Since matroskademux will attempt to push unaligned buffers,
downstream might have trouble with those, especially if downstream
uses ORC, such as audioconvert.
Ensure we push buffers aligned to the basic type at least for
those raw buffers.
https://bugzilla.gnome.org/show_bug.cgi?id=659798
Changed the ebml reader's gst_ebml_peek_id_length() function so
that it returns the actual reason for why the peek failed, instead
of (almost) always returning GST_FLOW_UNEXPECTED. This prevents
the pulling task from sending EOS when doing a flushing seek.
matroskademux performs segment tricks to skip gaps in streams,
notably at start for non 0 based files. There may however be
cases when full presentation (including intermediate gaps) is
desired, so a property allows to configure as of which gap
to act (or not at all).
API: GstMatroskaDemux::max-gap-time
Fixes#659009.
Frame duration might vary for 1 usecond, in this case matroskamux
decides to create BLOCKGROUP instead of SIMPLEBLOCK.
Convert duration to timecodescale which is (typically) less precise, and
then also allow the difference of 1/-1 to arrange for less sensitive check.
Based on patch by Alexey Fisher <bug-track@fisher-privat.net>
Fixes#653080.
In particular, do so even if failing to read while prerolling,
such as when reading from a partial file (eg, while it is being
downloaded).
This fixes a wedge in playbin2.
https://bugzilla.gnome.org/show_bug.cgi?id=651965
Current matroska demux calculates the pixel aspect ratio only if both
DisplayHeight and DisplayWidth are set, but it is legal to use only
one variable if the other is equal to PixelWidth or PixelHeight, at
least the mkclean utility is doing that. So this makse mkcleaned
files play correctly.
https://bugzilla.gnome.org/show_bug.cgi?id=654744
Some video frames, for example alt-ref frame in VP8, will be
never displayed. This is why it has duration=0.
This patch allow to use this duration.
Bug: 654175
Signed-off-by: Alexey Fisher <bug-track@fisher-privat.net>
Move the following function to matroska-read-common.[ch] from
matroska-demux.c and matroska-parse.c:
- gst_matroska_{demux,parse}_parse_attachments
https://bugzilla.gnome.org/show_bug.cgi?id=650877
Move the following function to matroska-read-common.[ch] from
matroska-demux.c and matroska-parse.c:
- gst_matroska_{demux,parse}_parse_attached_file
https://bugzilla.gnome.org/show_bug.cgi?id=650877
Move the following function to matroska-read-common.[ch] from
matroska-demux.c and matroska-parse.c:
- gst_matroska_{demux,parse}_parse_metadata_id_tag
https://bugzilla.gnome.org/show_bug.cgi?id=650877
Move the following function to matroska-read-common.[ch] from
matroska-demux.c and matroska-parse.c:
- gst_matroska_{demux,parse}_parse_metadata_id_simple_tag
https://bugzilla.gnome.org/show_bug.cgi?id=650877
AUTHOR only existed in an old version of the spec and ARTIST is
the new replacement for this. We are still reading both to still
be compatible with old files.
Fixes bug #644875.
