v4l2codecs: vp9: Add alpha decodebin wrapper

This will allow HW accelerated decoding of WebM alpha videos.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1439>

v4l2codecs: plugin: Minor style fix

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1439>

v4l2codecs: decoder: Improve logging of timed out request

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1439>

v4l2codecs: mpeg2: Check that the decoder output formats

This is to avoid exposing a decoder for which we don't support any
output format. This happens on platform using vendor formats or
not yet supported tiles formats.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1439>

vp9alphadecodebin: Fix auto-pluging v4l2slvp9dec

This adds the alignment field to the template caps. Without this field
set, the auto-plugger will see fixed caps and will use
gst_caps_is_subset() against the caps produced by the parser. This is a
challenge for all cases where a parser can do conversion. This is fixed
by adding alignment field, which makes the auto-pluggers do an
intersection of the caps as it gets unfixed caps after intersection now.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1439>

ximagesrc: avoid blocking wait for X events

XNextEvent() blocks indefinitely in absence of X11 events, which can
prevent the pipeline from stopping.

This can cause problems when ximagesrc is used in "remote desktop"
scenarios and the GStreamer application itself, through which the user
is viewing and controlling the machine, is the only source of input
events.

Replace the call with non-blocking XCheckTypedEvent().

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1438>

multifilesrc: fix caps leak

since `gst_caps_replace()` and `gst_pad_set_caps()` both ref the caps and neither of them takes the ownership of the caps -> it must be unreffed in `gst_multi_file_src_set_property()`

to test the leak (on Unix): `echo coucou > /tmp/file.txt && GST_TRACERS=leaks GST_DEBUG="GST_TRACER:7" gst-launch-1.0 multifilesrc location=/tmp/file.txt caps='txt' ! fakesink`

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1436>

d3d11window: Remove hack related to color space selection

Use input GstVideoColorPrimaries without any special case handling
otherwise rendered image color would be very wrong.

The hack was added to work around an issue that some Intel driver
couldn't handle wide color gamut image without HDR10 metadata, specifically PQ image.
But device capability can be checked via a method added in
https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/merge_requests/1723
so there's no issue now.

Fixes: https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/issues/1175
Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1430>

d3d11window: Fix typo in debug message

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1430>

elementfactory: Annotate create_full and make_full to take arrays

We need the array annotation for it to be usable from the introspection side.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1427>

codecs: h264decoder: Fix return value type

Return value should be GstFlowReturn not gboolean

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1426>

codecs: h265decoder: Fix return value if klass->new_picture isn't set

If klass->new_picture isn't set we need to initialize
ret with GST_FLOW_OK to avoid unwanted error case

Fixes: 5b405d15858b ("codecs: h265decoder: Use GstFlowReturn everywhere")
Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1426>

gstnetclockclient: signal lost sync if remote time resets

When detecting the remote time has been reset which may occur if remote
device providing the clock server has been power reset, then clock is
no longer synced. Setting clock state will trigger a signal to client
informing on sync lost making it possibility to take appropriate action.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/975>

wpevideosrc: Use basesrc event vfunc

Allows for basic default handling from the base class.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1422>

ci: run fedora amd64 docker jobs on packet runners

Which have much better network connectivity to fdo gitlab.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1420>

jpegdec: only allow conversions from RGB

libjpeg-turbo only supports converting from RGB to other RGB formats.
Fix runtime error when trying to convert from a YUV format for example.

Fix #916

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1421>

teletextdec: fix minor string leak

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1416>

ci: fedora-docker: Cache media files

As of now all integration tests endup fetching 600MB of media every run. This
will increase the docker side, but this is to the traceof that the docker
image will quickly be cached on all runners.

Fixes #841

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1413>

ristsink: set properties on children early

The properties on the udpsink/udpsrc elements need to be set before
there is any state change. If not, in a network without default gateway,
udpsink tries to bind an a NULL interface and fails.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1411>

v4l2codecs: mpeg2: Fix selected sizeimage

Due to a copy paste bug, the bitdepth was never set and that was leading
to requesting sizeimage of 0. Previously that worked since the driver
would in that case pick a size for us. But now the we bumped the minimum
to 4KB, the driver happily allocate 4KB of bitstream which lead to
decoding error.

