h264_metadata: Add option to delete filler data
[libav.git] / libavfilter / vsrc_color.c
1 /*
2 * Copyright (c) 2010 Stefano Sabatini
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 * color source
24 */
25
26 #include <stdio.h>
27 #include <string.h>
28
29 #include "avfilter.h"
30 #include "formats.h"
31 #include "internal.h"
32 #include "video.h"
33 #include "libavutil/pixdesc.h"
34 #include "libavutil/colorspace.h"
35 #include "libavutil/imgutils.h"
36 #include "libavutil/internal.h"
37 #include "libavutil/mathematics.h"
38 #include "libavutil/mem.h"
39 #include "libavutil/opt.h"
40 #include "libavutil/parseutils.h"
41 #include "drawutils.h"
42
43 typedef struct ColorContext {
44 const AVClass *class;
45 int w, h;
46 uint8_t color[4];
47 AVRational frame_rate;
48 uint8_t *line[4];
49 int line_step[4];
50 int hsub, vsub; ///< chroma subsampling values
51 uint64_t pts;
52 char *color_str;
53 char *size_str;
54 char *framerate_str;
55 } ColorContext;
56
57 static av_cold int color_init(AVFilterContext *ctx)
58 {
59 ColorContext *color = ctx->priv;
60 int ret;
61
62 if (av_parse_video_size(&color->w, &color->h, color->size_str) < 0) {
63 av_log(ctx, AV_LOG_ERROR, "Invalid frame size: %s\n", color->size_str);
64 return AVERROR(EINVAL);
65 }
66
67 if (av_parse_video_rate(&color->frame_rate, color->framerate_str) < 0) {
68 av_log(ctx, AV_LOG_ERROR, "Invalid frame rate: %s\n", color->framerate_str);
69 return AVERROR(EINVAL);
70 }
71
72 if ((ret = av_parse_color(color->color, color->color_str, -1, ctx)) < 0)
73 return ret;
74
75 return 0;
76 }
77
78 static av_cold void color_uninit(AVFilterContext *ctx)
79 {
80 ColorContext *color = ctx->priv;
81 int i;
82
83 for (i = 0; i < 4; i++) {
84 av_freep(&color->line[i]);
85 color->line_step[i] = 0;
86 }
87 }
88
89 static int query_formats(AVFilterContext *ctx)
90 {
91 static const enum AVPixelFormat pix_fmts[] = {
92 AV_PIX_FMT_ARGB, AV_PIX_FMT_RGBA,
93 AV_PIX_FMT_ABGR, AV_PIX_FMT_BGRA,
94 AV_PIX_FMT_RGB24, AV_PIX_FMT_BGR24,
95
96 AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV422P,
97 AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV411P,
98 AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV440P,
99 AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ422P,
100 AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ440P,
101 AV_PIX_FMT_YUVA420P,
102
103 AV_PIX_FMT_NONE
104 };
105
106 ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
107 return 0;
108 }
109
110 static int color_config_props(AVFilterLink *inlink)
111 {
112 AVFilterContext *ctx = inlink->src;
113 ColorContext *color = ctx->priv;
114 uint8_t rgba_color[4];
115 int is_packed_rgba;
116 const AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get(inlink->format);
117
118 color->hsub = pix_desc->log2_chroma_w;
119 color->vsub = pix_desc->log2_chroma_h;
120
121 color->w &= ~((1 << color->hsub) - 1);
122 color->h &= ~((1 << color->vsub) - 1);
123 if (av_image_check_size(color->w, color->h, 0, ctx) < 0)
124 return AVERROR(EINVAL);
125
126 memcpy(rgba_color, color->color, sizeof(rgba_color));
127 ff_fill_line_with_color(color->line, color->line_step, color->w, color->color,
128 inlink->format, rgba_color, &is_packed_rgba, NULL);
129
130 av_log(ctx, AV_LOG_VERBOSE, "w:%d h:%d r:%d/%d color:0x%02x%02x%02x%02x[%s]\n",
131 color->w, color->h, color->frame_rate.num, color->frame_rate.den,
132 color->color[0], color->color[1], color->color[2], color->color[3],
133 is_packed_rgba ? "rgba" : "yuva");
134 inlink->w = color->w;
135 inlink->h = color->h;
136 inlink->time_base = av_inv_q(color->frame_rate);
137 inlink->frame_rate = color->frame_rate;
138
139 return 0;
140 }
141
142 static int color_request_frame(AVFilterLink *link)
143 {
144 ColorContext *color = link->src->priv;
145 AVFrame *frame = ff_get_video_buffer(link, color->w, color->h);
146
147 if (!frame)
148 return AVERROR(ENOMEM);
149
150 frame->sample_aspect_ratio = (AVRational) {1, 1};
151 frame->pts = color->pts++;
152
153 ff_draw_rectangle(frame->data, frame->linesize,
154 color->line, color->line_step, color->hsub, color->vsub,
155 0, 0, color->w, color->h);
156 return ff_filter_frame(link, frame);
157 }
158
159 #define OFFSET(x) offsetof(ColorContext, x)
160 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM
161 static const AVOption options[] = {
162 { "color", "Output video color", OFFSET(color_str), AV_OPT_TYPE_STRING, { .str = "black" }, .flags = FLAGS },
163 { "size", "Output video size (wxh or an abbreviation)", OFFSET(size_str), AV_OPT_TYPE_STRING, { .str = "320x240" }, .flags = FLAGS },
164 { "framerate", "Output video framerate", OFFSET(framerate_str), AV_OPT_TYPE_STRING, { .str = "25" }, .flags = FLAGS },
165 { NULL },
166 };
167
168 static const AVClass color_class = {
169 .class_name = "color",
170 .item_name = av_default_item_name,
171 .option = options,
172 .version = LIBAVUTIL_VERSION_INT,
173 };
174
175 static const AVFilterPad avfilter_vsrc_color_outputs[] = {
176 {
177 .name = "default",
178 .type = AVMEDIA_TYPE_VIDEO,
179 .request_frame = color_request_frame,
180 .config_props = color_config_props
181 },
182 { NULL }
183 };
184
185 AVFilter ff_vsrc_color = {
186 .name = "color",
187 .description = NULL_IF_CONFIG_SMALL("Provide an uniformly colored input, syntax is: [color[:size[:rate]]]"),
188
189 .priv_class = &color_class,
190 .priv_size = sizeof(ColorContext),
191 .init = color_init,
192 .uninit = color_uninit,
193
194 .query_formats = query_formats,
195
196 .inputs = NULL,
197
198 .outputs = avfilter_vsrc_color_outputs,
199 };