Commit graph

422 commits

Author SHA1 Message Date
Ramprakash Jelari
f9e50eee58 mpegtspacketizer: Fix format string compiler warning 2014-11-24 13:34:21 +01:00
Matthieu Bouron
0b040b7131 mpegtsbase: do not remove programs on EOS
As a consequence, tsdemux won't remove its pads anymore on EOS.

Fixes the case when mpegtsbase is not able to process new packets
after EOS as the corresponding pids aren't known anymore because
the programs were removed and the pes/psi were kept, preventing the
PAT to be parsed again.

https://bugzilla.gnome.org/show_bug.cgi?id=738695
2014-10-30 16:28:40 +01:00
Jan Schmidt
068cba5df6 tsparse: Handle backward and discont timestamps better.
Assume that small backward PCR jumps are just from upstream packet
mis-ordering and don't reset timestamp tracking state - assuming that
things will be OK again shortly.

Make the threshold for detecting discont between sequential buffers
configurable and match the smoothing-latency setting on tsparse
to better cope with data bursts.
2014-10-29 23:02:50 +11:00
Jan Schmidt
a49ce685d1 tsparse: Implement timestamp/retimestamping of output buffers
When the set-timestamps property is set, use PCRs on the provided
(or autodetected) pcr-pid to apply (or replace) timestamps on the
output buffers, using piece-wise linear interpolation.

This allows tsparse to be used to stream an arbitrary mpeg-ts file,
or to smooth jittery reception timestamps from a network stream.

The reported latency is increased to match the smoothing latency if
necessary.
2014-10-29 23:02:50 +11:00
Tim-Philipp Müller
2cd4f5d0c1 tsdemux: send initial GAP event on sparse streams for faster startup with playbin
Signal sparse streams properly in stream-start event and force sending
of pending sticky events which have been stored on the pad already and
which otherwise would only be sent on the first buffer or serialized
event (which means very late in case of subtitle streams). Playsink in
playbin waits for stream-start or another serialized event, and if we
don't do this it will wait for the multiqueue to run full before
starting playback, which might take a couple of seconds.

https://bugzilla.gnome.org/show_bug.cgi?id=734040
2014-10-20 12:32:19 +02:00
Edward Hervey
b59a9262c0 tsdemux: GAP detection
All pads of a stream are now added at the beginning. In order to cope with
streams that don't get any data (forever or for a long time) we detect gaps
and push out GAP events when needed.

Cleanups and commenting by Jan Schmidt <jan@centricular.com>

https://bugzilla.gnome.org/show_bug.cgi?id=734040
2014-10-20 12:32:10 +02:00
Jesper Larsen
1b8e76d235 tsdemux: do not discard on discont if PES start
If a discontinuity in the stream is detected, data is discarded until
a new PES starts. If the first packet after the discontinuity is also
the start of a PES, there is no reason to discard the packets.

https://bugzilla.gnome.org/show_bug.cgi?id=737569
2014-09-29 11:41:01 +02:00
Aurélien Zanelli
77b850c08d tsdemux: fix trivial coding style issue
https://bugzilla.gnome.org/show_bug.cgi?id=736531
2014-09-12 11:31:59 +02:00
Aurélien Zanelli
6d767a09d8 tsdemux: fix overflow of packet_length field of PESHeader
packet_length is defined as a guint16 in the PESHeader structure. This
definition match the specification. But since we add 6 bytes to the
packet_length value (length of start_code + stream_id + packet_length),
we can overflow the guint16 when the value in the PES header is greater
than 65529.
So use a guint32 instead of a guint16 to avoid overflow.

https://bugzilla.gnome.org/show_bug.cgi?id=736490
2014-09-12 11:27:52 +02:00
Jesper Larsen
ff444dbf6d tsdemux: clear mutex resources in dispose
https://bugzilla.gnome.org/show_bug.cgi?id=736390
2014-09-10 18:53:47 +01:00
Thiago Santos
52257fe538 tsdemux: remove pads when resetting the element
Otherwise the pads will be there if it is restarted and the stream
can be a completely different one.

https://bugzilla.gnome.org/show_bug.cgi?id=734394
2014-08-19 00:02:33 -03:00
Thibault Saunier
03031037fa tsdemux: Do not tweak segments on reverse playback
We can't compare the first buffer start and the segment start in that
case... playback is going backward!

