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1e9cfa5bb0
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Hubert Mazur 1e9cfa5bb0 sw_scale: Add specializations for hscale 8 to 19 
Add arm64 neon implementations for hscale 8 to 19 with filter
sizes 4, 4X and 8. Both implementations are based on very similar ones
dedicated to hscale 8 to 15. The major changes refer to saving
the data - instead of writing the result as int16_t it is done
with int32_t.

These functions are heavily inspired on patches provided by J. Swinney
and M. Storsjö for hscale8to15 which were slightly adapted for
hscale8to19.

The tests and benchmarks run on AWS Graviton 2 instances. The results
from a checkasm tool shown below.

hscale_8_to_19__fs_4_dstW_512_c: 5663.2
hscale_8_to_19__fs_4_dstW_512_neon: 1259.7
hscale_8_to_19__fs_8_dstW_512_c: 9306.0
hscale_8_to_19__fs_8_dstW_512_neon: 2020.2
hscale_8_to_19__fs_12_dstW_512_c: 12932.7
hscale_8_to_19__fs_12_dstW_512_neon: 2462.5
hscale_8_to_19__fs_16_dstW_512_c: 16844.2
hscale_8_to_19__fs_16_dstW_512_neon: 4671.2
hscale_8_to_19__fs_32_dstW_512_c: 32803.7
hscale_8_to_19__fs_32_dstW_512_neon: 5474.2
hscale_8_to_19__fs_40_dstW_512_c: 40948.0
hscale_8_to_19__fs_40_dstW_512_neon: 6669.7

Signed-off-by: Hubert Mazur <hum@semihalf.com>
Signed-off-by: Martin Storsjö <martin@martin.st>
2022-11-01 15:24:43 +02:00
compat compat/cuda: switch from powf to __powf intrinsic 2022-09-03 20:27:34 +02:00
doc avutil/channel_layout: add a cube channel layout 2022-10-30 16:18:30 -03:00
ffbuild configure: probe RISC-V Vector extension 2022-09-27 13:19:52 +02:00
fftools fftools/ffmpeg_demux: stop modifying OptionsContext 2022-10-25 11:13:03 +02:00
libavcodec avcodec/svq1dec: detect buggy FFmpeg encoder and apply correction to interframe mean symbols 2022-11-01 10:14:31 +11:00
libavdevice avdevice/avdevice: Fix mismatching argument name 2022-10-17 09:51:47 +02:00
libavfilter avfilter/vf_frei0r: set align to 1 for frei0r frames 2022-10-29 17:11:14 +02:00
libavformat avformat/mov_chan: use the cube layout 2022-10-30 16:46:48 -03:00
libavutil avutil/channel_layout: add a cube channel layout 2022-10-30 16:18:30 -03:00
libpostproc configure: always enable gnu_windres if available 2022-08-13 14:42:36 +02:00
libswresample swresample: Fix Doxy reference to AVOptions 2022-10-17 09:55:19 +02:00
libswscale sw_scale: Add specializations for hscale 8 to 19 2022-11-01 15:24:43 +02:00
presets
tests avcodec/svq1: fix interframe mean VLC symbols 2022-11-01 09:24:29 +11:00
tools tools/target_dec_fuzzer: Adjust threshold for FFV1 2022-10-20 21:42:21 +02:00
.gitattributes
.gitignore
.mailmap
.travis.yml
Changelog avcodec: ViewQuest VQC decoder 2022-10-18 13:20:37 +11:00
configure configure: add pkg-config check for OpenAL 2022-10-31 18:42:12 +01:00
CONTRIBUTING.md
COPYING.GPLv2
COPYING.GPLv3
COPYING.LGPLv2.1
COPYING.LGPLv3
CREDITS
INSTALL.md
LICENSE.md
MAINTAINERS MAINTAINERS: remove the project leader section 2022-09-23 16:06:11 +02:00
Makefile configure: probe RISC-V Vector extension 2022-09-27 13:19:52 +02:00
README.md
RELEASE RELEASE: update after 5.1 branch 2022-07-13 00:31:42 +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.