When the pad has received EOS, its buffer may still be mixed
any number of times, when the pad's framerate is inferior
to the output framerate.
This was introduced by my patch in
https://bugzilla.gnome.org/show_bug.cgi?id=782962, this patch
also correctly addresses the initial issue.
On the raspberry pi no pkg-config file is provided for the bcm_host
library. We are using AC_CHECK_LIB to detect this lib with autotools,
cc.find_library() library is a closer meson equivalent.
https://bugzilla.gnome.org/show_bug.cgi?id=784026
We have to pass the "height" as height = vmeta->offset[1] / width to the
API, which of course does not work well for formats with only a single
plane. Use the whole memory size instead of the offset in that case.
Previous commit let demux call gst_uri_downloader_cancel() on _demux_reset().
Note that, _demux_reset() called during PAUSED_TO_READY and READY_TO_PAUSED.
And, it will set "cancelled" on uridownloader which blocks the use of
uridownloader. The issue is that, subclass can use the uridownloader not only
live streaming for manifest update, but also for fetching another manifests
such as variant and rendition m3u8 of hls streaming. So to unblock it,
demux should clear "cancelled" before processing initial manifest.
https://bugzilla.gnome.org/show_bug.cgi?id=783401
before broadcasting preroll.
The deadlock was as follows:
-> The subclass pushes a buffer on a newly-created stream in T1
-> We take the preroll lock in T1, to handle_preroll
-> The demuxer is stopped in T2, we take the MANIFEST_LOCK
-> T1 starts blocking because it received a reconfigure event
and needs to take the MANIFEST_LOCK
-> T2 deadlocks because it now wants the preroll_lock.
https://bugzilla.gnome.org/show_bug.cgi?id=783255
Make sure the manifest update loop is stopped before proceeding with the
resetting of the manifest data. Otherwise, the updates loop will try to
use it and it leads to a segfault
https://bugzilla.gnome.org/show_bug.cgi?id=783028
As we release the MANIFEST_LOCK in stop_tasks,
demux->priv->old_streams can be set, we need to free these
otherwise we may end up trying to dispose elements in the
READY state.
https://bugzilla.gnome.org/show_bug.cgi?id=783256
When an accurate seek is requested on a live stream, only requests the
exact value for the "starting position" (i.e. start in forward playback
and stop in reverse playback).
https://bugzilla.gnome.org/show_bug.cgi?id=782698
And to make that 100% obvious, only use variables declared within the
switch cases instead of function-wide ones.
Also remove useless one-time-use-only variable.
CID #1409857
The live seeking range was only checked when doing actual seeks. This was
assuming that the rate would always be 1.0 (i.e. the playback would
advance in realtime, and therefore fragments would always be available
since the seeking window moves at the same rate).
With non-1.0 rates, this no longer becomes valid, and therefore we need
to check whether we are still within the live seeking range when advancing.
https://bugzilla.gnome.org/show_bug.cgi?id=783075
What we want is to retry downloading the fragment on 4xx/5xx errors
however returning EOS will cause waiting for a manifest update for live
(which may be a really long time) or stop everything for non-live.
Change that to only return EOS/ERROR once we've reached the error limit.
https://bugzilla.gnome.org/show_bug.cgi?id=776609
GL_RGB565 is sized internal glformat, the corresponding glformat
should be GL_RGB and type is GL_UNSIGNED_SHORT_565. Otherwise will
return GL_INVALID_ENUM when creating texture.
https://bugzilla.gnome.org/show_bug.cgi?id=783066
This ensures that they really get processed in order with
buffers. Just waiting for the queue to be empty is sometimes not
enough as the buffers are dropped from the pad before the result is
pushed to the next element, sometimes resulting in surprising
re-ordering.
In the case an aggregator is created and pads are requested but only
linked later, we end up never updating the upstream latency.
This was because latency queries on pads that are not linked succeed,
so we never did a new query once a live source has been linked, so the
thread was never started.
https://bugzilla.gnome.org/show_bug.cgi?id=757548
When caps changes while streaming, the new caps was getting processed
immediately in videoaggregator, but the next buffer in the queue that
corresponds to this new caps was not necessarily being used immediately,
which resulted sometimes in using an old buffer with new caps. Of course
there used to be a separate buffer_vinfo for mapping the buffer with its
own caps, but in compositor the GstVideoConverter was still using wrong
info and resulted in invalid reads and corrupt output.
This approach here is more safe. We delay using the new caps
until we actually select the next buffer in the queue for use.
