golang-image

Author	SHA1	Message	Date
Rui Ueyama	dc115882f1	go.image/vp8: use branch-free abs This change seems to restore performance to the level before CL 108140045. benchmark old ns/op new ns/op delta BenchmarkDecodeVP8SimpleFilter 796416 784394 -1.51% BenchmarkDecodeVP8NormalFilter 4931138 4693078 -4.83% BenchmarkDecodeVP8L 7820030 7821796 +0.02% LGTM=nigeltao, r R=nigeltao, r CC=golang-codereviews https://golang.org/cl/107340047	2014-06-30 10:33:37 +10:00
Nigel Tao	f8a86727c2	go.image/vp8: remove the filter look-up tables. The benchmarks are a little slower, but the code is shorter. benchmark old ns/op new ns/op delta BenchmarkDecodeVP8SimpleFilter 621950 644184 +3.57% BenchmarkDecodeVP8NormalFilter 4045745 4269431 +5.53% LGTM=r R=r, minux, ruiu CC=golang-codereviews https://golang.org/cl/108140045	2014-06-27 09:14:15 +10:00
Nigel Tao	0424e74a0e	go.image/vp8: implement the normal filter. The testdata was generated via: cwebp foo.png -o foo.lossy.webp dwebp -pgm foo.lossy.webp -o tmp.pgm convert tmp.pgm foo.lossy.webp.ycbcr.png rm tmp.pgm TBR=r R=r CC=golang-codereviews https://golang.org/cl/107330043	2014-06-26 13:29:30 +10:00
Nigel Tao	72be9c51b1	go.image/vp8: implement the loop filter. The testdata files were created by: cwebp video-001.png -o video-001.webp dwebp -pgm video-001.webp -o tmp.pgm convert tmp.pgm video-001.webp.ycbcr.png rm tmp.pgm LGTM=r R=r CC=chaishushan, golang-codereviews https://golang.org/cl/91700044	2014-05-27 10:52:02 +10:00