#include "libavutil/colorspace.h"
#include "libavutil/common.h"
+#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "libavutil/parseutils.h"
#include "avfilter.h"
enum { Y, U, V, A };
typedef struct {
- int x, y, w, h;
+ const AVClass *class;
+ int x, y, w, h, thickness;
+ char *color_str;
unsigned char yuv_color[4];
+ int invert_color; ///< invert luma color
int vsub, hsub; ///< chroma subsampling
} DrawBoxContext;
+#define OFFSET(x) offsetof(DrawBoxContext, x)
+#define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
+
+static const AVOption drawbox_options[] = {
+ { "x", "set the box top-left corner x position", OFFSET(x), AV_OPT_TYPE_INT, {.i64=0}, INT_MIN, INT_MAX, FLAGS },
+ { "y", "set the box top-left corner y position", OFFSET(y), AV_OPT_TYPE_INT, {.i64=0}, INT_MIN, INT_MAX, FLAGS },
+ { "width", "set the box width", OFFSET(w), AV_OPT_TYPE_INT, {.i64=0}, 0, INT_MAX, FLAGS },
+ { "w", "set the box width", OFFSET(w), AV_OPT_TYPE_INT, {.i64=0}, 0, INT_MAX, FLAGS },
+ { "height", "set the box height", OFFSET(h), AV_OPT_TYPE_INT, {.i64=0}, 0, INT_MAX, FLAGS },
+ { "h", "set the box height", OFFSET(h), AV_OPT_TYPE_INT, {.i64=0}, 0, INT_MAX, FLAGS },
+ { "color", "set the box edge color", OFFSET(color_str), AV_OPT_TYPE_STRING, {.str="black"}, CHAR_MIN, CHAR_MAX, FLAGS },
+ { "c", "set the box edge color", OFFSET(color_str), AV_OPT_TYPE_STRING, {.str="black"}, CHAR_MIN, CHAR_MAX, FLAGS },
+ { "thickness", "set the box maximum thickness", OFFSET(thickness), AV_OPT_TYPE_INT, {.i64=4}, 0, INT_MAX, FLAGS },
+ { "t", "set the box maximum thickness", OFFSET(thickness), AV_OPT_TYPE_INT, {.i64=4}, 0, INT_MAX, FLAGS },
+ {NULL},
+};
+
+AVFILTER_DEFINE_CLASS(drawbox);
+
static av_cold int init(AVFilterContext *ctx, const char *args)
{
- DrawBoxContext *drawbox= ctx->priv;
- char color_str[1024] = "black";
+ DrawBoxContext *drawbox = ctx->priv;
uint8_t rgba_color[4];
+ static const char *shorthand[] = { "x", "y", "w", "h", "color", "thickness", NULL };
+ int ret;
- drawbox->x = drawbox->y = drawbox->w = drawbox->h = 0;
+ drawbox->class = &drawbox_class;
+ av_opt_set_defaults(drawbox);
- if (args)
- sscanf(args, "%d:%d:%d:%d:%s",
- &drawbox->x, &drawbox->y, &drawbox->w, &drawbox->h, color_str);
+ if ((ret = av_opt_set_from_string(drawbox, args, shorthand, "=", ":")) < 0)
+ return ret;
- if (av_parse_color(rgba_color, 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]);
- drawbox->yuv_color[U] = RGB_TO_U_CCIR(rgba_color[0], rgba_color[1], rgba_color[2], 0);
- drawbox->yuv_color[V] = RGB_TO_V_CCIR(rgba_color[0], rgba_color[1], rgba_color[2], 0);
- drawbox->yuv_color[A] = rgba_color[3];
+ if (!drawbox->invert_color) {
+ drawbox->yuv_color[Y] = RGB_TO_Y_CCIR(rgba_color[0], rgba_color[1], rgba_color[2]);
+ drawbox->yuv_color[U] = RGB_TO_U_CCIR(rgba_color[0], rgba_color[1], rgba_color[2], 0);
+ drawbox->yuv_color[V] = RGB_TO_V_CCIR(rgba_color[0], rgba_color[1], rgba_color[2], 0);
+ drawbox->yuv_color[A] = rgba_color[3];
+ }
return 0;
}
+static av_cold void uninit(AVFilterContext *ctx)
+{
