Implement support for the packed video formats WebM
uses, not all the values that Matroska might use.
In practice, it's really hard to find any samples in the
wild of any.
Supported in both the muxer and demuxer.
New tags can be found on different parts of the file, so this patch
keeps the stream taglists around for the life cycle of the pad
and adds those new tags as found. Then a new tag is found, the
pad's is marked with a tags changed flag, making the element push
a new tag event on the next check. Before this, we were sending
only the newly found tags, as the element was losing its taglist
when pushing the event.
This is meant to be so (https://wiki.xiph.org/MatroskaOpus - while
it is marked as a draft, this part was confirmed to be correct on
IRC), and allows one to determine whether a demuxed stream is
multistream or not, and thus set the multistream caps field
accordingly. In turn, this means downstream does not have to guess.
https://bugzilla.gnome.org/show_bug.cgi?id=740744
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.
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:
* gst/matroska/matroska-demux.c: (gst_matroska_demux_reset),
(gst_matroska_demux_stream_from_num),
(gst_matroska_demux_encoding_cmp),
(gst_matroska_demux_encoding_order_unique),
(gst_matroska_demux_read_track_encoding),
(gst_matroska_demux_read_track_encodings),
(gst_matroska_demux_tracknumber_unique),
(gst_matroska_demux_add_stream), (gst_matroska_demux_init_stream),
(gst_matroska_demux_parse_tracks),
(gst_matroska_demux_parse_index_cuetrack),
(gst_matroska_demux_parse_index_pointentry),
(gst_matroska_demux_parse_index), (gst_matroska_demux_parse_info),
(gst_matroska_demux_parse_metadata_id_simple_tag),
(gst_matroska_demux_parse_metadata_id_tag),
(gst_matroska_demux_parse_metadata),
(gst_matroska_demux_parse_attached_file),
(gst_matroska_demux_parse_attachments),
(gst_matroska_demux_parse_chapters),
(gst_matroska_demux_sync_streams), (gst_matroska_decode_buffer),
(gst_matroska_demux_parse_blockgroup_or_simpleblock),
(gst_matroska_demux_parse_cluster),
(gst_matroska_demux_parse_contents_seekentry),
(gst_matroska_demux_parse_contents),
(gst_matroska_demux_loop_stream_parse_id),
(gst_matroska_demux_loop):
Improve debug output everywhere and fix the EOS logic.
Check the values of the ContentEncoding elements more strictly and
don't use tracks for which it's invalid.
Check that the track number is unique for this stream.
Check that seek positions are below G_MAXINT64 as our seeks are
int64-based and overflows will fail badly.
After seeks also don't push SimpleBlocks until the first one
containing a keyframe is found. Before this was done only for normal
Blocks.
Update some FIXME/TODOs.
* gst/matroska/ebml-read.c: (gst_ebml_read_peek_bytes),
(gst_ebml_read_utf8), (gst_ebml_read_header):
Improve debug output.
* gst/matroska/matroska-ids.c:
(gst_matroska_track_init_video_context):
* gst/matroska/matroska-ids.h:
* gst/matroska/matroska-mux.c:
(gst_matroska_mux_video_pad_setcaps):
Remove eye mode and don't parse it anymore. We can't use that
information in GStreamer yet so it's useless.
Original commit message from CVS:
* gst/matroska/Makefile.am:
* gst/matroska/matroska-demux.c: (gst_matroska_demux_reset),
(gst_matroska_demux_parse_attached_file),
(gst_matroska_demux_parse_attachments),
(gst_matroska_demux_parse_contents_seekentry),
(gst_matroska_demux_loop_stream_parse_id):
* gst/matroska/matroska-demux.h:
* gst/matroska/matroska-ids.c: (gst_matroska_register_tags):
* gst/matroska/matroska-ids.h:
* gst/matroska/matroska.c: (plugin_init):
Parse Attachments and post them as GST_TAG_IMAGE if we detect
it as image and otherwise as GST_TAG_ATTACHMENT. Include filename
and description of the attachments in the caps. Fixes bug #537622.
Original commit message from CVS:
* gst/matroska/ebml-write.c: (gst_ebml_write_float):
Use GDOUBLE_TO_BE() instead of (probably slower) custom code.
