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cost_coeff speed improvements

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Preliminary tests indicated that these changes make cost_coeffs
approximately 20% faster which is a 2% improvement overall

Change-Id: Iaf013ba75884415cd824e98349f654ffb1c3ef33
This commit is contained in:
Julia Robson
2016-02-17 15:52:31 +00:00
parent 907f88c4e6
commit c6eba0b47a
3 changed files with 99 additions and 34 deletions
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13
vp10/encoder/tokenize.h
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@@ -76,6 +76,7 @@ extern const int16_t *vp10_dct_value_cost_ptr;
*/
extern const TOKENVALUE *vp10_dct_value_tokens_ptr;
extern const TOKENVALUE *vp10_dct_cat_lt_10_value_tokens;
extern const int *vp10_dct_cat_lt_10_value_cost;
extern const int16_t vp10_cat6_low_cost[256];
extern const int vp10_cat6_high_cost[64];
extern const int vp10_cat6_high10_high_cost[256];
@@ -119,6 +120,18 @@ static INLINE int16_t vp10_get_token(int v) {
return vp10_dct_cat_lt_10_value_tokens[v].token;
}
static INLINE int vp10_get_token_cost(int v, int16_t *token,
const int *cat6_high_table) {
if (v >= CAT6_MIN_VAL || v <= -CAT6_MIN_VAL) {
EXTRABIT extrabits;
*token = CATEGORY6_TOKEN;
extrabits = abs(v) - CAT6_MIN_VAL;
return vp10_cat6_low_cost[extrabits & 0xff]
+ cat6_high_table[extrabits >> 8];
}
*token = vp10_dct_cat_lt_10_value_tokens[v].token;
return vp10_dct_cat_lt_10_value_cost[v];
}
#ifdef __cplusplus
} // extern "C"