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// Copyright (C) 2021 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#include "playbackengine/qffmpegrenderer_p.h"
#include <qloggingcategory.h>
QT_BEGIN_NAMESPACE
namespace QFFmpeg {
static Q_LOGGING_CATEGORY(qLcRenderer, "qt.multimedia.ffmpeg.renderer");
Renderer::Renderer(const TimeController &tc, const std::chrono::microseconds &seekPosTimeOffset)
: m_timeController(tc),
m_lastFrameEnd(tc.currentPosition()),
m_lastPosition(m_lastFrameEnd),
m_seekPos(tc.currentPosition(-seekPosTimeOffset))
{
}
void Renderer::syncSoft(TimePoint tp, qint64 trackTime)
{
QMetaObject::invokeMethod(this, [this, tp, trackTime]() {
m_timeController.syncSoft(tp, trackTime);
scheduleNextStep(true);
});
}
qint64 Renderer::seekPosition() const
{
return m_seekPos;
}
qint64 Renderer::lastPosition() const
{
return m_lastPosition;
}
void Renderer::setPlaybackRate(float rate)
{
QMetaObject::invokeMethod(this, [this, rate]() {
m_timeController.setPlaybackRate(rate);
onPlaybackRateChanged();
scheduleNextStep();
});
}
void Renderer::doForceStep()
{
if (m_isStepForced.testAndSetOrdered(false, true))
QMetaObject::invokeMethod(this, [this]() {
// maybe set m_forceStepMaxPos
if (isAtEnd()) {
setForceStepDone();
}
else {
m_explicitNextFrameTime = Clock::now();
scheduleNextStep();
}
});
}
bool Renderer::isStepForced() const
{
return m_isStepForced;
}
void Renderer::setInitialPosition(TimePoint tp, qint64 trackPos)
{
QMetaObject::invokeMethod(this, [this, tp, trackPos]() {
Q_ASSERT(m_loopIndex == 0);
Q_ASSERT(m_frames.empty());
m_loopIndex = 0;
m_lastPosition.storeRelease(trackPos);
m_seekPos.storeRelease(trackPos);
m_timeController.sync(tp, trackPos);
});
}
void Renderer::onFinalFrameReceived()
{
render({});
}
void Renderer::render(Frame frame)
{
const auto isFrameOutdated = frame.isValid() && frame.absoluteEnd() < seekPosition();
if (isFrameOutdated) {
qCDebug(qLcRenderer) << "frame outdated! absEnd:" << frame.absoluteEnd() << "absPts"
<< frame.absolutePts() << "seekPos:" << seekPosition();
emit frameProcessed(frame);
return;
}
m_frames.enqueue(frame);
if (m_frames.size() == 1)
scheduleNextStep();
}
void Renderer::onPauseChanged()
{
m_timeController.setPaused(isPaused());
PlaybackEngineObject::onPauseChanged();
}
bool Renderer::canDoNextStep() const
{
return !m_frames.empty() && (m_isStepForced || PlaybackEngineObject::canDoNextStep());
}
float Renderer::playbackRate() const
{
return m_timeController.playbackRate();
}
int Renderer::timerInterval() const
{
if (m_frames.empty())
return 0;
auto calculateInterval = [](const TimePoint &nextTime) {
using namespace std::chrono;
const auto delay = nextTime - Clock::now();
return std::max(0, static_cast<int>(duration_cast<milliseconds>(delay).count()));
};
if (m_explicitNextFrameTime)
return calculateInterval(*m_explicitNextFrameTime);
if (m_frames.front().isValid())
return calculateInterval(m_timeController.timeFromPosition(m_frames.front().absolutePts()));
if (m_lastFrameEnd > 0)
return calculateInterval(m_timeController.timeFromPosition(m_lastFrameEnd));
return 0;
}
bool Renderer::setForceStepDone()
{
if (!m_isStepForced.testAndSetOrdered(true, false))
return false;
m_explicitNextFrameTime.reset();
emit forceStepDone();
return true;
}
void Renderer::doNextStep()
{
auto frame = m_frames.front();
if (setForceStepDone()) {
// if (frame.isValid() && frame.pts() > m_forceStepMaxPos) {
// scheduleNextStep(false);
// return;
// }
}
const auto result = renderInternal(frame);
if (result.done) {
m_explicitNextFrameTime.reset();
m_frames.dequeue();
if (frame.isValid()) {
m_lastPosition.storeRelease(std::max(frame.absolutePts(), lastPosition()));
// TODO: get rid of m_lastFrameEnd or m_seekPos
m_lastFrameEnd = frame.absoluteEnd();
m_seekPos.storeRelaxed(m_lastFrameEnd);
const auto loopIndex = frame.loopOffset().index;
if (m_loopIndex < loopIndex) {
m_loopIndex = loopIndex;
emit loopChanged(id(), frame.loopOffset().pos, m_loopIndex);
}
emit frameProcessed(frame);
} else {
m_lastPosition.storeRelease(std::max(m_lastFrameEnd, lastPosition()));
}
} else {
m_explicitNextFrameTime = Clock::now() + result.recheckInterval;
}
setAtEnd(result.done && !frame.isValid());
scheduleNextStep(false);
}
std::chrono::microseconds Renderer::frameDelay(const Frame &frame, TimePoint timePoint) const
{
return std::chrono::duration_cast<std::chrono::microseconds>(
timePoint - m_timeController.timeFromPosition(frame.absolutePts()));
}
void Renderer::changeRendererTime(std::chrono::microseconds offset)
{
const auto now = Clock::now();
const auto pos = m_timeController.positionFromTime(now);
m_timeController.sync(now + offset, pos);
emit synchronized(id(), now + offset, pos);
}
} // namespace QFFmpeg
QT_END_NAMESPACE
#include "moc_qffmpegrenderer_p.cpp"
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