https://bugzilla.gnome.org/show_bug.cgi?id=734445
2014-08-13 17:46:55 +02:00
Sebastian Dröge
54c61efe44 mpegtspacketizer: Store PCR time/byte offsets in 64 bit integers
32 bit integers are going to overflow, especially the PCR offset to
the first PCR will overflow after about 159 seconds. This makes playback
of streams stop at 159 seconds as suddenly the timestamps are starting
again from 0. Now we have a few more years time until it happens again
and 64 bits are too small.
2014-08-05 11:45:55 +02:00
Sebastian Dröge
cb293af93d Revert "mpegtspacketizer: Convert PCR times to GStreamer times before comparing them against 500 * GST_MSECOND"
This reverts commit 9f186c6ab3.

That commit was actually completely wrong, nevermind.
2014-08-05 10:42:28 +02:00
Sebastian Dröge
9f186c6ab3 mpegtspacketizer: Convert PCR times to GStreamer times before comparing them against 500 * GST_MSECOND
Otherwise it will believe to detect PCR gaps already when there's a very small
gap of a few milliseconds, breaking playback of some files.
2014-08-05 10:37:41 +02:00
Thiago Santos
1685c45465 mpegtspacketizer: avoid timestamp overflows
Cause timing to break in the pipeline that can lead to a stall

https://bugzilla.gnome.org/show_bug.cgi?id=733837
2014-08-01 10:37:15 -03:00
Mathieu Duponchelle
29dd215649 tsdemux: Do not scan for keyframe when in push mode.
Fixes https://bugzilla.gnome.org/show_bug.cgi?id=733490
2014-07-22 15:51:21 +02:00
Mathieu Duponchelle
39d7d438c6 tsdemux: Do not scan for a keyframe in non-accurate mode.
Fixes https://bugzilla.gnome.org/show_bug.cgi?id=733490
2014-07-22 15:50:59 +02:00
Sebastian Dröge
aa6ee77297 mpegtspacketizer: Don't dereference NULL if we have no PCR yet
Can happen sometimes if the duration is requested before we
received enough data with a PCR.
2014-07-03 14:15:36 +02:00
Jan Schmidt
c103f7134b tsdemux: Add locking around mpegtspacketiser groups.
Otherwise occasionally DURATION queries can crash, if they happen at
the wrong moment.
2014-07-03 21:46:28 +10:00
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
Stefan Ringel
7c884374eb mpegts: change to GType and from gchar[] to gchar*
https://bugzilla.gnome.org/show_bug.cgi?id=730914
2014-06-24 16:06:01 +02:00
Tim-Philipp Müller
983eb6d28a tsdemux: fix up comment 2014-06-22 12:32:35 +01:00
Sebastian Dröge
59bdcd9ae3 tsdemux: Update comments to the new reality and remove unused variables 2014-06-21 16:55:05 +02:00
Edward Hervey
1d1d469488 tsdemux: Don't overwrite original seek value
In accurate mode, we'll be using start to fill in the seek segment,
therefore don't overwrite it with the shifted seek position.

https://bugzilla.gnome.org/show_bug.cgi?id=731698
2014-06-16 07:42:37 +02:00
Edward Hervey
97b3382c80 mpegtspacketizer: live: handle pcr/dts discrepancies some more
When wrapover/reset occur, we end up with a small window of time where
the PTS/DTS will still be using the previous/next time-range.

In order not to return bogus values, return GST_CLOCK_TIME_NONE if the
PTS/DTS value to convert differs by more than 15s against the last seen
PCR

https://bugzilla.gnome.org/show_bug.cgi?id=674536
2014-06-13 11:52:15 +02:00
Edward Hervey
fdf9bdf929 mpegtspacketizer: Fix wraparound detection issue
Using 32bit unsigned values for corrected pcr/offset meant that we
potentially ended up in bogus values

Furthermore, refpcr - refpcroffset could end up being negative, which
PCRTIME_TO_GSTTIME() can't handle (and returned a massive positive value)
2014-06-13 11:48:39 +02:00
Mathieu Duponchelle
79c13b713e tsdemux: implement proper seeking for h264 streams.
Co-Authored by: Thibault Saunier <tsaunier@gnome.org>

From a high level perspective, the new process for seeking h264
streams is as follows:

1) Rewind the stream until we find the first I-slice of a frame,
   and mark its offset in the stream.
2) Rewind the stream until we find SPS and PPS informations,
   to make sure the subsequent parser is up to date.
3) Accumulate optionnal SEI NAL units on the way.
4) Push the SPS, PPS and SEI units before the new keyframe.

https://bugzilla.gnome.org/show_bug.cgi?id=675132
2014-06-12 14:44:10 +02:00
Edward Hervey
6be887783e mpegtspacketizer: Use first group for handling reference pcr
If _set_current_pcr_offset gets called after a flushing seek, we ended
up using the current group for delta calculation ... whereas we should
be using the first group to calculate shifts.

