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fbarchard@google.com 05416e2d9a Box filter for YUV use rows with accumulation buffer for better memory behavior. The old code would do columns accumulated into registers, and then store the result once. This was slow from a memory point of view. The new code does a row of source at a time, updating an accumulation buffer every row. The accumulation buffer is small, and should fit cache. Before each accumulation of N rows, the buffer needs to be reset to zero. If the memset is a bottleneck, it would be faster to do the first row without an add, storing to the accumulation buffer, and then add for the remaining rows. 
BUG=425
TESTED=out\release\libyuv_unittest --gtest_filter=*ScaleTo1x1*
R=harryjin@google.com

Review URL: https://webrtc-codereview.appspot.com/52659004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1428 16f28f9a-4ce2-e073-06de-1de4eb20be90
2015-06-09 01:05:18 +00:00
chromium Make Libyuv work with Chromium Git checkouts 2014-09-23 11:13:29 +00:00
include Box filter for YUV use rows with accumulation buffer for better memory behavior. The old code would do columns accumulated into registers, and then store the result once. This was slow from a memory point of view. The new code does a row of source at a time, updating an accumulation buffer every row. The accumulation buffer is small, and should fit cache. Before each accumulation of N rows, the buffer needs to be reset to zero. If the memset is a bottleneck, it would be faster to do the first row without an add, storing to the accumulation buffer, and then add for the remaining rows. 2015-06-09 01:05:18 +00:00
source Box filter for YUV use rows with accumulation buffer for better memory behavior. The old code would do columns accumulated into registers, and then store the result once. This was slow from a memory point of view. The new code does a row of source at a time, updating an accumulation buffer every row. The accumulation buffer is small, and should fit cache. Before each accumulation of N rows, the buffer needs to be reset to zero. If the memset is a bottleneck, it would be faster to do the first row without an add, storing to the accumulation buffer, and then add for the remaining rows. 2015-06-09 01:05:18 +00:00
tools/valgrind-libyuv Roll chromium_revision 271c6cc..2c3ffb2 (309333:317530) + fixes 2015-02-27 10:20:23 +00:00
unit_test Box filter for YUV use rows with accumulation buffer for better memory behavior. The old code would do columns accumulated into registers, and then store the result once. This was slow from a memory point of view. The new code does a row of source at a time, updating an accumulation buffer every row. The accumulation buffer is small, and should fit cache. Before each accumulation of N rows, the buffer needs to be reset to zero. If the memset is a bottleneck, it would be faster to do the first row without an add, storing to the accumulation buffer, and then add for the remaining rows. 2015-06-09 01:05:18 +00:00
util psnr tool, work around for ios 64 bit compiler where int passed into assembly needs to be explicitely cast to 'w' register. 2015-05-05 23:40:03 +00:00
.gitignore Fix standalone GN build. 2015-03-10 08:16:49 +00:00
all.gyp Android support 2013-11-21 19:57:10 +00:00
Android.mk add new scale_any to build files. 2015-03-30 23:20:14 +00:00
AUTHORS Adding AUTHORS file to libyuv 2011-11-01 20:44:21 +00:00
BUILD.gn Revert "libyuv: Include foo_posix.cc in the gn build, like it's done in the gyp build." 2015-06-05 23:55:57 +00:00
CMakeLists.txt Add test for scaling color accuracy 2015-06-01 22:57:58 +00:00
codereview.settings Add PROJECT setting to codereview.settings 2015-04-28 14:29:24 +00:00
DEPS bump deps to head chromium to get prebuilt clangcl 2015-06-08 22:07:07 +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
drover.properties Add drover.properties for libyuv 2015-02-24 10:06:44 +00:00
gyp_libyuv Make Libyuv work with Chromium Git checkouts 2014-09-23 11:13:29 +00:00
gyp_libyuv.py Minor fixes to gyp_libyuv.py 2014-03-28 19:38:05 +00:00
libyuv_nacl.gyp NaCl/GYP: remove references to prep_toolchain from libyuv. prep_toolchain is now a no-op. 2015-04-22 17:42:21 +00:00
libyuv_test.gyp Add test for scaling color accuracy 2015-06-01 22:57:58 +00:00
libyuv.gyp enable speed optimization for libyuv 2015-05-11 21:58:42 +00:00
libyuv.gypi Add ScaleFilterCols_NEON for ARM32/64 2015-03-19 03:55:05 +00:00
LICENSE Update Copyright notice to follow new chromium conventions. 2012-08-08 19:04:24 +00:00
LICENSE_THIRD_PARTY README.chromium license field for WebView and LICENSE_THIRD_PARTY to show files with special licenses. 2013-04-24 00:12:28 +00:00
linux.mk Remove bayer format support from libyuv. This format is very rare and used on legacy hardware. Its not well optimized and has bugs related to odd widths. Removing the format will allow tests to pass under more circumstances, run faster and allow focus on higher priority quality and performance issues. 2015-02-09 19:58:19 +00:00
OWNERS Remove blank lint from OWNERS. Move FixedDiv into row functions to avoid changing build files. 2013-06-17 23:04:13 +00:00
PATENTS LibYuv: Adding PATENT and LICENSE files 2011-10-25 16:15:49 +00:00
PRESUBMIT.py Roll chromium_revision 271c6cc..2c3ffb2 (309333:317530) + fixes 2015-02-27 10:20:23 +00:00
public.mk Android.mk moved into libyuv to central support 2012-09-19 07:27:17 +00:00
README.chromium make source for planar tests contiguous to test planar functions coalesce into a single low level call. 2015-06-01 23:28:59 +00:00
setup_links.py Fix standalone GN build. 2015-03-10 08:16:49 +00:00
sync_chromium.py Roll chromium_revision 271c6cc..2c3ffb2 (309333:317530) + fixes 2015-02-27 10:20:23 +00:00
winarm.mk Remove bayer format support from libyuv. This format is very rare and used on legacy hardware. Its not well optimized and has bugs related to odd widths. Removing the format will allow tests to pass under more circumstances, run faster and allow focus on higher priority quality and performance issues. 2015-02-09 19:58:19 +00:00

README.chromium 

Name: libyuv
URL: http://code.google.com/p/libyuv/
Version: 1419
License: BSD
License File: LICENSE

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