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28 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
Vittorio Giovara 059a934806 lavc: Consistently prefix input buffer defines 
Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>
 2015-07-27 15:24:59 +01:00
Diego Biurrun daf8cf358a avformat: Don't anonymously typedef structs 2015-02-14 10:13:47 -08:00
Diego Biurrun 1ecdf8912b avformat: av_log_ask_for_sample() ---> avpriv_request_sample() 2013-03-13 20:42:21 +01:00
Diego Biurrun a4472ac01e Add informative messages to av_log_ask_for_sample calls lacking them 2013-03-12 11:09:45 +01:00
Diego Biurrun 8f10f1a6dc anm: Get rid of some very silly goto statements 2013-03-12 11:05:28 +01:00
Diego Biurrun f3298f1299 Return proper error code after av_log_ask_for_sample() 2012-12-23 18:56:56 +01:00
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 3a7f7678eb lavf: deprecate av_close_input_stream(). 
And remove all its uses.
 2011-12-12 20:21:47 +01:00
Anton Khirnov c3f9ebf743 lavf: make av_set_pts_info private. 
It's supposed to be called only from (de)muxers.
 2011-11-30 20:34:45 +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
Anton Khirnov dfc2c4d900 lavf: use designated initialisers for all (de)muxers. 
It's more readable and less prone to breakage.
 2011-07-17 06:58:37 +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 a2704c9712 avio: add avio_tell macro as a replacement for url_ftell 
Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>
 2011-03-04 11:26:57 -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 6b4aa5dac8 avio: avio_ prefix for url_fseek 
Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>
 2011-03-01 12:12:33 -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
Michael Niedermayer a20df85886 Fix doxy that refers to the wrong variable. 
Originally committed as revision 24549 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2010-07-27 15:54:26 +00:00
Diego Biurrun ba87f0801d Remove explicit filename from Doxygen @file commands. 
Passing an explicit filename to this command is only necessary if the
documentation in the @file block refers to a file different from the
one the block resides in.

Originally committed as revision 22921 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2010-04-20 14:45:34 +00:00
Jean-Daniel Dupas cc947f04cc Replace all occurences of PKT_FLAG_KEY with AV_PKT_FLAG_KEY. 
Patch by Jean-Daniel Dupas, devlists shadowlab org

Originally committed as revision 22744 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2010-03-31 12:29:58 +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
Peter Ross cbd3441eec Make DeluxePaint Animation demuxer actually return the find_record() error code (issue 1739). 
Originally committed as revision 21769 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2010-02-12 11:31:35 +00:00
Peter Ross e6565055b9 Deluxe Paint Animation demuxer 
Originally committed as revision 21118 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2010-01-10 05:47:50 +00:00