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| author | Jingning Han <jingning@google.com> | 2015-03-30 12:31:46 -0700 |
|---|---|---|
| committer | Gerrit Code Review <gerrit@gerrit.golo.chromium.org> | 2015-03-30 15:43:31 -0700 |
| commit | 26d3d3af6ace50ee20c474771a580e38f86c7864 (patch) | |
| tree | e5efddaeb43107841dd63e0a0a3607533390728c /vp9/encoder/vp9_avg.c | |
| parent | b4b5af6acddfec0bf28a79f74afb15de3dee6f66 (diff) | |
| download | libvpx-26d3d3af6ace50ee20c474771a580e38f86c7864.tar libvpx-26d3d3af6ace50ee20c474771a580e38f86c7864.tar.gz libvpx-26d3d3af6ace50ee20c474771a580e38f86c7864.tar.bz2 libvpx-26d3d3af6ace50ee20c474771a580e38f86c7864.zip | |
Enable 16x16 Hadamard transform in SATD based mode decision
This commit replaces the 16x16 2D-DCT transform with Hadamard
transform for RTC coding mode. It reduces the CPU cycles cost
on 16x16 transform by 5X. Overall it makes the speed -6 encoding
speed 1.5% faster without compromise on compression performance.
Change-Id: If6c993831dc4c678d841edc804ff395ed37f2a1b
Diffstat (limited to 'vp9/encoder/vp9_avg.c')
| -rw-r--r-- | vp9/encoder/vp9_avg.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/vp9/encoder/vp9_avg.c b/vp9/encoder/vp9_avg.c index b5632a20d..58daa3ad4 100644 --- a/vp9/encoder/vp9_avg.c +++ b/vp9/encoder/vp9_avg.c @@ -78,8 +78,15 @@ void vp9_hadamard_8x8_c(int16_t const *src_diff, int src_stride, } // In place 16x16 2D Hadamard transform -void vp9_hadamard_16x16_c(int16_t *coeff) { +void vp9_hadamard_16x16_c(int16_t const *src_diff, int src_stride, + int16_t *coeff) { int idx; + for (idx = 0; idx < 4; ++idx) { + int16_t const *src_ptr = src_diff + (idx >> 1) * 8 * src_stride + + (idx & 0x01) * 8; + vp9_hadamard_8x8_c(src_ptr, src_stride, coeff + idx * 64); + } + for (idx = 0; idx < 64; ++idx) { int16_t a0 = coeff[0]; int16_t a1 = coeff[64]; |