Commit graph

44 commits

Author SHA1 Message Date
Edward Hervey
6a9108884c mpegts: Add support for SCTE-35 sections
Not all commands are supported, but the most common ones are.
Both parsing and packetizing is supported
2019-10-31 12:31:27 +00:00
Mathieu Duponchelle
f9c0367619 mpegtssection: events don't necessarily have a structure 2019-05-30 17:20:12 +02:00
Mathieu Duponchelle
09749192d8 mpegts: extend support for ATSC tables
Adds constructors for the following sections:

STT: System Time Table
MGT: Master Guide Table
RRT: Rating Region Table

Also adds parsing code for RRT
2019-05-30 13:53:05 +00:00
Thibault Saunier
47a49f3381 docs: Build documentation with hotdoc 2019-05-13 17:00:00 -04:00
Tim-Philipp Müller
b6411ae74c libs: fix API export/import and 'inconsistent linkage' on MSVC
For each lib we build export its own API in headers when we're
building it, otherwise import the API from the headers.

This fixes linker warnings on Windows when building with MSVC.

The problem was that we had defined all GST_*_API decorators
unconditionally to GST_EXPORT. This was intentional and only
supposed to be temporary, but caused linker warnings because
we tell the linker that we want to export all symbols even
those from externall DLLs, and when the linker notices that
they were in external DLLS and not present locally it warns.

What we need to do when building each library is: export
the library's own symbols and import all other symbols. To
this end we define e.g. BUILDING_GST_FOO and then we define
the GST_FOO_API decorator either to export or to import
symbols depending on whether BUILDING_GST_FOO is set or not.
That way external users of each library API automatically
get the import.

While we're at it, add new GST_API_EXPORT in config.h and use
that for GST_*_API decorators instead of GST_EXPORT.

The right export define depends on the toolchain and whether
we're using -fvisibility=hidden or not, so it's better to set it
to the right thing directly than hard-coding a compiler whitelist
in the public header.

We put the export define into config.h instead of passing it via the
command line to the compiler because it might contain spaces and brackets
and in the autotools scenario we'd have to pass that through multiple
layers of plumbing and Makefile/shell escaping and we're just not going
to be *that* lucky.

The export define is only used if we're compiling our lib, not by external
users of the lib headers, so it's not a problem to put it into config.h

Also, this means all .c files of libs need to include config.h
to get the export marker defined, so fix up a few that didn't
include config.h.

This commit depends on a common submodule commit that makes gst-glib-gen.mak
add an #include "config.h" to generated enum/marshal .c files for the
autotools build.

https://bugzilla.gnome.org/show_bug.cgi?id=797185
2018-09-24 14:45:56 +01:00
Russel Winder
bfe26464c9 mpegts: Add GIR generation array anotations
For function parameters that are known to be arrays.

https://bugzilla.gnome.org/show_bug.cgi?id=796221
2018-05-19 11:06:14 +02:00
Tim-Philipp Müller
b77948d511 mpegts: make accidentally exported debug category symbol private
Was never in header files, was just exported by accident because
of the gst_ prefix of the variable name.
2017-08-11 14:39:07 +01:00
Sebastian Dröge
57bb47f3f7 mpegtssection: Fix off-by-one in PMT parsing 2016-11-28 20:05:02 +02:00
Sebastian Dröge
911a6083c8 mpegtssection: Don't assert if the given section length is longer than the PMT actually is
Instead error out cleanly and just assert that we didn't read more than
the available data.
2016-11-28 19:53:46 +02:00
Edward Hervey
d58f668ece mpegtssection: Add more section size checks
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
2016-11-26 10:46:08 +01:00
Edward Hervey
7b12593cce mpegtssection: Fix PAT parsing
Use the estimated number of programs for parsing. Avoids over-reading.

https://bugzilla.gnome.org/show_bug.cgi?id=775120
2016-11-26 10:45:52 +01:00
Edward Hervey
d1fa342b71 mpegtssection: Don't free empty streams
Also avoids a useless assertion
2016-11-24 11:15:22 +01:00
Jesper Larsen
355439206d mpegts: return early if packetizing short section
Short sections have 3 bytes of common header, while other sections
have 8 bytes of common header. If packetizing common header of short
section, we should stop after the first 3 bytes.

https://bugzilla.gnome.org/show_bug.cgi?id=735653
2015-06-12 19:21:51 +01:00
Felix Schwarz
a2b82ba541 mpegts: fix typos in comments
https://bugzilla.gnome.org/show_bug.cgi?id=738072
2014-10-07 13:11:13 +01:00
Sebastian Rasmussen
fba6ebaae2 mpegts: No need to check for NULL before calling g_free()
Fixes https://bugzilla.gnome.org/show_bug.cgi?id=732789
2014-07-09 12:04:17 +02:00
Edward Hervey
8c53dfcfb6 mpegts: Expose GstMpegtsDescriptor free function
Nothing earth shattering, but avoids people having to use g_boxed_free()
2014-07-01 10:03:49 +02:00
Edward Hervey
22dfd9aef3 mpegts: Unify API : GstMpegts / gst_mpegts_ / GST_*_MPEGTS_
It was previously a mix and match of both variants, introducing just too much
confusion.

