textrender: Negotiate caps on a GAP event if none were negotiated yet

Otherwise downstream wouldn't have received a segment event either and
wouldn't know what to do with the gap event

And also forward any pending segment event.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3541>

h265decoder: Do not abort when failed to prepare ref pic set

Currently the element calls abort when failed to prepare reference
picture set. This can happent when the input stream is somehow
corrupted, like a rtsp strem with lost packets. Now it will only
return with GST_FLOW_ERROR instead of terminating whole process.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3505>

meson: fix check for pthread_setname_np()

Need to define _GNU_SOURCE.

Fixes #1542

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3538>

dvbsubenc: Forward GAP events as-is if we wouldn't produce an end packet and are not in the middle of an existing subtitle

An end packet is only produced once for the last subtitle, so multiple
GAP events between subtitles would result only in a single end packet
and nothing else otherwise. This would potentially starve downstream
then, so instead forward the GAP events in that case.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3534>

ci: build less for integration testsuite

- skip gst-omx
- skip sharp bindings
- skip examples and gst-examples
- skip check unit tests (only needed for check job)
- skip microdns (not needed and pulls in subproject)
- skip avtp (ditto)
- skip webrtc (same)
- skip benchmarks
- skip qt5 and gtk

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3520>

examples: webrtc: fix plugins check

`videoconvert` and `videoscale` are now part of the `videoconvertscale`
plugin, see d11f13f476411b828387c3c26619bc77c255affb

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3529>

directshow: Fix build error with glib 2.75 and newer

Starting with glib 2.75, `NULL` is `nullptr`, which cannot be
implicitly coerced to `0`, unlike `NULL`. So explicitly pass `0`.

```
[3206/4524] Compiling C++ object subprojects/gst-plugins-bad/sys/directshow/gstdirectshow.dll.p/dshowvideosink.cpp.obj
FAILED: subprojects/gst-plugins-bad/sys/directshow/gstdirectshow.dll.p/dshowvideosink.cpp.obj
"cl" "-Isubprojects\gst-plugins-bad\sys\directshow\gstdirectshow.dll.p" "-Isubprojects\gst-plugins-bad\sys\directshow" "-I..\subprojects\gst-plugins-bad\sys\directshow" "-Isubprojects\gst-plugins-bad" "-I..\subprojects\gst-plugins-bad" "-Isubprojects\gst-plugins-base\gst-libs" "-I..\subprojects\gst-plugins-base\gst-libs" "-Isubprojects\gstreamer\libs" "-I..\subprojects\gstreamer\libs" "-Isubprojects\gstreamer" "-I..\subprojects\gstreamer" "-Isubprojects\orc" "-I..\subprojects\orc" "-I..\subprojects\gst-plugins-bad\sys\directshow\strmbase\baseclasses" "-Isubprojects\gst-plugins-base\gst-libs\gst\video" "-Isubprojects\gstreamer\gst" "-Isubprojects\gst-plugins-base\gst-libs\gst\audio" "-Isubprojects\gst-plugins-base\gst-libs\gst\tag" "-IC:/gst-install/include/glib-2.0" "-IC:/gst-install/lib/glib-2.0/include" "-IC:/gst-install/include" "/MD" "/nologo" "/showIncludes" "/utf-8" "/W2" "/EHsc" "/O2" "/Zi" "/wd4018" "/wd4146" "/wd4244" "/wd4305" "/utf-8" "/we4002" "/we4003" "/we4013" "/we4020" "/we4027" "/we4029" "/we4033" "/we4045" "/we4047" "/we4053" "/we4062" "/we4098" "/we4101" "/we4189" "/utf-8" "-D_MBCS" "/wd4189" "/wd4456" "/wd4701" "/wd4703" "/wd4706" "/wd4996" "-DHAVE_CONFIG_H" "/Fdsubprojects\gst-plugins-bad\sys\directshow\gstdirectshow.dll.p\dshowvideosink.cpp.pdb" /Fosubprojects/gst-plugins-bad/sys/directshow/gstdirectshow.dll.p/dshowvideosink.cpp.obj "/c" ../subprojects/gst-plugins-bad/sys/directshow/dshowvideosink.cpp
../subprojects/gst-plugins-bad/sys/directshow/dshowvideosink.cpp(62): warning C5051: attribute 'noinline' requires at least '/std:c++20'; ignored
../subprojects/gst-plugins-bad/sys/directshow/dshowvideosink.cpp(123): error C2664: 'LRESULT SendMessageA(HWND,UINT,WPARAM,LPARAM)': cannot convert argument 3 from 'nullptr' to 'WPARAM'
../subprojects/gst-plugins-bad/sys/directshow/dshowvideosink.cpp(123): note: A native nullptr can only be converted to bool or, using reinterpret_cast, to an integral type
C:\Program Files (x86)\Windows Kits\10\include\10.0.19041.0\um\winuser.h(3690): note: see declaration of 'SendMessageA'
../subprojects/gst-plugins-bad/sys/directshow/dshowvideosink.cpp(635): error C2664: 'BOOL SystemParametersInfoA(UINT,UINT,PVOID,UINT)': cannot convert argument 2 from 'nullptr' to 'UINT'
../subprojects/gst-plugins-bad/sys/directshow/dshowvideosink.cpp(635): note: A native nullptr can only be converted to bool or, using reinterpret_cast, to an integral type
C:\Program Files (x86)\Windows Kits\10\include\10.0.19041.0\um\winuser.h(13153): note: see declaration of 'SystemParametersInfoA'
../subprojects/gst-plugins-bad/sys/directshow/dshowvideosink.cpp(1593): error C2664: 'LRESULT SendMessageA(HWND,UINT,WPARAM,LPARAM)': cannot convert argument 3 from 'nullptr' to 'WPARAM'
../subprojects/gst-plugins-bad/sys/directshow/dshowvideosink.cpp(1593): note: A native nullptr can only be converted to bool or, using reinterpret_cast, to an integral type
C:\Program Files (x86)\Windows Kits\10\include\10.0.19041.0\um\winuser.h(3690): note: see declaration of 'SendMessageA'
```