Also add an early exit if there are no changes to apply
2014-06-11 09:41:50 +02:00
Edward Hervey
0020a9344d tsdemux: Remove unused variable
The seeksegment was no longer used since the switch to calculating segments
when we see data.
2014-06-10 14:50:10 +02:00
Edward Hervey
6043f7a578 mpegtspacketizer: Fix debug statement 2014-06-10 14:27:53 +02:00
Edward Hervey
8e28f335f4 mpegtspacketizer: Fix duration evaluation in push mode
When working in push mode, we need to be able to evaluate the duration
based on a single group of observations.

To do that we use the current group values
2014-06-10 14:27:01 +02:00
Edward Hervey
a822517ca9 mpegtspacketizer: Handle early PTS conversion
When handling the PTS/DTS conversion in new groups, there's a possibility
that the PTS might be smaller than the first PCR value observed, due to
re-ordering.

When using the current group, only apply the wraparound correction when we
are certain it is one (i.e. differs by more than a second) and not when it's
just a small difference (like out-of-order PTS).

https://bugzilla.gnome.org/show_bug.cgi?id=731088
2014-06-10 13:29:28 +02:00
Edward Hervey
a2890e831b mpegtsdemux: Fix sticky event handling
When we receive sticky events from upstream, always return TRUE.

Fixes the issue where we receive custom sticky events (such as "uri")
and no pads are created yet.
2014-06-07 07:15:33 +02:00
Jan Schmidt
9538651a20 tsdemux: Remove extraneous extra parameter from check_pending_buffers function 2014-06-04 21:56:28 +10:00
Jan Schmidt
a86b3d032c mpegtspacketiser: Always initialise packet AFC flags and PCR fields
Also fix a slight typo in a comment about the smoothing algorithm
2014-06-04 21:56:00 +10:00
Jan Schmidt
842c4a3d2c tsdemux: Reset pending_ts on a discont, to re-measure initial timestamps
Since all the other timestamp tracking now gets reset on a discont,
it makes sense to wait for a PCR and timestamp buffers like when
playback first starts
2014-06-04 21:54:43 +10:00
Thiago Santos
32d8022820 tsbase: parse the mgt and add listed EIT/ETT pids to the known psi
This will make tsbase also parse the EITs and ETTs from ATSC streams that have
their pids reported on the MGT and post to the bus

https://bugzilla.gnome.org/show_bug.cgi?id=730435
2014-05-29 10:37:59 +02:00
Thiago Santos
c56a4d54b8 tsdemux: add/remove pads to flowcombiner differently due to streaming nature
Due to mpegts streaming nature some pads are created but are only added
later to the element. This can cause a scenario where the first stream
doesn't have an available decoder (while the next ones still pending
would have) and tsdemux will fail with not-linked as the first stream
added wouldn't be linked.

To avoid this tsdemux needs to add pads to the flowcombiner
when they are created instead of only when adding them to the
element.
2014-05-27 10:29:32 -03:00
Thiago Santos
ae839d8dc2 mxfdemux: use GstFlowCombiner
Removes flow return combination code to use the newly added GstFlowCombiner