The prefix are from now on:
* GstMpegts for structures and type names (and not GstMpegTs)
* gst_mpegts_ for functions (and not gst_mpeg_ts_)
* GST_MPEGTS_ for enums/flags (and not GST_MPEG_TS_)
* GST_TYPE_MPEGTS_ for types (and not GST_TYPE_MPEG_TS_)

The rationale for chosing that is:
* the namespace is shorter/direct (it's mpegts, not mpeg_ts nor mpeg-ts)
* the namespace is one word under Gst
* it's shorter (yah)
2014-06-25 14:50:05 +02:00
Edward Hervey
cddabd751c mpegtssection: Free data in error cases
Data is marked as "transfer full", if we have an error we need to
free it.
2014-06-25 14:15:37 +02:00
Thiago Santos
1cab60b713 mpegts: atsc: add atsc's EIT table parsing
ATSC has its own version of the EIT table (DVB also has one).

This patch adds parsing for the ATSC EIT table and also fixed
the section identification to mark it as the ATSC one.

The implementation aws refactored to reuse some common internal
structures from ETT.

Also adds its dumping function to ts-parser example

https://bugzilla.gnome.org/show_bug.cgi?id=730435
2014-05-29 10:38:00 +02:00
Thiago Santos
0c6bb561e0 mpegts: atsc: add STT table parsing
Adds the system time table structure and functions for convenient parsing of
it and for getting the UTC datetime that it represents. Also adds its
information dumping to the ts-parser example

https://bugzilla.gnome.org/show_bug.cgi?id=730435
2014-05-29 10:37:59 +02:00
Thiago Santos
7ced36eccd mpegts: atsc: add ETT structures and parsing
ETT (extended text table) contains ATSC text information with descriptions
of virtual channels and events. The text can be internationalized and also
compressed.

https://bugzilla.gnome.org/show_bug.cgi?id=730435
2014-05-29 10:37:59 +02:00
Thiago Santos
9eed28d353 mpegts: add atsc MGT section parsing
Add a parsing function for MGT and also detect the EIT tables
for ATSC, the EIT pids are reported inside the MGT and we are still
only relying only on the table id for detecting it. In the future we
would want to also check the pid and compare with whatever the MGT
previously reported to confirm that it is indeed the EIT.

https://bugzilla.gnome.org/show_bug.cgi?id=730435
2014-05-29 10:37:59 +02:00
Thiago Santos
8f6a3c0a99 mpegts: atsc: rename TVCT to VCT as it is the same as CVCT
Make the ATSC section parse handle both TVCT and CVCT as they are
nearly the same struct (CVCT uses 2 reserved bits that are ignored
in TVCT).

This is changing the glib type and the struct name but TVCT wasn't
released in a stable package yet so there should be no problem.

Also includes some parsing fixes and changes short_name to be
directly stored as utf8 rather than utf16

https://bugzilla.gnome.org/show_bug.cgi?id=730642
2014-05-29 10:37:59 +02:00
Thiago Santos
f99fe4747e mpegts: sections: prevent assertion when packet parsing fails
the descriptors entry can be left as NULL and freeing the structure
will fail (assertion happens)
2014-05-15 19:25:06 -03:00
Stefan Ringel
f566d17202 mpegts: add atsc terrestrial virtual channel table
https://bugzilla.gnome.org/show_bug.cgi?id=727460
2014-04-10 09:09:38 +02:00
Vincent Penquerc'h
195470a785 mpegts: turns out glib aborts on allocation failure
So this is actually pointless. We'll just have to ignore
Coverity moaning on those.

Revert "mpegts: test for allocation failure"

This reverts commit 224cb81b8f.
2014-04-09 16:01:43 +01:00
Vincent Penquerc'h
224cb81b8f mpegts: test for allocation failure
While it's unlikely to get there, it silences the coverity warning
on the error code path that we test for NULL before freeing, when
all branches there are from locations where pmt cannot be NULL,
and removing the NULL check makes the code more vulnerable to a
hypothetical future branch from somewhere where it can be.