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3528>

gstreamer-full: use the basename of plugin_path to avoid the ':' detection

The absolute path on windows contains ':' which prevents
gstinitstaticplugins.py to work properly. Use the basename whic is good
enough for the script to make the list of plugins

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3526>

adaptivedemux2: Don't allow stream selection while switching periods

The stream selection is done on the currently outputting tracks, but in order to
(de)activate the backing streams we can only do it if the input and output
period are identical.

Fixes crash when doing stream selection during period migration

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3525>

gstinfo: Minor modification to avoid gst-indent pain

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3483>

multiqueue: Use new id-based debugging methods

Clarifies the debug logs

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3483>

gstinfo: Allow passing a string identifier for debugging

This adds "id" variants to most debugging functions, and allows providing a
string identifier instead of a GObject.

This allows providing unified and clearer debug logs for all the
non-gobject-based items, and opens the way for more unified logging.

As an extension, copying the object name is avoided as much as possible, by
using it directly instead of going through another copy.

* API : gst_debug_message_get_object_id

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3483>

Back to development

Release 1.21.3

Remove ChangeLog files from git repository

This information is tracked fully in the git repository, so
no point having the ChangeLog duplicate it, and it interferes
with grepping the repository.

We are going to create the ChangeLogs on the fly when generating
tarballs going forward (with a limited history), since it's still
valuable for tarball consumers to be able to easily see a list of
recent changes.

Fixes https://gitlab.freedesktop.org/gstreamer/gstreamer-project/-/issues/73

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3521>

meson: Generate ChangeLog files for release tarballs on dist

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3521>

flacparse: Fix handling of headers advertising 32bps

According to the flac bitstream format specification, the sample size in bits
corresponding to `111` is 32 bits per sample.

https://xiph.org/flac/format.html#frame_header

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3517>

v4l2src: Fix crash in renegotiation

This regression was introduce by fix for making buffer pool thread safe. When
we renegotiate, the pool will be setup after we set the format. But the code
has been simplified to only get the pool once before, which caused a null
pointer deref.

