h264_metadata: Add option to delete filler data
[libav.git] / libavfilter / vf_drawbox.c
1 /*
2 * Copyright (c) 2008 Affine Systems, Inc (Michael Sullivan, Bobby Impollonia)
3 *
4 * This file is part of Libav.
5 *
6 * Libav is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * Libav is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with Libav; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21 /**
22 * @file
23 * Box drawing filter. Also a nice template for a filter that needs to
24 * write in the input frame.
25 */
26
27 #include "libavutil/colorspace.h"
28 #include "libavutil/common.h"
29 #include "libavutil/opt.h"
30 #include "libavutil/pixdesc.h"
31 #include "libavutil/parseutils.h"
32 #include "avfilter.h"
33 #include "formats.h"
34 #include "internal.h"
35 #include "video.h"
36
37 enum { Y, U, V, A };
38
39 typedef struct DrawBoxContext {
40 const AVClass *class;
41 int x, y, w_opt, h_opt, w, h;
42 char *color_str;
43 unsigned char yuv_color[4];
44 int vsub, hsub; ///< chroma subsampling
45 } DrawBoxContext;
46
47 static av_cold int init(AVFilterContext *ctx)
48 {
49 DrawBoxContext *s = ctx->priv;
50 uint8_t rgba_color[4];
51
52 if (av_parse_color(rgba_color, s->color_str, -1, ctx) < 0)
53 return AVERROR(EINVAL);
54
55 s->yuv_color[Y] = RGB_TO_Y_CCIR(rgba_color[0], rgba_color[1], rgba_color[2]);
56 s->yuv_color[U] = RGB_TO_U_CCIR(rgba_color[0], rgba_color[1], rgba_color[2], 0);
57 s->yuv_color[V] = RGB_TO_V_CCIR(rgba_color[0], rgba_color[1], rgba_color[2], 0);
58 s->yuv_color[A] = rgba_color[3];
59
60 return 0;
61 }
62
63 static int query_formats(AVFilterContext *ctx)
64 {
65 enum AVPixelFormat pix_fmts[] = {
66 AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV420P,
67 AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P,
68 AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ420P,
69 AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUVJ440P,
70 AV_PIX_FMT_NONE
71 };
72
73 ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
74 return 0;
75 }
76
77 static int config_input(AVFilterLink *inlink)
78 {
79 DrawBoxContext *s = inlink->dst->priv;
80 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
81
82 s->hsub = desc->log2_chroma_w;
83 s->vsub = desc->log2_chroma_h;
84
85 s->w = (s->w_opt > 0) ? s->w_opt : inlink->w;
86 s->h = (s->h_opt > 0) ? s->h_opt : inlink->h;
87
88 av_log(inlink->dst, AV_LOG_VERBOSE, "x:%d y:%d w:%d h:%d color:0x%02X%02X%02X%02X\n",
89 s->w, s->y, s->w, s->h,
90 s->yuv_color[Y], s->yuv_color[U], s->yuv_color[V], s->yuv_color[A]);
91
92 return 0;
93 }
94
95 static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
96 {
97 DrawBoxContext *s = inlink->dst->priv;
98 int plane, x, y, xb = s->x, yb = s->y;
99 unsigned char *row[4];
100
101 for (y = FFMAX(yb, 0); y < frame->height && y < (yb + s->h); y++) {
102 row[0] = frame->data[0] + y * frame->linesize[0];
103
104 for (plane = 1; plane < 3; plane++)
105 row[plane] = frame->data[plane] +
106 frame->linesize[plane] * (y >> s->vsub);
107
108 for (x = FFMAX(xb, 0); x < (xb + s->w) && x < frame->width; x++) {
109 double alpha = (double)s->yuv_color[A] / 255;
110
111 if ((y - yb < 3) || (yb + s->h - y < 4) ||
112 (x - xb < 3) || (xb + s->w - x < 4)) {
113 row[0][x ] = (1 - alpha) * row[0][x ] + alpha * s->yuv_color[Y];
114 row[1][x >> s->hsub] = (1 - alpha) * row[1][x >> s->hsub] + alpha * s->yuv_color[U];
115 row[2][x >> s->hsub] = (1 - alpha) * row[2][x >> s->hsub] + alpha * s->yuv_color[V];
116 }
117 }
118 }
119
120 return ff_filter_frame(inlink->dst->outputs[0], frame);
121 }
122
123 #define OFFSET(x) offsetof(DrawBoxContext, x)
124 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM
125 static const AVOption options[] = {
126 { "x", "Horizontal position of the left box edge", OFFSET(x), AV_OPT_TYPE_INT, { .i64 = 0 }, INT_MIN, INT_MAX, FLAGS },
127 { "y", "Vertical position of the top box edge", OFFSET(y), AV_OPT_TYPE_INT, { .i64 = 0 }, INT_MIN, INT_MAX, FLAGS },
128 { "width", "Width of the box", OFFSET(w_opt), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, FLAGS },
129 { "height", "Height of the box", OFFSET(h_opt), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, FLAGS },
130 { "color", "Color of the box", OFFSET(color_str), AV_OPT_TYPE_STRING, { .str = "black" }, .flags = FLAGS },
131 { NULL },
132 };
133
134 static const AVClass drawbox_class = {
135 .class_name = "drawbox",
136 .item_name = av_default_item_name,
137 .option = options,
138 .version = LIBAVUTIL_VERSION_INT,
139 };
140
141 static const AVFilterPad avfilter_vf_drawbox_inputs[] = {
142 {
143 .name = "default",
144 .type = AVMEDIA_TYPE_VIDEO,
145 .config_props = config_input,
146 .get_video_buffer = ff_null_get_video_buffer,
147 .filter_frame = filter_frame,
148 .needs_writable = 1,
149 },
150 { NULL }
151 };
152
153 static const AVFilterPad avfilter_vf_drawbox_outputs[] = {
154 {
155 .name = "default",
156 .type = AVMEDIA_TYPE_VIDEO,
157 },
158 { NULL }
159 };
160
161 AVFilter ff_vf_drawbox = {
162 .name = "drawbox",
163 .description = NULL_IF_CONFIG_SMALL("Draw a colored box on the input video."),
164 .priv_size = sizeof(DrawBoxContext),
165 .priv_class = &drawbox_class,
166 .init = init,
167
168 .query_formats = query_formats,
169 .inputs = avfilter_vf_drawbox_inputs,
170 .outputs = avfilter_vf_drawbox_outputs,
171 };