As MPEG2 have a fixed bitdeph of 8, use a define instead of the run-time
variable.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1415>

v4l2codecs: vp9: Drop frames on non-keyframe format change

V4L2 does not yet support this feature, this will skip over the
transition portion up to the next keyframe.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1404>

v4l2codecs: Fix renegotiation

If we hold the last reference to the allocator, leaving the device
streaming will cause an EBUSY error when trying to free the allocate
buffers.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1404>

d3d11vp9dec: Drop frames on non-keyframe format change

... in case of NVIDIA GPU

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1407>

nvvp9sldec: Drop frames on non-keyframe format change

NVDEC doesn't seem to be able to handle the case

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1407>

codecs: vp9: Drop frames on non-keyframe format change

... if subclass does not support the case

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1407>

codecs: vp9: Also consider render_width/height

Also emits new_sequence if on keyframe and the render_width/height have
change. The subclass can always optimize this if the frame resolution
didn't change, the output caps needs to reflect this though.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1407>

rtpsink: set properties on children early

The properties on the udpsink/udpsrc elements need to be set before
there is any state change. If not, in a network without default gateway,
udpsink tries to bind an a NULL interface and fails.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1398>

vaapidecodebin: Misc enhancements.

- Use GST_WARNING rather than g_critical

- Replace gst_ghost_pad_new_from_template() with
  gst_ghost_pad_new() to avoid using the template.

- Declare extern variable

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1405>

vaapidecode: Autogenerate caps template.

vaapidecode is used in vaapidecodebin and it exposes all the
theoretically supported caps, but that slows down autoplug. With this
autplug is negotiated faster, giving more option to decodebin to select
other decoder.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1405>

v4l2codecs: vp9: Remove uneeded picture data

The GstV4l2Request now holds a reference on the picture buffer and is
recounted already. This effectively removes usage of GRefCount which is only
available in GLib 2.58, while we support 2.56.

Fixes #910

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1402>

v4l2codecs: decoder: Add method to get the pic_buf

This helper will be needed for VP9 frame duplication.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1402>

v4l2codecs: vp9: Add missing error checks in decide_allocation

This could otherwise lead to crash.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1402>

ci: Avoid fetching tags for build jobs

Avoid fetching tags since we don't need them for builds.
Only caveat might be what happens when a pipeline from
a tag is triggered

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1400>

ci: Looks like we where not triggering pipelines for tags

Oops.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1400>

ci: Set GIT_DEPTH variable

This switches gitlab-runner to using shallow clones

related #841

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1400>

basesink: Add missing annotations

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1392>

pushsrc: Add missing annotations

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1392>

bitwriter: Add missing annotations

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1392>

baseparse: Add missing annotations

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1392>

v4l2codecs: h264: Fix typo in comment

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1387>

v4l2codecs: h264: Properly set pic_num/frame_num

The V4L2 uAPI uses pic_num for both PicNum and ShortTermPicNum. It also
doe the same for both FrameNum and LongTermFrameIdx. This change does
not change the fluster score, but fixed a visual corruption noticed
with some third party streams.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1387>

va: Use a lock to protect the surface copy by using vpp.

 If we use vpp to do the surface copy, its operation is not atomic.
 We need to maintain the filter's context unchanged during the whole
 copy progress.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1373>

va: Use the GstVaSurfaceCopy of the allocator atomically.

The mem_copy() of the allocator can be called simultaneously from
different threads. We should use atomic pointer operations to create
and use the GstVaSurfaceCopy of the allocator.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1373>

va: DMA allocator: Set the copied memory properly when popped from pool.

