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-rw-r--r--libavfilter/vf_drawbox.c96
1 files changed, 69 insertions, 27 deletions
diff --git a/libavfilter/vf_drawbox.c b/libavfilter/vf_drawbox.c
index c47422ef1b..af8eca4d52 100644
--- a/libavfilter/vf_drawbox.c
+++ b/libavfilter/vf_drawbox.c
@@ -1,20 +1,20 @@
/*
* Copyright (c) 2008 Affine Systems, Inc (Michael Sullivan, Bobby Impollonia)
*
- * This file is part of Libav.
+ * This file is part of FFmpeg.
*
- * Libav is free software; you can redistribute it and/or
+ * FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
- * Libav is distributed in the hope that it will be useful,
+ * FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
- * License along with Libav; if not, write to the Free Software
+ * License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
@@ -26,6 +26,7 @@
#include "libavutil/colorspace.h"
#include "libavutil/common.h"
+#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "libavutil/parseutils.h"
#include "avfilter.h"
@@ -36,37 +37,70 @@
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[] = {
+ static const enum AVPixelFormat pix_fmts[] = {
AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV420P,
AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P,
AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ420P,
@@ -90,7 +124,7 @@ static int config_input(AVFilterLink *inlink)
if (drawbox->h == 0) drawbox->h = 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->x, drawbox->y, drawbox->w, drawbox->h,
drawbox->yuv_color[Y], drawbox->yuv_color[U], drawbox->yuv_color[V], drawbox->yuv_color[A]);
return 0;
@@ -109,14 +143,21 @@ static int filter_frame(AVFilterLink *inlink, AVFilterBufferRef *frame)
row[plane] = frame->data[plane] +
frame->linesize[plane] * (y >> drawbox->vsub);
- 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 < 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 (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];
+ }
}
}
}
@@ -132,7 +173,6 @@ static const AVFilterPad avfilter_vf_drawbox_inputs[] = {
.get_video_buffer = ff_null_get_video_buffer,
.filter_frame = filter_frame,
.min_perms = AV_PERM_WRITE | AV_PERM_READ,
- .rej_perms = AV_PERM_PRESERVE
},
{ NULL }
};
@@ -150,8 +190,10 @@ AVFilter avfilter_vf_drawbox = {
.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,
};
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-09 08:32:05 +0000