Coverity 1139852
2014-04-09 15:44:10 +01:00
Brendan Long
cd3c3ebf01 mpegts: Add gst_mpegts_section_get_data, to allow us to get the original binary section data.
https://bugzilla.gnome.org/show_bug.cgi?id=724255
2014-02-20 19:19:03 +01:00
Edward Hervey
4190a1717a mpeg-ts: Rename private function
Calling it _desc_checks when it was in fact used for sections was a
tad confusing ...
2014-02-20 18:14:51 +01:00
Jesper Larsen
603714a405 mpegts: pmt: Detect descriptor length correct 2014-02-08 18:41:06 +01:00
Jesper Larsen
f1c8de4bc2 mpegts: Correctly check for PAT,PMT,CAT,TSDT 2014-02-08 18:38:55 +01:00
Jesper Larsen
972f7ea71f mpegts: Fix some packetizing bugs
- Length of NIT stream descriptors was not detected correct
- Reserved bits was not set according to EN 300 468, ISO/IEC 13818-1
- Also set output data size if the section was previously packetized

https://bugzilla.gnome.org/show_bug.cgi?id=723892
2014-02-08 16:59:47 +01:00
Jesper Larsen
ffb51c2123 mpegts: Add support for creating PAT/PMT 2014-02-06 15:50:28 +01:00
Jesper Larsen
fccfc76805 mpegts: Add program_number to GstMpegTsPMT 2014-02-06 15:30:48 +01:00
Jesper Larsen
8f429c6c6e mpegts: Add functions to send sections as events
Added function that enables the user to send a GstMpegTsSection as
an event to a GstElement. (i.e. mpegtsmux)
2014-02-06 14:00:33 +01:00
Jesper Larsen
930cde73a7 mpegts: Add functions to packetize section
Sections needs to be packetized for use in i.e. mpegtsmux.
These functions handles the generic common parts of a GstMpegTsSection
2014-02-06 14:00:28 +01:00
Jesper Larsen
b1c5143b79 mpegts: Add init functions for descriptor/section 2014-02-06 12:18:13 +01:00
Edward Hervey
5d06aed3e2 mpegts: ABI/API break: Use GPtrArray instead of GArray
While it was a great idea, various g-i based bindings don't support
GArray with entries greater than sizeof(gpointer) :(

So let's just make everybody happy by just using GPtrArray.

And since we're breaking the API, also rename the various descriptor fields
to no longer have the descriptor_ prefix.

It does cost a bit more in terms of memory/cpu usage, but makes it usable
from bindings.
2013-08-21 08:59:42 +02:00
Edward Hervey
ae4d6bb334 mpegts: Unify section checks and add BAT parsing
* Avoid repeating code everywhere, and instead provide all parsing
  information in one go.
* Add BAT support
* Refine BAT/CAT identification (by adding PID checks)
2013-07-09 12:25:11 +02:00
Edward Hervey
f3d53fcd97 mpegts: Avoid false-positives in section type detection
Due to the variety of section types out there, we need to add
some checks when identifying section types.

We check here that the PID is also consistent with the table_id.
2013-07-07 08:35:02 +02:00
Edward Hervey
f24c0b62e3 mpegts: Improve documentation
* Add a base page for the library
* Add pages for the base MPEG-TS section and descriptors
* Add pages for the known variants
* Add documentation on more fields/sections/types
* Remove some fixmes that were ... fixed
2013-07-04 08:45:33 +02:00
Edward Hervey
982aee25c6 mpegts: Split files and implement free functions
* In order to avoid future clashing between table_id for the various
  mpeg-ts variants, use different enums.
* In order to keep everything clean(ish) and allow for cleaner growth,
  split into different files (will need the same for descriptors later)
* Also ... implement free functions for all table types :)
2013-07-03 17:59:02 +02:00
Edward Hervey
c1366efcd6 libs/mpegts: Rename GstMpegTS => GstMpegTs
Sorry for this :( But this makes it more in sync with expected type
naming in gobject (i.e. CamelCase and not CamelMAYBECase).

Also split descriptor type enums into the different variants:
* ISO H.222.0 / 13818-1 (i.e. standard mpeg-ts)
* DVB
* ATSC
* ISDB
* miscellaneous

This will avoid future clashes when specs use the same descriptor type
2013-07-03 13:59:56 +02:00
Edward Hervey
3665e8543a gst-libs: New Mpeg-TS support library
Exposes various MPEG-TS (ISO/IEC 13818-1) and DVB (EN 300 468) Section
Information as well as descriptors for usage by plugins and applications.

This replaces entirely the old GstStructure-based system for conveying
mpeg-ts information to applications and other plugins.

Parsing and validation is done on a "when-needed" basis. This ensures
the minimal overhead for elements and applications creating and using
sections and descriptors.

Since all information is made available, this also allows applications
to parse custom sections and descriptors.

Right now the library is targeted towards parsing, but the structures
could be used in the future to allow applications to create and inject
sections and descriptors (for usage by various mpeg-ts elements).

https://bugzilla.gnome.org/show_bug.cgi?id=702724
2013-07-03 09:17:25 +02:00