Fixes 94ba019 ("v4l2: Fix SIGSEGV on 'change state' during 'format change'")
Related to !3481
Fixes #1626

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3513>

Change name of property from Exists to Availability

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3510>

ges: Add API to disable timeline coherence checks

There are cases where user might want to be in full control of the
timeline and not be limited by the checks that are being done by GES
to go from one timeline layout to another, this should be doable as
it is a valid use case.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3501>

d3d11av1dec: Promote rank to primary + 1

... so that this element can have higher rank than the other software
AV1 decoders

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3495>

git: Show all suggestions on pre-commit hook

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3506>

uridecodebin3: Protect against NULL uri/suburi

Fixes #1625

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3511>

README: Add section how to build and visualize documentation

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3442>

meson: Add toplevel "gst-doc" alias target

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3442>

meson: Add doc directory to XDG_DATA_DIRS

gst-env.py does it already, but it was missing from meson devenv.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3442>

multiqueue: Handle gapless with flushing

Don't reset the stream-start group-id when stop/pausing single queues. They are
only resetted when re-used (in READY->PAUSED).

Fixes #1586

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3487>

uridecodebin3: Always store pending buffering messages

Fixes #1586

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3487>

vajpegdec: Reenable element negotiation.

negotiation vmethod were overwritten by vabasedec, leading to errors.

This was a regression of commit b6538e0560.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3509>

gstinfo: Optimize color escape code creation

When coloring is in use, those escape codes are going to be created many times
for almost all debug lines.

Don't create plenty of temporary allocations, and instead build the escape code
ourselves statically

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3498>

webrtc: Fix possible use-after-free of GstWebRTCICETransport

Because of the asynchronous resolving of mDNS ICE candidates it is
possible that GstWebRTCICE outlives webrtcbin. This in turn prolongs
the lifetime of the GstWebRTCNiceStream objects via refs in
nice_stream_map. Thus the GstWebRTCICETransport objects held in
GstWebRTCNiceStream may be invalid at the time they are accessed by
the _on_candidate_gathering_done() callback since GstWebRTCNiceStream
doesn't take a reference to them. Doing so would create a circular
reference, so instead this commit introduces weak references to the
transport objects and then we can check if the objects are valid before
accessing them.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3502>

rtspsrc: fix seek event leaks

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3500>

va: Handle input caps change.

Update output caps if it's notified by baseclass

See https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3328

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3480>

vaav1dec: Use gst_va_base_dec_set_output_state().

And even that vaav1dec doesn't use vabasedec negotiate vmethod, it should align
with the new scheme of using base's width & height for surface size and
output_info structure for downstream display size negotiation.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3480>

vavp9dec: Use gst_va_base_dec_set_output_state().

As this element reopen the internal decoder differently, it only uses the helper
function to negotiate.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3480>

vampeg2dec: Streams are progressive by default.

By initializating progressive, then interlaced streams are detected correctly.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3480>

va: Add and use common decode negotiate vmethod.

This vmethod can be used by decoders with the same VA decoder reopen logic:
same profile, chroma, width and height.

Also a new public method called gst_va_base_dec_set_output_state() with the
common GStreamer code for setting the output state, which is always called by
the negotiate vmethod.

In order to do this refactoring, new variables in vabasedec have to be populated
by the decoders:

* width and height define the resolution set in VA decoder. In the case of H264
  would be de coded_width and codec_height, or max_width and max_height in AV1.
* output_info is the downstream video info used for negotiation in
  gst_va_base_dec_set_output_state().
* input_state, from codec parent class shall be also held by vabasedec

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3480>

vaav1dec: Use gst_va_base_dec_prepare_output_frame().

And simplify a bit the code flow.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3480>

va: Add and use gst_va_base_dec_prepare_output_frame().

This helper will do downstream negotiation and later will
allocate the output frame.

H265 and AV1 decoders don't use this approach since their output
frame allocation is different.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3480>

va: Remove last_ret error handling in decoders.

It was used in the early development of the base classes. Now it
shouldn't be needed.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3480>

va: Add and use gst_va_base_dec_process_output().

