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Krzysztof Pyrkosz e25a19fc7c swscale/aarch64/output.S: refactor ff_yuv2plane1_8_neon The benchmarks (before vs after) were gathered using ./tests/checkasm/checkasm --test=sw_scale --bench --runs=6 \| grep yuv2yuv1 A78 before: yuv2yuv1_0_512_accurate_c: 2039.5 ( 1.00x) yuv2yuv1_0_512_accurate_neon: 385.5 ( 5.29x) yuv2yuv1_0_512_approximate_c: 2110.5 ( 1.00x) yuv2yuv1_0_512_approximate_neon: 385.5 ( 5.47x) yuv2yuv1_3_512_accurate_c: 2061.2 ( 1.00x) yuv2yuv1_3_512_accurate_neon: 381.2 ( 5.41x) yuv2yuv1_3_512_approximate_c: 2099.2 ( 1.00x) yuv2yuv1_3_512_approximate_neon: 381.2 ( 5.51x) yuv2yuv1_8_512_accurate_c: 2054.2 ( 1.00x) yuv2yuv1_8_512_accurate_neon: 385.5 ( 5.33x) yuv2yuv1_8_512_approximate_c: 2112.2 ( 1.00x) yuv2yuv1_8_512_approximate_neon: 385.5 ( 5.48x) yuv2yuv1_11_512_accurate_c: 2036.0 ( 1.00x) yuv2yuv1_11_512_accurate_neon: 381.2 ( 5.34x) yuv2yuv1_11_512_approximate_c: 2115.0 ( 1.00x) yuv2yuv1_11_512_approximate_neon: 381.2 ( 5.55x) yuv2yuv1_16_512_accurate_c: 2066.5 ( 1.00x) yuv2yuv1_16_512_accurate_neon: 385.5 ( 5.36x) yuv2yuv1_16_512_approximate_c: 2100.8 ( 1.00x) yuv2yuv1_16_512_approximate_neon: 385.5 ( 5.45x) yuv2yuv1_19_512_accurate_c: 2059.8 ( 1.00x) yuv2yuv1_19_512_accurate_neon: 381.2 ( 5.40x) yuv2yuv1_19_512_approximate_c: 2102.8 ( 1.00x) yuv2yuv1_19_512_approximate_neon: 381.2 ( 5.52x) After: yuv2yuv1_0_512_accurate_c: 2206.0 ( 1.00x) yuv2yuv1_0_512_accurate_neon: 139.2 (15.84x) yuv2yuv1_0_512_approximate_c: 2050.0 ( 1.00x) yuv2yuv1_0_512_approximate_neon: 139.2 (14.72x) yuv2yuv1_3_512_accurate_c: 2205.2 ( 1.00x) yuv2yuv1_3_512_accurate_neon: 138.0 (15.98x) yuv2yuv1_3_512_approximate_c: 2052.5 ( 1.00x) yuv2yuv1_3_512_approximate_neon: 138.0 (14.87x) yuv2yuv1_8_512_accurate_c: 2171.0 ( 1.00x) yuv2yuv1_8_512_accurate_neon: 139.2 (15.59x) yuv2yuv1_8_512_approximate_c: 2064.2 ( 1.00x) yuv2yuv1_8_512_approximate_neon: 139.2 (14.82x) yuv2yuv1_11_512_accurate_c: 2164.8 ( 1.00x) yuv2yuv1_11_512_accurate_neon: 138.0 (15.69x) yuv2yuv1_11_512_approximate_c: 2048.8 ( 1.00x) yuv2yuv1_11_512_approximate_neon: 138.0 (14.85x) yuv2yuv1_16_512_accurate_c: 2154.5 ( 1.00x) yuv2yuv1_16_512_accurate_neon: 139.2 (15.47x) yuv2yuv1_16_512_approximate_c: 2047.2 ( 1.00x) yuv2yuv1_16_512_approximate_neon: 139.2 (14.70x) yuv2yuv1_19_512_accurate_c: 2144.5 ( 1.00x) yuv2yuv1_19_512_accurate_neon: 138.0 (15.54x) yuv2yuv1_19_512_approximate_c: 2046.0 ( 1.00x) yuv2yuv1_19_512_approximate_neon: 138.0 (14.83x) A72 before: yuv2yuv1_0_512_accurate_c: 3779.8 ( 1.00x) yuv2yuv1_0_512_accurate_neon: 527.8 ( 7.16x) yuv2yuv1_0_512_approximate_c: 4128.2 ( 1.00x) yuv2yuv1_0_512_approximate_neon: 528.2 ( 7.81x) yuv2yuv1_3_512_accurate_c: 3836.2 ( 1.00x) yuv2yuv1_3_512_accurate_neon: 527.0 ( 7.28x) yuv2yuv1_3_512_approximate_c: 3991.0 ( 1.00x) yuv2yuv1_3_512_approximate_neon: 526.8 ( 7.58x) yuv2yuv1_8_512_accurate_c: 3732.8 ( 1.00x) yuv2yuv1_8_512_accurate_neon: 525.5 ( 7.10x) yuv2yuv1_8_512_approximate_c: 4060.0 ( 1.00x) yuv2yuv1_8_512_approximate_neon: 527.0 ( 7.70x) yuv2yuv1_11_512_accurate_c: 3836.2 ( 1.00x) yuv2yuv1_11_512_accurate_neon: 530.0 ( 