+ DrawBoxContext *drawbox = ctx->priv;
+ av_opt_free(drawbox);
+}
+
static int query_formats(AVFilterContext *ctx)
{
enum AVPixelFormat pix_fmts[] = {
return 0;
}
-static int draw_slice(AVFilterLink *inlink, int y0, int h, int slice_dir)
+static int filter_frame(AVFilterLink *inlink, AVFilterBufferRef *frame)
{
DrawBoxContext *drawbox = inlink->dst->priv;
int plane, x, y, xb = drawbox->x, yb = drawbox->y;
unsigned char *row[4];
- AVFilterBufferRef *picref = inlink->cur_buf;
- for (y = FFMAX(yb, y0); y < (y0 + h) && y < (yb + drawbox->h); y++) {
- row[0] = picref->data[0] + y * picref->linesize[0];
+ for (y = FFMAX(yb, 0); y < frame->video->h && y < (yb + drawbox->h); y++) {
+ row[0] = frame->data[0] + y * frame->linesize[0];
for (plane = 1; plane < 3; plane++)
- row[plane] = picref->data[plane] +
- picref->linesize[plane] * (y >> drawbox->vsub);
-
- for (x = FFMAX(xb, 0); x < (xb + drawbox->w) && x < picref->video->w; x++) {
- double alpha = (double)drawbox->yuv_color[A] / 255;
-
- if ((y - yb < 3) || (yb + drawbox->h - y < 4) ||
- (x - xb < 3) || (xb + drawbox->w - x < 4)) {
- row[0][x ] = (1 - alpha) * row[0][x ] + alpha * drawbox->yuv_color[Y];
- row[1][x >> drawbox->hsub] = (1 - alpha) * row[1][x >> drawbox->hsub] + alpha * drawbox->yuv_color[U];
- row[2][x >> drawbox->hsub] = (1 - alpha) * row[2][x >> drawbox->hsub] + alpha * drawbox->yuv_color[V];
+ row[plane] = frame->data[plane] +
+ frame->linesize[plane] * (y >> drawbox->vsub);
+
+ if (drawbox->invert_color) {
+ for (x = FFMAX(xb, 0); x < xb + drawbox->w && x < frame->video->w; x++)
+ if ((y - yb < drawbox->thickness-1) || (yb + drawbox->h - y < drawbox->thickness) ||
+ (x - xb < drawbox->thickness-1) || (xb + drawbox->w - x < drawbox->thickness))
+ row[0][x] = 0xff - row[0][x];
+ } else {
+ for (x = FFMAX(xb, 0); x < xb + drawbox->w && x < frame->video->w; x++) {
+ double alpha = (double)drawbox->yuv_color[A] / 255;
+
+ if ((y - yb < drawbox->thickness-1) || (yb + drawbox->h - y < drawbox->thickness) ||
+ (x - xb < drawbox->thickness-1) || (xb + drawbox->w - x < drawbox->thickness)) {
+ row[0][x ] = (1 - alpha) * row[0][x ] + alpha * drawbox->yuv_color[Y];
+ row[1][x >> drawbox->hsub] = (1 - alpha) * row[1][x >> drawbox->hsub] + alpha * drawbox->yuv_color[U];
+ 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);
+ return ff_filter_frame(inlink->dst->outputs[0], frame);
}
static const AVFilterPad avfilter_vf_drawbox_inputs[] = {
.type = AVMEDIA_TYPE_VIDEO,
.config_props = config_input,
.get_video_buffer = ff_null_get_video_buffer,
- .start_frame = ff_null_start_frame,
- .draw_slice = draw_slice,
- .end_frame = ff_null_end_frame,
+ .filter_frame = filter_frame,
.min_perms = AV_PERM_WRITE | AV_PERM_READ,
},
{ NULL }
.description = NULL_IF_CONFIG_SMALL("Draw a colored box on the input video."),
.priv_size = sizeof(DrawBoxContext),
.init = init,
+ .uninit = uninit,
.query_formats = query_formats,
.inputs = avfilter_vf_drawbox_inputs,
.outputs = avfilter_vf_drawbox_outputs,
+ .priv_class = &drawbox_class,
};
projects / ffmpeg / blobdiff