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Ramiro Polla 3bfce2a104 avcodec/x86/mpegvideoencdsp: speed up draw_edges_mmx by using memcpy() 
The mmx memory copy code is not nearly as efficient as memcpy(), which
would make draw_edges_mmx much slower than draw_edges_8_c.

Intel(R) Core(TM) i5-5300U CPU @ 2.30GHz:
                                      before    after
draw_edges_8_1724_4_mmx:              8700.5   8751.8  ( 0.99x)
draw_edges_8_1724_8_mmx:             10441.7  10558.0  ( 0.99x)
draw_edges_8_1724_16_mmx:            10660.7  10799.5  ( 0.99x)
draw_edges_128_407_4_mmx:             4202.2   4099.3  ( 1.03x)
draw_edges_128_407_8_mmx:             4579.0   4511.3  ( 1.02x)
draw_edges_128_407_16_mmx:            5479.7   4729.5  ( 1.16x)
draw_edges_1080_31_4_mmx:             1546.7    658.0  ( 2.35x)
draw_edges_1080_31_8_mmx:             2745.5   1442.5  ( 1.90x)
draw_edges_1080_31_16_mmx:           12511.5   4901.0  ( 2.55x)
draw_edges_1920_4_4_mmx:              2659.0    705.0  ( 3.77x)
draw_edges_1920_4_4_negstride_mmx:    2643.0    729.0  ( 3.63x)
draw_edges_1920_4_8_mmx:              7845.0   2819.0  ( 2.78x)
draw_edges_1920_4_8_negstride_mmx:    7777.0   2747.3  ( 2.83x)
draw_edges_1920_4_16_mmx:            24583.7   6358.3  ( 3.87x)
draw_edges_1920_4_16_negstride_mmx:  24589.0   6367.0  ( 3.86x)
2024-08-26 12:50:21 +02:00
compat avutil/common: Don't auto-include mem.h 2024-03-31 00:08:43 +01:00
doc avcodec/avcodec: Warn about data returned from get_buffer*() 2024-08-18 23:04:28 +02:00
ffbuild riscv: add Zvbb vector bit manipulation extension 2024-05-11 11:38:49 +03:00
fftools fftools/ffplay: handle flip in display matrix 2024-08-24 00:26:59 +08:00
libavcodec avcodec/x86/mpegvideoencdsp: speed up draw_edges_mmx by using memcpy() 2024-08-26 12:50:21 +02:00
libavdevice libavdevice/gdigrab: change hwnd tail check fail logic to !=null 2024-08-15 20:10:33 +08:00
libavfilter avfilter/unsharp: Merge header into .c 2024-08-26 16:58:25 +08:00
libavformat avformat/vapoursynth: load library at runtime 2024-08-26 10:30:52 +02:00
libavutil avutil/aarch64: add AV_COPY128 and AV_ZERO128 macros 2024-08-26 10:26:59 +02:00
libpostproc avutil/common: Don't auto-include mem.h 2024-03-31 00:08:43 +01:00
libswresample swresample/swresample: Rectify invalid function in the documentation 2024-07-02 21:57:17 +02:00
libswscale swscale/aarch64: cosmetics fix (spaces inside curly braces) 2024-08-26 11:07:49 +02:00
presets
tests checkasm/mpegvideoencdsp: add pix_sum, pix_norm1, and draw_edges 2024-08-26 12:48:09 +02:00
tools tools/target_dec_fuzzer: Check that FFv1 doesnt leave uninitialized memory in its buffers 2024-08-14 18:20:57 +02:00
.gitattributes
.gitignore
.mailmap mailmap: add entry for myself 2024-07-15 01:59:37 +02:00
Changelog lavc/qsvdec: Add VVC decoder 2024-07-30 13:40:21 +08:00
configure avformat/vapoursynth: load library at runtime 2024-08-26 10:30:52 +02:00
CONTRIBUTING.md
COPYING.GPLv2
COPYING.GPLv3
COPYING.LGPLv2.1
COPYING.LGPLv3
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INSTALL.md
LICENSE.md
MAINTAINERS MAINTAINERS: add CC preference for myself 2024-08-19 17:46:44 +02:00
Makefile add tools/target_swr_fuzzer 2024-08-08 15:26:52 +02:00
README.md
RELEASE RELEASE: update after 7.0 branch 2024-04-02 13:02:39 -03:00

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.