This way we also eliminate the need for buffer_vinfo, since the
pad->info is always in sync with the format of the selected buffer.
https://bugzilla.gnome.org/show_bug.cgi?id=780682
The function needs to be unlocked if any data is received, but only
end the first buffer processing on an actual buffer, synchronized events
don't matter on the first buffer processing.
https://bugzilla.gnome.org/show_bug.cgi?id=781673
With the macOS/iOS implementations, the active thread can change
multiple times over the life of a pipeline which would expose a race in
the thread tracking.
Fix by taking a ref on the active thread while the context is active.
https://bugzilla.gnome.org/show_bug.cgi?id=779202
Otherwise fall back to glDrawBuffers. Also check if glReadBuffer exists
before using it.
glDrawBuffer does not exist for GLES, only glDrawBuffers does.
https://bugzilla.gnome.org/show_bug.cgi?id=782376
This commit fixes the following assumptions with live seeking:
1) start was always valid and of type GST_SEEK_TYPE_SET
2) direction was always forward
3) stop should be offsetted when handling non-accurate seeks before
the range start position.
In order to handle more live seeking use-cases (including reverse playback),
only do non-accurate start/stop value clamping for GST_SEEK_TYPE_SET values.
Also add a bit more debugging lines for issues
https://bugzilla.gnome.org/show_bug.cgi?id=782330
When dealing with live streams, we can't rely on GstSegment calculation
since it uses the segment duration to calculate the absolute values.
But since we are dealing with live *and* we know the ranges, we can
compute the absolute seeking values using the range stop (i.e. "now")
as the END position.
Allows seeking back to "live" by using start_type:GST_SEEK_TYPE_END
and start:0
https://bugzilla.gnome.org/show_bug.cgi?id=782228
The allowed live seek ranges returned by subclasses are "inclusive", that is
to say that the "range_stop" value they return is the highest acceptable position
one can seek to (i.e. "now").
Allow seeking to exactly that value
Rationale is to allow the manifest update task to continue running while
seeks are occurring. Otherwise, if the user reliably performs a seek
before the manifest is updated, then as the manifest task is reset on
seeks (and thus the time to wait between manifest updates), the manifest
would never be updated.
This fix makes the manifest update task free-running and continously
update even during seeks.
Some actions (Qos, reconfigure, ...) might take place before we finish pushing out flush_start.
One problem would be that:
1) The QOS handling in adaptivedemux takes the MANIFEST LOCK
That QOS event comes from basesink with its PREROLL_LOCK taken
2) FLUSH_START is sent from adaptivedemux with the MANIFEST_LOCK taken and the basesink flushing handler needs to take the PREROLL_LOCK
=> deadlock
https://bugzilla.gnome.org/show_bug.cgi?id=781320
meson's configure_file emits only a comment like /* #undef ... */
for values which are unset in the configuration_data. For
gstglconfig.h, this differs from the autotools build where the
preprocessor definitions are always either 0 or 1. So loop over a
list of variables to set to zero as default.
Also sync up the gstglconfig.h.meson file with the additional
macros defined by the autotools build.
https://bugzilla.gnome.org/show_bug.cgi?id=781043
Windows aren't always removed in time, and it turns out to be
very, very hard to remove a window in a way that's not racy and
not deadlocky. Since the window itself doesn't leak, freeing
the list on object destruction is enough.
https://bugzilla.gnome.org/show_bug.cgi?id=781018
At the moment that demux is waiting manifest update, the target sequence
of fragment was advanced already. So, checking stream_has_next_fragment()
means looking for the next fragment of target fragment.
This might cause unexpected buffering if each fragment has
large duration and manifest is listing only limited number of fragments.
https://bugzilla.gnome.org/show_bug.cgi?id=780494
The GstGLFramebufferClass struct is typedeffed in
gstgl_fwd.h, and having a duplicate elsewhere is
breaking the cerbero build on my OSX machine,
even though it seems to be working in CI.
When entering this code path, we know that:
We received EOS on this pad.
We consumed all its buffers.
In any case, we want to replace vaggpad->buffer with NULL,
otherwise we will end up mixing the same buffer twice.
https://bugzilla.gnome.org/show_bug.cgi?id=781037
If set, the parent is used to proxy need-context messages from
uridownloader's http source in order to get cookies/headers
from the pipeline.