7.24x) yuv2yuv1_11_512_approximate_c: 4014.0 ( 1.00x) yuv2yuv1_11_512_approximate_neon: 530.0 ( 7.57x) yuv2yuv1_16_512_accurate_c: 3726.2 ( 1.00x) yuv2yuv1_16_512_accurate_neon: 525.5 ( 7.09x) yuv2yuv1_16_512_approximate_c: 4114.2 ( 1.00x) yuv2yuv1_16_512_approximate_neon: 526.2 ( 7.82x) yuv2yuv1_19_512_accurate_c: 3812.2 ( 1.00x) yuv2yuv1_19_512_accurate_neon: 530.0 ( 7.19x) yuv2yuv1_19_512_approximate_c: 4012.2 ( 1.00x) yuv2yuv1_19_512_approximate_neon: 530.0 ( 7.57x) After: yuv2yuv1_0_512_accurate_c: 3716.8 ( 1.00x) yuv2yuv1_0_512_accurate_neon: 215.1 (17.28x) yuv2yuv1_0_512_approximate_c: 3877.8 ( 1.00x) yuv2yuv1_0_512_approximate_neon: 222.8 (17.40x) yuv2yuv1_3_512_accurate_c: 3717.1 ( 1.00x) yuv2yuv1_3_512_accurate_neon: 217.8 (17.06x) yuv2yuv1_3_512_approximate_c: 3801.6 ( 1.00x) yuv2yuv1_3_512_approximate_neon: 220.3 (17.25x) yuv2yuv1_8_512_accurate_c: 3716.6 ( 1.00x) yuv2yuv1_8_512_accurate_neon: 213.8 (17.38x) yuv2yuv1_8_512_approximate_c: 3831.8 ( 1.00x) yuv2yuv1_8_512_approximate_neon: 218.1 (17.57x) yuv2yuv1_11_512_accurate_c: 3717.1 ( 1.00x) yuv2yuv1_11_512_accurate_neon: 219.1 (16.97x) yuv2yuv1_11_512_approximate_c: 3801.6 ( 1.00x) yuv2yuv1_11_512_approximate_neon: 216.1 (17.59x) yuv2yuv1_16_512_accurate_c: 3716.6 ( 1.00x) yuv2yuv1_16_512_accurate_neon: 213.6 (17.40x) yuv2yuv1_16_512_approximate_c: 3831.6 ( 1.00x) yuv2yuv1_16_512_approximate_neon: 215.1 (17.82x) yuv2yuv1_19_512_accurate_c: 3717.1 ( 1.00x) yuv2yuv1_19_512_accurate_neon: 223.8 (16.61x) yuv2yuv1_19_512_approximate_c: 3801.6 ( 1.00x) yuv2yuv1_19_512_approximate_neon: 219.1 (17.35x) x13s before: yuv2yuv1_0_512_accurate_c: 1435.1 ( 1.00x) yuv2yuv1_0_512_accurate_neon: 221.1 ( 6.49x) yuv2yuv1_0_512_approximate_c: 1405.4 ( 1.00x) yuv2yuv1_0_512_approximate_neon: 219.1 ( 6.41x) yuv2yuv1_3_512_accurate_c: 1418.6 ( 1.00x) yuv2yuv1_3_512_accurate_neon: 215.9 ( 6.57x) yuv2yuv1_3_512_approximate_c: 1405.9 ( 1.00x) yuv2yuv1_3_512_approximate_neon: 224.1 ( 6.27x) yuv2yuv1_8_512_accurate_c: 1433.9 ( 1.00x) yuv2yuv1_8_512_accurate_neon: 218.6 ( 6.56x) yuv2yuv1_8_512_approximate_c: 1412.9 ( 1.00x) yuv2yuv1_8_512_approximate_neon: 218.9 ( 6.46x) yuv2yuv1_11_512_accurate_c: 1449.1 ( 1.00x) yuv2yuv1_11_512_accurate_neon: 217.6 ( 6.66x) yuv2yuv1_11_512_approximate_c: 1410.9 ( 1.00x) yuv2yuv1_11_512_approximate_neon: 221.1 ( 6.38x) yuv2yuv1_16_512_accurate_c: 1402.1 ( 1.00x) yuv2yuv1_16_512_accurate_neon: 214.6 ( 6.53x) yuv2yuv1_16_512_approximate_c: 1422.4 ( 1.00x) yuv2yuv1_16_512_approximate_neon: 222.9 ( 6.38x) yuv2yuv1_19_512_accurate_c: 1421.6 ( 1.00x) yuv2yuv1_19_512_accurate_neon: 217.4 ( 6.54x) yuv2yuv1_19_512_approximate_c: 1421.6 ( 1.00x) yuv2yuv1_19_512_approximate_neon: 221.4 ( 6.42x) After: yuv2yuv1_0_512_accurate_c: 1413.6 ( 1.00x) yuv2yuv1_0_512_accurate_neon: 80.6 (17.53x) yuv2yuv1_0_512_approximate_c: 1455.6 ( 1.00x) yuv2yuv1_0_512_approximate_neon: 80.6 (18.05x) yuv2yuv1_3_512_accurate_c: 1429.1 ( 1.00x) yuv2yuv1_3_512_accurate_neon: 77.4 (18.47x) yuv2yuv1_3_512_approximate_c: 1462.6 ( 1.00x) yuv2yuv1_3_512_approximate_neon: 80.6 (18.14x) yuv2yuv1_8_512_accurate_c: 1425.4 ( 1.00x) yuv2yuv1_8_512_accurate_neon: 