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Code Issues Releases Activity

vf_lut: avoid rgb component indexing in the inner loop

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15k->10k cpu cycles

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2012-04-03 18:30:07 +02:00
parent 002d9ded4a
commit 38477e1981
1 changed files with 10 additions and 6 deletions
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16
libavfilter/vf_lut.c
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@ -244,6 +244,9 @@ static int config_props(AVFilterLink *inlink)
for (comp = 0; comp < desc->nb_components; comp++) { for (comp = 0; comp < desc->nb_components; comp++) {
double res; double res;
int tcomp;
for (tcomp = 0; lut->rgba_map[tcomp] != comp; tcomp++)
;
/* create the parsed expression */ /* create the parsed expression */
ret = av_expr_parse(&lut->comp_expr[comp], lut->comp_expr_str[comp], ret = av_expr_parse(&lut->comp_expr[comp], lut->comp_expr_str[comp],
@ -273,8 +276,8 @@ static int config_props(AVFilterLink *inlink)
lut->comp_expr_str[comp], val, comp); lut->comp_expr_str[comp], val, comp);
return AVERROR(EINVAL); return AVERROR(EINVAL);
} }
lut->lut[comp][val] = av_clip((int)res, min[comp], max[comp]); lut->lut[tcomp][val] = av_clip((int)res, min[comp], max[comp]);
av_log(ctx, AV_LOG_DEBUG, "val[%d][%d] = %d\n", comp, val, lut->lut[comp][val]); av_log(ctx, AV_LOG_DEBUG, "val[%d][%d] = %d\n", comp, val, lut->lut[tcomp][val]);
} }
} }
@ -298,16 +301,17 @@ static void draw_slice(AVFilterLink *inlink, int y, int h, int slice_dir)
for (i = 0; i < h; i ++) { for (i = 0; i < h; i ++) {
int w = inlink->w; int w = inlink->w;
const uint8_t (*tab)[256] = lut->lut;
inrow = inrow0; inrow = inrow0;
outrow = outrow0; outrow = outrow0;
for (j = 0; j < w; j++) { for (j = 0; j < w; j++) {
outrow[0] = lut->lut[lut->rgba_map[0]][inrow[0]]; outrow[0] = tab[0][inrow[0]];
if (lut->step>1) { if (lut->step>1) {
outrow[1] = lut->lut[lut->rgba_map[1]][inrow[1]]; outrow[1] = tab[1][inrow[1]];
if (lut->step>2) { if (lut->step>2) {
outrow[2] = lut->lut[lut->rgba_map[2]][inrow[2]]; outrow[2] = tab[2][inrow[2]];
if (lut->step>3) { if (lut->step>3) {
outrow[3] = lut->lut[lut->rgba_map[3]][inrow[3]]; outrow[3] = tab[3][inrow[3]];
} }
} }
} }