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Frank Barchard 3db22ebc4b RAWToJ400 and RGBToJ400 use 2 step row function for Intel. RAWToJ400 Was 3996 ms, now 3309. 20.7% faster. 
Call a row function for each row, based on ARGBToI400 code.
But implement row functions as 2 step conversion.  Adds the
row functions:
RAWToYJ, RGBToYJ, SSSE3 and AVX2 versions, and Any versions.
The smaller row buffer is more cache friendly on large images.

The max cache size can be configured, and is currently:
// Maximum temporary width for wrappers to process at a time, in pixels.
And the row buffer is
  SIMD_ALIGNED(uint8_t row[MAXTWIDTH * 4]);
So 8192 bytes are used for the row buffer, leaving the rest for source
and destination buffers.

blaze-bin/third_party/libyuv/libyuv_test '--gunit_filter=*R*To?400_Opt' --libyuv_width=3600 --libyuv_height=2500 --libyuv_repeat=1000 --libyuv_flags=-1 --libyuv_cpu_info=-1 | sortms

Was
RAWToJ400_Opt (3996 ms)
ARGBToI400_Opt (3964 ms)
RGB24ToJ400_Opt (3960 ms)
ARGBToJ400_Opt (3909 ms)
RGBAToJ400_Opt (3885 ms)

Now
ARGBToJ400_Opt (4091 ms)
ARGBToI400_Opt (3936 ms)
RGBAToJ400_Opt (3428 ms)
RGB24ToJ400_Opt (3324 ms)
RAWToJ400_Opt (3309 ms)

Bug: libyuv:854, b/147753855
Change-Id: Ieb65fbda94e812c737f4c3c74107354b73c4bcd2
Reviewed-on: https://chromium-review.googlesource.com/c/libyuv/libyuv/+/2016203
Reviewed-by: richard winterton <rrwinterton@gmail.com>
Commit-Queue: Frank Barchard <fbarchard@chromium.org>
2020-01-23 03:23:38 +00:00
build_overrides Make libyuv use the hermetic xcode toolchain. 2018-03-20 08:28:33 +00:00
docs Add support for BT.2020. 2019-10-29 21:06:48 +00:00
include RAWToJ400 and RGBToJ400 use 2 step row function for Intel. RAWToJ400 Was 3996 ms, now 3309. 20.7% faster. 2020-01-23 03:23:38 +00:00
source RAWToJ400 and RGBToJ400 use 2 step row function for Intel. RAWToJ400 Was 3996 ms, now 3309. 20.7% faster. 2020-01-23 03:23:38 +00:00
tools_libyuv Fix chromium autoroller to parse new clang revision format. 2019-07-18 12:43:27 +00:00
unit_test RAWToJ400 for big endian RGB to grey scale. 2020-01-16 00:29:11 +00:00
util Add AYUVToNV12 and NV21ToNV12 2019-04-12 17:48:45 +00:00
.clang-format clang-format libyuv 2016-11-07 17:37:23 -08:00
.gitignore Update to r1732 for more robust jpeg 2019-07-01 22:32:36 +00:00
.gn Allowing C++14 in libyuv. 2019-09-17 17:53:26 +00:00
.vpython [vpython]: Add pypiwin32 2018-07-31 19:31:36 +00:00
Android.bp Sync up Android.bp file with master 2019-07-02 00:15:11 +00:00
Android.mk MMI ifdef guards and add source to various build files. 2018-08-03 18:37:23 +00:00
AUTHORS Revert "Allow negative height when ConvertToI420/ARGB is called with NV12/NV21" 2018-06-01 00:19:40 +00:00
BUILD.gn Upstream minor changes. Faster tests, Faster YUV Rotate180 and Mirror 2019-11-13 20:02:40 +00:00
cleanup_links.py Use DEPS for all dependencies + add PRESUBMIT.py 2017-02-03 11:36:53 +00:00
CM_linux_packages.cmake Add installer builds to cmake for linux 2017-01-26 23:05:17 +00:00
CMakeLists.txt Make the gflags library optional in the CMake build 2018-03-31 00:40:15 +00:00
codereview.settings Make Gerrit the default for libyuv code reviews 2017-01-24 18:34:48 +00:00
DEPS Roll chromium_revision 08ed8f8301..30ccb0cb50 (693151:695606) 2019-09-11 14:17:25 +00:00
download_vs_toolchain.py Roll chromium_revision 260824:262938 + fix binutils. Since it's not possible to have platform-specific hooks executing, binutils must be downloaded for all platforms in order for the download.py hook to execute properly on non-unix platforms. 2014-04-11 23:40:41 +00:00
libyuv.gni libyuv:loongson optimize compare/row/scale/rotate files with mmi. 2018-07-20 22:53:04 +00:00
LICENSE Update Copyright notice to follow new chromium conventions. 2012-08-08 19:04:24 +00:00
linux.mk MMI ifdef guards and add source to various build files. 2018-08-03 18:37:23 +00:00
OWNERS Add "# COMPONENT" to libyuv OWNERS file 2019-10-09 00:21:03 +00:00
PATENTS LibYuv: Adding PATENT and LICENSE files 2011-10-25 16:15:49 +00:00
PRESUBMIT.py Use DEPS for all dependencies + add PRESUBMIT.py 2017-02-03 11:36:53 +00:00
public.mk use unix line endings 2018-06-20 23:19:59 +00:00
pylintrc Use DEPS for all dependencies + add PRESUBMIT.py 2017-02-03 11:36:53 +00:00
README.chromium RAWToJ400 and RGBToJ400 use 2 step row function for Intel. RAWToJ400 Was 3996 ms, now 3309. 20.7% faster. 2020-01-23 03:23:38 +00:00
README.md README: fix doc links 2018-08-13 18:28:55 +00:00
winarm.mk Adds files and functions for rotate any, but does not hook them up to the caller. 2015-07-27 10:32:08 -07:00

README.md

libyuv is an open source project that includes YUV scaling and conversion functionality.

  • Scale YUV to prepare content for compression, with point, bilinear or box filter.
  • Convert to YUV from webcam formats for compression.
  • Convert to RGB formats for rendering/effects.
  • Rotate by 90/180/270 degrees to adjust for mobile devices in portrait mode.
  • Optimized for SSSE3/AVX2 on x86/x64.
  • Optimized for Neon on Arm.
  • Optimized for MSA on Mips.

Development

See Getting started for instructions on how to get started developing.

You can also browse the docs directory for more documentation.