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24 Commits

Author SHA1 Message Date
Anton Khirnov 9200514ad8 lavf: replace AVStream.codec with AVStream.codecpar 
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.
 2016-02-23 17:01:58 +01:00
Anton Khirnov a4ed995cab txd: do not set the codec timebase. 
It is not supposed to be changed from outside of lavc.
Set the stream timebase and average framerate instead.
 2014-04-22 07:44:16 +02:00
Anton Khirnov 36ef5369ee Replace all CODEC_ID_* with AV_CODEC_ID_* 2012-08-07 16:00:24 +02:00
Anton Khirnov 6e9651d106 lavf: remove AVFormatParameters from AVFormatContext.read_header signature 2012-01-27 10:51:57 +01:00
Anton Khirnov 3b3bbdd3e6 lavf,lavd: replace av_new_stream->avformat_new_stream part I. 
Trivial replacements with sed are done in this commit:
sed 's/av_new_stream(\([^)]*\), 0)/avformat_new_stream(\1, NULL)/'
 2011-10-19 17:02:11 +02:00
Diego Biurrun 30b4ee7901 Use explicit struct initializers for AVOutputFormat/AVInputFormat declarations. 2011-09-24 12:11:17 +02:00
Mans Rullgard 2912e87a6c Replace FFmpeg with Libav in licence headers 
Signed-off-by: Mans Rullgard <mans@mansr.com>
 2011-03-19 13:33:20 +00:00
Anton Khirnov 45a8a02a41 lavf: replace avio_seek(SEEK_CUR) with avio_skip where it makes sense 
Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>
 2011-03-16 22:24:51 -04:00
Anton Khirnov 66e5b1df36 avio: deprecate url_feof 
AVIOContext.eof_reached should be used directly instead.

Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>
 2011-03-07 17:20:31 -05:00
Anton Khirnov e356fc57a2 lavf: replace all uses of url_fskip with avio_seek 
Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>
 2011-03-01 12:22:16 -05:00
Anton Khirnov b7effd4e83 avio: avio_ prefixes for get_* functions 
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>
 2011-02-21 11:23:22 -05:00
Anton Khirnov ae628ec1fd avio: rename ByteIOContext to AVIOContext. 
Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>
 2011-02-20 08:37:15 -05:00
Diego Elio Pettenò c6610a216e Prefix all _demuxer, _muxer, _protocol from libavformat and libavdevice. 
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.
 2011-01-26 22:10:09 +00:00
Stefano Sabatini 72415b2adb Define AVMediaType enum, and use it instead of enum CodecType, which 
is deprecated and will be dropped at the next major bump.

Originally committed as revision 22735 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2010-03-30 23:30:55 +00:00
Reimar Döffinger d14f5391c1 Use more appropriate return values in txd demuxer. 
Originally committed as revision 22703 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2010-03-27 19:10:24 +00:00
Benoit Fouet 9aaa2077e5 Add a context to av_log() calls. 
Originally committed as revision 17775 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2009-03-03 16:19:37 +00:00
Diego Biurrun 517ac2434b Use more descriptive format long_names. 
Originally committed as revision 17184 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2009-02-12 17:26:06 +00:00
Diego Biurrun 6a5d31ac25 Fix build: Add intreadwrite.h and bswap.h #includes where necessary. 
Originally committed as revision 16556 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2009-01-11 22:19:48 +00:00
Baptiste Coudurier 9b64a036c0 remove useless close funcs 
Originally committed as revision 13835 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2008-06-19 23:25:04 +00:00
Stefano Sabatini bde15e74de Make long_names in lavf/lavdev optional depending on CONFIG_SMALL. 
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
 2008-06-03 16:20:54 +00:00
Björn Axelsson 899681cd1d Use dynamically allocated ByteIOContext in AVFormatContext 
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
 2007-11-21 07:41:00 +00:00
Panagiotis Issaris 6f3e0b2174 Replace all occurrences of AVERROR_IO with AVERROR(EIO). 
Originally committed as revision 9760 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2007-07-19 15:23:32 +00:00
Panagiotis Issaris 769e10f068 Replace all occurrences of AVERROR_NOMEM with AVERROR(ENOMEM). 
Originally committed as revision 9759 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2007-07-19 15:21:30 +00:00
Ivo van Poorten cb63173785 Renderware TXD demuxer 
Originally committed as revision 8927 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2007-05-07 13:30:08 +00:00