https://bugzilla.gnome.org/show_bug.cgi?id=709224
2014-05-26 23:29:43 -03:00
Thiago Santos
b66012a586 tsdemux: use GstFlowCombiner
Removes flow return combination code to use the newly added GstFlowCombiner
2014-05-26 23:29:43 -03:00
Edward Hervey
1b5e514a05 mpegtbase: Small rewrite
Setting done was useless anyway
2014-05-13 13:54:23 +02:00
Tim-Philipp Müller
ab3153b9a2 tsdemux: remove confusing debug log line 2014-05-10 12:56:24 +01:00
Sebastian Dröge
516597d5fa mpegtspacketizer: Remove dead code and simplify if statement
CID 1204274
2014-04-22 12:56:54 +02:00
Edward Hervey
f062b78051 mpegtspacketizer: Improve ts_to_offset code
* Search in current pending values first. For CBR streams we can very
  easily end up having just one initial observations and then nothing
  else (since the bitrate doesn't change).
* Use one group whether we are in that group *OR* if there is only
  one group.
* If the group to use isn't closed (points are being accumulated in the
  PCROffsetCurrent), use the latest data available for calculation
* If in the unlikelyness that all of this *still* didn't produce more
  than one data point, just return the initial offset
2014-04-18 16:23:43 +02:00
Edward Hervey
f96604099d tsdemux: Fix scaling macros
While the calculation done in these macros will work with 64bit
integers, they will fail if working with 32bit integers.

Force the scaling up to solve that.

This amazingly didn't introduce major issues up to now, but resulted
in bogus values in debug logs.
2014-04-18 16:20:31 +02:00
Edward Hervey
da74a23c1d mpegtsbase: Don't hard-flush the packetizer on discont buffers
Doing a hard flush on the packetizer will drop all observations, which
will eventually break push-based seeking (with BYTES segment) since
we won't know where to seek to anymore (new data would always be
considered as the beginning of the stream).
2014-04-18 16:18:01 +02:00
Vincent Penquerc'h
f255422ec2 mpegtsdemux: catch prev-not-found when inserting in the group list
While this probably should never happen if callers are well behaved,
this avoids a crash if it does. With a warning about it. Unsure if
it'd be better to not add at all, but it should not happen...

Coverity 1139713
2014-04-09 14:13:46 +01:00
Sebastian Dröge
7b2cfa6303 mpegtspacketizer: Fix typo in debug output 2014-03-29 10:33:45 +01:00
Sebastian Dröge
986c8782e4 tsdemux: Push next buffer after a discont with the DISCONT flag 2014-03-29 10:33:45 +01:00
Sebastian Dröge
264d7dbd89 tsdemux: Drain remaining data on disconts 2014-03-29 10:33:45 +01:00
Sebastian Dröge
d986d24d41 mpegtsbase: Flush if we receive a discont buffer 2014-03-29 10:33:45 +01:00
Sebastian Dröge
11bc356ce7 tsdemux: Don't dereference NULL if flushed before a program was selected 2014-03-29 10:33:45 +01:00
Sebastian Dröge
ba114b6b22 tsdemux: Ensure that all pending data is pushed even if the stream was not activated before
gst_ts_demux_push_pending_data() will check if it now can activate the
stream and add the pad, we don't have to check that ourselves.

Fixes playback of very short MPEG TS files.
2014-03-29 10:33:45 +01:00
Sebastian Dröge
0cecb44813 mpegtsbase: Fix pull mode scanning for PCR on small files
If a file does not contain 5 PCRs until it is EOS, or does not
contain more than 655360 bytes the PCR scanning algorithm just
aborted.
2014-03-29 10:33:45 +01:00
Jan Schmidt
bfe2994101 tsdemux: Fix mpegts_packetizer_set_current_pcr_offset()
When adjusting the PCR offset of groups, adjust the correct group
entry from the list - not the current group repeatedly.
2014-03-25 21:40:11 +11:00
Edward Hervey
6629ca8f2b tsdemux: Support Bluray DTS/DTS-HD and AC3+/TrueHD streams
Apart from just adding detection of the proper stream type, we also need to only
output the first substream (0x71) which contains the core substream.

While this does not provide *full* DTS-HD support (since it will miss the complementary
substreams), it will still work in the way legacy (non-DTS-HD) bluray players would work.

https://bugzilla.gnome.org/show_bug.cgi?id=725563
2014-03-15 18:09:12 +01:00
Thiago Santos
6b4ce0d04f tsdemux: store global tags to push later
Keep a list of current global tags around and push them
whenever a new stream is started. Also convert all stream
specific tags to global as they are stream specific for
the container, so they are global for the streams from
within that container.

https://bugzilla.gnome.org/show_bug.cgi?id=644395
2014-02-26 10:26:57 -03:00
Edward Hervey
fc34d163d8 mpegtsbase: Uncomment PAT clearup in _reset
The PAT is related to the stream, we therefore want it cleared along
with anything stream related.

