| Commit message (Collapse) | Author | Age |
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Currently, AVStream contains an embedded AVCodecContext instance, which
is used by demuxers to export stream parameters to the caller and by
muxers to receive stream parameters from the caller. It is also used
internally as the codec context that is passed to parsers.
In addition, it is also widely used by the callers as the decoding (when
demuxer) or encoding (when muxing) context, though this has been
officially discouraged since Libav 11.
There are multiple important problems with this approach:
- the fields in AVCodecContext are in general one of
* stream parameters
* codec options
* codec state
However, it's not clear which ones are which. It is consequently
unclear which fields are a demuxer allowed to set or a muxer allowed to
read. This leads to erratic behaviour depending on whether decoding or
encoding is being performed or not (and whether it uses the AVStream
embedded codec context).
- various synchronization issues arising from the fact that the same
context is used by several different APIs (muxers/demuxers,
parsers, bitstream filters and encoders/decoders) simultaneously, with
there being no clear rules for who can modify what and the different
processes being typically delayed with respect to each other.
- avformat_find_stream_info() making it necessary to support opening
and closing a single codec context multiple times, thus
complicating the semantics of freeing various allocated objects in the
codec context.
Those problems are resolved by replacing the AVStream embedded codec
context with a newly added AVCodecParameters instance, which stores only
the stream parameters exported by the demuxers or read by the muxers.
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Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>
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failures
When av_reallocp fails, the associated variables that keep track of
the number of elements in the array (and in some cases, the
separate number of allocated elements) need to be reset.
Not all of these might technically be needed, but it's better to
reset them if in doubt, to make sure variables don't end up
conflicting.
Signed-off-by: Martin Storsjö <martin@martin.st>
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Signed-off-by: Diego Biurrun <diego@biurrun.de>
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Reported-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC: libav-stable@libav.org
Signed-off-by: Martin Storsjö <martin@martin.st>
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Reported-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC: libav-stable@libav.org
Signed-off-by: Martin Storsjö <martin@martin.st>
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Reported-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC: libav-stable@libav.org
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
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Reported-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC: libav-stable@libav.org
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
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Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC: libav-stable@libav.org
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It's supposed to be called only from (de)muxers.
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Trivial replacements with sed are done in this commit:
sed 's/av_new_stream(\([^)]*\), 0)/avformat_new_stream(\1, NULL)/'
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Makes the code easier to understand.
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Signed-off-by: Martin Storsjö <martin@martin.st>
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Signed-off-by: Martin Storsjö <martin@martin.st>
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Signed-off-by: Anton Khirnov <anton@khirnov.net>
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It's more readable and less prone to breakage.
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Signed-off-by: Mans Rullgard <mans@mansr.com>
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AVIOContext.eof_reached should be used directly instead.
Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>
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Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>
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Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>
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In the name of consistency:
get_byte -> avio_r8
get_<type> -> avio_r<type>
get_buffer -> avio_read
get_partial_buffer will be made private later
get_strz is left out becase I want to change it later to return
something useful.
Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>
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Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>
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Signed-off-by: Mans Rullgard <mans@mansr.com>
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This also lists the objects from those two libraries as internal (by adding
the ff_ prefix) so that they can then be hidden via linker scripts.
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Originally committed as revision 24170 to svn://svn.ffmpeg.org/ffmpeg/trunk
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Other parts of FFmpeg use NE (native endian) rather than ME (machine).
This makes it consistent.
Originally committed as revision 24169 to svn://svn.ffmpeg.org/ffmpeg/trunk
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Patch by Alexei Svitkine, alexei dot svitkine at gmail
Originally committed as revision 23749 to svn://svn.ffmpeg.org/ffmpeg/trunk
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is deprecated and will be dropped at the next major bump.
Originally committed as revision 22735 to svn://svn.ffmpeg.org/ffmpeg/trunk
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Originally committed as revision 21538 to svn://svn.ffmpeg.org/ffmpeg/trunk
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Originally committed as revision 21537 to svn://svn.ffmpeg.org/ffmpeg/trunk
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demuxer.
Originally committed as revision 20429 to svn://svn.ffmpeg.org/ffmpeg/trunk
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Patch by Daniel Verkamp
($firstname) at (three-letter file extension for drivers in Win 3.1) dot (nu)
Thread: [PATCH] Smacker: Output audio in original bit depth
Originally committed as revision 18111 to svn://svn.ffmpeg.org/ffmpeg/trunk
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Originally committed as revision 16684 to svn://svn.ffmpeg.org/ffmpeg/trunk
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Originally committed as revision 16556 to svn://svn.ffmpeg.org/ffmpeg/trunk
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The name offset_t is easily confused with the standard off_t type and
*_t is POSIX reserved namespace if any POSIX header is included.
Originally committed as revision 15533 to svn://svn.ffmpeg.org/ffmpeg/trunk
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bits_per_coded_sample but that cannot be done seperately.
Patch by Luca Abeni
Also reset the minor version and fix the forgotton change to libfaad.
Note: The API/ABI should not be considered stable yet, there still may
be a change done here or there if some developer has some cleanup ideas and
patches!
Originally committed as revision 15262 to svn://svn.ffmpeg.org/ffmpeg/trunk
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patch by Stefano Sabatini, stefano.sabatini-lala poste.it
along with some spelling/consistency fixes for the long names by me
Originally committed as revision 13649 to svn://svn.ffmpeg.org/ffmpeg/trunk
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Extracted from a patch by Erik Hovland, erik hovland org.
Originally committed as revision 13531 to svn://svn.ffmpeg.org/ffmpeg/trunk
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Originally committed as revision 13098 to svn://svn.ffmpeg.org/ffmpeg/trunk
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patch by: Björn Axelsson, bjorn d axelsson a intinor d se
thread: [PATCH] Remove static ByteIOContexts, 06 nov 2007
Originally committed as revision 11071 to svn://svn.ffmpeg.org/ffmpeg/trunk
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This fixes issue 97.
Originally committed as revision 10192 to svn://svn.ffmpeg.org/ffmpeg/trunk
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Originally committed as revision 9760 to svn://svn.ffmpeg.org/ffmpeg/trunk
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