This function will copy the frame, if it's needed, and will apply buffer flags.

The function is used by all the decoders.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3480>

va: Fix the caps memory leak by gst_va_pool_new_with_config().

The gst_va_pool_new_with_config() will ref the caps, and so we need
to unref after that.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3503>

va: Add render node name in non-first devices.

There could be multi-GPU setups where the non-first has more
entrypoints than the first one, and the elements names are not
homogeneous, leading to pipeline building error.

This patch add the render node in the elements names when they belong
to the non-first device.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3491>

vafilter: Increase the caps for HDR.

As they might be other medatadata types.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3473>

vafilter: Increase the number of 3DLUT caps to 16.

To fix the warning on Alderlake

vafilter gstvafilter.c:534:gst_va_filter_ensure_filters:<vafilter0>
vaQueryVideoProcFiltersCaps: list argument exceeds maximum number

Increase the number of caps to 16 as vadumpcaps does.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3473>

qt: deactivate context if fill_info fails

Now the OpenGL context is deactivated if call to gst_gl_context_fill_info()
fails in gst_qt_get_gl_wrapcontext(), preventing that the context is left
activated, which could lead to invalid memory reads.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3492>

av{aud,vid}dec: Report decoding errors to the base class

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1889>

v4l2: Fix SIGSEGV on 'change state' during 'format change'

Ensure all access to v4l2object->pool imply taking a lock and a hard ref on the pool

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3481>

gst-inspect: Don't leak list

Just iterate the list instead of trying to be smart...

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3497>

example: vaenc-dynamic-reconfigure: Support H265.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/2036>

va: Add H265 SCC profile support.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/2036>

va: Add extended formats support such as 10/12 bits, 4:2:2 and 4:4:4.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/2036>

va: enable multi tile support for H265 encoder.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/2036>

va: enable vah265lpenc for low power mode H265 encoder.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/2036>

va: Add the low-delay-b frame support for H265.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/2036>

va: Add prediction direction attribute support for H265 encoder.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/2036>

va: Register and enable and the vah265enc plugin.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/2036>

va: Implement the vah265enc plugin for va HEVC encoding.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/2036>

opusdec: Use proper guint/guint8 type conversion

Do not cast, that might yield wrong results.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3494>

opusdec: Negotiate default to 2 channels

In that place, dec->n_channels can still theoretically be 0. Default to
2 in that case.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3494>

opusenc: Reverse channel order in template caps

We want to make it so that we prefer a higher, not lower, number of
channels. Otherwise, this pipeline would convert from 2 to 1 channels:

gst-launch-1.0 audiotestsrc ! audio/x-raw,channels=2 ! opusenc ! queue ! opusdec ! queue ! opusenc ! fakesink

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3494>

avviddec: Report flow error when decoder refused packet

In cases where an invalid input packet is submitted to the decoder we emit a
warning but reporting the flow error upstream would also be useful. This came up
with a case were the application interacts directly with the decoder, using a
mechanism similar to GstHarness.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3463>

audiodecoder: Make data processing errors non-fatal by default

The previous default value of `max-errors` was too small and would potentially trigger the
decoder to emit errors too often for most cases.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3478>

videodecoder: Make data processing errors non-fatal by default

The previous default value of `max-errors` was too small and would potentially trigger the
decoder to emit errors too often for most cases.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3478>

sdpmessage: Annotate SDP message parameters for `parse_uri()` and `parse_buffer()` correctly

They are not actually `out` parameters but must be allocated and
initialized to a valid SDP message by the caller. Just allocating them
without initialization will cause memory corruptions because the
functions will try to clear/append to the existing SDP message.

As such they should be just marked as `transfer none`.

Fixes https://gitlab.freedesktop.org/gstreamer/gstreamer/-/issues/1605

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3484>

mfvideosrc: Fix buffer leak

The allocated buffer should be released

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3479>

mediafoundation: Chain up from GObject::constructed

... so that GstTracer can trace it

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3479>

d3d11: Use correct ref/unref methods

Those objects are GstObject subclasses

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3479>

sdp: use g_strdup instead of strdup

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3475>

glimagesink: Fix render rect assertion

Whenever the surface is resized before the stream is negotiated, we endup
with an assertion in libgstvideo.

  gst_video_center_rect: assertion 'src->h != 0' failed

This fixes it, by following the style aready in place, which is to ensure
surfaces have a minimum size of 1x1.

