steam-frame/Pixelplanet--Pixel-VR-Player
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Fix post-seek freeze: resync playback clock when it falls far behind queued frames (NOPTS prime anchored it to 0)

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Pixelplanet committed 2026-10-11 20:27:02 +02:00
1 parent 101875f6c9
commit e28882ff2b
1 file changed
+24 -3
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src/media/media_engine.cpp
+24 -3
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@@ -1038,8 +1038,16 @@ bool MediaEngine::latestFrame(VideoFrame& out) {
if (q.empty()) {
return false;
}
double clock = impl_->currentClock();
// Re-anchor if the clock has fallen far behind the queued frames (e.g. a
// post-seek frame with no PTS anchored it to 0); otherwise every frame stays
// "early" forever and the picture freezes while decoding continues.
if (impl_->primed && q.front().pts > clock + 0.5) {
impl_->playClock.start(q.front().pts);
clock = q.front().pts;
}
const std::size_t due = selectDueIndex(
impl_->currentClock(), impl_->primed,
clock, impl_->primed,
[&](std::size_t i) { return q[i].pts; }, q.size());
if (due == static_cast<std::size_t>(-1)) {
return false; // all queued frames are still in the future
@@ -1065,8 +1073,18 @@ bool MediaEngine::latestDrmFrame(DrmVideoFrame& out) {
if (q.empty()) {
return false;
}
double clock = impl_->currentClock();
// Re-anchor if the clock has fallen far behind the queued frames (e.g. a
// post-seek frame with no PTS anchored it to 0); otherwise every frame stays
// "early" forever and the picture freezes while decoding continues.
if (impl_->primed && q.front().pts > clock + 0.5) {
PIXELVR_LOG_INFO("MediaEngine: clock resync %.2f -> %.2f", clock,
q.front().pts);
impl_->playClock.start(q.front().pts);
clock = q.front().pts;
}
const std::size_t due = selectDueIndex(
impl_->currentClock(), impl_->primed,
clock, impl_->primed,
[&](std::size_t i) { return q[i].pts; }, q.size());
if (due == static_cast<std::size_t>(-1)) {
return false; // all queued frames are still in the future
@@ -1082,7 +1100,10 @@ bool MediaEngine::latestDrmFrame(DrmVideoFrame& out) {
out = std::move(q.front()); // transfers fd + keepAlive ownership to caller
q.pop_front();
impl_->primed = true;
if (firstFrame) impl_->playClock.start(out.pts); // anchor to the first frame
if (firstFrame) {
impl_->playClock.start(out.pts); // anchor to the first frame
PIXELVR_LOG_INFO("MediaEngine: prime pts=%.2f clock=%.2f", out.pts, clock);
}
return true;
}