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lavfi/drawbox: add thickness option

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This commit is contained in:
Stefano Sabatini 2012-10-30 20:40:19 +01:00
parent 84833b028b
commit 93399e9381
3 changed files with 19 additions and 8 deletions
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11
doc/filters.texi
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@ -1744,12 +1744,15 @@ Specify the color of the box to write, it can be the name of a color
(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.
@item thickness, t
Set the thickness of the box edge. Default value is @code{4}.
@end table
If the key of the first options is omitted, the arguments are
interpreted according to the following syntax:
@example
drawbox=@var{x}:@var{y}:@var{width}:@var{height}:@var{color}
drawbox=@var{x}:@var{y}:@var{width}:@var{height}:@var{color}:@var{thickness}
@end example
Some examples follow:
@ -1770,6 +1773,12 @@ The previous example can be specified as:
@example
drawbox=x=10:y=20:w=200:h=60:color=red@@0.5
@end example
@item
Fill the box with pink color:
@example
drawbox=x=10:y=10:w=100:h=100:color=pink@@0.5:t=max
@end example
@end itemize
@section drawtext

2
libavfilter/version.h
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@ -30,7 +30,7 @@
#define LIBAVFILTER_VERSION_MAJOR 3
#define LIBAVFILTER_VERSION_MINOR 21
#define LIBAVFILTER_VERSION_MICRO 102
#define LIBAVFILTER_VERSION_MICRO 103
#define LIBAVFILTER_VERSION_INT AV_VERSION_INT(LIBAVFILTER_VERSION_MAJOR, \
LIBAVFILTER_VERSION_MINOR, \

14
libavfilter/vf_drawbox.c
View File

@ -38,7 +38,7 @@ enum { Y, U, V, A };
typedef struct {
const AVClass *class;
int x, y, w, h;
int x, y, w, h, thickness;
char *color_str;
unsigned char yuv_color[4];
int invert_color; ///< invert luma color
@ -55,6 +55,8 @@ static const AVOption drawbox_options[] = {
{ "h", "set the box heigth", 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},
};
@ -64,7 +66,7 @@ static av_cold int init(AVFilterContext *ctx, const char *args)
{
DrawBoxContext *drawbox = ctx->priv;
uint8_t rgba_color[4];
static const char *shorthand[] = { "x", "y", "w", "h", "color", NULL };
static const char *shorthand[] = { "x", "y", "w", "h", "color", "thickness", NULL };
int ret;
drawbox->class = &drawbox_class;
@ -140,15 +142,15 @@ static int draw_slice(AVFilterLink *inlink, int y0, int h, int slice_dir)
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))
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 < 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)) {
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];