This commented section was from the (old) mpegtsparse and *might* have
been related to speeding up DVB start-up. But we have another plan for that.

Fixes https://bugzilla.gnome.org/show_bug.cgi?id=724716
2014-02-21 14:07:51 +01:00
Edward Hervey
c229a87ac3 mpegtspacketizer: Fix ts_to_offset beyond last observed PCR
The requested TS might be beyond the last observed PCR. In order to calculate
a coherent offset, we need to use the last and previous-to-last groups.

https://bugzilla.gnome.org/show_bug.cgi?id=721035
2014-02-20 21:52:16 +01:00
Edward Hervey
3e6c1967c9 mpegtspacketizer: Remove or move variable assignments
To where they're needed
2014-02-07 11:54:07 +01:00
Edward Hervey
00bf61a0db mpegtsdemux: Update plugin license field
The original code (old mpegtsparse) from which this plugin was based on
was dual-licensed. This allowed usage of the code under any of the
licenses (which including LGPL):

"""
* Alternatively, the contents of this file may be used under the terms of
* the GNU Lesser General Public License Version 2 or later (the "LGPL"),
* in which case the provisions of the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of the MPL or the LGPL.
"""

When refactored (leading to the creation of this new plugin), I chose all
new code to be LGPL-only (which was allowed for pre-existing code) by removing
the MPL sections.

The headers were all updated, but not the plugin license field. This commit
fixes this.
2014-02-06 14:28:54 +01:00
Sebastian Dröge
9682e44db6 tsdemux: We do not support the SKIP seek flag but that is not a problem 2014-01-30 20:29:58 +01:00
Amaury Medeiros
44a87d2109 tsdemux: Fix flags comparison operator precedence
Fix operator precedence, so the whole operation is
negated instead of only flags variable.

https://bugzilla.gnome.org/show_bug.cgi?id=722096
2014-01-28 13:56:44 +01:00
Andrey Utkin
0caa4cdfd8 tsdemux: Fix leak of PCROffsetGroup
https://bugzilla.gnome.org/show_bug.cgi?id=722462
2014-01-17 23:08:49 -03:00
Andrey Utkin
4d957e53e4 tsdemux: fix memleak of PCROffsetCurrent
https://bugzilla.gnome.org/show_bug.cgi?id=722145
2014-01-14 10:33:44 +01:00
Sebastian Dröge
84bd65b9bd tsdemux: Add HEVC / h265 support 2014-01-06 13:54:40 +01:00
Edward Hervey
64592da3e9 tsdemux: Demote GST_ERROR to GST_WARNING
discontinuities are not errors per-se and we handle them correctly.
2013-10-28 09:15:20 +01:00
Matthieu Bouron
84fbc08c25 mpegtsdemux: fix uninitialized variable warning
https://bugzilla.gnome.org/show_bug.cgi?id=710759
2013-10-25 12:26:23 +01:00
Edward Hervey
70d83b323b mpegtspacketizer: Skip packets with corrupted length
This is similar to what we do for packets with payload
2013-10-11 10:34:17 +02:00
Edward Hervey
5e50cd507c tsdemux: Refactor language tag extraction
subtitling descriptor needs to be used with a different method to extract
language codes.
2013-10-11 10:29:20 +02:00
Jesper Larsen
b6d33e5ce4 tsdemux: Use mpegts-lib for ISO 639 language tags
https://bugzilla.gnome.org/show_bug.cgi?id=709180
2013-10-07 10:23:22 +02:00
Jesper Larsen
279bdef4ea tsdemux: Return descriptor in get_descriptor
https://bugzilla.gnome.org/show_bug.cgi?id=709180
2013-10-07 10:23:22 +02:00
Steve Maynard
17ed696faa mpegts: Add SCTE/EISS sections and table types
https://bugzilla.gnome.org/show_bug.cgi?id=708688
2013-09-28 13:15:44 +02:00
Edward Hervey
0e9ce593bf tsdemux: Wait for valid PCR/offset obvervations
It is quite possible that we might get PTS/DTS before the first
PCR/Offset observation.

In order to end up with valid timestamp we wait until at least one
stream was able to get a proper running-time for any PTS/DTS.
Until then, we queue up the pending buffers to push out.

