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Martin Storsjö 1e5d87eec3 arm: Add NEON optimizations for 10 and 12 bit vp9 loop filter 
This work is sponsored by, and copyright, Google.

This is pretty much similar to the 8 bpp version, but in some senses
simpler. All input pixels are 16 bits, and all intermediates also fit
in 16 bits, so there's no lengthening/narrowing in the filter at all.

For the full 16 pixel wide filter, we can only process 4 pixels at a time
(using an implementation very much similar to the one for 8 bpp),
but we can do 8 pixels at a time for the 4 and 8 pixel wide filters with
a different implementation of the core filter.

Examples of relative speedup compared to the C version, from checkasm:
                                   Cortex    A7     A8     A9    A53
vp9_loop_filter_h_4_8_10bpp_neon:          1.83   2.16   1.40   2.09
vp9_loop_filter_h_8_8_10bpp_neon:          1.39   1.67   1.24   1.70
vp9_loop_filter_h_16_8_10bpp_neon:         1.56   1.47   1.10   1.81
vp9_loop_filter_h_16_16_10bpp_neon:        1.94   1.69   1.33   2.24
vp9_loop_filter_mix2_h_44_16_10bpp_neon:   2.01   2.27   1.67   2.39
vp9_loop_filter_mix2_h_48_16_10bpp_neon:   1.84   2.06   1.45   2.19
vp9_loop_filter_mix2_h_84_16_10bpp_neon:   1.89   2.20   1.47   2.29
vp9_loop_filter_mix2_h_88_16_10bpp_neon:   1.69   2.12   1.47   2.08
vp9_loop_filter_mix2_v_44_16_10bpp_neon:   3.16   3.98   2.50   4.05
vp9_loop_filter_mix2_v_48_16_10bpp_neon:   2.84   3.64   2.25   3.77
vp9_loop_filter_mix2_v_84_16_10bpp_neon:   2.65   3.45   2.16   3.54
vp9_loop_filter_mix2_v_88_16_10bpp_neon:   2.55   3.30   2.16   3.55
vp9_loop_filter_v_4_8_10bpp_neon:          2.85   3.97   2.24   3.68
vp9_loop_filter_v_8_8_10bpp_neon:          2.27   3.19   1.96   3.08
vp9_loop_filter_v_16_8_10bpp_neon:         3.42   2.74   2.26   4.40
vp9_loop_filter_v_16_16_10bpp_neon:        2.86   2.44   1.93   3.88

The speedup vs C code measured in checkasm is around 1.1-4x.
These numbers are quite inconclusive though, since the checkasm test
runs multiple filterings on top of each other, so later rounds might
end up with different codepaths (different decisions on which filter
to apply, based on input pixel differences).

Based on START_TIMER/STOP_TIMER wrapping around a few individual
functions, the speedup vs C code is around 2-4x.

Signed-off-by: Martin Storsjö <martin@martin.st>
2017-01-24 22:35:59 +02:00
compat
doc avfilter: add EIA-608 line extractor 2017-01-24 10:20:10 +01:00
libavcodec arm: Add NEON optimizations for 10 and 12 bit vp9 loop filter 2017-01-24 22:35:59 +02:00
libavdevice lavd/lavfi: use buffersink accessors. 2017-01-12 14:06:16 +01:00
libavfilter avfilter: add EIA-608 line extractor 2017-01-24 10:20:10 +01:00
libavformat avformat/hlsenc: improve to write m3u8 head block 2017-01-24 22:25:29 +08:00
libavresample
libavutil hwcontext_cuda: implement frames_get_constraints 2017-01-23 16:21:18 +01:00
libpostproc
libswresample swresample/arm: cosmetic fixes 2017-01-13 21:24:25 +01:00
libswscale
presets
tests Merge commit '71a0472114574993df7035f4de9aa007e03817b8' 2017-01-24 19:21:29 +01:00
tools
.gitattributes
.gitignore
.travis.yml
arch.mak
Changelog avfilter: add EIA-608 line extractor 2017-01-24 10:20:10 +01:00
cmdutils_common_opts.h
cmdutils_opencl.c cmdutils_opencl: fix resource_leak cid 1396852 2017-01-13 07:54:49 +08:00
cmdutils.c
cmdutils.h
common.mak
configure vaapi_hevc: Convert to use the new VAAPI hwaccel code 2017-01-17 23:06:46 +00:00
CONTRIBUTING.md
COPYING.GPLv2
COPYING.GPLv3
COPYING.LGPLv2.1
COPYING.LGPLv3
CREDITS
ffmpeg_cuvid.c
ffmpeg_dxva2.c
ffmpeg_filter.c ffmpeg: use buffersink accessors. 2017-01-12 14:06:16 +01:00
ffmpeg_opt.c ffmpeg: Add -time_base option to hint the time base 2017-01-14 20:03:56 +01:00
ffmpeg_qsv.c ffmpeg: Add an option "qsv_device" to choose proper node for QSV child device (vaapi or dxva2) 2017-01-11 20:21:09 +00:00
ffmpeg_vaapi.c ffmpeg_vaapi: Convert to use hw_frames_ctx only 2017-01-17 23:06:46 +00:00
ffmpeg_vdpau.c
ffmpeg_videotoolbox.c
ffmpeg.c ffmpeg: pass output stream duration as a hint to the muxer 2017-01-19 01:54:49 +01:00
ffmpeg.h ffmpeg: Add -time_base option to hint the time base 2017-01-14 20:03:56 +01:00
ffplay.c ffplay: fix indentation after last commit 2017-01-22 16:17:50 +01:00
ffprobe.c
ffserver_config.c
ffserver_config.h
ffserver.c
INSTALL.md
library.mak
LICENSE.md
MAINTAINERS dxva2: allow an empty array of ID3D11VideoDecoderOutputView 2017-01-16 02:54:04 +01:00
Makefile
README.md
RELEASE
version.sh

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 a mean to alter decoded Audio and Video through chain of 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.
  • ffserver is a multimedia streaming server for live broadcasts.
  • 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.