Commit graph

23 commits

Author SHA1 Message Date
Matthew Waters
98249a57db gst: don't use volatile to mean atomic
volatile is not sufficient to provide atomic guarantees and real atomics
should be used instead.  GCC 11 has started warning about using volatile
with atomic operations.

https://gitlab.gnome.org/GNOME/glib/-/merge_requests/1719

Discovered in https://gitlab.freedesktop.org/gstreamer/gst-plugins-good/-/issues/868

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-base/-/merge_requests/1073>
2021-03-19 04:20:19 +00:00
Stéphane Cerveau
967e650937 meson: update glib minimum version to 2.56
In order to support the symbol g_enum_to_string in various
project using GStreamer ( gst-validate etc.), the glib minimum
version should be 2.56.0.

Remove compat code as glib requirement
is now > 2.56

Version used by Ubuntu 18.04 LTS

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-base/-/merge_requests/874>
2020-10-15 18:20:37 +02:00
Sebastian Dröge
5bfb438d3b video-anc: Implement transform functions for AFD/Bar metas
If the transformation is just a copy, copy over the metadata. For AFD
also copy over the metadata if the aspect ratio stays the same in
scaling transformations. In all other cases fail the transformation.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-base/-/merge_requests/791>
2020-09-09 07:48:02 +00:00
Stéphane Cerveau
c7a956aede video-anc: init type before g_once_init_enter
Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-base/-/merge_requests/675>
2020-05-27 17:13:35 +02:00
Sebastian Dröge
98bb7d0c2e video-anc: Register an init function for Bar meta
The init function is mandatory and we keep around uninitialized memory
otherwise.

Fixes https://gitlab.freedesktop.org/gstreamer/gst-plugins-base/-/issues/747
2020-04-19 18:29:18 +03:00
Sebastian Dröge
2bba48c9b5 video-anc: Fix ADF detection when trying to extract data from vanc
Previously we were checking offset 1 twice, but the second check
should've been for offset 2.
2019-08-07 13:01:07 +03:00
Roman Sivriver
2b25862973 video-and: Fix buffer overflow detected by asan
gst_meta_api_type_register() assumes that the last tags element is null, but it wasn't

==17422==ERROR: AddressSanitizer: global-buffer-overflow on address 0x7f4e2a67c998 at pc 0x7f4e2a0c92ac bp 0x7ffcc41f80b0 sp 0x7ffcc41f80a0
READ of size 8 at 0x7f4e2a67c998 thread T0
    #0 0x7f4e2a0c92ab in gst_meta_api_type_register ../subprojects/gstreamer/gst/gstmeta.c:94
    #1 0x7f4e2a5582c3 in gst_video_afd_meta_api_get_type ../subprojects/gst-plugins-base/gst-libs/gst/video/video-anc.c:1146
    #2 0x404c7c in invoke_get_type (/home/ubuntu/gst-build/build/tmp-introspect5gv1rovo/GstVideo-1.0+0x404c7c)
    #3 0x406b5c in dump_irepository (/home/ubuntu/gst-build/build/tmp-introspect5gv1rovo/GstVideo-1.0+0x406b5c)
    #4 0x407089 in main (/home/ubuntu/gst-build/build/tmp-introspect5gv1rovo/GstVideo-1.0+0x407089)
    #5 0x7f4e295b4b6a in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x26b6a)
    #6 0x404479 in _start (/home/ubuntu/gst-build/build/tmp-introspect5gv1rovo/GstVideo-1.0+0x404479)