Move the following functions to matroska-read-common.[ch] from
matroska-demux.c and matroska-parse.c:
- gst_matroska_{demux,parse}_get_seek_track
- gst_matroska_{demux,parse}_reset_streams
https://bugzilla.gnome.org/show_bug.cgi?id=650877
Move the following functions to matroska-read-common.[ch] from
matroska-demux.c and matroska-parse.c:
- gst_matroska_index_seek_find
- gst_matroska{demux,parse}_do_index_seek
https://bugzilla.gnome.org/show_bug.cgi?id=650877
Move the following function to matroska-read-common.[ch] from
matroska-demux.c and matroska-parse.c:
- gst_matroska_{demux,parse}_tracknumber_unique
https://bugzilla.gnome.org/show_bug.cgi?id=650877
Move the following functions to matroska-read-common.[ch] from
matroska-demux.c and matroska-parse.c:
- gst_matroska_{demux,parse}_encoding_cmp
- gst_matroska_{demux,parse}_read_track_encodings
https://bugzilla.gnome.org/show_bug.cgi?id=650877
Move the following functions to matroska-read-common.[ch] from
matroska-demux.c and matroska-parse.c:
- gst_matroska_{demux,parse}_peek_id_length_pull
- gst_matroska_{demux,parse}_peek_id_length_push
https://bugzilla.gnome.org/show_bug.cgi?id=650877
Move the following functions to matroska-read-common.[ch] from
matroska-demux.c and matroska-parse.c:
- gst_matroska_{demux,parse}_encoding_order_unique
- gst_matroska_{demux,parse}_read_track_encoding
https://bugzilla.gnome.org/show_bug.cgi?id=650877
Move the following functions to matroska-read-common.[ch] from
matroska-demux.c and matroska-parse.c:
- gst_matroska_decode_content_encodings
- gst_matroska_decompress_data
https://bugzilla.gnome.org/show_bug.cgi?id=650877
Replace the following functions with their gst_matroska_read_common_*
counterparts:
- gst_matroska_{demux,parse}_parse_index
- gst_matroska_{demux,parse}_parse_skip
- gst_matroska_{demux,parse}_stream_from_num
Introduce GstMatroskaReadCommon to contain those members of
GstMatroskaDemux and GstMatroskaParse that were used by the above
functions.
https://bugzilla.gnome.org/show_bug.cgi?id=650877
Since the segment duration is given in terms of the
GST_MATROSKA_ID_TIMECODESCALE we should only convert it into
nanoseconds when we are sure that any scale specified in the file has
been read.
https://bugzilla.gnome.org/show_bug.cgi?id=650258
Since the segment duration is given in terms of the
GST_MATROSKA_ID_TIMECODESCALE we should only convert it into
nanoseconds when we are sure that any scale specified in the file has
been read.
https://bugzilla.gnome.org/show_bug.cgi?id=650258
We use -DG_DISABLE_ASSERT for the pre-releases, which makes these
warnings pop up in cases that were previously covered by g_assert_not_reached()
and the like:
tvtime/greedyh.c:801:14: warning: 'scanline' may be used uninitialized in this function
matroska-mux.c:501:19: warning: 'context' may be used uninitialized in this function
Remove the android/ top dir
Fixe the Makefile.am to be androgenized
To build gstreamer for android we are now using androgenizer which generates the needed Android.mk files.
Androgenizer can be found here: http://git.collabora.co.uk/?p=user/derek/androgenizer.git
AUTHOR only existed in an old version of the spec and ARTIST is
the new replacement for this. We are still reading both to still
be compatible with old files.
Fixes bug #644875.
It was an arbitrary limit from the start, meant as a basic sanity check,
so may just as well increase it a little. Would be good to provide
progress reporting while completing the block in any case..
https://bugzilla.gnome.org/show_bug.cgi?id=637060
Using this in a demuxer will cause deadlocks if there's
a pad with a pending pad-block downstream, no matter if
there is a queue between the pad or not. Queues pass
bufferalloc downstream from the same thread and only
act as a thread boundary for events and buffers.
Extra info can't hurt. Field names aren't necessarily consistent with
what's used elsewhere though (e.g. avidemux), but then neither are the
caps.
https://bugzilla.gnome.org/show_bug.cgi?id=623178
Only send newsegment events with new positions downstream when actually
needed, instead of sending multiple newsegment events with new seek
positions in a row. Also set the discont flag on buffers after a
discontinuity.
Re-use the existing 'pos' field maintained by ebml writer to set
buffer offsets. This also makes sure that we set the right offsets
on buffers after a seek (e.g. when writing an index at the end).
That is, if parse error occurs in state requiring to move to next cluster,
and doing so to the expected next position of cluster fails, then scan for a
next cluster from present position and resume from there.