Fixes #1139

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3467>

audioconvert, audioresample, audiofilter: fix divide by 0 for input buffer without caps

gst-launch-1.0 audiotestsrc ! udpsink host=127.0.0.1
gst-launch-1.0 udpsrc ! audioconvert ! autoaudiosink

would crash with a floating point exception when clipping the input
buffer owing to a division by zero because no caps event was received.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3469>

win32ipcvideosrc: Fix property name and enum value mismatch

Make them consistent

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3465>

win32ipcvideosrc: Protect pipe from flush thread

The pipe object must be protected against GstBaseSrc::unlock()
thread.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3465>

h264parser: Fix a typo in pred_weight_table parsing.

When setting default values, the reference list number of l1 is wrong.

Fix: https://gitlab.freedesktop.org/gstreamer/gstreamer-vaapi/-/issues/336
Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3464>

msdkdec: Update decoding pts

Update frame pts before calling gst_video_decoder_finish_frame, or frames may be lost when transcoding in specific stream

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3449>

Install meson from git when MESON_COMMIT variable is set

When starting manually a CI pipeline with MESON_COMMIT variable defined,
install the specified version of Meson. This can be used to help the
Meson project smoke testing RC releases or investigate eventual
regressions.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3036>

win32ipc: Add WIN32 shared memory videosrc/sink elements

Windows supports various IPC methods but that's completely
different form that of *nix from implementation point of view.
So, instead of adding shared memory functionality to existing
shm plugin, new WIN32 shared memory source/sink elements
are implemented in this commit.

Each videosink (server) and videosrc (client) pair will communicate
using WIN32 named pipe and thus user should configure unique/proper
pipe name to them (e.g., \\.\pipe\MyPipeName).
Once connection is established, videosink will create named shared memory
object per frame and client will be able to consume the object
(i.e., memory mapped file handle) without additional copy operation.

Note that implementations under "protocol" directory are almost
pure C/C++ with WIN32 APIs except for a few defines and debug functions.
So, applications can take only the protocol part so that the application
can send/receive shared-memory object from/to the other end
even if it's not an actual GStreamer element.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3441>

rtpsession: Support disabling late adjustment of ntp-64 header ext

Currently in rtp_session_send_rtp(), the existing ntp-64 RTP header
extension timestamp is updated with the actual NTP time before sending
the packet. However, there are some circumstances where we would like
to preserve the original timestamp obtained from reference timestamp
buffer metadata.

This commit provides the ability to configure whether or not to update
the ntp-64 header extension timestamp with the actual NTP time via the
update-ntp64-header-ext boolean property. The property is also exposed
via rtpbin. Default property value of TRUE will preserve existing
behavior (update ntp-64 header ext with actual NTP time).

Fixes https://gitlab.freedesktop.org/gstreamer/gstreamer/-/issues/1580

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3451>

add new plugin for Qt 6 rendering inside a QML scene

- Based heavily on the existing Qt5 integration however:
  - The sharing of OpenGL resources is slightly different
  - The integration with the scengraph is a bit different
- Wayland, XCB and KMS have been smoke tested.  Android, MacOS/iOS,
  Windows may or may not work.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3281>

mfvideosrc: check HRESULT of CreateClassEnumerator correctly

Fixes a crash during direct show device enumeration

Fixes: https://gitlab.freedesktop.org/gstreamer/gstreamer/-/issues/1599
Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3460>

v4l2: bypass check some transfer types in colorimetry

v4l2 will report fail for some streams whose colorimetry value such as 2:4:8:3.
Can bypass check these transfer types in colorimetry to avoid error.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3440>

docs/design: Add document detailing the new gapless/instant-uri changes

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3457>

uridecodebin3: propagate about-to-finish for new inputs

If the pending next urisourcebin is already draining, make sure we propagate it
when activating it.

