When we have nested timelines, we need to make sure the underlying
formatted file is reloaded when commiting the main composition to
take into account the new timeline.
In other to make the implementation as simple as possible we make
sure that whenever the toplevel composition is commited, the decodebin
holding the gesdemux is torn down so that a new demuxer is created
with the new content of the timeline.
To do that a we do a NleCompositionQueryNeedsTearDown query to which
gesdemux answers leading to a full nlecomposition stack
deactivation/activation cycle.
Make sure that an event resulting from the seek happens before removing
the pad probe, dropping anything while it is not the case.
This guarantees that the seek happens before `nlesource` outputs
anything. This was not necessary as with decodebin or usual source
flushing seeks lead to synchronous flush_start/flush_stop and we could
safely assume that once the seek is sent, it was happenning.
With nested `nlecomposition` this assumption is simply not true as
in the composition seeks are basically cached and happen later in
the composition updating thread.
This fixes races where we ended up removing the blocking probe before
the seek actually started to be executed in the nlecomposition
nested inside an nlesource which leaded to data from *before* the seek
to be outputed which means we could display wrong frames,
and it was leading to interesting deadlocks.
Seeks that lead to a stack change lead to deactivating the current
stack. At that point we explicitely flush downstream as a reaction to
the flushing seek. Until now those flushes had a random seqnum, this
fails if we are a nested compostion as the parent composition will end
up dropping that flush which in turns might lead to deadlocks. For
example, the flush goes through a `compositor` which wants to flush
downstream to stop its srcpad task, but that flush wouldn't have
"released" its srcpad thread if the composition srcpad drops it, meaning
it won't be able to stop the task ever.
Otherwise if we shutdown a composition whith an nested composition
(inside a source in the test) and leak it, we end up with the nested
composition task still running (in READY) which is bad.
Add a test for that which leaks the pipeline on purpose.
Otherwise there is a race where we trigger the seek at the exact
same time the composition is being teared down potentially leading
to basesrc restarting its srcpad task which ends up being leaked.
Fixes ges.playback.scrub_backward_seeking.test_title.audio_video.vorbis_theora_ogg
and probably all its friends timeouting with the following stack trace:
(gdb) t a a bt
Thread 4 (Thread 0x7f5962acd700 (LWP 19997)):
#0 0x00007f5976713efd in syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1 0x00007f5976a9d3f3 in g_cond_wait (cond=cond@entry=0x7f5938125410, mutex=mutex@entry=0x7f59381253c8) at gthread-posix.c:1402
#2 0x00007f5976c9e26b in gst_task_func (task=0x7f59381253b0 [GstTask]) at ../subprojects/gstreamer/gst/gsttask.c:313
#3 0x00007f5976a7ecb3 in g_thread_pool_thread_proxy (data=<optimized out>) at gthreadpool.c:307
#4 0x00007f5976a7e2aa in g_thread_proxy (data=0x7f5954071d40) at gthread.c:784
#5 0x00007f59767ea58e in start_thread (arg=<optimized out>) at pthread_create.c:486
#6 0x00007f59767196a3 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
Thread 3 (Thread 0x7f5963fff700 (LWP 19995)):
#0 0x00007f597670e421 in __GI___poll (fds=0xe32da0, nfds=2, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1 0x00007f5976a553a6 in g_main_context_poll (priority=<optimized out>, n_fds=2, fds=0xe32da0, timeout=<optimized out>, context=0xe31ff0) at gmain.c:4221
#2 0x00007f5976a553a6 in g_main_context_iterate (context=0xe31ff0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at gmain.c:3915
#3 0x00007f5976a55762 in g_main_loop_run (loop=0xe32130) at gmain.c:4116
#4 0x00007f59768db10a in gdbus_shared_thread_func (user_data=0xe31fc0) at gdbusprivate.c:275
#5 0x00007f5976a7e2aa in g_thread_proxy (data=0xe1b8a0) at gthread.c:784
#6 0x00007f59767ea58e in start_thread (arg=<optimized out>) at pthread_create.c:486
#7 0x00007f59767196a3 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
Thread 2 (Thread 0x7f5968dcc700 (LWP 19994)):
#0 0x00007f597670e421 in __GI___poll (fds=0xe1bcc0, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1 0x00007f5976a553a6 in g_main_context_poll (priority=<optimized out>, n_fds=1, fds=0xe1bcc0, timeout=<optimized out>, context=0xe1b350) at gmain.c:4221
#2 0x00007f5976a553a6 in g_main_context_iterate (context=context@entry=0xe1b350, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at gmain.c:3915
#3 0x00007f5976a554d0 in g_main_context_iteration (context=0xe1b350, may_block=may_block@entry=1) at gmain.c:3981
#4 0x00007f5976a55521 in glib_worker_main (data=<optimized out>) at gmain.c:5861
#5 0x00007f5976a7e2aa in g_thread_proxy (data=0xe1b800) at gthread.c:784
#6 0x00007f59767ea58e in start_thread (arg=<optimized out>) at pthread_create.c:486
#7 0x00007f59767196a3 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
Thread 1 (Thread 0x7f5975df4fc0 (LWP 19993)):
#0 0x00007f5976713efd in syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1 0x00007f5976a9d3f3 in g_cond_wait (cond=cond@entry=0xe34020, mutex=0xe39b80) at gthread-posix.c:1402
#2 0x00007f5976a7f41c in g_thread_pool_free (pool=0xe34000, immediate=0, wait_=<optimized out>) at gthreadpool.c:776
#3 0x00007f5976c9f1ca in default_cleanup (pool=0xe256b0 [GstTaskPool]) at ../subprojects/gstreamer/gst/gsttaskpool.c:89
#4 0x00007f5976c9e32d in init_klass_pool (klass=<optimized out>) at ../subprojects/gstreamer/gst/gsttask.c:161
#5 0x00007f5976c9e502 in gst_task_cleanup_all () at ../subprojects/gstreamer/gst/gsttask.c:381
#6 0x00007f5976c214f4 in gst_deinit () at ../subprojects/gstreamer/gst/gst.c:1095
#7 0x000000000040394f in main (argc=6, argv=<optimized out>) at ../subprojects/gst-editing-services/tools/ges-launch.c:94
This commit is to ensure cleanup internal elements on state change failure.