Fixes#620790.
If some bits out of place in block(group) parsing, forego and move to next.
Also skip large blocks in pull mode, but need to give up in push mode.
Fixes#626463.
Improves #620790.
That is, in files that have no index (Cue), perform seek by scanning for
nearest cluster with timecode before requested position. Scanning is done
as a combination of interpolation and sequential scan.
Fixes#617368.
So matroska's Block structure has no keyframe flag, only the SimpleBlock has it.
To detect keyframes in Blocks, it is just the BlockGroup container that needs
to have a ReferenceBlock attached if it is a delta frame in video.
Start cluster at every keyframe or when we would overflow the previous
cluster's relative timestamp field. This would avoid as much as possible
starting clusters at non-keyframes.
This allows us to skip delta units earlier and is a bit clearer in my
opinion. It also makes only video buffers ever be delta units, not
just for SimpleBlock as before.
When the keyframe bit of SimpleBlock Flags wasn't set, the buffer was being
marked with GST_BUFFER_FLAG_DELTA_UNIT, causing all buffers to be skipped
after a seek. This may be a problem with the Sorenson Squish encoder, but
arguably the keyframe bit should only be applied to video.
Fixes bug #620358.
In demuxer and muxer use the gst_util_uint64 scaling functions rather than
standard integer division. Add warnings (to be changed to debug) for debugging
the timestamp and duration.
Specifically, this reduces pushing several small buffers for each
data buffer and also avoids a seek for each buffer altogether
(though a seek is still needed for each cluster).
Fixes#619273.
Before, vp8dec had no option but to decode all frames even if some/all
of them would be late. With this change, performance when keyframes are
frequent is helped a great deal. On my Thinkpad X60s, decoding a 20 s
1080p sunflower encode with keyframes every 10 frames went from taking
42 s with 5 frames shown to 21 s with 15 frames shown (still slow
enough to count by hand). When keyframes are more sparse, you will
still be able to catch up eventually, but the results won't be as
noticable.
Add webm typefinder just for the release, so webm works for
people whose distros don't patch gst-plugins-base as well.
We'll remove this again after the release.
In this day and age this should be safe. There's otherwise a risk people
will be creating unneccessarily big WebM files as they can't use
SimpleBlock in v1.
The original plan was to let WebM v1 be the same as Matroska v2 (with
extra constraints), but for simplicity it was decided to handle the
versions equally, such that e.g. SimpleBlock is only allowed in WebM v2.
Failure to do this for corrupt input can cause a subbuffer bigger
than the actual buffer to be created, quickly leading to segfault.
Test case:
bug_s222005751_r0.001____memcpy.webm
The comment says this cannot happen, but it did and I don't know
why. This is not the correct fix, needs investigation. Test case:
bug_s555010094_r0.0005:0.008____IA__g_assertion_message_expr.webm
This was triggering an UTF-8 assertion in gst_caps_set_simple for
corrupt files with garbage as codec id. Test case:
gstreamer_error_trying_to_set_invalid_utf8_as_codec_id.webm
Old gst_ebml_read_ascii renamed to gst_ebml_read_string, also used by
gst_ebml_read_utf8. Unlike for UTF-8, failure to validate is an error,
as gst_ebml_read_ascii is used for reading doctype and codec id and we
might just as well give up early in those cases.
Because GstMatroskaTrackContext *stream is set up in the first
SimpleBlock or Block, a rogue CodecState otherwise causes a segfault on
derefencing the NULL pointer. Test case:
bug_s5506167_r0.001____gst_matroska_demux_parse_blockgroup_or_simpleblock.webm
Remove BITMAPINFOHEADER and use the one from riff-lib. Also remove the
WAVEFORMATEX_SIZE define and use a sizeof together with the respective struct.
Besides better code reuse this lessens the ununsed symbols in the docs.
