*/
/**
+ * @see http://blog.pkh.me/p/22-understanding-selective-coloring-in-adobe-photoshop.html
* @todo
* - use integers so it can be made bitexact and a FATE test can be added
*/
#include "libavutil/intreadwrite.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
+#include "libavcodec/mathops.h" // for mid_pred(), which is a macro so no link dependency
#include "avfilter.h"
#include "drawutils.h"
#include "formats.h"
"red", "yellow", "green", "cyan", "blue", "magenta", "white", "neutral", "black"
};
-typedef int (*get_adjust_range_func)(int r, int g, int b, int min_val, int max_val);
+typedef int (*get_range_scale_func)(int r, int g, int b, int min_val, int max_val);
struct process_range {
int range_id;
uint32_t mask;
- get_adjust_range_func get_adjust_range;
+ get_range_scale_func get_scale;
};
typedef struct ThreadData {
AVFILTER_DEFINE_CLASS(selectivecolor);
-static inline int get_mid_val(int r, int g, int b)
+static int get_rgb_scale(int r, int g, int b, int min_val, int max_val)
{
- if ((r < g && r > b) || (r < b && r > g)) return r;
- if ((g < r && g > b) || (g < b && g > r)) return g;
- if ((b < r && b > g) || (b < g && b > r)) return b;
- return -1;
+ return max_val - mid_pred(r, g, b);
}
-static int get_rgb_adjust_range(int r, int g, int b, int min_val, int max_val)
+static int get_cmy_scale(int r, int g, int b, int min_val, int max_val)
{
- // max - mid
- const int mid_val = get_mid_val(r, g, b);
- if (mid_val == -1) {
- // XXX: can be simplified
- if ((r != min_val && g == min_val && b == min_val) ||
- (r == min_val && g != min_val && b == min_val) ||
- (r == min_val && g == min_val && b != min_val))
- return max_val - min_val;
- return 0;
- }
- return max_val - mid_val;
-}
-
-static int get_cmy_adjust_range(int r, int g, int b, int min_val, int max_val)
-{
- // mid - min
- const int mid_val = get_mid_val(r, g, b);
- if (mid_val == -1) {
- // XXX: refactor with rgb
- if ((r != max_val && g == max_val && b == max_val) ||
- (r == max_val && g != max_val && b == max_val) ||
- (r == max_val && g == max_val && b != max_val))
- return max_val - min_val;
- return 0;
- }
- return mid_val - min_val;
+ return mid_pred(r, g, b) - min_val;
}
-#define DECLARE_ADJUST_RANGE_FUNCS(nbits) \
-static int get_neutrals_adjust_range##nbits(int r, int g, int b, int min_val, int max_val) \
+#define DECLARE_RANGE_SCALE_FUNCS(nbits) \
+static int get_neutrals_scale##nbits(int r, int g, int b, int min_val, int max_val) \
{ \
/* 1 - (|max-0.5| + |min-0.5|) */ \
return (((1<<nbits)-1)*2 - ( abs((max_val<<1) - ((1<<nbits)-1)) \
+ abs((min_val<<1) - ((1<<nbits)-1))) + 1) >> 1; \
} \
\
-static int get_whites_adjust_range##nbits(int r, int g, int b, int min_val, int max_val) \
+static int get_whites_scale##nbits(int r, int g, int b, int min_val, int max_val) \
{ \
/* (min - 0.5) * 2 */ \
return (min_val<<1) - ((1<<nbits)-1); \
} \
\
-static int get_blacks_adjust_range##nbits(int r, int g, int b, int min_val, int max_val) \
+static int get_blacks_scale##nbits(int r, int g, int b, int min_val, int max_val) \
{ \
/* (0.5 - max) * 2 */ \
return ((1<<nbits)-1) - (max_val<<1); \
} \
-DECLARE_ADJUST_RANGE_FUNCS(8)
-DECLARE_ADJUST_RANGE_FUNCS(16)
+DECLARE_RANGE_SCALE_FUNCS(8)
+DECLARE_RANGE_SCALE_FUNCS(16)
static int register_range(SelectiveColorContext *s, int range_id)