Based on a patch from Philippe Normand
https://bugzilla.gnome.org/show_bug.cgi?id=726314
When there are new pads pending for a bitrate switch, don't allow
EOS through from the old streams. It will be sent when the new pads are
ready, just before the old streams are removed.
This fixes racy bitrate switching with hlsdemux in urisourcebin
where old pads EOS before new pads appear and the entire pipeline can
EOS if those propagate fast enough
libgstgl has a dependency on libgstallocators starting with:
ed1e4c1 glupload: Add support for Vivante DirectTexture uploads
The dependency wasn't stated in the Makefile, so the build could
occasionally fail if you got unlucky with the ordering of build
steps.
https://bugzilla.gnome.org/show_bug.cgi?id=780330
In commit
> 956c4d0 gl/format: use our own GL format enum's instead of gstvideo's
the name and return type of gst_gl_format_from_video_info changed,
but some returns of the old type were missed. Here they are
updated to the correct type.
https://bugzilla.gnome.org/show_bug.cgi?id=780064
gst_player_set_uri_internal shouldn't free suburi which maybe set
by user to load external subtitle before start play. It just need
reset playbin's subutri property to NULL no matter if there was a
previous one or not.
https://bugzilla.gnome.org/show_bug.cgi?id=779453
All code interacting with Objective-C objects should now use Automated
Reference Counting rather than manual memory management or Garbage
Collection. Because ARC prohibits C-structs from containing
references to Objective-C objects, all such fields are now typed
'gpointer'. Setting and gettings Objective-C fields on such a
struct now uses explicit __bridge_* calls to tell ARC about
object lifetimes.
https://bugzilla.gnome.org/show_bug.cgi?id=777847
For duration queries on live streams, adaptivedemux ignores the query.
The problem then is that the query is answered by the downstream
qtdemux element, with the duration of the currently passing fragment.
This commit changes the behaviour of adaptivedemux to answer the duration
queries for live streams, returning GST_CLOCK_TIME_NONE.
https://bugzilla.gnome.org/show_bug.cgi?id=753879
If we need to send EOS on a pad that hasn't prerolled, generate
an error on the bus instead, otherwise the app will have no idea.
Fixes the HLS testFragmentNotFound test, which is waiting
for either EOS or an error.
To ensure that pads have caps when they are exposed, do
the exposing when all pending streams have prerolled an
output buffer, and only then EOS and remove any old pads.
Improves the switching sequence by making caps available
as soon as a pad appears.
With fixes from Seungha Yang <sh.yang@lge.com>
https://bugzilla.gnome.org/show_bug.cgi?id=758257
send_event() of parent class (i.e., GstBinClass) iterates srcpads
to send SEEK event. And performing it per srcpad is inefficient.
So, let's drop duplicated SEEK event by checking seqnum
https://bugzilla.gnome.org/show_bug.cgi?id=776612
- Add overlay video renderer "video-sink" property, so that can be set
- In create_video_sink, it returns video sink instead of always NULL
- Add new renderer_new_with_sink() API to set video sink
https://bugzilla.gnome.org/show_bug.cgi?id=776490
'extern inline' was added in 2fb76c89 for MSVC (it was just
'inline' before), but all of this doesn't really make sense,
the functions are not going to be inlined anyway, and what
'extern inline' means exactly also appears to depend on the
Cxx standard targetted. Let's just remove the 'extern inline'
entirely. At least gcc6 still emits the exact same code as
before anyway. Fixes compilation/linking with gcc 4.8 as
used on L4T on the TK1.
The reason we previously used queue2 was to calculate the download rate,
but that wasn't entirely correct and we therefore calculate it before
queue2. We therefore now just need a simple queue.
../../../../gst-libs/gst/gl/gl.h:57:45: fatal error: gst/gl/gstglcontrolbindingproxy.h: No such file or directory
#include <gst/gl/gstglcontrolbindingproxy.h>
^
No-one's using/depending on it (it would have criticalled and not worked)
and it's causing more problems than it's solving. Store the GMainContext
in the public struct instead for subclasses to optionally use instead of
relying on the push/pop state to be correct.
https://bugzilla.gnome.org/show_bug.cgi?id=775970
This is potentially racy (in the unlikely scenario that we get two
first-time calls to gst_player_error_quark() at the same time). This
should not impact anything in terms of performance since it's only on
the error path.
The call itself could just be inlined by making GST_PLAYER_ERROR be
defined to the g_quark_from_static_string() call, but this feels ugly
from an API perspective.