77.9 (18.30x) yuv2yuv1_8_512_approximate_c: 1436.6 ( 1.00x) yuv2yuv1_8_512_approximate_neon: 80.9 (17.76x) yuv2yuv1_11_512_accurate_c: 1429.4 ( 1.00x) yuv2yuv1_11_512_accurate_neon: 76.1 (18.78x) yuv2yuv1_11_512_approximate_c: 1447.1 ( 1.00x) yuv2yuv1_11_512_approximate_neon: 78.4 (18.46x) yuv2yuv1_16_512_accurate_c: 1439.9 ( 1.00x) yuv2yuv1_16_512_accurate_neon: 77.6 (18.55x) yuv2yuv1_16_512_approximate_c: 1422.1 ( 1.00x) yuv2yuv1_16_512_approximate_neon: 78.1 (18.20x) yuv2yuv1_19_512_accurate_c: 1447.1 ( 1.00x) yuv2yuv1_19_512_accurate_neon: 78.1 (18.52x) yuv2yuv1_19_512_approximate_c: 1474.4 ( 1.00x) yuv2yuv1_19_512_approximate_neon: 78.1 (18.87x) Signed-off-by: Martin Storsjö <martin@martin.st>		2025-02-07 12:05:06 +02:00
compat	compat/w32pthreads: change pthread_t into pointer to malloced struct	2024-12-16 09:43:19 +01:00
doc	doc/t2h: Support texinfo 7.1 and 7.2 pretest	2025-02-06 18:00:34 -03:00
ffbuild	ffbuild/bin2c: misc fix	2025-01-13 23:58:36 +08:00
fftools	fftools/ffmpeg_opt: Remove audio_drift_threshold	2025-02-02 17:03:32 +01:00
libavcodec	avcodec/ffv1enc_vulkan: add missing arguent to ff_ffv1_common_init()	2025-02-06 17:03:25 -03:00
libavdevice	avdevice/alsa_dec: add a ch_layout option	2025-02-01 01:12:17 -03:00
libavfilter	avfilter/drawtext: fix memory leak when using "reinit" runtime command	2025-02-06 17:41:12 -03:00
libavformat	avformat/mxfdec: Check edit unit for overflow in mxf_set_current_edit_unit()	2025-02-06 22:04:12 +01:00
libavutil	avutil/Makefile: fix SKIPHEADERS for AMF	2025-02-04 16:34:51 -03:00
libpostproc	*/version.h: bump after release/7.1 branch	2024-09-24 17:10:35 +02:00
libswresample	libswresample/rematrix: add support for custom order channel layouts	2025-02-05 09:51:08 -03:00
libswscale	swscale/aarch64/output.S: refactor ff_yuv2plane1_8_neon	2025-02-07 12:05:06 +02:00
presets
tests	fate/libswresample: add a test downmixing with a custom order layout	2025-02-06 13:51:23 -03:00
tools	tools/target_swr_fuzzer: do not use negative numbers of samples	2025-01-21 22:55:10 +01:00
.gitattributes	lavf/assenc: normalize line endings to \n	2024-02-11 17:01:07 -08:00
.gitignore	.gitignore: add exclusions for shader .c files	2024-11-18 07:54:21 +01:00
.mailmap	mailmap: add entry for myself	2024-07-15 01:59:37 +02:00
Changelog	avcodec: add a ffv1 parser	2025-02-06 13:48:47 -03:00
configure	avcodec: add a ffv1 parser	2025-02-06 13:48:47 -03:00
CONTRIBUTING.md
COPYING.GPLv2
COPYING.GPLv3
COPYING.LGPLv2.1
COPYING.LGPLv3
CREDITS	Use https for repository links	2023-03-01 21:59:10 +01:00
INSTALL.md	INSTALL: explain the circular dependency issue and solution	2024-11-03 19:35:23 +01:00
LICENSE.md	avfilter/vf_geq: Relicense to LGPL	2019-12-28 11:20:48 +01:00
MAINTAINERS	MAINTAINERS: Lauri is still available but is really low on time nowadays	2024-11-28 23:19:00 +01:00
Makefile	configure: Add wasm as a fake arch	2024-12-04 16:43:06 +08:00
README.md	README: fix typo and description of libavfilter	2021-10-08 09:44:34 +05:30
RELEASE	RELEASE: update release number after release/7.1 branch	2024-10-09 01:55:50 +02:00

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.