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mpegtslivesrc: Check if old compared to new PCR clock estimation is too far off

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It the difference between the two estimations is more than 1s then
consider this a discontinuity too.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-rs/-/merge_requests/1767>
This commit is contained in:
Sebastian Dröge 2024-09-06 10:35:05 +03:00 committed by GStreamer Marge Bot
parent c5b1ebc7d8
commit c32cb20906
1 changed files with 27 additions and 1 deletions
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28
net/mpegtslive/src/mpegtslive/imp.rs
View file

@ -185,7 +185,33 @@ impl MpegTSLiveSourceState {
(self.base_pcr, self.base_monotonic, self.last_seen_pcr)
{
gst::trace!(CAT, "pcr:{pcr}, monotonic_time:{monotonic_time}");
if let Some(handled_pcr) = MpegTsPcr::new_with_reference(pcr, &last_seen_pcr) {
let mut handled_pcr = MpegTsPcr::new_with_reference(pcr, &last_seen_pcr);
if let Some(new_pcr) = handled_pcr {
// First check if this is more than 1s off from the current clock calibration and
// if so consider it a discontinuity too.
let (internal, external, num, denom) = self.external_clock.calibration();
let expected_external = gst::Clock::adjust_with_calibration(
monotonic_time,
internal,
external,
num,
denom,
);
let new_external =
gst::ClockTime::from(new_pcr.saturating_sub(base_pcr)) + base_monotonic;
if expected_external.absdiff(new_external) >= gst::ClockTime::SECOND {
gst::warning!(
CAT,
"New PCR clock estimation {new_external} too far from old estimation {expected_external}: {}",
new_external.into_positive() - expected_external,
);
handled_pcr = None;
}
}
if let Some(handled_pcr) = handled_pcr {
new_pcr = handled_pcr;
gst::trace!(
CAT,