| 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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This applies to every library where performance is not critical.
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Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>
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Remove the header decoding for PCM audio from mpeg.c and the
20/24bit parts from pcm.c and merge them into a new decoder in
pcm-dvd.c.
The decoder has added support for samples that span multiple
packets and modified 20/24bit group decoding. Both is needed to
decode samples that have been generated with DVD-Lab Pro 2. The
decoding of 16bit PCM and two channel 24bit is identical to
before. No other samples are known to verify the correctness of
the encoding this software does.
The complete list of tested formats is
48kHz/16bit/2-8 channels
48kHz/24bit/2-5 channels
96kHz/16bit/2-4 channels
96kHz/24bit/2 channels
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
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Also add missing trailing commas, break long codec_tag lines and
add spaces in codec_tag declarations.
Signed-off-by: Martin Storsjö <martin@martin.st>
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Manual replacements are done in this commit.
In many cases, the id is some constant made up number (e.g. 0 for video
and 1 for audio), which is then not used in the demuxer for anything.
Those ids are removed.
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pack_start_code.
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It's more readable and less prone to breakage.
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Use it instead of url_is_streamed and AVIOContext.is_streamed.
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Signed-off-by: Mans Rullgard <mans@mansr.com>
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Signed-off-by: Ronald S. Bultje <rsbultje@gmail.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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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: Ronald S. Bultje <rsbultje@gmail.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 23904 to svn://svn.ffmpeg.org/ffmpeg/trunk
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Patch by Janne Grunau, janne-ffmpeg jannau net
Originally committed as revision 23286 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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fixes issue1729
Originally committed as revision 21738 to svn://svn.ffmpeg.org/ffmpeg/trunk
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Originally committed as revision 21604 to svn://svn.ffmpeg.org/ffmpeg/trunk
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Originally committed as revision 20763 to svn://svn.ffmpeg.org/ffmpeg/trunk
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have
been wrong.
Fixes issue1571.
Originally committed as revision 20762 to svn://svn.ffmpeg.org/ffmpeg/trunk
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Patch by tralph11, tralph11 yahoo
Originally committed as revision 20333 to svn://svn.ffmpeg.org/ffmpeg/trunk
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Originally committed as revision 19854 to svn://svn.ffmpeg.org/ffmpeg/trunk
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Originally committed as revision 19852 to svn://svn.ffmpeg.org/ffmpeg/trunk
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Originally committed as revision 18577 to svn://svn.ffmpeg.org/ffmpeg/trunk
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Originally committed as revision 18045 to svn://svn.ffmpeg.org/ffmpeg/trunk
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positive uninitialized variable warning.
Originally committed as revision 17825 to svn://svn.ffmpeg.org/ffmpeg/trunk
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Fixes issue 725: MPEG2 PS with PCM audio.
On behalf of Jai.
Originally committed as revision 17150 to svn://svn.ffmpeg.org/ffmpeg/trunk
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identifying MP3 files with padding or garbage at the beginning.
Originally committed as revision 17091 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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Patch by Diego 'Flameeyes' Pettenò: flameeyes gmail
Originally committed as revision 15517 to svn://svn.ffmpeg.org/ffmpeg/trunk
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