From e4f030be87735114f5e70ba45e006c1afbdd0872 Mon Sep 17 00:00:00 2001 From: Yunqing Wang Date: Thu, 11 Oct 2018 15:13:47 -0700 Subject: [PATCH] Make 4-tap interp filter coefficients even numbers This CL modified 4-tap interp filter coefficients to be even numbers, which would help in writing 4-tap filter SIMD optimizations. The coding performance change was negligible. Speed 1 borg test showed: avg_psnr: ovr_psnr: ssim: lowres: -0.003 -0.012 -0.017 midres: 0.029 0.018 0.043 hdres: 0.024 0.044 0.033 Change-Id: Id7c54bb9a9c1aee19c41bc6f1dc3b9682d158bba --- vp9/common/vp9_filter.c | 16 ++++++++-------- 1 file changed, 8 insertions(+), 8 deletions(-) diff --git a/vp9/common/vp9_filter.c b/vp9/common/vp9_filter.c index cadae6f..adbda6c 100644 --- a/vp9/common/vp9_filter.c +++ b/vp9/common/vp9_filter.c @@ -66,14 +66,14 @@ DECLARE_ALIGNED(256, static const InterpKernel, // 4-tap filter DECLARE_ALIGNED(256, static const InterpKernel, sub_pel_filters_4[SUBPEL_SHIFTS]) = { - { 0, 0, 0, 128, 0, 0, 0, 0 }, { 0, 0, -3, 125, 8, -2, 0, 0 }, - { 0, 0, -6, 120, 18, -4, 0, 0 }, { 0, 0, -8, 115, 27, -6, 0, 0 }, - { 0, 0, -10, 108, 37, -7, 0, 0 }, { 0, 0, -11, 101, 47, -9, 0, 0 }, - { 0, 0, -11, 93, 56, -10, 0, 0 }, { 0, 0, -12, 85, 66, -11, 0, 0 }, - { 0, 0, -11, 75, 75, -11, 0, 0 }, { 0, 0, -11, 66, 85, -12, 0, 0 }, - { 0, 0, -10, 56, 93, -11, 0, 0 }, { 0, 0, -9, 47, 101, -11, 0, 0 }, - { 0, 0, -7, 37, 108, -10, 0, 0 }, { 0, 0, -6, 27, 115, -8, 0, 0 }, - { 0, 0, -4, 18, 120, -6, 0, 0 }, { 0, 0, -2, 8, 125, -3, 0, 0 } + { 0, 0, 0, 128, 0, 0, 0, 0 }, { 0, 0, -4, 126, 8, -2, 0, 0 }, + { 0, 0, -6, 120, 18, -4, 0, 0 }, { 0, 0, -8, 114, 28, -6, 0, 0 }, + { 0, 0, -10, 108, 36, -6, 0, 0 }, { 0, 0, -12, 102, 46, -8, 0, 0 }, + { 0, 0, -12, 94, 56, -10, 0, 0 }, { 0, 0, -12, 84, 66, -10, 0, 0 }, + { 0, 0, -12, 76, 76, -12, 0, 0 }, { 0, 0, -10, 66, 84, -12, 0, 0 }, + { 0, 0, -10, 56, 94, -12, 0, 0 }, { 0, 0, -8, 46, 102, -12, 0, 0 }, + { 0, 0, -6, 36, 108, -10, 0, 0 }, { 0, 0, -6, 28, 114, -8, 0, 0 }, + { 0, 0, -4, 18, 120, -6, 0, 0 }, { 0, 0, -2, 8, 126, -4, 0, 0 } }; const InterpKernel *vp9_filter_kernels[5] = { -- 2.7.4