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31 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
Luca Barbato ce70f28a17 avpacket: Replace av_free_packet with av_packet_unref 
`av_packet_unref` matches the AVFrame ref-counted API and can be used as
a drop in replacement.

Deprecate `av_free_packet`.
 2015-10-26 18:00:55 +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
wm4 9deaec7828 lavf: move internal fields from public to internal context 
This is not an API change; the fields were explicitly declared private
before.

Signed-off-by: Anton Khirnov <anton@khirnov.net>
 2015-02-10 21:45:04 +01:00
Martin Storsjö 68ff998128 vqf: Make sure the bitrate is in the valid range 
Even if the sample rate is valid, an invalid bitrate could
pass the mode combination test below.

CC: libav-stable@libav.org
Signed-off-by: Martin Storsjö <martin@martin.st>
 2013-09-29 18:46:39 +03:00
Martin Storsjö 9277050e29 vqf: Make sure sample_rate is set to a valid value 
This avoids divisions by zero later (and possibly assertions in
time base scaling), since an invalid rate_flag combined with an
invalid bitrate below could pass the mode combination test.

Reported-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC: libav-stable@libav.org
Signed-off-by: Martin Storsjö <martin@martin.st>
 2013-09-29 18:46:21 +03:00
Diego Biurrun e0f8be6413 avformat: Add AVPROBE_SCORE_EXTENSION define and use where appropriate 2013-05-04 21:43:06 +02:00
Anton Khirnov 36ef5369ee Replace all CODEC_ID_* with AV_CODEC_ID_* 2012-08-07 16:00:24 +02:00
Justin Ruggles d0ab585074 vqf: set packet duration 
Fixes timestamp calculation.
The FATE reference is updated because timestamp calculations are now more
accurate. Previous timestamps were based on average bit rate.
 2012-03-03 17:03:26 -05:00
Justin Ruggles 4bf6775e9d vqf: set packet parameters after av_new_packet() 
Otherwise the values are overwritten.
 2012-02-29 15:45:50 -05:00
Anton Khirnov 6e9651d106 lavf: remove AVFormatParameters from AVFormatContext.read_header signature 2012-01-27 10:51:57 +01:00
Paul B Mahol 49a2aebc00 vqf: recognize more metadata chunks 
Do not create tags for non-char chunks.
Create readable tag for DSIZ chunk.

Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>
 2012-01-07 11:14:57 -08:00
Paul B Mahol f86209b43d vqf: add more known extensions 
Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>
 2012-01-06 09:24:40 -08:00
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
Justin Ruggles 7b966566da vqf/twinvq: pass vqf COMM chunk info in extradata 
This is needed because the twinvq decoder cannot rely on bit_rate to be set.
The API documentation says that bit_rate is set by libavcodec, not by the
user.
 2011-11-11 14:06:14 -05:00
Justin Ruggles ca482ce420 vqf: do not set bits_per_coded_sample for TwinVQ. 
It is a lossy codec with varying quantization, so bits_per_coded_sample is
not applicable.
 2011-11-11 14:06:14 -05:00
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 0ebcdf5cda Do not include mathematics.h in avutil.h 
Signed-off-by: Mans Rullgard <mans@mansr.com>
 2011-07-03 21:42:06 +01:00
Anton Khirnov d2d67e424f Remove all uses of now deprecated metadata functions. 2011-06-08 07:43:45 +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 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
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
Vitor Sessak efd8b009ff Use a suitable timebase in VQF demuxer 
Originally committed as revision 22868 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2010-04-13 01:19:59 +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
Michael Niedermayer 12ad66712a Use AV_METADATA_DONT_STRDUP* / use av_malloced metadata instead of strduped 
arrays of fixed length.
Code from ffmbc with changes to adapt to our metadata API.

Originally committed as revision 20836 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2009-12-13 20:27:29 +00:00
Vitor Sessak 616e899c43 VQF demuxer 
Originally committed as revision 17866 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2009-03-07 22:42:09 +00:00