Once we see a first valid timestamp, we re-evaluate the amount of
running-time elapsed (based on returned inital running-time and amount
of data/DTS queued up) for any given stream.

Taking the biggest amount of elapsed time, we set that on the packetizer
as the initial offset and recalculate all pending buffers running-time
PTS/DTS.

Note: The buffer queueing system can also be used later on for the
dvb fast start proposal (where we queue up all stream packets before
seeing PAT/PMT and then push them once we know if they belong to the
chosen program).
2013-09-28 13:15:43 +02:00
Edward Hervey
2762ead5ef mpegtsdemux: New PCR<=>Offset estimation code
This allows:
* Better duration estimation
* More accurate PCR location
* Overall more accurate running-time location and calculation

Location and values of PCR are recorded in groups (PCROffsetGroup)
with notable PCR/Offset observations in them (when bitrate changed
for example). PCR and offset are stored as 32bit values to
reduce memory usage (they are differences against that group's
first_{pcr|offset}.

Those groups each contain a global PCR offset (pcr_offset) which
indicates how far in the stream that group is.

Whenever new PCR values are observed, we store them in a sliding
window estimator (PCROffsetGroupCurrent).

When a reset/wrapover/gap is detected, we close the current group with
current values and start a new one (the pcr_offset of that new group
is also calculated).

When a notable change in bitrate is observed (+/- 10%), we record
new values in the current group. This is a compromise between
storing all PCR/offset observations and none, while at the same time
providing better information for running-time<=>offset calculation
in VBR streams.

Whenever a new non-contiguous group is start (due to seeking for example)
we re-evaluate the pcr_offset of each groups. This allows detecting as
quickly as possible PCR wrapover/reset.

When wanting to find the offset of a certain running-time, one can
iterate the groups by looking at the pcr_offset (which in essence *is*
the running-time of that group in the overall stream).
Once a group (or neighbouring groups if the running-time is between two
groups) is found, once can use the recorded values to find the most
accurate offset.

Right now this code is only used in pull-mode , but could also
be activated later on for any seekable stream, like live timeshift
with queue2.

Future improvements:
* some heuristics to "compress" the stored values in groups so as to keep
  the memory usage down while still keeping a decent amount of notable
  points.
* After a seek compare expected and obtained PCR/Offset and if the
  difference is too big, re-calculate position with newly observed
  values and seek to that more accurate position.

Note that this code will *not* provide keyframe-accurate seeking, but
will allow a much more accurate PCR/running-time/offset location on
any random stream.
For past (observed) values it will be as accurate as can be.
For future values it will be better than the current situation.
Finally the more you seek, the more accurate your positioning will be.
2013-09-28 13:15:43 +02:00
Edward Hervey
5017ba84a7 mpegtspacketizer: No longer use a private struct
These are not public headers, it just adds complexity for no reason
2013-09-28 13:15:43 +02:00
Sebastian Dröge
d7c7f54734 mpegtsparse: Queue buffers until we have enough to know the caps
https://bugzilla.gnome.org/show_bug.cgi?id=708222
2013-09-27 16:10:54 +02:00
Arnaud Vrac
467e0151d3 mpegtspacketizer: rework TS packet sync and extraction
The previous code could enter an infinite loop because the adapter state
could get out of sync with its mapped data state after sync was lost.
The code was pretty confusing so it's been rewritten to be clearer.

The easiest way to reproduce the infinite loop is to use the breakmydata
element before tsdemux to trigger a resync.

https://bugzilla.gnome.org/show_bug.cgi?id=708161
2013-09-27 15:17:24 +02:00
Arnaud Vrac
85ad4f3ad6 tsdemux: fix buffer overflow
This can happen with a corrupt TS file, found with breakmydata element
plugged before tsdemux.

https://bugzilla.gnome.org/show_bug.cgi?id=708161
2013-09-27 15:10:23 +02:00
Sudip Jain
27739e8bb6 mpegtspacketizer: Correct condition check for current next indicator
https://bugzilla.gnome.org/show_bug.cgi?id=708106
2013-09-16 11:00:16 +02:00
Thiago Santos
efb27f19ec tsdemux: respect seqnums on seeks
Pass the seqnum to other events that are consequence of the
original seek event
2013-09-10 19:44:24 -03:00
Tim-Philipp Müller
cf791f6cb0 mpegtsdemux: fix possible read beyond end of buffer when resyncing 2013-08-27 17:05:44 +01:00
Edward Hervey
fd4fd13dc8 tsdemux: Refuse negative rates which we don't support yet
And remove a check which was done before
2013-08-21 14:44:38 +02:00
Edward Hervey
d6b55b8a66 mpegtsbase: Adapt for latest mpegts lib changes 2013-08-21 08:59:42 +02:00
Edward Hervey
21ebc7708d pesparse: Refactory secondary PES extension handling
Some streams had wrong values for the stream_id_extension, make sure
we only remember the valid ones.

