| 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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avpicture_get_size() -> av_image_get_buffer_size()
Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>
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Also reshuffle headers into canonical order where appropriate.
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Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
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Signed-off-by: Martin Storsjö <martin@martin.st>
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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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AVFormatParameters are converted into corresponding private options in
av_open_input_file/stream() compat wrappers, so accessing them from
demuxers is redundant.
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Show the invalid string in the error message.
While at it also prefer "Could not" over "Couldn't", plain forms are
preferred over contractions (simplify readability, especially for non
English-savvy people).
Signed-off-by: Anton Khirnov <anton@khirnov.net>
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It's simpler and less error-prone.
Fixes some memleaks along the way.
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This fixes warnings about avcodec_get_pix_fmt_name() being deprecated.
Signed-off-by: Diego Biurrun <diego@biurrun.de>
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Add a forgotten comma and move options/class definition outside of
HAVE_LIBDC1394_1.
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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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Patch by Jean-Daniel Dupas, devlists shadowlab org
Originally committed as revision 22744 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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and remove all ENABLE_ definitions.
Originally committed as revision 16600 to svn://svn.ffmpeg.org/ffmpeg/trunk
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Originally committed as revision 14372 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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Originally committed as revision 13098 to svn://svn.ffmpeg.org/ffmpeg/trunk
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Originally committed as revision 12450 to svn://svn.ffmpeg.org/ffmpeg/trunk
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sappia at ngi dot it
Originally committed as revision 11502 to svn://svn.ffmpeg.org/ffmpeg/trunk
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ngi dot it
Originally committed as revision 11501 to svn://svn.ffmpeg.org/ffmpeg/trunk
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Originally committed as revision 11461 to svn://svn.ffmpeg.org/ffmpeg/trunk
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Originally committed as revision 11077 to svn://svn.ffmpeg.org/ffmpeg/trunk
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