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fallbackswitch: Recheck active_sinkpad after schedule_timeout

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`schedule_timeout` can synchronously call `handle_timeout` and change the
active pad. We need to update `is_active` afterwards.

After calling `schedule_timeout` with `end_running_time`, we used to
assume there was no pad switch and reset `switched_pad` immediately. If
the pad actually got switched, this would make us miss a sticky events
update.
This commit is contained in:
Jan Alexander Steffens (heftig) 2022-05-25 17:45:15 +02:00
parent d77929252a
commit 68c55ca413
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GPG key ID: 3B94A80E50A477C7
1 changed files with 17 additions and 15 deletions
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32
utils/fallbackswitch/src/fallbackswitch/imp.rs
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@ -14,7 +14,7 @@ use gst::{debug, log, trace};
use once_cell::sync::Lazy;
use parking_lot::Mutex;
use parking_lot::{Mutex, MutexGuard};
use std::sync::atomic::{AtomicU32, Ordering};
const PROP_PRIORITY: &str = "priority";
@ -689,18 +689,19 @@ impl FallbackSwitch {
* in case the initial active pad never receives a buffer */
if let Some(running_time) = start_running_time {
if state.timeout_clock_id.is_none() && !is_active {
// May change active pad immediately
self.schedule_timeout(element, &mut state, &settings, running_time);
is_active = self.active_sinkpad.lock().as_ref() == Some(pad);
}
}
let mut state = if let Some(clock_id) = &output_clockid {
drop(state);
if let Some(clock_id) = &output_clockid {
MutexGuard::unlocked(&mut state, || {
let (_res, _) = clock_id.wait();
});
let (_res, _) = clock_id.wait();
self.state.lock()
} else {
state
};
is_active = self.active_sinkpad.lock().as_ref() == Some(pad);
}
let mut pad_state = pad_imp.state.lock();
if pad_state.flushing {
@ -708,10 +709,6 @@ impl FallbackSwitch {
return Err(gst::FlowError::Flushing);
}
let is_active = self.active_sinkpad.lock().as_ref() == Some(pad);
let switched_pad = state.switched_pad;
let discont_pending = state.discont_pending;
if is_active {
if Option::zip(start_running_time, state.output_running_time).map_or(
false,
@ -749,13 +746,12 @@ impl FallbackSwitch {
}
if let Some(end_running_time) = end_running_time {
// May change active pad immediately
self.schedule_timeout(element, &mut state, &settings, end_running_time);
is_active = self.active_sinkpad.lock().as_ref() == Some(pad);
} else {
state.cancel_timeout();
}
state.switched_pad = false;
state.discont_pending = false;
}
if let Some(running_time) = end_running_time {
@ -768,6 +764,12 @@ impl FallbackSwitch {
log!(CAT, obj: pad, "Dropping {:?} on inactive pad", buffer);
return Ok(gst::FlowSuccess::Ok);
}
let switched_pad = state.switched_pad;
let discont_pending = state.discont_pending;
state.switched_pad = false;
state.discont_pending = false;
let _stream_lock = self.src_pad.stream_lock();
drop(state);