[FFmpeg-devel] [PATCH] Redesign the video size and rate abbreviations system

[Stefano Sabatini]

Hi to all FFmpeg developers.

This patch tries to fix some problems with the video size and rate
abbreviations system of FFmpeg, some of which have been discussed in
the "List supported video size and rate abbreviations" thread.

Suggested changelog message:
"Redesigns the video size and rate abbreviations system" 

The patch does as follows:

* moves the size and rate abbreviations system code (AbvEntry struct
  definition, frame_abvs array, parse_image_size and parse_frame_rate
  functions) from libavformat/utils.c to libavcodec/utils.c.

* splits the frame_abvs array into two different video size and rate
  abbreviations arrays (defined by two distinct struct) in this way:

  * AbvEntry -> AVVideoSizeAbbr
             -> AVVideoRateAbbr
  * frame_abvs -> avcodec_video_rate_abbrs
               -> avcodec_video_size_abbrs
  
  AVVideo{Size,Rate}Abbr are defined in libavcodec/avcodec.h, 
  avcodec_video_{size,rate}_abbrs are defined in libavcodec/utils.c
  and exported in libavcodec/avcodec.h.

* changes the names of the functions parse_image_size and
  parse_frame_rate in this way:

  * parse_image_size -> avcodec_parse_video_size
  * parse_frame_rate -> avcodec_parse_video_rate
  
  Every parse_image_size and parse_frame_rate invocation present in
  the code (namely in ffmpeg.c, ffplay.c and ffserver.c) is changed
  accordingly.

* updates the documentation.

Cheers
-- 
Stefano Sabatini
Linux user number 337176 (see http://counter.li.org)
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