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avfilter/vf_chromanr: add also euclidean distance for calculations

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This commit is contained in:
Paul B Mahol 2021-07-17 15:18:30 +02:00
parent 7f6d20931b
commit 075157ec86
2 changed files with 53 additions and 23 deletions
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20
doc/filters.texi
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@ -7857,7 +7857,7 @@ Set threshold for averaging chrominance values.
Sum of absolute difference of Y, U and V pixel components of current
pixel and neighbour pixels lower than this threshold will be used in
averaging. Luma component is left unchanged and is copied to output.
Default value is 30. Allowed range is from 1 to 200.
Default value is 30. Allowed range is from 1 to 5000.
@item sizew
Set horizontal radius of rectangle used for averaging.
@ -7881,19 +7881,31 @@ Mostly useful to speed-up filtering.
Set Y threshold for averaging chrominance values.
Set finer control for max allowed difference between Y components
of current pixel and neigbour pixels.
Default value is 200. Allowed range is from 1 to 200.
Default value is 5000. Allowed range is from 1 to 5000.
@item threu
Set U threshold for averaging chrominance values.
Set finer control for max allowed difference between U components
of current pixel and neigbour pixels.
Default value is 200. Allowed range is from 1 to 200.
Default value is 5000. Allowed range is from 1 to 5000.
@item threv
Set V threshold for averaging chrominance values.
Set finer control for max allowed difference between V components
of current pixel and neigbour pixels.
Default value is 200. Allowed range is from 1 to 200.
Default value is 5000. Allowed range is from 1 to 5000.
@item distance
Set distance type used in calculations.
@table @samp
@item manhattan
Absolute difference.
@item euclidean
Difference squared.
@end table
Default distance type is manhattan.
@end table
@subsection Commands

48
libavfilter/vf_chromanr.c
View File

@ -35,6 +35,7 @@ typedef struct ChromaNRContext {
float threshold_y;
float threshold_u;
float threshold_v;
int distance;
int thres;
int thres_y;
int thres_u;
@ -79,8 +80,11 @@ static int query_formats(AVFilterContext *ctx)
return ff_set_common_formats(ctx, fmts_list);
}
#define FILTER_FUNC(name, type) \
static int filter_slice##name(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs) \
#define SQR(x) ((x)*(x))
#define FILTER_FUNC(distance, name, ctype, type, fun) \
static int distance ## _slice##name(AVFilterContext *ctx, void *arg, \
int jobnr, int nb_jobs) \
{ \
ChromaNRContext *s = ctx->priv; \
AVFrame *in = arg; \
@ -146,13 +150,13 @@ static int filter_slice##name(AVFilterContext *ctx, void *arg, int jobnr, int nb
const type *in_vptr = (const type *)(in->data[2] + yy * in_vlinesize); \
\
for (int xx = FFMAX(0, x - sizew); xx < FFMIN(x + sizew, w); xx += stepw) { \
const int Y = in_yptr[xx * chroma_w]; \
const int U = in_uptr[xx]; \
const int V = in_vptr[xx]; \
const ctype Y = in_yptr[xx * chroma_w]; \
const ctype U = in_uptr[xx]; \
const ctype V = in_vptr[xx]; \
\
if (FFABS(cu - U) + FFABS(cv - V) + FFABS(cy - Y) < thres && \
FFABS(cu - U) < thres_u && FFABS(cv - V) < thres_v && \
FFABS(cy - Y) < thres_y && \
if (fun(cu - U) + fun(cv - V) + fun(cy - Y) < thres && \
fun(cu - U) < thres_u && fun(cv - V) < thres_v && \
fun(cy - Y) < thres_y && \
xx != x && yy != y) { \
su += U; \
sv += V; \
@ -172,8 +176,11 @@ static int filter_slice##name(AVFilterContext *ctx, void *arg, int jobnr, int nb
return 0; \
}
FILTER_FUNC(8, uint8_t)
FILTER_FUNC(16, uint16_t)
FILTER_FUNC(manhattan, 8, int, uint8_t, FFABS)
FILTER_FUNC(manhattan, 16, int, uint16_t, FFABS)
FILTER_FUNC(euclidean, 8, int, uint8_t, SQR)
FILTER_FUNC(euclidean, 16, int64_t, uint16_t, SQR)
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
{
@ -182,6 +189,15 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *in)
ChromaNRContext *s = ctx->priv;
AVFrame *out;
switch (s->distance) {
case 0:
s->filter_slice = s->depth <= 8 ? manhattan_slice8 : manhattan_slice16;
break;
case 1:
s->filter_slice = s->depth <= 8 ? euclidean_slice8 : euclidean_slice16;
break;
}
s->thres = s->threshold * (1 << (s->depth - 8));
s->thres_y = s->threshold_y * (1 << (s->depth - 8));
s->thres_u = s->threshold_u * (1 << (s->depth - 8));
@ -213,7 +229,6 @@ static int config_input(AVFilterLink *inlink)
s->nb_planes = desc->nb_components;
s->depth = desc->comp[0].depth;
s->filter_slice = s->depth <= 8 ? filter_slice8 : filter_slice16;
s->chroma_w = 1 << desc->log2_chroma_w;
s->chroma_h = 1 << desc->log2_chroma_h;
s->planeheight[1] = s->planeheight[2] = AV_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h);
@ -231,14 +246,17 @@ static int config_input(AVFilterLink *inlink)
#define VF AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_RUNTIME_PARAM
static const AVOption chromanr_options[] = {
{ "thres", "set y+u+v threshold", OFFSET(threshold), AV_OPT_TYPE_FLOAT, {.dbl=30}, 1, 200, VF },
{ "thres", "set y+u+v threshold", OFFSET(threshold), AV_OPT_TYPE_FLOAT, {.dbl=30}, 1, 5000, VF },
{ "sizew", "set horizontal size", OFFSET(sizew), AV_OPT_TYPE_INT, {.i64=5}, 1, 100, VF },
{ "sizeh", "set vertical size", OFFSET(sizeh), AV_OPT_TYPE_INT, {.i64=5}, 1, 100, VF },
{ "stepw", "set horizontal step", OFFSET(stepw), AV_OPT_TYPE_INT, {.i64=1}, 1, 50, VF },
{ "steph", "set vertical step", OFFSET(steph), AV_OPT_TYPE_INT, {.i64=1}, 1, 50, VF },
{ "threy", "set y threshold", OFFSET(threshold_y), AV_OPT_TYPE_FLOAT, {.dbl=200},1, 200, VF },
{ "threu", "set u threshold", OFFSET(threshold_u), AV_OPT_TYPE_FLOAT, {.dbl=200},1, 200, VF },
{ "threv", "set v threshold", OFFSET(threshold_v), AV_OPT_TYPE_FLOAT, {.dbl=200},1, 200, VF },
{ "threy", "set y threshold", OFFSET(threshold_y), AV_OPT_TYPE_FLOAT, {.dbl=5000},1, 5000, VF },
{ "threu", "set u threshold", OFFSET(threshold_u), AV_OPT_TYPE_FLOAT, {.dbl=5000},1, 5000, VF },
{ "threv", "set v threshold", OFFSET(threshold_v), AV_OPT_TYPE_FLOAT, {.dbl=5000},1, 5000, VF },
{ "distance", "set distance type", OFFSET(distance), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, VF, "distance" },
{ "manhattan", "", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, VF, "distance" },
{ "euclidean", "", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, VF, "distance" },
{ NULL }
};