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transcriberbin: Don't keep state locked while querying upstream latency

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Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-rs/-/merge_requests/2463>
This commit is contained in:
Sebastian Dröge 2025-08-13 13:57:17 +03:00
parent 357336cd56
commit 9710476c96
1 changed files with 20 additions and 16 deletions
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36
video/closedcaption/src/transcriberbin/imp.rs
View file

@ -16,6 +16,7 @@ use std::collections::{HashMap, HashSet};
use std::sync::Mutex;
use std::sync::LazyLock;
use std::sync::MutexGuard;
use super::{CaptionSource, MuxMethod};
@ -2175,19 +2176,21 @@ impl TranscriberBin {
);
}
fn query_upstream_latency(&self, state: &State) -> gst::ClockTime {
fn query_upstream_latency(&self, state_guard: MutexGuard<Option<State>>) -> gst::ClockTime {
let state = state_guard.as_ref().unwrap();
let mut min = gst::ClockTime::from_seconds(0);
for pad in state
.audio_sink_pads
.values()
.map(|p| p.upcast_ref::<gst::Pad>())
.chain(
[&self.video_sinkpad]
.iter()
.map(|p| p.upcast_ref::<gst::Pad>()),
)
{
let pads = Iterator::chain(
state
.audio_sink_pads
.values()
.map(|p| p.clone().upcast::<gst::Pad>()),
std::iter::once(&self.video_sinkpad).map(|p| p.clone().upcast::<gst::Pad>()),
)
.collect::<Vec<_>>();
drop(state_guard);
for pad in pads {
let mut upstream_query = gst::query::Latency::new();
if pad.peer_query(&mut upstream_query) {
@ -2270,11 +2273,12 @@ impl TranscriberBin {
match query.view_mut() {
QueryViewMut::Latency(q) => {
let state = self.state.lock().unwrap();
if let Some(state) = state.as_ref() {
let upstream_min = self.query_upstream_latency(state);
let min =
upstream_min + self.our_latency(state, &self.settings.lock().unwrap());
let state_guard = self.state.lock().unwrap();
if let Some(ref state) = &*state_guard {
let our_latency = self.our_latency(state, &self.settings.lock().unwrap());
let upstream_min = self.query_upstream_latency(state_guard);
let min = upstream_min + our_latency;
gst::debug!(CAT, imp = self, "calculated latency: {}", min);