1. 04 Mar, 2016 1 commit
  2. 23 Feb, 2016 1 commit
    • Anton Khirnov's avatar
      lavf: replace AVStream.codec with AVStream.codecpar · 9200514a
      Anton Khirnov authored
      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.
      9200514a
  3. 22 Feb, 2016 1 commit
  4. 24 Jan, 2016 1 commit
    • Anton Khirnov's avatar
      lavf: allow custom IO for all files · 9f61abc8
      Anton Khirnov authored
      Some (de)muxers open additional files beyond the main IO context.
      Currently, they call avio_open() directly, which prevents the caller
      from using custom IO for such streams.
      
      This commit adds callbacks to AVFormatContext that default to
      avio_open2()/avio_close(), but can be overridden by the caller. All
      muxers and demuxers using AVIO are switched to using those callbacks
      instead of calling avio_open()/avio_close() directly.
      
      (de)muxers that use the URLProtocol layer directly instead of AVIO
      remain unconverted for now. This should be fixed in later commits.
      9f61abc8
  5. 18 Nov, 2015 1 commit
  6. 09 Nov, 2015 1 commit
    • Anton Khirnov's avatar
      lavf: deprecate compute_pkt_fields2 · 8de1ee9f
      Anton Khirnov authored
      All encoders set pts and dts properly now (and have been doing that for
      a while), so there is no good reason to do any timestamp guessing in the
      muxer.
      
      The newly added AVStreamInternal will be later used for storing all the
      private fields currently living in AVStream.
      8de1ee9f
  7. 08 Nov, 2015 2 commits
  8. 26 Oct, 2015 3 commits
  9. 29 Sep, 2015 1 commit
  10. 28 Aug, 2015 1 commit
  11. 27 Jul, 2015 2 commits
  12. 20 Apr, 2015 1 commit
  13. 19 Apr, 2015 1 commit
  14. 07 Apr, 2015 1 commit
  15. 10 Feb, 2015 1 commit
  16. 27 Jan, 2015 1 commit
  17. 04 Jan, 2015 1 commit
  18. 17 Oct, 2014 1 commit
  19. 15 Oct, 2014 1 commit
  20. 11 Oct, 2014 1 commit
  21. 29 Sep, 2014 1 commit
  22. 25 Aug, 2014 1 commit
  23. 13 Aug, 2014 2 commits
    • Anton Khirnov's avatar
      lavf: eliminate ff_get_audio_frame_size() · 30e50c50
      Anton Khirnov authored
      It is basically a wrapper around av_get_audio_frame_duration(), with a
      fallback to AVCodecContext.frame_size. However, that field is set only
      when the stream codec context is actually used for encoding or decoding,
      which is discouraged.
      
      For muxing, it is generally the responsibility of the caller to set the
      packet duration.
      For demuxing, if the duration is not stored at the container level, it
      should be set by the parser.
      
      Therefore, removing the frame_size fallback should not break any
      important case.
      30e50c50
    • Andrew Stone's avatar
      Set protocol-level metadata in AVFormatContext any time a packet is read. · 019d3fcc
      Andrew Stone authored
      If any option named "metadata" is set inside the context, it is pulled up to
      the context and then the option is cleared.
      Signed-off-by: 's avatarAnton Khirnov <anton@khirnov.net>
      019d3fcc
  24. 29 Jul, 2014 1 commit
  25. 26 Jul, 2014 1 commit
  26. 08 Jul, 2014 1 commit
  27. 22 Jun, 2014 1 commit
  28. 18 Jun, 2014 1 commit
    • Anton Khirnov's avatar
      lavf: switch to AVStream.time_base as the hint for the muxer timebase · 194be1f4
      Anton Khirnov authored
      Previously, AVStream.codec.time_base was used for that purpose, which
      was quite confusing for the callers. This change also opens the path for
      removing AVStream.codec.
      
      The change in the lavf-mkv test is due to the native timebase (1/1000)
      being used instead of the default one (1/90000), so the packets are now
      sent to the crc muxer in the same order in which they are demuxed
      (previously some of them got reordered because of inexact timestamp
      conversion).
      194be1f4
  29. 14 Jun, 2014 1 commit
  30. 19 May, 2014 1 commit
  31. 03 May, 2014 1 commit
  32. 28 Apr, 2014 1 commit
  33. 22 Apr, 2014 1 commit
  34. 24 Mar, 2014 1 commit
  35. 11 Mar, 2014 1 commit