The current code does not set the copied memory correctly when it is popped
from the surface cache pool.
1. We forget to ref the allocator, which causes the allocator to be freed
   unexpected, and we get a crash later because of the memory violation.
2. We forget to add ref_mems_count, which causes the surface leak because
   the surface can not be pushed back to the cache pool again.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1373>

v4l2codecs: gstv4l2decoder: set minimum sizeimage

Set minimum sizeimage such that there is enough space for any overhead
introduced by the codec.

Notably fix a vp9 issue in which a small image would not have a
bitstream buffer large enough to accomodate it.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1012>

v4l2codecs: gstv4l2codecsvp9dec: implement a render delay

The v4l2 backend support delayed output for performance reasons.
It is then possible to use render delays to queue multiple requests
simultaneously, thus increasing performance.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1012>

v4l2codecs: vp9dec: Implement VP9 v4l2 decoder

Implement a v4l2 based vp9 decoder element based on the preexisting vp8
v4l2 decoder.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1012>

v4l2codecs: update to the new uAPI

The new VP9 stateless API is in its way to be destaged. Update our
headers to match.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1012>

codecs: gstvp9decoder: copy frame->system_frame_number into picture

A comment in gstvp9picture.h states that picture->system_frame_number
should get its value from frame->system_frame_number, but in fact
it was never copied at all.

Fix it.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1012>

codecs: gstvp9{decoder|statefulparser}: optionally parse compressed headers

Rework gstvp9{decoder|statefulparser} to optionally parse compressed headers.
The information in these headers might be needed for accelerators
downstream, so optionally parse them if downstream requests it.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1012>

v4l2: handle 0x0 sizes gracefully

Also ignore 0x0 sizes in the fallback case and assume the size can be
anything between 1x1 and MAXxMAX.

This fixes the case where a width=0, height=0 caps are created. Whith
this patch the caps will contain width=[1,MAX], height=[1,MAX].

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1396>

webrtcbin: deduplicate extmaps

When an extmap is defined twice for the same ID, firefox complains and
errors out (chrome is smart enough to accept strict duplicates).

To work around this, we deduplicate extmap attributes, and also error
out when a different extmap is defined for the same ID.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1383>

codecs: mpeg2decoder: drain() only when significant sequence changes.

There are a lot of info in the mpeg2's sequence(also including ext
display_ext and scalable_ext). We need to notify the subclass about
its change, but not all the changes should trigger a drain(), which
may change the output picture order. For example, the matrix changes
in sequence header does not change the decoder context and so no need
to trigger a drain().

Fixes: #899
Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1375>

openjpegenc: Fix build warning

Compiling C object subprojects/gst-plugins-bad/ext/openjpeg/gstopenjpeg.dll.p/gstopenjpegenc.c.obj
../subprojects/gst-plugins-bad/ext/openjpeg/gstopenjpegenc.c(416):
  warning C4133: '=': incompatible types - from 'GstFlowReturn (__cdecl *)(GstVideoEncoder *,GstVideoCodecFrame *)' to
  'gboolean (__cdecl *)(GstVideoEncoder *,GstVideoCodecFrame *)'

../subprojects/gst-plugins-bad/ext/openjpeg/gstopenjpegenc.c(418):
  warning C4133: '=': incompatible types - from 'GstFlowReturn (__cdecl *)(GstVideoEncoder *,GstVideoCodecFrame *)' to
  'gboolean (__cdecl *)(GstVideoEncoder *,GstVideoCodecFrame *)'

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1378>

rtpfunnel: fix extmap handling on accept-caps

Follow-up on 97d83056b315c56834eaa6776ae4c6a0848b5ef9, only check
for intersection with the current srccaps when checking if a sinkpad
can accept caps.

I must have been lucky in my firefox testing then, and always entered
the code path with audio getting negotiated first, thus not failing
the is_subset check when srccaps had been negotiated as
application/x-rtp, and an accept-caps query was made for the video
caps with a defined extmap.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1384>

tutorials: Fix typos

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1382>

gssink: add metadata property

This property can be used to set metadata on the storage object.