0x7f4e2a67c998 is located 40 bytes to the left of global variable 'tags' defined in '../subprojects/gst-plugins-base/gst-libs/gst/video/video-anc.c:1232:25' (0x7f4e2a67c9c0) of size 24
0x7f4e2a67c998 is located 0 bytes to the right of global variable 'tags' defined in '../subprojects/gst-plugins-base/gst-libs/gst/video/video-anc.c:1141:25' (0x7f4e2a67c980) of size 24
SUMMARY: AddressSanitizer: global-buffer-overflow ../subprojects/gstreamer/gst/gstmeta.c:94 in gst_meta_api_type_register
2019-06-17 22:03:34 -04:00
Aaron Boxer
f6fa444f04 video-anc: add AFD/Bar support 2019-05-02 19:59:29 +00:00
Sebastian Dröge
cbccda6f3b video-anc: Handle SD formats correctly
VANC is stored linearly in SD formats instead of separating the Y and YV
components from each other and having first all Y and then all UV
values.
2019-04-23 11:25:05 +00:00
Aaron Boxer
a397a36b75 video-anc: revert "add support for Bar and AFD meta-data"
This reverts commit 8759c36851.
GstMeta may not be the appropriate vehicle for this information
2019-04-10 16:09:19 -04:00
Aaron Boxer
8759c36851 video-anc: add support for Bar and AFD meta-data 2019-04-07 14:58:42 -04:00
Andrew Gall
3a9148b334 video-anc: Fix glib version check for G_GNUC_CHECK_VERSION macro
Fixes #544
2019-01-29 13:58:43 +02:00
Sebastian Dröge
fd1a31ee11 video-anc: Add API for converting GstVideoCaptionType from/to GstCaps 2018-12-15 21:31:14 +00:00
Sebastian Dröge
1eb3a20617 video-anc: Replace GST_VIDEO_CAPTION_TYPE_CEA608_IN_CEA708_RAW with CEA608_S334_1A
CEA608_IN_CEA708_RAW is the same format as CEA708_RAW. It's only
difference is that it must contain only CEA608 and a format like this
does not exist in practice. In practice every element that handles raw
cc_data triplets must check each triplet for their actual content and
handle them accordingly.

For CC-only streams a parser could signal the existence of CEA608 and/or
CEA708 inside the caps but for metas this can only potentially be
signalled via the ALLOCATION query for negotiation purposes.

A separate format for this is not very useful and instead it should be a
format qualifier.

CEA608_S334_1A is the format defined by SMPTE S334-1 Annex A and which
is used for transferring CEA608 over SDI instead of CEA708 CDP packets.
2018-12-15 21:31:14 +00:00
Sebastian Dröge
db1722c9cb video-anc: G_GNUC_CHECK_VERSION was added in GLib 2.42
Define our own version if compiling with older versions. We currently
only require GLib 2.40.
2018-11-28 13:06:35 +00:00
Sebastian Dröge
6e9c71e6c1 video-anc: Implement a VBI encoder
This allows writing out data from caption meta and similar to VBI
2018-11-12 14:09:28 +00:00
Sebastian Dröge
369c79abd3 video-anc: Add comment about our assumption of the ADF user data format
We assume here the same data format for the user data as for the
DID/SDID: 10 bits with parity in the upper 2 bits. In theory some
standards could define this differently and even have full 10 bits of
user data but there does not seem to be a single such standard after
all these years.
2018-11-12 13:14:57 +00:00
Sebastian Dröge
932e9f5eee video-anc: Add support for parsing composite ADF and check the packets' checksum
And add the checksum to the data we test in the unit test.
2018-11-12 13:14:57 +00:00
Sebastian Dröge
eac38b47d4 video-anc: Add invalid-argument guards to public GstVideoVBIParser API 2018-11-12 13:14:57 +00:00
Sebastian Dröge
4666444955 video-anc: Fix bounds checks when parsing VBI data
We were reading more bytes than we allocated.

https://bugzilla.gnome.org/show_bug.cgi?id=797363
2018-11-01 19:30:41 +02:00
Mark Nauwelaerts
c93eda31d9 video: fix some GIR annotations
Mostly related to out and array parameters
2018-04-23 19:33:19 +02:00
Edward Hervey
4d40ac3fc5 video: Don't corrupt caption GstMeta
the meta initialization function is provided *after* the base implementation
fields have been set so do *NOT* reset them otherwise it would result
in corrupted GstMeta.

Instead explicitely set our fields to the default values we actually want.
2018-04-16 17:04:06 +02:00
Edward Hervey
9dceb6ca52 video: Add support for VANC and Closed Caption
This commits add common elements for Ancillary Data and Closed
Caption support in GStreamer:

* A VBI (Video Blanking Interval) parser that supports detection
  and extraction of Ancillary data according to the SMPTE S291M
  specification. Currently supports the v210 and UYVY video
  formats.

* A new GstMeta for Closed Caption : GstVideoCaptionMeta. This
  supports the two types of CC : CEA-608 and CEA-708, along with
  the 4 different ways they can be transported (other systems
  are super-set of those).

https://bugzilla.gnome.org/show_bug.cgi?id=794901
2018-04-09 15:15:24 +02:00