From 1b3fdd9731012a4ae2d5b3ee5460c910d808da8e Mon Sep 17 00:00:00 2001 From: Stefano Sabatini Date: Tue, 30 Oct 2012 20:14:07 +0100 Subject: lavfi/drawbox: implement color=invert mode Based on a libmpcodecs/vf_rectangle.c feature. --- libavfilter/vf_drawbox.c | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) (limited to 'libavfilter/vf_drawbox.c') diff --git a/libavfilter/vf_drawbox.c b/libavfilter/vf_drawbox.c index a93620f..ef1bc32 100644 --- a/libavfilter/vf_drawbox.c +++ b/libavfilter/vf_drawbox.c @@ -41,6 +41,7 @@ typedef struct { 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; @@ -72,7 +73,9 @@ static av_cold int init(AVFilterContext *ctx, const char *args) 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]); @@ -135,6 +138,12 @@ static int draw_slice(AVFilterLink *inlink, int y0, int h, int slice_dir) 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; @@ -145,6 +154,7 @@ static int draw_slice(AVFilterLink *inlink, int y0, int h, int slice_dir) 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); -- cgit v1.1