Similar API has been added to the S3 sink already, see
https://gitlab.freedesktop.org/gstreamer/gst-plugins-rs/-/merge_requests/613

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1377>

basesrc: Add annotation to virtual methods with (out) parameters

This allows to actually use these virtual methods from the GObject introspection.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1376>

d3d11: Update comments

Remove copy & paste mistake (this is not GstGL) and add more
description.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1374>

vapostproc, vadeinterlace: don't transform caps if no intersection.

If caps to transform don't intersect with those supported by the VA
filter (VAEntrypointVideoProc) then return them as is, because only
pass-through mode is the only possibility.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1369>

vapostproc: Append featured caps rather than merge.

So it would be possible to honor upstream preference.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1369>

vapostproc: Remove dead code.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1369>

va: filter: Validate input parameter in internal function.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1369>

va: allocator: log drm modifier

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1369>

va: vpp: Fix the memory leak in fixate_caps().

For the BaseTransform class, the function of fixate_caps(), takes
the ownership of "othercaps". So we should clear it in our subclass.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1372>

id3v2mux: Map GST_TAG_MUSICBRAINZ_RELEASETRACKID

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1342>

id3v2mux: Map GST_TAG_MUSICBRAINZ_RELEASEGROUPID

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1342>

ci: fix minor comment typo

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1371>

player: Ensure the GstPlay is created before the wrapped renderer

The GstPlayerWrappedVideoRenderer implicitely depends on GstPlay.

Fixes #878

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1345>

play: Allow runtime configuration of video-renderer

This is a requirement for GstPlayer when using the default overlay interface
provided by the pipeline. The GstPlayerWrappedVideoRenderer requires a valid
pipeline, but that's available only after the GstPlay thread has successfully
started.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1345>

meson: Disable symlink to gst modules

Symlink to directory usually makes IDE be confused,
and also any git command to the symlink would not work.
Disable the symlink since we don't see any advantage of the use case
at the moment.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/949>

va: decoder: Also ref the display when duplicating pictures.

The _destroy_buffers() will check the display handle using the
g_return_val_if_fail. we should not generate the invalid pointer
warning.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1368>

docs: Update doc cache for Windows specific plugins

Updating doc cache for d3d11, mediafoundation and wasapi2 plugins

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1360>

wasapi2: Fix typo in doc

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1360>

mediafoundation: Skip doc for non-default encoder elements

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1360>

d3d11: Stop doc for non-default decoder and deinterlacer elements

Just skip doc for non-default decoder/deinterlacer elements
since there are multiple element in case that system has
multiple GPUs.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1360>

gst: Add APIs to allow documentation for element to be skipped

Dynamically registered elements (hardware element in most cases)
may or may not be available on a system and properties may be different
per system.
This new API will make documentation skipping possible in programmable way.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1360>

d3d11: Fix deadlock while doing unprepare

ShowWindow() could be blocked while doing gst_d3d11_window_win32_unprepare
when external window handle provided to d3d11videosink in multi-threaded
environment.
The condition that issue happened is, UI thread is waiting for a
background thread that changes d3d11videosink state to NULL, and the
background thread would try to send a window message to the queue.
The queue is already occupied by the UI thread, so the background
thread will be blocked.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1366>

tcp: fix build on Solaris

Add missing header.

From Claes Nästén via http://gnats.netbsd.org/56509

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1364>

shout2: Add compatibility for libshout >= 2.4.2

In libshout >=2.4.2 shout_open() can return SHOUTERR_RETRY in addition
to SHOUTERR_BUSY.

The nonblocking example in libshout fixes the problem in a similar
way, as mentioned by the author in this issue:
https://gitlab.xiph.org/xiph/icecast-libshout/-/issues/2316

Fixes https://gitlab.freedesktop.org/gstreamer/gst-plugins-good/-/issues/848

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1363>

vaapi: libs: Use unsized arrays as parameters.