nlecomposition posts its own error message after cleanup child.
If we don't suppress child error, meanwhile, an application
triggered downward state change (resulting from child error message)
might be able to reach nlecomposition before internal cleaning child up.
That eventually results to downward state change failure.
We have an optiominisation to avoid double seeks when a seek is passed
the end of the current stack. The problem, is that we no longer flush
the pipeline when this code is reached. This patch comments out this
optimization adding a FIXME. As mention, flushing the stack instead of
seeking would work, but does not seem trivial considering all the
mechanic inplace to forward or not the events.
https://bugzilla.gnome.org/show_bug.cgi?id=787405
The allocation query may block on the sink when in pause. As a side effect, we
may never get a buffer now that tee does forward the allocation query.
This would often lead in a pipeline stall.
https://bugzilla.gnome.org/show_bug.cgi?id=787405
Otherwise they will just be the ones from the previous seek event/
stack setup and be meaningless.
Also document the priv->segment meaning.
Fixes https://phabricator.freedesktop.org/T7796
To avoid a race when tearing down the composition (PAUSED_TO_READY),
we should make sure to tear down the current stack and let the GstBin
class handle the remaining thing to do during the change state.
We should still ignore any error happening when tearing down the
bin state just in case.
https://bugzilla.gnome.org/show_bug.cgi?id=775051
This reverts commit 57d40bec1a.
Apparently it causes timeouts in the unit tests on Jenkins and
Thibault's machine, and in the gst-validate tests.
Caused by elements staying in PAUSED and waiting to be set to PLAYING.
Needs further investigation.
This keeps everything in a more consistent order and makes sure that the
base class is already set up completely before we start doing anything.
It also prevents from doing any setup if the base class fails, and
possibly not shutting things down again then.
https://bugzilla.gnome.org/show_bug.cgi?id=774480
Otherwise we could set the state of the children to PAUSED already (i.e.
start dataflow) from the composition's task, while the composition
itself is currently chaining up to the parent class' change state
function and did not activate the pads yet. This causes buffers and
events to be discarded, and everything to stop with a not-negotiated
error.
https://bugzilla.gnome.org/show_bug.cgi?id=774480
The seek action might currently be handled (in which case it is not in
the actions list and the action lock is not locked), but not actually
handled completely yet (the seqnum is not stored yet).
To prevent this, we remember what the current action is that is being
handled, and also compare to that.
https://bugzilla.gnome.org/show_bug.cgi?id=774149
Those tag are meaningless in for the new stream created by the composition
First step toward fixing T3070
Differential Revision: https://phabricator.freedesktop.org/D1327
By putting uridecodebin into a bin with a ghostpad. Without this,
nlesource tries to get a srcpad too early (before uridecodebin added
one) and everything fails miserably.
This has to be fixed properly in nlesource at some point, by properly
handling dynamically added pads. Currently they can only work if they
are added in states <= READY, which is not the usual case.
https://bugzilla.gnome.org/show_bug.cgi?id=771843
We might receive another seek from the application while the action task is
handling a previous seek (and thus setting seeking_itself to TRUE). To prevent
this seek to go through directly instead of being added as an action, also
check if the seek event was received from our action task thread or some other
thread.
https://bugzilla.gnome.org/show_bug.cgi?id=767053
When nlecomposition is finalized with pending add action or io,
associated elements are not unreffed as they should since caller gives
us the reference when calling gst_bin_add causing them to be leaked.
So to make sure we don't leak a reference on element when adding one to
the bin, each stage (action and pending_io) hold a reference on element
and release it when stage is done.
https://bugzilla.gnome.org/show_bug.cgi?id=766455
