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Ramiro Polla 7e4784e40c avcodec/mpegvideoencdsp: speed up draw_edges_8_c by inlining it for all used edge widths 
This commit also restricts w to 4, 8, or 16.

Intel(R) Core(TM) i5-5300U CPU @ 2.30GHz:
                                    before    after
draw_edges_8_1724_4_c:             46796.5   7141.7  ( 6.55x)
draw_edges_8_1724_8_c:             43584.5   7216.5  ( 6.04x)
draw_edges_8_1724_16_c:            47007.2  10080.5  ( 4.66x)
draw_edges_128_407_4_c:            11199.0   4185.0  ( 2.68x)
draw_edges_128_407_8_c:            10660.2   4418.0  ( 2.41x)
draw_edges_128_407_16_c:           11800.2   4634.5  ( 2.55x)
draw_edges_1080_31_4_c:             1356.5    634.7  ( 2.14x)
draw_edges_1080_31_8_c:             1972.0   1430.2  ( 1.38x)
draw_edges_1080_31_16_c:            4621.0   4009.7  ( 1.15x)
draw_edges_1920_4_4_c:               834.5    795.2  ( 1.05x)
draw_edges_1920_4_4_negstride_c:     821.7    802.0  ( 1.02x)
draw_edges_1920_4_8_c:              2782.2   2650.7  ( 1.05x)
draw_edges_1920_4_8_negstride_c:    2724.7   2670.0  ( 1.02x)
draw_edges_1920_4_16_c:             6437.5   6327.7  ( 1.02x)
draw_edges_1920_4_16_negstride_c:   6395.2   6349.5  ( 1.01x)

A55:
                                    before    after
draw_edges_8_1724_4_c:             52540.4  19739.2  ( 2.66x)
draw_edges_8_1724_8_c:             45386.9  19847.4  ( 2.29x)
draw_edges_8_1724_16_c:            51995.4  23284.7  ( 2.23x)
draw_edges_128_407_4_c:            13401.1   6988.2  ( 1.92x)
draw_edges_128_407_8_c:            12218.4   7527.9  ( 1.62x)
draw_edges_128_407_16_c:           13695.9   8207.2  ( 1.67x)
draw_edges_1080_31_4_c:             3702.9   3110.4  ( 1.19x)
draw_edges_1080_31_8_c:             6015.6   5643.2  ( 1.07x)
draw_edges_1080_31_16_c:           12281.9  11901.4  ( 1.03x)
draw_edges_1920_4_4_c:              3957.9   3970.2  ( 1.00x)
draw_edges_1920_4_4_negstride_c:    3964.1   3825.2  ( 1.04x)
draw_edges_1920_4_8_c:              7757.9   7676.4  ( 1.01x)
draw_edges_1920_4_8_negstride_c:    7923.6   7812.4  ( 1.01x)
draw_edges_1920_4_16_c:            14791.6  15143.9  ( 0.98x)
draw_edges_1920_4_16_negstride_c:  14788.6  15163.4  ( 0.98x)

A76:
                                    before   after
draw_edges_8_1724_4_c:             39786.0  4968.5  ( 8.01x)
draw_edges_8_1724_8_c:             32971.5  5069.5  ( 6.50x)
draw_edges_8_1724_16_c:            40056.0  6017.2  ( 6.66x)
draw_edges_128_407_4_c:             9517.2  1210.5  ( 7.86x)
draw_edges_128_407_8_c:             8035.7  1346.2  ( 5.97x)
draw_edges_128_407_16_c:            9946.5  1648.2  ( 6.03x)
draw_edges_1080_31_4_c:             1308.0   660.7  ( 1.98x)
draw_edges_1080_31_8_c:             1785.5  1270.7  ( 1.41x)
draw_edges_1080_31_16_c:            3266.7  2591.5  ( 1.26x)
draw_edges_1920_4_4_c:              1151.0  1090.7  ( 1.06x)
draw_edges_1920_4_4_negstride_c:    1153.7  1096.5  ( 1.05x)
draw_edges_1920_4_8_c:              2220.7  2186.5  ( 1.02x)
draw_edges_1920_4_8_negstride_c:    2218.5  2193.5  ( 1.01x)
draw_edges_1920_4_16_c:             4324.2  4230.0  ( 1.02x)
draw_edges_1920_4_16_negstride_c:   4310.7  4233.0  ( 1.02x)
2024-08-26 12:50:26 +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/mpegvideoencdsp: speed up draw_edges_8_c by inlining it for all used edge widths 2024-08-26 12:50:26 +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
CREDITS
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.