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Don't extract and update one word of one and the same register at a time; use separate src and dst registers, so that pextrw and bsr can be done in parallel. Also use movd instead of pinsrw for the first word. Old benchmarks: apply_bdof_8_8x16_c: 3275.2 ( 1.00x) apply_bdof_8_8x16_avx2: 487.6 ( 6.72x) apply_bdof_8_16x8_c: 3243.1 ( 1.00x) apply_bdof_8_16x8_avx2: 284.4 (11.40x) apply_bdof_8_16x16_c: 6501.8 ( 1.00x) apply_bdof_8_16x16_avx2: 570.0 (11.41x) apply_bdof_10_8x16_c: 3286.5 ( 1.00x) apply_bdof_10_8x16_avx2: 461.7 ( 7.12x) apply_bdof_10_16x8_c: 3274.5 ( 1.00x) apply_bdof_10_16x8_avx2: 271.4 (12.06x) apply_bdof_10_16x16_c: 6590.0 ( 1.00x) apply_bdof_10_16x16_avx2: 543.9 (12.12x) apply_bdof_12_8x16_c: 3307.6 ( 1.00x) apply_bdof_12_8x16_avx2: 462.2 ( 7.16x) apply_bdof_12_16x8_c: 3287.4 ( 1.00x) apply_bdof_12_16x8_avx2: 271.8 (12.10x) apply_bdof_12_16x16_c: 6465.7 ( 1.00x) apply_bdof_12_16x16_avx2: 543.8 (11.89x) New benchmarks: apply_bdof_8_8x16_c: 3255.7 ( 1.00x) apply_bdof_8_8x16_avx2: 349.3 ( 9.32x) apply_bdof_8_16x8_c: 3262.5 ( 1.00x) apply_bdof_8_16x8_avx2: 214.8 (15.19x) apply_bdof_8_16x16_c: 6471.6 ( 1.00x) apply_bdof_8_16x16_avx2: 429.8 (15.06x) apply_bdof_10_8x16_c: 3227.7 ( 1.00x) apply_bdof_10_8x16_avx2: 321.6 (10.04x) apply_bdof_10_16x8_c: 3250.2 ( 1.00x) apply_bdof_10_16x8_avx2: 201.2 (16.16x) apply_bdof_10_16x16_c: 6476.5 ( 1.00x) apply_bdof_10_16x16_avx2: 400.9 (16.16x) apply_bdof_12_8x16_c: 3230.7 ( 1.00x) apply_bdof_12_8x16_avx2: 321.8 (10.04x) apply_bdof_12_16x8_c: 3210.5 ( 1.00x) apply_bdof_12_16x8_avx2: 200.9 (15.98x) apply_bdof_12_16x16_c: 6474.5 ( 1.00x) apply_bdof_12_16x16_avx2: 400.2 (16.18x) Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
FFmpeg README
FFmpeg is a collection of libraries and tools to process multimedia content such as audio, video, subtitles and related metadata.
Libraries
libavcodecprovides implementation of a wider range of codecs.libavformatimplements streaming protocols, container formats and basic I/O access.libavutilincludes hashers, decompressors and miscellaneous utility functions.libavfilterprovides means to alter decoded audio and video through a directed graph of connected filters.libavdeviceprovides an abstraction to access capture and playback devices.libswresampleimplements audio mixing and resampling routines.libswscaleimplements 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,ismindexandqt-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.