Changing it to the newest timestamp that was ever pushed will
increase the segment start in 500ms jumps, which could be just
after the next sparse stream buffer. E.g.
Video at 1.0s, sparse stream at 0.5s would jump the
sparse stream to 1.0s. Now a new sparse stream buffer could
appear that has a timestamp of 0.9s and this would be
dropped for no good reason because of bad luck.
As a side effect, avoid sending newsegment updates with start times
that go back and forth, which leads to bogus downstream running_time.
Also fixes seeking in bug #606744.
.. by initializing streams starting at 0, as that is basically
where we 'seek to' at the start and assume streams to start elsewhere.
Also enables newsegment update events for subtitle streams.
Added the 'min-index-interval' property to matroskamux,
which determines how much time (nanoseconds) is left
between keyframes stored in the index.
Fixes#583985.
Matroska uses three-letter ISO 639-2B codes, but GST_TAG_LANGUAGE is
supposed to contain two-letter ISO 639-1 codes, so use new language
code mapping functions in -base to convert between those two as
needed.
Fixes#505823.
Send pending tags only from the streaming thread, just after we've sent
the newsegment event, not with e.g. flush-start. This not only does the
right thing, but also makes sure we're not trampling over variables set
up in the streaming thread from the seeking thread in case someone tries
to issue a seek just as the demuxer is parsing the headers.
Fixes#601617. Spotted by Ognyan Tonchev.
At the end, Dirac streams have an EOS packet with 0 length.
Don't ever sit in an infinite loop when processing one. Allows
muxing Dirac into mkv to complete successfully.
Don't leak buffers when resyncing to a keyframe.
Avoid leaking buffers when exiting the loop on error conditions.
Add some more debug info.
Fixes#585911
First of all a keyframe seek should be done to the
keyframe right before the requested position and not
to the keyframe that is nearest to the requested position.
Use per track index arrays and use our new binary search function
from core to speed up the search.
Not all Matroska files have a Tags element which contains
information about the title among other things. Most video
Matroska files only contain the Title element so we
should parse this too. Fixes bug #570435.
Link to properties. Correct titles for examples. Document a few trivial cases. Keep lists in section file and docs/plugins/Makefile.am alphabetically ordered. Fix warnings that gtk-doc points out.
Original commit message from CVS:
* gst/matroska/matroska-demux.c: (gst_matroska_demux_video_caps):
* gst/matroska/matroska-mux.c: (gst_matroska_mux_video_pad_setcaps):
Some cleanups, refactoring and minor enhancements in caps handling.
* gst/matroska/matroska-mux.c: (gst_matroska_mux_class_init),
(gst_matroska_mux_init), (gst_matroska_pad_reset),
(gst_matroska_pad_free), (gst_matroska_mux_reset),
(gst_matroska_mux_video_pad_setcaps),
(gst_matroska_mux_request_new_pad):
* tests/check/elements/matroskamux.c: (teardown_src_pad):
Only remove, release or reset what is appropriate upon state change.
Original commit message from CVS:
* gst/matroska/matroska-mux.c: (gst_matroska_mux_reset),
(gst_matroska_mux_handle_sink_event), (gst_matroska_mux_finish):
* gst/matroska/matroska-mux.h:
Remove internal taglist and fully use tagsetter interface.
Original commit message from CVS:
* gst/matroska/matroska-demux.c: (gst_matroska_demux_audio_caps):
* gst/matroska/matroska-ids.h:
Make mkvdemux aware of E-AC3.
Original commit message from CVS:
* gst/matroska/matroska-mux.c:
(gst_matroska_mux_handle_dirac_packet):
Fix muxing of Dirac streams if the input already has the format
we need, i.e. is the output of matroskademux.
Original commit message from CVS:
* gst/matroska/matroska-ids.h:
* gst/matroska/matroska-mux.c: (gst_matroska_pad_free),
(gst_matroska_mux_handle_dirac_packet),
(gst_matroska_mux_write_data):
Implement Dirac muxing into Matroska comforming to the spec, i.e.
put all Dirac packages up to a picture into a Matroska block.