Fixes gapless playback of small entries

Fixes https://gitlab.freedesktop.org/gstreamer/gstreamer/-/issues/1588

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3457>

uridecodebin3: Remove old fixme

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3457>

(uri)decodebin3: Ensure group-id consistency

Make sure that group-id of a given play item are made consistent from the
start (sources) and all the way through the output.

This ensures that we can reliably detect that we have switched to the next play
item on the output of decodebin3 (and we can therefore properly free/release it)

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3457>

uridecodebin3: Fix shutdown procedures in probe

When shutting down, we want to remove the urisourcebin blocking probes ... but
we also want to propagate a GST_FLOW_FLUSHING upstream (and not
GST_FLOW_NOT_LINKED) to make the upstream task gracefully stop instead of
posting an error message.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3457>

decodebin3: Properly reset when going back to READY

Clear the remaining stream-related fields when going from PAUSED to READY, and
use when disposing.

Fixes various issues when re-using decodebin3/playbin3

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3457>

decodebin3: Don't output bogus GST_MESSAGE_STREAMS_SELECTED

When `is_selection_done` is called, it checks that all the requested streams are
present in the active stream list ...

... except there could very well be a (about to be removed) stream from the
previous selection present.

Therefore filter the list of streams we add to the message by the streams which
are actually requested.

Fixes issues when switching between different stream types (ex: video-only to
audio-only).

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3457>

Use the correct SSRC(s) when routing a RTCB FB FIR

Previously we tried to route an incoming RTCP FB FIR to the correct ssrc
using the "media source" component of the RTCP FB message. However,
according to RFC5104 (section 4.3.1.2) the "media source" SHALL be set
to 0. Instead the ssrc(s) in use are propagated via the FCI data. Now
a specific GstForceKeyUnit event is sent for every ssrc.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3292>

rtpsource: Track the seqnum for senders

RTP source statistics are tracked for local senders by
treating them as a receiver of their own outbound packets.

Accordingly, track the highest packet seqnum so that the
packets-lost calculation generates a sensible number instead
of always reporting -$number_of_packets_sent

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3454>

adaptivedemux2: Add GStreamer to the deps list

Explicitly dep on GStreamer so as not to accidentally
link to the system version in a git build

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3453>

kmssink: Fix compilation without kernel headers

There was a drm/drm_mode.h included added recently, drm/ is usually
referencing the linux kernel header, but we only requires the libdrm
headers to be installed. On top of this, including drm_mode.h is never
needed as its already included by drm.h.

Fixes #1596

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3452>

onnx: Update to OnnxRT >= 1.13.1 API

- Replace deprecated methods
- Add a check on ORT version we are compatible with.
- Add clarification to the example given.
- Add the url to retrieve the model mentioned in the example.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3388>

h265parse: Add the missing timestamp when splitting a frame.

When splitting a frame, the gst_buffer_copy_region() does not copy
the timestamp correctly for sub frames when the offset is not 0.
We still need those timestamps for each output sub frame.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3448>

h264parse: Add the missing timestamp when splitting a frame.

When splitting a frame, the gst_buffer_copy_region() does not copy
the timestamp correctly for sub frames when the offset is not 0.
We still need those timestamps for each output sub frame.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3448>

dvbsubenc: Write Display Definition Segment if a non-default width/height is used

Otherwise it can't be rendered by dvbsuboverlay or ffmpeg at least.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3446>

inputselector: Add drop-backwards property

When sync-streams=true, drop backwards buffers on pad switch.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3256>

inputselector: Fix waiting on sync-mode=clock

Basically copy over what clocksync does, but taking into account that we
have multiple upstream latencies.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3256>

av1dec: Demote rank to secondary

cerbero does not build this plugin for now, and there's altanative
dav1ddec

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3287>

rtspsrc: Don't replace 404 errors with "no auth protocol found"

When getting a "404 Not Found" response from the DESCRIBE request, the
source produced a "No supported authentication protocol was found" error
instead of passing on the 404, which was confusing.

Only produce this error message when we're handling a response of "401
Unauthorized" without a compatible WWW-Authenticate header.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3414>