{
pr->range_id = range_id;
pr->mask = 1 << range_id;
- if (pr->mask & (1<<RANGE_REDS | 1<<RANGE_GREENS | 1<<RANGE_BLUES)) pr->get_adjust_range = get_rgb_adjust_range;
- else if (pr->mask & (1<<RANGE_CYANS | 1<<RANGE_MAGENTAS | 1<<RANGE_YELLOWS)) pr->get_adjust_range = get_cmy_adjust_range;
- else if (!s->is_16bit && (pr->mask & 1<<RANGE_WHITES)) pr->get_adjust_range = get_whites_adjust_range8;
- else if (!s->is_16bit && (pr->mask & 1<<RANGE_NEUTRALS)) pr->get_adjust_range = get_neutrals_adjust_range8;
- else if (!s->is_16bit && (pr->mask & 1<<RANGE_BLACKS)) pr->get_adjust_range = get_blacks_adjust_range8;
- else if ( s->is_16bit && (pr->mask & 1<<RANGE_WHITES)) pr->get_adjust_range = get_whites_adjust_range16;
- else if ( s->is_16bit && (pr->mask & 1<<RANGE_NEUTRALS)) pr->get_adjust_range = get_neutrals_adjust_range16;
- else if ( s->is_16bit && (pr->mask & 1<<RANGE_BLACKS)) pr->get_adjust_range = get_blacks_adjust_range16;
+ if (pr->mask & (1<<RANGE_REDS | 1<<RANGE_GREENS | 1<<RANGE_BLUES)) pr->get_scale = get_rgb_scale;
+ else if (pr->mask & (1<<RANGE_CYANS | 1<<RANGE_MAGENTAS | 1<<RANGE_YELLOWS)) pr->get_scale = get_cmy_scale;
+ else if (!s->is_16bit && (pr->mask & 1<<RANGE_WHITES)) pr->get_scale = get_whites_scale8;
+ else if (!s->is_16bit && (pr->mask & 1<<RANGE_NEUTRALS)) pr->get_scale = get_neutrals_scale8;
+ else if (!s->is_16bit && (pr->mask & 1<<RANGE_BLACKS)) pr->get_scale = get_blacks_scale8;
+ else if ( s->is_16bit && (pr->mask & 1<<RANGE_WHITES)) pr->get_scale = get_whites_scale16;
+ else if ( s->is_16bit && (pr->mask & 1<<RANGE_NEUTRALS)) pr->get_scale = get_neutrals_scale16;
+ else if ( s->is_16bit && (pr->mask & 1<<RANGE_BLACKS)) pr->get_scale = get_blacks_scale16;
else
av_assert0(0);
}
return ff_set_common_formats(ctx, fmts_list);
}
-static inline int comp_adjust(int adjust_range, float value, float adjust, float k, int correction_method)
+static inline int comp_adjust(int scale, float value, float adjust, float k, int correction_method)
{
const float min = -value;
const float max = 1. - value;
float res = (-1. - adjust) * k - adjust;
if (correction_method == CORRECTION_METHOD_RELATIVE)
res *= max;
- return lrint(av_clipf(res, min, max) * adjust_range);
+ return lrint(av_clipf(res, min, max) * scale);
}
#define DECLARE_SELECTIVE_COLOR_FUNC(nbits) \
const struct process_range *pr = &s->process_ranges[i]; \
\
if (range_flag & pr->mask) { \
- const int adjust_range = pr->get_adjust_range(r, g, b, min_color, max_color); \
+ const int scale = pr->get_scale(r, g, b, min_color, max_color); \
\
- if (adjust_range > 0) { \
+ if (scale > 0) { \
const float *cmyk_adjust = s->cmyk_adjust[pr->range_id]; \
const float adj_c = cmyk_adjust[0]; \
const float adj_m = cmyk_adjust[1]; \
const float adj_y = cmyk_adjust[2]; \
const float k = cmyk_adjust[3]; \
\
- adjust_r += comp_adjust(adjust_range, rnorm, adj_c, k, correction_method); \
- adjust_g += comp_adjust(adjust_range, gnorm, adj_m, k, correction_method); \
- adjust_b += comp_adjust(adjust_range, bnorm, adj_y, k, correction_method); \
+ adjust_r += comp_adjust(scale, rnorm, adj_c, k, correction_method); \
+ adjust_g += comp_adjust(scale, gnorm, adj_m, k, correction_method); \
+ adjust_b += comp_adjust(scale, bnorm, adj_y, k, correction_method); \
} \
} \
} \
projects / ffmpeg / blobdiff