If a sub class of GstGLContext does not create a group
then it currently crashes:
0 g_atomic_int_get (&share->refcount)
1 _context_share_group_is_shared (context->priv->sharegroup)
2 gst_gl_context_is_shared
3 _default_set_sync_gl
https://bugzilla.gnome.org/show_bug.cgi?id=774518
This is a subblass of VideoFilter but yet does not use any of it's
features. This also fixes issue in case the incoming images have custom
strides as the VideoMeta is no longer ignored.
https://bugzilla.gnome.org/show_bug.cgi?id=775288
When a MSS server hosts a live stream the fragments listed in the
manifest usually don't have accurate timestamps and duration, except
for the first fragment, which additionally stores timing information
for the few upcoming fragments. In this scenario it is useless to
periodically fetch and update the manifest and the fragments list can
be incrementally built by parsing the first/current fragment.
https://bugzilla.gnome.org/show_bug.cgi?id=755036
Calling g_main_context_push_thread and then g_main_context_invoke()
(used by gst_gl_window_send_message_async()) in the same thread will
cause the invoked function to run immediately instead of being delayed.
This had implications for the creation of the OpenGL context not waiting
until the main loop had completely started up and as a result would
sometimes deadlock in short create/destroy scenarios.
https://bugzilla.gnome.org/show_bug.cgi?id=775171
626bcccff9 removed some locks that
allowed the main loop quit to occur before the context was fully
created.
2776cef25d attempted to readd them but
missed the scop of the quit() call.
Also remove the use of g_thread_join() as that's not safe to use when
it's possible to lose the last reference from the GL thread.
https://bugzilla.gnome.org/show_bug.cgi?id=775171
The smallest section ever needs to be at least 3 bytes (i.e. just the short
header).
Non-short headers need to be at least 11 bytes long (3 for the minimum header,
5 for the non-short header, and 4 for the CRC).
https://bugzilla.gnome.org/show_bug.cgi?id=775048
It's been removed and thus compiling anything against GstGLMemoryEGL
would error with:
In file included from gstomxvideodec.c:41:0:
usr/include/gstreamer-1.0/gst/gl/egl/gstglmemoryegl.h:32:41: fatal error: gst/gl/egl/gstglcontext_egl.h: No such file or directory
#include <gst/gl/egl/gstglcontext_egl.h>
^
https://bugzilla.gnome.org/show_bug.cgi?id=774886
Otherwise, when the application reuses the same UIView, we were getting
draw notifications on the previous view/layer's which weren't valid anymore
and were referencing pointers that had been freed.
https://bugzilla.gnome.org/show_bug.cgi?id=753003
This changes the failure case to require a consecutive number of
failures rather than being spread out over the entire stream.
Fixes the case where fetching the manifest was intermittent.
https://bugzilla.gnome.org/show_bug.cgi?id=774177
For formats that need to update the manifest to know about new
fragments as they're being written by the server would never receive an
updated fragment list after a seek event
https://bugzilla.gnome.org/show_bug.cgi?id=774177
- xcb is supposedly thread-safe!
videotestsrc ! glimagesink now doesn't spuriously result in a
'call XInitThreads()' error however if anybody else is using X11,
then XInitThreads() still needs to be called and multiple glimagesink's
still need XInitThreads().
Everything still takes libX11 handles as they are compatible with the xcb
variants. Unfortunately we cannot move fully over to xcb due to GLX being
entirely based on Xlib. It's also impossible to transform a xcb_connection
to a Display which means we require X11 handles.
The spec allows the core/compatibility profiles to be used
with #version 150.
Also tighten up the tests to check for default profiles being chosen
correctly.
The change to use GST_EXPORT for symbols under Windows requires
GST_EXPORTS for internal use, and that is also needed under Autotools.
The same thing is done for gstreamer-1.0.dll in -core.
The calling convention may be deprecated, but we still need it for
OpenGL. The build issue was caused by an incorrect syntax being used for
the WINAPI (__stdcall) prototype in function pointers which was accepted
by GCC but is rejected by MSVC.
With MSVC, this gives the following warning:
warning C4305: 'function': truncation from 'double' to 'gfloat'
Apparently, MSVC does not figure out what type to use for constants
based on the assignment. This warning is very spammy, so let's try to
fix it.
At minimum, we only need to glFlush() if we are in a shared GL context
environment. Move the glFinish() to when the actual wait is requested
which may be never. Improves the throughput on older GL systems without
GL3/GLES3 and/or fence sync objects.