For streams with PES_extension_field_length == 0, assume there's nothing
else.

For streams that state they have a TREF extension but don't have enough
data to store it, just assume it was produced by a non-compliant muxer
and skip the remaining data.

Only store remaining data in stream_id_extension_data instead of storing
data we already parse.
2013-08-14 13:41:37 +02:00
Edward Hervey
ddee83ef0b pesparse: Fix pes extension data length check
And remove length/data updates (we use the header size just below to
properly set them).

Based on feedback from Stas Sergeev <stsp@list.ru>

https://bugzilla.gnome.org/show_bug.cgi?id=657343
2013-08-14 10:39:46 +02:00
Edward Hervey
5208b8a050 pesparse: Remove unused argument
We always provided 0 as the offset and never used the returned value.

Based on feedback from Stas Sergeev <stsp@list.ru>

https://bugzilla.gnome.org/show_bug.cgi?id=657343
2013-08-14 10:33:14 +02:00
Edward Hervey
3b60f88437 mpegtspacketizer: Look harder for next sync position
If ever we lose sync, we were just checking for the next 0x47 marker ...
which might actually happen within a mpeg-ts packet.

Instead check for 3 repeating 0x47 at the expected packet size interval,
which the same logic we use when we initially look for the packet size.
2013-08-02 10:41:25 +02:00
Edward Hervey
c28acaa3c5 mpegtspacketizer: Fix PCR LUT table
We were only resetting the first 512 values of the lookup table instead
of the whole 8192.
This resulted in any PCR PID over 0x0200 ... ending up taking the first PCR
table around :(
2013-08-02 10:41:25 +02:00
Tim-Philipp Müller
646ba6b3df mpegts: private/teletext -> application/x-teletext 2013-07-30 16:08:17 +01:00
Sebastian Dröge
6812f96de4 gst: Don't swap start/stop for negative rates in the SEGMENT query 2013-07-29 12:14:08 +02:00
Sebastian Dröge
12981a5d82 tsdemux: Implement SEGMENT query 2013-07-29 11:02:55 +02:00
Edward Hervey
a45aa8fe48 tsdemux: Remove unused macros 2013-07-29 09:42:12 +02:00
Edward Hervey
edd69b2989 tsdemux: Add more AC3 detection cases
ATSC ac3 streams are always guaranteed to be AC3 if EAC3 descriptor
is not present
If stream registration id is 'AC-3' then it's also guaranteed to be AC3.
Finally if AC3 descriptor is present it's guaranteed to be AC3.

Only silences a warning, but still.
2013-07-29 09:42:11 +02:00
Edward Hervey
a76c658e8d tsdemux: Flush out pending data on EOS
Ensures downstream elements (like decoders) really get all the data
2013-07-29 09:42:11 +02:00
Edward Hervey
ca77865bce mpegtspacketizer: More AFC flags
I should have put those in a previous commit. sorry :(
2013-07-29 09:42:11 +02:00
Edward Hervey
cea403eaa5 mpegdefs: Simplify PCR/PTS/DTS => GST conversion macros
We know we will not overflow 64 bits, therefore just use direct
multiplication/division instead of the scale method (trims usage from
50 instruction calls to 2/3).
2013-07-29 09:42:11 +02:00
Edward Hervey
e6ebd9024e tsdemux: HDV only has mpeg 1 audio layer 2
Set that accordingly on the caps
2013-07-27 12:18:36 +02:00
Edward Hervey
8c60e42070 mpegtsdemux: Add more flag debugging for PES and TS packets
Helps with debugging issues. And also remove unused variable (opcr)

This will also allow us in the future to properly detect:
* random-access location (to enable keyframe observation and
  potentially seeking
* discont location (to properly handle resets)
* splice location (to properly handle new stream changes)
2013-07-26 08:17:17 +02:00