TODO: Implement writing of the ReferenceBlock Matroska elements,
currently the Dirac muxing is only 100% correct if Matroska version 2
is selected for muxing.
Original commit message from CVS:
Patch by: Peter Kjellerstedt <pkj at axis com>
* gst/matroska/matroska-mux.c: (gst_matroska_mux_reset),
(gst_matroska_mux_request_new_pad), (gst_matroska_mux_release_pad):
Fix a memory leak when pads are requested but the pipeline never
goes into PLAYING.
Correctly remove request pads, no matter if they have collected
data or not.
Fixes bug #557710.
Original commit message from CVS:
* gst/matroska/matroska-demux.c: (gst_matroska_demux_send_event),
(gst_matroska_demux_video_caps), (gst_matroska_demux_audio_caps):
* gst/matroska/matroska-mux.c:
(gst_matroska_mux_video_pad_setcaps),
(gst_matroska_mux_audio_pad_setcaps), (gst_matroska_mux_finish):
Add Real[Audio|Video] support to Matroska containers.
It works fine for:
* decoding real audio/video streams contained in mkv
* 'transmuxing' real (.rm) files into .mkv files
It will not work though for encoding real[audio/video] streams that
don't contain the 'mdpr_data' extra data on the caps.
The reason why this will not work is because I never intended to
duplicate virtually all the 'mdpr' block creation into mkvmux.
Fixes#536067
Original commit message from CVS:
* gst/matroska/ebml-read.c: (gst_ebml_read_element_id),
(gst_ebml_read_element_length), (gst_ebml_read_uint),
(gst_ebml_read_sint), (gst_ebml_read_float),
(gst_ebml_read_header):
Change some GST_ELEMENT_ERRORs to GST_ERROR_OBJECT to make it
possible to ignore errors and not post any ERROR messages on
the bus.
* gst/matroska/matroska-demux.c:
(gst_matroska_demux_parse_contents):
Ignore any errors and not just EOS when parsing the contents of
a SeekHead. Errors here are usually caused by truncated files
and playback of the file works fine. Fixes playback of the
audio_only_chapter_seekbroken.mka file from the MPlayer samples
archive.
Original commit message from CVS:
* gst/matroska/matroska-demux.c:
(gst_matroska_demux_parse_blockgroup_or_simpleblock):
If the duration of a block is unknown only use the timestamp for the
first lace and use GST_CLOCK_TIME_NONE as duration for the following
laces. Otherwise every lace has the same timestamp which leads to
various problems. Really fixes bug #548831.
Original commit message from CVS:
* gst/matroska/matroska-demux.c: (gst_matroska_demux_add_stream):
Don't calculate the default duration of a frame from the audio sampling
rate. This only works for raw audio if every frame contains a single
sample and results in broken buffer durations for other formats
if no specified default duration is given or the blocks have no
duration. Fixes bug #548831.
Original commit message from CVS:
* gst/matroska/matroska-demux.c:
(gst_matroska_demux_parse_blockgroup_or_simpleblock):
Allow zero sized blocks instead of returning GST_FLOW_OK. Such blocks
are used for text/plain subtitles as a gap-filler in some files.
Original commit message from CVS:
* gst/matroska/matroska-mux.c:
(gst_matroska_mux_handle_sink_event),
(flac_streamheader_to_codecdata):
We need to drop one additional buffer for FLAC as the fLaC
marker and STREAMINFO block are merged into one buffer in the caps.
Also don't pretend to support NEWSEGMENT events, otherwise we
will most probably write some invalid data.
Original commit message from CVS:
* gst/matroska/matroska-mux.c: (flac_streamheader_to_codecdata),
(gst_matroska_mux_audio_pad_setcaps):
Add support for muxing FLAC into Matroska containers.