In order to calculate the *actual* bitrate for downloading a fragment
we need to take into account the time since we requested the fragment.
Without this, the bitrate calculations (previously reported by queue2)
would be biased since they wouldn't take into account the request latency
(that is the time between the moment we request a specific URI and the
moment we receive the first byte of that request).
Such examples were it would be biased would be high-bandwith but high-latency
networks. If you download 5MB in 500ms, but it takes 200ms to get the first
byte, queue2 would report 80Mbit/s (5Mb in 500ms) , but taking the request
into account it is only 57Mbit/s (5Mb in 700ms).
While this would not cause too much issues if the above fragment represented
a much longer duration (5s of content), it would cause issues with short
ones (say 1s, or when doing keyframe-only requests which are even shorter)
where the code would expect to be able to download up to 80Mbit/s ... whereas
if we take the request time into account it's much lower (and we would
therefore end up doing late requests).
Also calculate the request latency for debugging purposes and further
usage (it could allow us to figure out the maximum request rate for
example).
https://bugzilla.gnome.org/show_bug.cgi?id=733959https://bugzilla.gnome.org/show_bug.cgi?id=772330
Using g_thread_join() in _finalize() handlers may result in a deadlock
joining the current thread when the last reference is held by a signal
handler.
e.g.:
error 'Resource deadlock avoided' during 'pthread_join (pt->system_thread, NULL)'
The backtrace looks like this:
[...]
g_thread_join ()
gst_gl_window_finalize ()
gst_gl_window_x11_finalize ()
g_object_unref ()
g_value_unset ()
g_signal_emit_valist ()
g_signal_emit ()
gst_gl_window_send_mouse_event ()
gst_gl_window_mouse_event_cb ()
g_main_dispatch ()
[..]
g_main_loop_run ()
gst_gl_window_navigation_thread ()
g_thread_proxy ()
start_thread ()
clone ()
We cannot set the x, y coordinate of the video frame at the dispmanx at
this point. We need to teach dispmanx backend to understand about
set_render_rectangle API to draw a video with other UI.
This patch keeps the current behavior which places video frame at the
center of the display if there is no set_render_rectangle call to the
dispmanx window.
https://bugzilla.gnome.org/show_bug.cgi?id=766018
e.g. passing with_gl_api=gles2 would still build the glx code but not be
linking against the libGL library which is where the glX* functions are
located and would result in a linker error.
Solved by checking for the libGL library if either opengl or glx may be
needed and then disabling the corresponding deps as requested.
Allowing us to tell GstPad why we are failing an event, which might
be because we are 'flushing' even if the sinkpad is not in flush state
at that point.
The tests were broken since 91fea30, which changed glupload to return
GST_GL_UPLOAD_RECONFIGURE if the texture target in the input buffers doesn't
match the texture-target configured in the output caps.
This commit fixes that and adds more checks for the new behaviour.
Now when used with video/x-raw as input, the GLMemoryUpload method checks for
->tex_target in input GLMemory(es) and sets the output texture-target
accordingly.
Fixes video corruption with a pipeline like avfvideosrc ! video/x-raw !
glimagesink where on macos avfvideosrc pushes RECTANGLE textures but glupload
was configuring texture-target=2D as output.
The headers passed as parametter are relative to the build dir
basically "../subproject/gst-plugins-bad/gst-libs/gst/mpegts/XXX.h"
but that does not match what is needed at build time when building as
subproject, also we always add current dir as include_dir so we are
safe including directly.
And link mpegtsdemux against the 'math' library as it is needed.
Don't set the chosen texture-target into the wrong structure.
The input caps may not be writable, and in any case - the
intention was to configure the othercaps. Also, remove an
extra unref - the othercaps ref is consumed by
gst_caps_make_writable already.
And scale the bitrate with the absolute rate (if it's bigger than 1.0) to get
to the real bitrate due to faster playback.
This allowed in my tests to play a stream with 10x speed without buffering as
the lowest bitrate is chosen, instead of staying/selecting the highest bitrate
and then buffering all the time.
It was previously disabled for not very well specified reasons, which seem to
be not valid anymore nowadays.
Prevent the manifest update loop from looping endlessly
after a seek event, by clearing the variable that tells
the task function not to immediately exit.
The new streams should not be exposed until all streams are done with the
current fragment. The old code is incorrect and actually only checked the
current stream. Fix this by properly checking all streams.
