enum { Y, U, V, A };
-typedef struct {
+typedef struct DrawBoxContext {
const AVClass *class;
- int x, y, w, h;
+ int x, y, w_opt, h_opt, w, h;
char *color_str;
unsigned char yuv_color[4];
int vsub, hsub; ///< chroma subsampling
static av_cold int init(AVFilterContext *ctx)
{
- DrawBoxContext *drawbox= ctx->priv;
+ DrawBoxContext *s = ctx->priv;
uint8_t rgba_color[4];
- if (av_parse_color(rgba_color, drawbox->color_str, -1, ctx) < 0)
+ if (av_parse_color(rgba_color, s->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];
+ s->yuv_color[Y] = RGB_TO_Y_CCIR(rgba_color[0], rgba_color[1], rgba_color[2]);
+ s->yuv_color[U] = RGB_TO_U_CCIR(rgba_color[0], rgba_color[1], rgba_color[2], 0);
+ s->yuv_color[V] = RGB_TO_V_CCIR(rgba_color[0], rgba_color[1], rgba_color[2], 0);
+ s->yuv_color[A] = rgba_color[3];
return 0;
}
static int config_input(AVFilterLink *inlink)
{
- DrawBoxContext *drawbox = inlink->dst->priv;
+ DrawBoxContext *s = inlink->dst->priv;
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
- drawbox->hsub = desc->log2_chroma_w;
- drawbox->vsub = desc->log2_chroma_h;
+ s->hsub = desc->log2_chroma_w;
+ s->vsub = desc->log2_chroma_h;
- if (drawbox->w == 0) drawbox->w = inlink->w;
- if (drawbox->h == 0) drawbox->h = inlink->h;
+ s->w = (s->w_opt > 0) ? s->w_opt : inlink->w;
+ s->h = (s->h_opt > 0) ? s->h_opt : inlink->h;
av_log(inlink->dst, AV_LOG_VERBOSE, "x:%d y:%d w:%d h:%d color:0x%02X%02X%02X%02X\n",
- drawbox->w, drawbox->y, drawbox->w, drawbox->h,
- drawbox->yuv_color[Y], drawbox->yuv_color[U], drawbox->yuv_color[V], drawbox->yuv_color[A]);
+ s->w, s->y, s->w, s->h,
+ s->yuv_color[Y], s->yuv_color[U], s->yuv_color[V], s->yuv_color[A]);
return 0;
}
static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
{
- DrawBoxContext *drawbox = inlink->dst->priv;
- int plane, x, y, xb = drawbox->x, yb = drawbox->y;
+ DrawBoxContext *s = inlink->dst->priv;
+ int plane, x, y, xb = s->x, yb = s->y;
unsigned char *row[4];
- for (y = FFMAX(yb, 0); y < frame->height && y < (yb + drawbox->h); y++) {
+ for (y = FFMAX(yb, 0); y < frame->height && y < (yb + s->h); y++) {
row[0] = frame->data[0] + y * frame->linesize[0];
for (plane = 1; plane < 3; plane++)
row[plane] = frame->data[plane] +
- frame->linesize[plane] * (y >> drawbox->vsub);
+ frame->linesize[plane] * (y >> s->vsub);
- for (x = FFMAX(xb, 0); x < (xb + drawbox->w) && x < frame->width; x++) {
- double alpha = (double)drawbox->yuv_color[A] / 255;
+ for (x = FFMAX(xb, 0); x < (xb + s->w) && x < frame->width; x++) {
+ double alpha = (double)s->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];
+ if ((y - yb < 3) || (yb + s->h - y < 4) ||
+ (x - xb < 3) || (xb + s->w - x < 4)) {
+ row[0][x ] = (1 - alpha) * row[0][x ] + alpha * s->yuv_color[Y];
+ row[1][x >> s->hsub] = (1 - alpha) * row[1][x >> s->hsub] + alpha * s->yuv_color[U];
+ row[2][x >> s->hsub] = (1 - alpha) * row[2][x >> s->hsub] + alpha * s->yuv_color[V];
}
}
}
static const AVOption options[] = {
{ "x", "Horizontal position of the left box edge", OFFSET(x), AV_OPT_TYPE_INT, { .i64 = 0 }, INT_MIN, INT_MAX, FLAGS },
{ "y", "Vertical position of the top box edge", OFFSET(y), AV_OPT_TYPE_INT, { .i64 = 0 }, INT_MIN, INT_MAX, FLAGS },
- { "width", "Width of the box", OFFSET(w), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, FLAGS },
- { "height", "Height of the box", OFFSET(h), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, FLAGS },
+ { "width", "Width of the box", OFFSET(w_opt), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, FLAGS },
+ { "height", "Height of the box", OFFSET(h_opt), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, FLAGS },
{ "color", "Color of the box", OFFSET(color_str), AV_OPT_TYPE_STRING, { .str = "black" }, .flags = FLAGS },
{ NULL },
};
{ NULL }
};
-AVFilter avfilter_vf_drawbox = {
+AVFilter ff_vf_drawbox = {
.name = "drawbox",
.description = NULL_IF_CONFIG_SMALL("Draw a colored box on the input video."),
.priv_size = sizeof(DrawBoxContext),