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Andreas Rheinhardt d0b0fc7cb9 avcodec/magicyuv: Avoid copying values around pointlessly 
When parsing Huffman tables, an array of HuffEntries (a struct
containing a code's bitlength, its bits and its symbol) is used as
intermediate tables in order to sort the entries (the order depends on
both the length of the entries as well as on their symbols). After sorting
them, the symbol and len components are copied into other arrays (the
HuffEntries' code has never been set or used, despite using quite a lot
of stack space) and the codes are generated. Afterwards, the VLC is
created.

Yet ff_init_vlc_sparse() can handle non-continuous arrays as input;
there is no need to copy the entries at all. This commit implements
this.

Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
2020-09-01 11:05:38 +02:00
compat
doc doc/decoders: Document default value of ac3's drc_scale option 2020-08-31 23:43:06 +02:00
ffbuild
fftools
libavcodec avcodec/magicyuv: Avoid copying values around pointlessly 2020-09-01 11:05:38 +02:00
libavdevice avdevice/lavfi: Don't set pkt->size to the value it already has 2020-09-01 09:50:05 +02:00
libavfilter avfilter/f_graphmonitor: also show link EOF status in blue 2020-08-31 19:59:35 +02:00
libavformat avformat/wavdec: allow to change max size of single demuxed packet 2020-09-01 10:35:03 +02:00
libavresample
libavutil hwcontext_vaapi: Don't require a render node when deriving from DRM 2020-08-31 21:42:14 +01:00
libpostproc
libswresample
libswscale
presets
tests libavcodec/jpeg2000: fix tag tree reset 2020-08-30 16:18:37 +02:00
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README.md

FFmpeg README

FFmpeg is a collection of libraries and tools to process multimedia content such as audio, video, subtitles and related metadata.

Libraries

  • libavcodec provides implementation of a wider range of codecs.
  • libavformat implements streaming protocols, container formats and basic I/O access.
  • libavutil includes hashers, decompressors and miscellaneous utility functions.
  • libavfilter provides a mean to alter decoded Audio and Video through chain of filters.
  • libavdevice provides an abstraction to access capture and playback devices.
  • libswresample implements audio mixing and resampling routines.
  • libswscale implements color conversion and scaling routines.

Tools

  • ffmpeg is a command line toolbox to manipulate, convert and stream multimedia content.
  • ffplay is a minimalistic multimedia player.
  • ffprobe is a simple analysis tool to inspect multimedia content.
  • Additional small tools such as aviocat, ismindex and qt-faststart.

Documentation

The offline documentation is available in the doc/ directory.

The online documentation is available in the main website and in the wiki.

Examples

Coding examples are available in the doc/examples directory.

License

FFmpeg codebase is mainly LGPL-licensed with optional components licensed under GPL. Please refer to the LICENSE file for detailed information.

Contributing

Patches should be submitted to the ffmpeg-devel mailing list using git format-patch or git send-email. Github pull requests should be avoided because they are not part of our review process and will be ignored.