Instead of defining a sized array for function signature, use it
unsized (a pointer alias, basically). In this way clang warning is
silenced:

warning: ‘fill_profiles’ accessing 64 bytes in a region of size 12 [-Wstringop-overflow=]

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1357>

vaapi: meson: Fail if static build.

And initialize the plugin array.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1357>

env: Fix deprecations from python 3.10

distutils is now deprecated and strtobool is simple enough for us to just
vendor.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1358>

python: Avoid treating float as int

Since python 3.10 implicit conversion to integers using `__int__` as
been completely removed (was deprecated behavior in 3.9) so we need
to cleanly handle it now.

See https://gitlab.gnome.org/GNOME/pitivi/-/issues/2589

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1358>

vaapipostproc: fix mising metadata when using system

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1325>

qmlglsink: fix another resize case

If qt asks us to redraw before we have both set a buffer and caps we
would attempt to use the new caps with the old buffer which could result
in bad things happening.

Only update caps from new_caps once the buffer has actually been set.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1346>

wpevideosrc: Fix frame stuttering in GL rendering path

Make sure the EGLImage we're rendering to the GL memory stays alive long enough,
until the the GL memory has been destroyed.

This change fixes tearing and black flashes artefacts that were happening
because the EGLImage was sometimes destroyed before the sink actually rendered
the associated texture.

Fixes #889

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1354>

wpevideosrc: Run through gst-indent

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1354>

gstinfo: Add gst_debug_log_literal() function

This takes a plain message string and not a format string, and as a
result doesn't have to be passed through vasprintf() and lead to further
unnecessary allocations. It can also contain literal `%` because of
that.

The new function is mostly useful for bindings that would have to pass a
full string to GStreamer anyway and would do formatting themselves with
language-specific functionality.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1356>

v4l2: Update fmt if padded height is greater than fmt height

If padded height is greater, buffer bytesused could be larger than plane length,
and cause VIDIOC_QBUF failure.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1355>

uridecodebin3: Nullify current item after all play items are freed.

There's a potential race condition with this sort of pipelines on
certain systems (depends on the processing load):

GST_DEBUG_DUMP_DOT_DIR=/tmp \
gst-launch-1.0 uridecodebin3 uri=file://stream.mp4 ! glupload ! \
glimagesink --gst-debug=*:4

Right after the pipeline passes from PAUSED to READY, bin_to_dot_file
dumps uridecodebin3 properties, but current uri and suburi might be
already freed, causing a potential use-after-freed.

This patch makes NULL the current item right after all the play items
are freed.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1353>

gst: Fix license headers and add SPDX

Fixes https://gitlab.freedesktop.org/gstreamer/gst-python/-/issues/57

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1351>

caps: fix type of return value if string is null in gst_caps_from_string

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1348>

rtpfunnel: don't enforce twcc during upstream negotiation

A previous patch has caused rtpfunnel to output twcc-related
information downstream, however this leaked into upstream
negotiation (through funnel->srccaps), causing payloader to
negotiate twcc caps even when not prompted to do so by the user.

Fix this by only enforcing that upstream sends us application/x-rtp
caps as was the case originally.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1278>

rtptwcc: complete bufferlist fix

When dealing with bufferlists, we need to store one "SentPacket"
structure per buffer, not one per buffer list!

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1278>

qtdemux: Log cslg_shift that was determined

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1294>

qtdemux: Use a composition time offset of 0 for "no decode samples" for the time being

This needs codec-specific handling, but using 0 instead of G_MININT32 at
least gives somewhat reasonable behaviour.

See https://gitlab.freedesktop.org/gstreamer/gstreamer/-/issues/883

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1294>

qtdemux: Always check ctts for unreasonably large offsets

If this happens then ignore the whole ctts. Previously we only did this
if the PTS/DTS shift was determined from the ctts instead of the cslg.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1294>

qtdemux: Dump composition time offsets in trun as signed integers

Just like we do for ctts without regard of the version of the box.
Huge offsets are interpreted as negative offsets by qtdemux so this
works.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1294>

qtdemux: Add a comment why only positive cslg shifts are considered

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1294>