* gst/matroska/matroska-demux.c: (gst_matroska_demux_base_init),
(gst_matroska_demux_class_init), (gst_matroska_demux_init),
(gst_matroska_track_free), (gst_matroska_demux_encoding_cmp),
(gst_matroska_demux_read_track_encodings),
(gst_matroska_demux_add_stream),
(gst_matroska_demux_handle_src_query),
(gst_matroska_demux_init_stream),
(gst_matroska_demux_parse_index_cuetrack),
(gst_matroska_demux_parse_index_pointentry),
(gst_matroska_demux_parse_info),
(gst_matroska_demux_parse_metadata_id_simple_tag),
(gst_matroska_demux_parse_metadata),
(gst_matroska_demux_add_wvpk_header), (gst_matroska_decode_buffer),
(gst_matroska_demux_parse_blockgroup_or_simpleblock),
(gst_matroska_demux_parse_cluster),
(gst_matroska_demux_parse_contents_seekentry),
(gst_matroska_demux_loop_stream_parse_id),
(gst_matroska_demux_loop), (gst_matroska_demux_video_caps),
(gst_matroska_demux_audio_caps),
(gst_matroska_demux_subtitle_caps):
* gst/matroska/matroska-demux.h:
* gst/matroska/matroska-ids.c:
(gst_matroska_track_init_subtitle_context):
* gst/matroska/matroska-ids.h:
* gst/matroska/matroska-mux.c: (gst_matroska_mux_base_init),
(gst_matroska_mux_class_init), (gst_matroska_mux_init),
(gst_matroska_mux_create_uid), (gst_matroska_mux_reset),
(gst_matroska_mux_video_pad_setcaps),
(gst_matroska_mux_audio_pad_setcaps),
(gst_matroska_mux_subtitle_pad_setcaps),
(gst_matroska_mux_request_new_pad),
(gst_matroska_mux_track_header), (gst_matroska_mux_start),
(gst_matroska_mux_write_simple_tag), (gst_matroska_mux_finish),
(gst_matroska_mux_write_data), (gst_matroska_mux_collected),
(gst_matroska_mux_set_property):
Add many FIXMEs/TODOs all over the matroska muxer and demuxer
elements, do some checks for valid values in the demuxer, handle
tracktimecodescale in the demuxer, set correct default values for all
settings in the demuxer, review and add all missing matroska
IDs and some more raw YUV formats, and some trivial cleanup.
Original commit message from CVS:
* gst/matroska/matroska-demux.c: (gst_matroska_demux_add_stream),
(gst_matroska_demux_video_caps):
* gst/matroska/matroska-ids.c:
(gst_matroska_track_init_video_context):
* gst/matroska/matroska-ids.h:
Try harder to extract the framerate for video tracks correctly and
save it directly instead of converting it back and forth a few
times. Mostly makes a difference for very small framerates (<1).
Fixes#380199.
Original commit message from CVS:
* gst/matroska/matroska-demux.c:
(gst_matroska_demux_check_subtitle_buffer),
(gst_matroska_demux_parse_blockgroup_or_simpleblock),
(gst_matroska_demux_subtitle_caps):
* gst/matroska/matroska-ids.c:
(gst_matroska_track_init_subtitle_context):
* gst/matroska/matroska-ids.h:
Try to fix up broken matroska files containing subtitle
streams with non-UTF8 character encodings (courtesy of
mkvmerge) using either the encoding specified in the
GST_SUBTITLE_ENCODING environment variable or the
current locale's character set if it is non-UTF8.
Fixes#337076.
Original commit message from CVS:
* gst/matroska/Makefile.am:
* gst/matroska/matroska-demux.c: (gst_matroska_demux_add_stream),
(gst_matroska_demux_handle_src_event):
* gst/matroska/matroska-ids.c:
(gst_matroska_track_init_video_context),
(gst_matroska_track_init_audio_context),
(gst_matroska_track_init_subtitle_context),
(gst_matroska_track_init_complex_context):
* gst/matroska/matroska-ids.h:
Handle case where the TrackType ebml chunk does not come before the
TrackInfoAudio or TrackInfoVideo ebml chunk (#339446). Ignore QoS
events.
