@item color, c
Specify the color of the box to write, it can be the name of a color
-(case insensitive match) or a 0xRRGGBB[AA] sequence.
+(case insensitive match) or a 0xRRGGBB[AA] sequence. If the special
+value @code{invert} is used, the box edge color is the same as the
+video with inverted luma.
@end table
If the key of the first options is omitted, the arguments are
#define LIBAVFILTER_VERSION_MAJOR 3
#define LIBAVFILTER_VERSION_MINOR 21
-#define LIBAVFILTER_VERSION_MICRO 101
+#define LIBAVFILTER_VERSION_MICRO 102
#define LIBAVFILTER_VERSION_INT AV_VERSION_INT(LIBAVFILTER_VERSION_MAJOR, \
LIBAVFILTER_VERSION_MINOR, \
int x, y, w, h;
char *color_str;
unsigned char yuv_color[4];
+ int invert_color; ///< invert luma color
int vsub, hsub; ///< chroma subsampling
} DrawBoxContext;
if ((ret = av_opt_set_from_string(drawbox, args, shorthand, "=", ":")) < 0)
return ret;
- if (av_parse_color(rgba_color, drawbox->color_str, -1, ctx) < 0)
+ if (!strcmp(drawbox->color_str, "invert"))
+ drawbox->invert_color = 1;
+ else if (av_parse_color(rgba_color, drawbox->color_str, -1, ctx) < 0)
return AVERROR(EINVAL);
drawbox->yuv_color[Y] = RGB_TO_Y_CCIR(rgba_color[0], rgba_color[1], rgba_color[2]);
row[plane] = picref->data[plane] +
picref->linesize[plane] * (y >> drawbox->vsub);
+ if (drawbox->invert_color) {
+ for (x = FFMAX(xb, 0); x < (xb + drawbox->w) && x < picref->video->w; x++)
+ if ((y - yb < 3) || (yb + drawbox->h - y < 4) ||
+ (x - xb < 3) || (xb + drawbox->w - x < 4))
+ row[0][x] = 0xff - row[0][x];
+ } else {
for (x = FFMAX(xb, 0); x < (xb + drawbox->w) && x < picref->video->w; x++) {
double alpha = (double)drawbox->yuv_color[A] / 255;
row[2][x >> drawbox->hsub] = (1 - alpha) * row[2][x >> drawbox->hsub] + alpha * drawbox->yuv_color[V];
}
}
+ }
}
return ff_draw_slice(inlink->dst->outputs[0], y0, h, 1);