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Before this patch, prof_grad_filter calculate
gh[0], gh[1], gv[0], gv[1] and save them to stack.
derive_bdof_vx_vy load them from stack and calculate
gh[0] + gh[1], gv[0] + gv[1].
apply_bdof_min_block load them from stack and calculate
gh[0] - gh[1], gv[0] - gv[1]
This patch add bdof_grad_filter, which calculate gh[0] + gh[1],
gh[0] - gh[1], gv[0] + gv[1], gv[0] - gv[1], and save them to
stack, so derive_bdof_vx_vy and apply_bdof_min_block can use the
results directly.
prof_grad_filter is kept for reuse by other functions in the future.
Benchmark on rpi5 with gcc 12
Before After
--------------------------------------------------------------------
apply_bdof_8_8x16_c: | 7431.4 ( 1.00x) | 7371.7 ( 1.00x)
apply_bdof_8_8x16_neon: | 1175.4 ( 6.32x) | 1036.3 ( 7.11x)
apply_bdof_8_16x8_c: | 7182.2 ( 1.00x) | 7201.1 ( 1.00x)
apply_bdof_8_16x8_neon: | 1021.7 ( 7.03x) | 879.9 ( 8.18x)
apply_bdof_8_16x16_c: | 14577.1 ( 1.00x) | 14589.3 ( 1.00x)
apply_bdof_8_16x16_neon: | 2012.8 ( 7.24x) | 1743.3 ( 8.37x)
apply_bdof_10_8x16_c: | 7292.4 ( 1.00x) | 7308.5 ( 1.00x)
apply_bdof_10_8x16_neon: | 1156.3 ( 6.31x) | 1045.3 ( 6.99x)
apply_bdof_10_16x8_c: | 7112.4 ( 1.00x) | 7214.4 ( 1.00x)
apply_bdof_10_16x8_neon: | 1007.6 ( 7.06x) | 904.8 ( 7.97x)
apply_bdof_10_16x16_c: | 14363.3 ( 1.00x) | 14476.4 ( 1.00x)
apply_bdof_10_16x16_neon: | 1986.9 ( 7.23x) | 1783.1 ( 8.12x)
apply_bdof_12_8x16_c: | 7433.3 ( 1.00x) | 7374.7 ( 1.00x)
apply_bdof_12_8x16_neon: | 1155.9 ( 6.43x) | 1040.8 ( 7.09x)
apply_bdof_12_16x8_c: | 7171.1 ( 1.00x) | 7376.3 ( 1.00x)
apply_bdof_12_16x8_neon: | 1010.8 ( 7.09x) | 899.4 ( 8.20x)
apply_bdof_12_16x16_c: | 14515.5 ( 1.00x) | 14731.5 ( 1.00x)
apply_bdof_12_16x16_neon: | 1988.4 ( 7.30x) | 1785.2 ( 8.25x)
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.