Also, ignore the current stream. The code is only reached when the current
stream finished downloading and since
07f49f15b1 ("adaptivedemux: On EOS, handle it
before waking download loop") download_finished is set after
gst_adaptive_demux_stream_advance_fragment_unlocked() is called.
Without this HLS playback with multiple streams is broken, because the new
streams are never exposed.
https://bugzilla.gnome.org/show_bug.cgi?id=770075
https://github.com/mesonbuild/meson
With contributions from:
Tim-Philipp Müller <tim@centricular.com>
Matej Knopp <matej.knopp@gmail.com>
Jussi Pakkanen <jpakkane@gmail.com> (original port)
Highlights of the features provided are:
* Faster builds on Linux (~40-50% faster)
* The ability to build with MSVC on Windows
* Generate Visual Studio project files
* Generate XCode project files
* Much faster builds on Windows (on-par with Linux)
* Seriously fast configure and building on embedded
... and many more. For more details see:
http://blog.nirbheek.in/2016/05/gstreamer-and-meson-new-hope.htmlhttp://blog.nirbheek.in/2016/07/building-and-developing-gstreamer-using.html
Building with Meson should work on both Linux and Windows, but may
need a few more tweaks on other operating systems.
Multiple threads may be accessing the wayland fd at the same time which
requires the use of special wayland API to deal with to ensure nobody
will steal reads and cause a stall for anyone else.
This allows to gradually download part of a fragment when the final size is
not known and only a part of it should be downloaded. For example when only
the moof should be parsed and/or a single keyframe should be downloaded.
https://bugzilla.gnome.org/show_bug.cgi?id=741104
When connect to qmlglsrc, x11 event loop will be replace by qt event loop
which will cause the window cannot receive event from xserver, such as resize
https://bugzilla.gnome.org/show_bug.cgi?id=768160
Makes infinitely more sense and implementation were expecting that behaviour
anyway and would enter a resize, draw, resize, draw, ... cycle instead of only
resizing once.
This helps catch those 404 server errors in live streams when
seeking to the very beginning, as the server will handle a
request with some delay, which can cause it to drop the fragment
before sending it.
https://bugzilla.gnome.org/show_bug.cgi?id=753751
To allow adaptivedemux to make retry decisions, it needs to know what
sort of HTTP error has occurred. For example, the retry logic for a
410 error is different from a 504 error.
https://bugzilla.gnome.org/show_bug.cgi?id=753751
Some derived classes (at least dashdemux) expose a seeking range
based on wall clock. This means that a subsequent seek to the start
of this range will be before the allowed range.
To solve this, seeks without the ACCURATE flag are allowed to seek
before the start for live streams, in which case the segment is
shifted to start at the start of the new seek range. If there is
an end position, is is shifted too, to keep the duration constant.
https://bugzilla.gnome.org/show_bug.cgi?id=753751
There's no need for the jump to an extra thread in most cases, especially
when relying solely on a shader to render. We can use the provided
render_to_target() functions to simplify filter writing.
Facilities are given to create fbo's and attach GL memory (renderbuffers
or textures). It also keeps track of the renderable size for use with
effective use with glViewport().
Make state changes of internal elements more reliable by locking
their state, and ensuring that they aren't blocked pushing data
downstream before trying to set their state.
Add a boolean to avoid starting tasks when the main
thread is busy trying to shut the element down.
Try harder to make switching pads work better by
making sure concurrent downloads are finished before exposing
a new set of pads.
Release the manifest lock when signalling no-more-pads, as
that can call back into adaptivedemux again
If other stream fragments are still downloading but new streams
have been scheduled, don't expose them yet - wait until the last
one finishes. Otherwise, we can cancel a partially downloaded
auxilliary stream and cause a gap.
Drop the manifest lock when performing actions that might
call back into adaptivedemux and trigger deadlocks, such
as adding/removing pads or sending in-band events (EOS).
Unlock the manifest lock when changing the child bin state to
NULL, as it might call back to acquire the manifest lock when
shutting down pads.
Drop the manifest lock while pushing events.
In the case of KEY_UNIT and TRICKMODE_KEY_UNITS seeks, we want to
"snap" to the closest fragment.
Without this, we end up pushing out a segment which does not match
the first fragment timestamp being pushed out, resulting in one or
more buffers being eventually dropped because they are out of segment.
Calling glUniformMatrix before the shader is bound is invalid and
would result in errors like:
GL_INVALID_OPERATION in glUniformMatrix(program not linked)
Move glUniformMatrix() to after the gst_gl_shader_use() call.
