 | |
58 | signals: |
59 | void frameProcessed(Frame); |
60 | |
61 | void synchronized(Id id, TimePoint tp, TrackPosition pos); |
62 | |
63 | void forceStepDone(); |
64 | |
65 | void loopChanged(Id id, TrackPosition offset, int index); |
66 | |
67 | protected: |
68 | bool setForceStepDone(); |
69 | |
70 | void onPauseChanged() override; |
71 | |
72 | bool canDoNextStep() const override; |
73 | |
74 | std::chrono::milliseconds timerInterval() const override; |
75 | |
76 | virtual void onPlaybackRateChanged() { } |
77 | |
78 | struct RenderingResult |
79 | { |
80 | bool done = true; |
81 | std::chrono::microseconds recheckInterval = std::chrono::microseconds(0); |
82 | }; |
83 | |
84 | virtual RenderingResult renderInternal(Frame frame) = 0; |
85 | |
86 | float playbackRate() const; |
87 | |
88 | std::chrono::microseconds frameDelay(const Frame &frame, |
89 | TimePoint timePoint = RealClock::now()) const; |
90 | |
91 | void changeRendererTime(std::chrono::microseconds offset); |
92 | |
93 | template<typename Output, typename ChangeHandler> |
94 | void setOutputInternal(QPointer<Output> &actual, Output *desired, ChangeHandler &&changeHandler) |
95 | { |
96 | const auto connectionType = |
97 | thread()->isCurrentThread() ? Qt::AutoConnection : Qt::BlockingQueuedConnection; |
98 | auto doer = [desired, changeHandler, &actual]() { |
99 | const auto prev = std::exchange(actual, desired); |
100 | if (prev != desired) |
101 | changeHandler(prev); |
102 | }; |
103 | QMetaObject::invokeMethod(this, doer, connectionType); |
104 | } |
105 | |
106 | private: |
107 | void doNextStep() override; |
108 | |
109 | private: |
110 | TimeController m_timeController; |
111 | TrackPosition m_lastFrameEnd = TrackPosition(0); |
112 | QAtomicInteger<qint64> m_lastPosition = 0; |
113 | QAtomicInteger<qint64> m_seekPos = 0; |
114 | |
115 | int m_loopIndex = 0; |
116 | QQueue<Frame> m_frames; |
117 | |
118 | QAtomicInteger<bool> m_isStepForced = false; |
119 | bool m_started = false; |
120 | std::optional<TimePoint> m_explicitNextFrameTime; |
121 | }; |
122 | |
123 | } // namespace QFFmpeg |
124 | |
125 | QT_END_NAMESPACE |
126 | |
127 | #endif // QFFMPEGRENDERER_P_H |
128 | |