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Andreas Rheinhardt 5b33f523d7 avformat/aaxdec: Fix potential integer overflow 
The AAX demuxer reads a 32bit number containing the amount of entries
of an array and stores it in an uint32_t. Yet when iterating over this
array, a loop counter of type int is used. This leads to undefined
behaviour if the amount of entries is not in the range of int; to avoid
this, it is generally good to use the same type for the loop counter as
for the variable it is compared to. This is done in one of the two loops
affected by this.

In the other loop, the undefined behaviour can begin even earlier: Here
the loop counter is multiplied by an uint16_t which can overflow as soon
as the loop counter is > 2^15. Using an unsigned type would avoid the
undefined behaviour, but truncation would still be possible, so use an
uint64_t.

Also use an uint32_t for a variable containing an index in said array.

This fixes Coverity issue #1466767.

Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
2020-09-20 20:06:55 +02:00
compat
doc
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fftools
libavcodec avcodec/ansi: Check nb_args for overflow 2020-09-20 18:03:52 +02:00
libavdevice
libavfilter dnn_backend_native_layer_conv2d.c: fix bug of loop boundary in single thread mode. 2020-09-20 12:30:47 +08:00
libavformat avformat/aaxdec: Fix potential integer overflow 2020-09-20 20:06:55 +02:00
libavresample
libavutil avutil/fixed_dsp: Fix integer overflows in butterflies_fixed_c() 2020-09-19 00:37:45 +02:00
libpostproc
libswresample
libswscale
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tests
tools tools/target_dec_fuzzer: Adjust VQA threshold 2020-09-19 00:40:56 +02:00
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Changelog avformat: add CRI AAX demuxer 2020-09-18 11:34:11 +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.