Commit graph

9 commits

Author SHA1 Message Date
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