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lavfi/scale: add nb_slices debug option

This commit is contained in:
Clément Bœsch 2015-12-18 15:44:33 +01:00
parent 484cc66f57
commit 244766e407
1 changed files with 12 additions and 0 deletions
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12
libavfilter/vf_scale.c
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@ -110,6 +110,8 @@ typedef struct ScaleContext {
int in_v_chr_pos;
int force_original_aspect_ratio;
int nb_slices;
} ScaleContext;
AVFilter ff_vf_scale2ref;
@ -575,6 +577,15 @@ static int filter_frame(AVFilterLink *link, AVFrame *in)
if(scale->interlaced>0 || (scale->interlaced<0 && in->interlaced_frame)){
scale_slice(link, out, in, scale->isws[0], 0, (link->h+1)/2, 2, 0);
scale_slice(link, out, in, scale->isws[1], 0, link->h /2, 2, 1);
}else if (scale->nb_slices) {
int i, slice_h, slice_start, slice_end = 0;
const int nb_slices = FFMIN(scale->nb_slices, link->h);
for (i = 0; i < nb_slices; i++) {
slice_start = slice_end;
slice_end = (link->h * (i+1)) / nb_slices;
slice_h = slice_end - slice_start;
scale_slice(link, out, in, scale->sws, slice_start, slice_h, 1, 0);
}
}else{
scale_slice(link, out, in, scale->sws, 0, link->h, 1, 0);
}
@ -651,6 +662,7 @@ static const AVOption scale_options[] = {
{ "increase", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 2 }, 0, 0, FLAGS, "force_oar" },
{ "param0", "Scaler param 0", OFFSET(param[0]), AV_OPT_TYPE_DOUBLE, { .dbl = SWS_PARAM_DEFAULT }, INT_MIN, INT_MAX, FLAGS },
{ "param1", "Scaler param 1", OFFSET(param[1]), AV_OPT_TYPE_DOUBLE, { .dbl = SWS_PARAM_DEFAULT }, INT_MIN, INT_MAX, FLAGS },
{ "nb_slices", "set the number of slices (debug purpose only)", OFFSET(nb_slices), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, FLAGS },
{ NULL }
};