Formerly, it was only possible to create instances of
the Track subclasses, VideoTrack and AudioTrack. However,
we now populate WebM files with WebVTT metadata blocks,
so we must allow for a third kind of track object.
We now enable instances of type Track to be created,
by providing a new factory function, Track::Create, and
making all Track methods non-pure and with a generic
implementation.
Change-Id: I7d4c965eb566b9fc2f5ceefe1d43723cf8c1e5f0
- Added ContentEncAESSettings, AESSettingsCipherMode,
AESSettingsCipherInitData elements to the parser and muxer.
- Changed ParseContentEncodingsEntry, ParseContentEncodingEntry,
and ParseEncryptionEntry to use PasreElementHeader.
- Added ParseContentEncAESSettingsEntry function.
- PS6 removed AESSettingsCipherInitData.
- PS9 Addressed comments, Fixed some LINT issues, and converted
mkvwriter.h/.cpp to Unix line endings.
- PS10 Addressed comments.
Change-Id: I9d96a0c194f74a6c9bf0001aa0286196e410f07e
In several cases, the parser would parse a header
(say, a track header, or the segment info header)
in the constructor for the type. The parser had
assumed (incorrectly) that the file was well-formed,
but this turned out to be an incorrect assumption.
The parse errors triggered some assertion failures,
but this is not acceptable in a production system.
The parser solved that problem by separating the
construction of the header object from the parsing
of the file. There is now a separate parse method
to be called after construction of the object,
which returns a status whether the parse was
successful.
This change fixes the bugs from the following
tracker issues:
http://code.google.com/p/webm/issues/detail?id=399http://code.google.com/p/webm/issues/detail?id=400
Change-Id: Idb09154ae7008429d8613ce3b3e8294f5a12de86
Previously, parsing of a Block element was done inside its
constructor. Parsing errors were handled via assertion checks,
but this only works in practice if there are no actual errors
in the file.
We did come across a file, however, that used EMBL-style lacing,
but the lacing was done incorrectly and so the parse asserted.
This isn't acceptable for a production system, and more a graceful
handling of parse errors was needed.
The code was restructured such that the Block object's ctor does
only trivial initialization of member variables. A separate Parse
method was added, that is called after the object is constructed.
If the parse succeeds all is well, otherwise the object is destroyed
and the error is reported to the caller.
This commit fixes bug tracker issue #398, described here:
http://code.google.com/p/webm/issues/detail?id=398
Change-Id: Ib95ca95d0eec08cf670b308c461e42ed8345e890
Added support for the ContentEncoding element to be added to a
Track element for muxing. Currently only one ContentEncoding may
be added. The ContentEncoding must be encryption of the whole
frame with AES.
Added support for parsing the ConentEncoding elements. Currently
the parser does not parse any ContentCompression elements.
Change-Id: Ie199116a1bcc18a0c2b5eea3dba6622887c108c8
Cluster, Cues, and CuePoint. The information was needed for some
tools bieng worked on. Element start is byte offset of the EMBL ID's
first byte.
Change-Id: I64e0a48932630e0a5269418f4979487d6d7bce60