Fixes bug #311586.
Original commit message from CVS:
* gst/matroska/matroska-demux.c: (gst_matroska_demux_reset),
(gst_matroska_demux_element_send_event),
(gst_matroska_demux_handle_seek_event), (gst_matroska_demux_loop):
* gst/matroska/matroska-demux.h:
Close the current segment if we're doing a non-flushing seek and send
the close-segment and the new segment of the seek from the streaming
thread.
Original commit message from CVS:
* gst/matroska/matroska-demux.c: (gst_matroskademux_do_index_seek),
(gst_matroska_demux_element_send_event),
(gst_matroska_demux_handle_seek_event),
(gst_matroska_demux_handle_src_event):
When receiving a SEEK event on a specific pad first search for a seek
table entry for the stream of the pad and then fall back to an entry
for a different stream.
Original commit message from CVS:
* configure.ac:
* gst/matroska/matroska-ids.c: (gst_matroska_register_tags):
* gst/matroska/matroska-ids.h:
Build depend on core CVS for the attachment tag.
Original commit message from CVS:
* configure.ac:
* gst/matroska/Makefile.am:
* gst/matroska/lzo.c: (get_byte), (get_len), (copy),
(copy_backptr), (lzo1x_decode), (main):
* gst/matroska/lzo.h:
* gst/matroska/matroska-demux.c:
(gst_matroska_demux_read_track_encoding),
(gst_matroska_decompress_data), (gst_matroska_decode_data),
(gst_matroska_decode_buffer),
(gst_matroska_decode_content_encodings),
(gst_matroska_demux_read_track_encodings),
(gst_matroska_demux_add_stream),
(gst_matroska_demux_parse_blockgroup_or_simpleblock):
* gst/matroska/matroska-ids.h:
Decode the codec private data and following ContentEncoding if
necessary.
Support bzip2, lzo and header stripped compression. For lzo use the
ffmpeg lzo implementation as liblzo is GPL licensed.
Fix zlib decompression.
Original commit message from CVS:
* gst/matroska/matroska-mux.c:
(gst_matroska_mux_audio_pad_setcaps):
Fix muxing of MP3/MP2 with different MPEG versions by calculating the
duration of a frame with the new mpegaudioversion caps field.
Original commit message from CVS:
* gst/matroska/matroska-demux.c: (gst_matroska_demux_finalize),
(gst_matroska_demux_class_init), (gst_matroska_demux_init),
(gst_matroska_demux_combine_flows), (gst_matroska_demux_reset),
(gst_matroska_demux_stream_from_num),
(gst_matroska_demux_tracknumber_unique),
(gst_matroska_demux_add_stream), (gst_matroska_demux_send_event),
(gst_matroska_demux_handle_seek_event),
(gst_matroska_demux_sync_streams),
(gst_matroska_demux_parse_blockgroup_or_simpleblock),
(gst_matroska_demux_loop):
* gst/matroska/matroska-demux.h:
Allow an infinite number of stream inside Matroska containers and use
a GPtrArray for storing them instead of allowing "only" 127 streams.
Original commit message from CVS:
* gst/matroska/matroska-demux.c:
(gst_matroska_demux_loop_stream_parse_id):
If no Tracks are found error out instead of trying it again until the
end of time.
Original commit message from CVS:
* gst/matroska/matroska-demux.c: (gst_matroska_demux_audio_caps):
Fix demuxing of raw integer audio. The samples are unsigned only for 8
bit and signed otherwise, not the other way around.
Original commit message from CVS:
* gst/matroska/matroska-mux.c:
(gst_matroska_mux_audio_pad_setcaps):
Add support for muxing raw float audio now that the spec defines the
endianness and add support for muxing raw integer audio with 24 and
32 bits.
Allow muxing of more than 8 audio channels.
