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utils/fallbacksrc: Remove pad probes before restarting the source

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Otherwise the source might be blocked downstream in the pad probe on the
queue. Previously this was not a problem because the probes were
directly on the srcpads of the source but due to a workaround for
uridecodebin3 buffering bugs this is not the case anymore.
This commit is contained in:
Sebastian Dröge 2020-08-04 10:37:08 +03:00
parent a2c0d70930
commit 4b171ec7ff
1 changed files with 38 additions and 2 deletions
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40
utils/fallbackswitch/src/fallbacksrc.rs
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@ -1324,6 +1324,7 @@ impl FallbackSrc {
});
}
assert!(stream.source_srcpad_block.is_none());
stream.source_srcpad = Some(pad.clone());
stream.source_srcpad_block = Some(self.add_pad_probe(element, stream));
@ -1921,18 +1922,53 @@ impl FallbackSrc {
let source_weak = state.source.downgrade();
element.call_async(move |element| {
let src = FallbackSrc::from_instance(element);
let source = match source_weak.upgrade() {
None => return,
Some(source) => source,
};
// Remove blocking pad probes if they are still there as otherwise shutting down the
// source will deadlock on the probes.
let mut state_guard = src.state.lock().unwrap();
let state = match &mut *state_guard {
None
| Some(State {
source_pending_restart: false,
..
}) => {
gst_debug!(CAT, obj: element, "Restarting source not needed anymore");
return;
}
Some(state) => state,
};
for (source_srcpad, block) in [state.video_stream.as_mut(), state.audio_stream.as_mut()]
.iter_mut()
.filter_map(|s| s.as_mut())
.filter_map(|s| {
if let Some(block) = s.source_srcpad_block.take() {
Some((s.source_srcpad.as_ref().unwrap(), block))
} else {
None
}
})
{
gst_debug!(
CAT,
obj: element,
"Removing pad probe for pad {}",
source_srcpad.get_name()
);
block.pad.remove_probe(block.probe_id);
}
drop(state_guard);
gst_debug!(CAT, obj: element, "Shutting down source");
let _ = source.set_state(gst::State::Null);
// Sleep for 1s before retrying
let src = FallbackSrc::from_instance(element);
let mut state_guard = src.state.lock().unwrap();
let state = match &mut *state_guard {
None