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| author | Deb Mukherjee <debargha@google.com> | 2013-10-10 17:24:55 -0700 |
|---|---|---|
| committer | Deb Mukherjee <debargha@google.com> | 2013-10-11 10:43:02 -0700 |
| commit | d9655e42b84a405a291ad142df748cc7e0364916 (patch) | |
| tree | 244d352758bee6e70846ab81b20206bd6a5fe453 /vp9/encoder/vp9_rdopt.h | |
| parent | 2b055dfe3f244bacaf4c40aede81f83f03a94349 (diff) | |
| download | libvpx-d9655e42b84a405a291ad142df748cc7e0364916.tar libvpx-d9655e42b84a405a291ad142df748cc7e0364916.tar.gz libvpx-d9655e42b84a405a291ad142df748cc7e0364916.tar.bz2 libvpx-d9655e42b84a405a291ad142df748cc7e0364916.zip | |
Change in rddiv parameter to make it a power of 2
Converts the constant rddiv parameter to 128 (from 100) and
implements RDCOST with bit-shift rather than multiplication.
Other parameters are also adjusted to roughly keep the same
balance between Rate and Distortion.
There is a slight speed-up of about 0.5-1% (at speed 0) as
testted on football_cif.
There is a slight change in performance due to small change
in the parameters.
derfraw300: +0.033%
stdhdraw250; +0.102%
Change-Id: I70ac69f58fa71c83108f68fe41796cd19d1fc760
Diffstat (limited to 'vp9/encoder/vp9_rdopt.h')
| -rw-r--r-- | vp9/encoder/vp9_rdopt.h | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/vp9/encoder/vp9_rdopt.h b/vp9/encoder/vp9_rdopt.h index c86ea2723..aa4068d76 100644 --- a/vp9/encoder/vp9_rdopt.h +++ b/vp9/encoder/vp9_rdopt.h @@ -12,8 +12,10 @@ #ifndef VP9_ENCODER_VP9_RDOPT_H_ #define VP9_ENCODER_VP9_RDOPT_H_ +#define RDDIV_BITS 7 + #define RDCOST(RM, DM, R, D) \ - (((128 + ((int64_t)R) * (RM)) >> 8) + ((int64_t)DM) * (D)) + (((128 + ((int64_t)R) * (RM)) >> 8) + (D << DM)) #define QIDX_SKIP_THRESH 115 void vp9_initialize_rd_consts(VP9_COMP *cpi, int qindex); |