| 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 | #include "playbackengine/qffmpegplaybackengineobject_p.h" |
| 5 | |
| 6 | #include "qtimer.h" |
| 7 | #include "qdebug.h" |
| 8 | |
| 9 | QT_BEGIN_NAMESPACE |
| 10 | |
| 11 | namespace QFFmpeg { |
| 12 | |
| 13 | static QAtomicInteger<PlaybackEngineObject::Id> PersistentId = 0; |
| 14 | |
| 15 | PlaybackEngineObject::PlaybackEngineObject() : m_id(PersistentId.fetchAndAddRelaxed(valueToAdd: 1)) { } |
| 16 | |
| 17 | PlaybackEngineObject::~PlaybackEngineObject() |
| 18 | { |
| 19 | if (!thread()->isCurrentThread()) |
| 20 | qWarning() << "The playback engine object is being removed in an unexpected thread"; |
| 21 | } |
| 22 | |
| 23 | bool PlaybackEngineObject::isPaused() const |
| 24 | { |
| 25 | return m_paused; |
| 26 | } |
| 27 | |
| 28 | void PlaybackEngineObject::setAtEnd(bool isAtEnd) |
| 29 | { |
| 30 | if (m_atEnd.testAndSetRelease(expectedValue: !isAtEnd, newValue: isAtEnd) && isAtEnd) |
| 31 | emit atEnd(); |
| 32 | } |
| 33 | |
| 34 | bool PlaybackEngineObject::isAtEnd() const |
| 35 | { |
| 36 | return m_atEnd; |
| 37 | } |
| 38 | |
| 39 | PlaybackEngineObject::Id PlaybackEngineObject::id() const |
| 40 | { |
| 41 | return m_id; |
| 42 | } |
| 43 | |
| 44 | void PlaybackEngineObject::setPaused(bool isPaused) |
| 45 | { |
| 46 | if (m_paused.testAndSetRelease(expectedValue: !isPaused, newValue: isPaused)) |
| 47 | QMetaObject::invokeMethod(object: this, function: &PlaybackEngineObject::onPauseChanged); |
| 48 | } |
| 49 | |
| 50 | void PlaybackEngineObject::kill() |
| 51 | { |
| 52 | m_deleting.storeRelease(newValue: true); |
| 53 | |
| 54 | disconnect(); |
| 55 | deleteLater(); |
| 56 | } |
| 57 | |
| 58 | bool PlaybackEngineObject::canDoNextStep() const |
| 59 | { |
| 60 | return !m_paused; |
| 61 | } |
| 62 | |
| 63 | QTimer &PlaybackEngineObject::timer() |
| 64 | { |
| 65 | if (!m_timer) { |
| 66 | m_timer = std::make_unique<QTimer>(); |
| 67 | m_timer->setTimerType(Qt::PreciseTimer); |
| 68 | m_timer->setSingleShot(true); |
| 69 | connect(sender: m_timer.get(), signal: &QTimer::timeout, context: this, slot: &PlaybackEngineObject::onTimeout); |
| 70 | } |
| 71 | |
| 72 | return *m_timer; |
| 73 | } |
| 74 | |
| 75 | void PlaybackEngineObject::onTimeout() |
| 76 | { |
| 77 | if (!m_deleting && canDoNextStep()) |
| 78 | doNextStep(); |
| 79 | } |
| 80 | |
| 81 | std::chrono::milliseconds PlaybackEngineObject::timerInterval() const |
| 82 | { |
| 83 | using namespace std::chrono_literals; |
| 84 | return 0ms; |
| 85 | } |
| 86 | |
| 87 | void PlaybackEngineObject::onPauseChanged() |
| 88 | { |
| 89 | scheduleNextStep(); |
| 90 | } |
| 91 | |
| 92 | void PlaybackEngineObject::scheduleNextStep(bool allowDoImmediatelly) |
| 93 | { |
| 94 | using std::chrono::milliseconds; |
| 95 | using namespace std::chrono_literals; |
| 96 | |
| 97 | if (!m_deleting && canDoNextStep()) { |
| 98 | const milliseconds interval = timerInterval(); |
| 99 | if (interval == 0ms && allowDoImmediatelly) { |
| 100 | timer().stop(); |
| 101 | doNextStep(); |
| 102 | } else { |
| 103 | timer().start(msec: static_cast<int>(interval.count())); |
| 104 | } |
| 105 | } else { |
| 106 | timer().stop(); |
| 107 | } |
| 108 | } |
| 109 | } // namespace QFFmpeg |
| 110 | |
| 111 | QT_END_NAMESPACE |
| 112 | |
| 113 | #include "moc_qffmpegplaybackengineobject_p.cpp" |
| 114 |