Original commit message from CVS:
* gst/matroska/matroska-mux.c: (gst_matroska_mux_create_uid),
(gst_matroska_mux_reset), (gst_matroska_mux_start):
Add locking to the global array of used track UIDs to prevent random
crashes if more than a single matrosmux instance is used.
Use 64 bit values for the track UIDs.
Use the global GRandom of GLib instead of creating our own one
for the few random numbers we need every single time.
Original commit message from CVS:
* gst/matroska/matroska-demux.c: (gst_matroska_demux_class_init),
(gst_matroska_demux_add_stream), (gst_matroska_demux_query),
(gst_matroska_demux_element_query),
(gst_matroska_demux_handle_src_query),
(gst_matroska_demux_handle_seek_event):
Handle position and duration query in DEFAULT format if the
pad's track has a default frame duration set.
Fix seeking now that the segment's duration doesn't contain the
(possibly wrong or inaccurate) duration of the Matroska file.
Original commit message from CVS:
* gst/matroska/ebml-read.c: (_ext2dbl):
Use NAN constant instead of 0.0/0.0 if possible. NAN is defined
in math.h except on MSVC where it is defined in xmath.h.
Fixes compilation with MSVC.
Original commit message from CVS:
* gst/matroska/matroska-demux.c: (gst_matroska_demux_reset),
(gst_matroska_demux_handle_src_query),
(gst_matroska_demux_parse_info),
(gst_matroska_demux_loop_stream_parse_id):
* gst/matroska/matroska-demux.h:
Don't set the segment duration to the duration from the Matroska
header as this value could be wrong and is just informational.
Original commit message from CVS:
* gst/matroska/matroska-demux.c:
(gst_matroska_demux_loop_stream_parse_id):
If no Tracks element is found until the first Cluster is found
search it and error out if none is found in the complete file.
Original commit message from CVS:
* gst/matroska/matroska-demux.c: (gst_matroska_demux_sync_streams):
Resync non-subtitle tracks too if a too large gap compared to other
tracks is detected.
Original commit message from CVS:
2008-06-23 Julien Moutte <julien@fluendo.com>
* gst/matroska/matroska-demux.c:
(gst_matroska_demux_read_track_encoding),
(gst_matroska_demux_parse_blockgroup_or_simpleblock): Fix buggy
format strings in macros. (makes it build on OS X again...)
Original commit message from CVS:
* gst/matroska/matroska-demux.c:
(gst_matroska_demux_add_wvpk_header),
(gst_matroska_demux_audio_caps):
* gst/matroska/matroska-ids.h:
Fix demuxing of WavPack files. Muxing is still broken.
Original commit message from CVS:
* gst/matroska/matroska-demux.c: (gst_matroska_track_free),
(gst_matroska_demux_add_mpeg_seq_header),
(gst_matroska_demux_add_wvpk_header),
(gst_matroska_demux_check_subtitle_buffer),
(gst_matroska_demux_parse_blockgroup_or_simpleblock),
(gst_matroska_demux_video_caps), (gst_matroska_demux_audio_caps),
(gst_matroska_demux_subtitle_caps):
* gst/matroska/matroska-ids.h:
Add a "vfunc" to the track context for postprocessing frames and
convert the wavpack and subtitle postprocessing to this vfunc.
Copy buffer flags in those functions to the new buffers too.
Parse CodecState elements of Blocks.
Add a postprocessing function for MPEG video that adds the sequence
header from the codec private data or codec state to the frames if
it's not already there.
Original commit message from CVS:
* gst/matroska/matroska-demux.c:
(gst_matroska_demux_parse_blockgroup_or_simpleblock):
If a gap of more than 1/2 second is found in one stream send a
NEWSEGMENT event to not stall the pipeline if the gap is too large.
This also fixes Matroska files where the first buffer doesn't start
at timestamp 0. Fixes bug #429322.
The duration of a block is the default duration multiplied with the
number of laces. Every lace is one frame and the default duration
is the duration of one frame. This fixes playback of files that use
lacing for some tracks.
