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Andreas Rheinhardt 2b46ae6407 avcodec/codec_internal: Remove FF_CODEC_CAP_ALLOCATE_PROGRESS 
Before commit f025b8e110,
every frame-threaded decoder used ThreadFrames, even when
they did not have any inter-frame dependencies at all.
In order to distinguish those decoders that need the AVBuffer
for progress communication from those that do not (to avoid
the allocation for the latter), the former decoders were marked
with the FF_CODEC_CAP_ALLOCATE_PROGRESS internal codec cap.

Yet distinguishing these two can be done in a more natural way:
Don't use ThreadFrames when not needed and split ff_thread_get_buffer()
into a core function that calls the user's get_buffer2 callback
and a wrapper around it that also allocates the progress AVBuffer.
This has been done in 02220b88fc
and since that commit the ALLOCATE_PROGRESS cap was nearly redundant.

The only exception was WebP and VP8. WebP can contain VP8
and uses the VP8 decoder directly (i.e. they share the same
AVCodecContext). Both decoders are frame-threaded and VP8
has inter-frame dependencies (in general, not in valid WebP)
and therefore the ALLOCATE_PROGRESS cap. In order to avoid
allocating progress in case of a frame-threaded WebP decoder
the cap and the check for the cap has been kept in place.

Yet now the VP8 decoder has been switched to use ProgressFrames
and therefore there is just no reason any more for this check
and the cap. This commit therefore removes both.

Also change the value of FF_CODEC_CAP_USES_PROGRESSFRAMES
to leave no gaps.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
 		2024-04-19 13:18:04 +02:00
compat
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doc avcodec/codec_internal: Remove FF_CODEC_CAP_ALLOCATE_PROGRESS 2024-04-19 13:18:04 +02:00
ffbuild
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fftools
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libavcodec avcodec/codec_internal: Remove FF_CODEC_CAP_ALLOCATE_PROGRESS 2024-04-19 13:18:04 +02:00
libavdevice
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libavfilter lavfi/tonemap_vaapi: Add support for HDR to HDR tone mapping 2024-04-18 14:43:07 +08:00
libavformat lavf/matroskaenc: apply consistent style to options descriptions 2024-04-19 08:44:20 +02:00
libavutil avutil/frame: remove comment about avcodec_get_frame_class() 2024-04-18 12:24:43 -03:00
libpostproc
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libswresample
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libswscale swscale: [LA] Optimize swscale funcs in input.c 2024-04-11 23:53:59 +02:00
presets
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tests avutil/frame: add a flag to allow overwritting existing entries 2024-04-11 09:18:19 -03:00
tools
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.gitattributes
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.gitignore
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.mailmap
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.travis.yml
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CONTRIBUTING.md
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COPYING.GPLv2
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COPYING.GPLv3
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COPYING.LGPLv2.1
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COPYING.LGPLv3
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CREDITS
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Changelog Changelog: Add pad_vaapi, drawbox_vaapi entry 2024-04-18 14:43:07 +08:00
INSTALL.md
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LICENSE.md
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MAINTAINERS
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Makefile
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README.md
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RELEASE
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configure lavfi: Add drawbox_vaapi filter 2024-04-18 14:43:07 +08:00

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 means to alter decoded audio and video through a directed graph of connected 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.