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Code Issues Releases Activity

zmbvenc: get rid of a global table

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This commit is contained in:
Anton Khirnov 2016-05-22 21:09:58 +02:00
parent 00b775dda2
commit 296eff4d9d
1 changed files with 9 additions and 7 deletions
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16
libavcodec/zmbvenc.c
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@ -54,16 +54,18 @@ typedef struct ZmbvEncContext {
int comp_size;
int keyint, curfrm;
z_stream zstream;
int score_tab[256];
} ZmbvEncContext;
static int score_tab[256];
/** Block comparing function
* XXX should be optimized and moved to DSPContext
* TODO handle out of edge ME
*/
static inline int block_cmp(uint8_t *src, int stride, uint8_t *src2, int stride2,
int bw, int bh, int *xored)
static inline int block_cmp(ZmbvEncContext *c, uint8_t *src, int stride,
uint8_t *src2, int stride2, int bw, int bh,
int *xored)
{
int sum = 0;
int i, j;
@ -81,7 +83,7 @@ static inline int block_cmp(uint8_t *src, int stride, uint8_t *src2, int stride2
}
for(i = 1; i < 256; i++)
sum += score_tab[histogram[i]];
sum += c->score_tab[histogram[i]];
return sum;
}
@ -97,14 +99,14 @@ static int zmbv_me(ZmbvEncContext *c, uint8_t *src, int sstride, uint8_t *prev,
*mx = *my = 0;
bw = FFMIN(ZMBV_BLOCK, c->avctx->width - x);
bh = FFMIN(ZMBV_BLOCK, c->avctx->height - y);
bv = block_cmp(src, sstride, prev, pstride, bw, bh, xored);
bv = block_cmp(c, src, sstride, prev, pstride, bw, bh, xored);
if(!bv) return 0;
for(ty = FFMAX(y - c->range, 0); ty < FFMIN(y + c->range, c->avctx->height - bh); ty++){
for(tx = FFMAX(x - c->range, 0); tx < FFMIN(x + c->range, c->avctx->width - bw); tx++){
if(tx == x && ty == y) continue; // we already tested this block
dx = tx - x;
dy = ty - y;
tv = block_cmp(src, sstride, prev + dx + dy*pstride, pstride, bw, bh, xored);
tv = block_cmp(c, src, sstride, prev + dx + dy * pstride, pstride, bw, bh, xored);
if(tv < bv){
bv = tv;
*mx = dx;
@ -279,7 +281,7 @@ static av_cold int encode_init(AVCodecContext *avctx)
int lvl = 9;
for(i=1; i<256; i++)
score_tab[i]= -i * log(i/(double)(ZMBV_BLOCK*ZMBV_BLOCK)) * (256/M_LN2);
c->score_tab[i] = -i * log(i / (double)(ZMBV_BLOCK * ZMBV_BLOCK)) * (256 / M_LN2);
c->avctx = avctx;