2 * Copyright (c) 2010 Stefano Sabatini
4 * This file is part of Libav.
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.
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.
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
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"
50 int hsub, vsub; ///< chroma subsampling values
57 static av_cold int color_init(AVFilterContext *ctx)
59 ColorContext *color = ctx->priv;
60 AVRational frame_rate_q;
63 if (av_parse_video_size(&color->w, &color->h, color->size_str) < 0) {
64 av_log(ctx, AV_LOG_ERROR, "Invalid frame size: %s\n", color->size_str);
65 return AVERROR(EINVAL);
68 if (av_parse_video_rate(&frame_rate_q, color->framerate_str) < 0 ||
69 frame_rate_q.den <= 0 || frame_rate_q.num <= 0) {
70 av_log(ctx, AV_LOG_ERROR, "Invalid frame rate: %s\n", color->framerate_str);
71 return AVERROR(EINVAL);
73 color->time_base.num = frame_rate_q.den;
74 color->time_base.den = frame_rate_q.num;
76 if ((ret = av_parse_color(color->color, color->color_str, -1, ctx)) < 0)
82 static av_cold void color_uninit(AVFilterContext *ctx)
84 ColorContext *color = ctx->priv;
87 for (i = 0; i < 4; i++) {
88 av_freep(&color->line[i]);
89 color->line_step[i] = 0;
93 static int query_formats(AVFilterContext *ctx)
95 static const enum AVPixelFormat pix_fmts[] = {
96 AV_PIX_FMT_ARGB, AV_PIX_FMT_RGBA,
97 AV_PIX_FMT_ABGR, AV_PIX_FMT_BGRA,
98 AV_PIX_FMT_RGB24, AV_PIX_FMT_BGR24,
100 AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV422P,
101 AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV411P,
102 AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV440P,
103 AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ422P,
104 AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ440P,
110 ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
114 static int color_config_props(AVFilterLink *inlink)
116 AVFilterContext *ctx = inlink->src;
117 ColorContext *color = ctx->priv;
118 uint8_t rgba_color[4];
120 const AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get(inlink->format);
122 color->hsub = pix_desc->log2_chroma_w;
123 color->vsub = pix_desc->log2_chroma_h;
125 color->w &= ~((1 << color->hsub) - 1);
126 color->h &= ~((1 << color->vsub) - 1);
127 if (av_image_check_size(color->w, color->h, 0, ctx) < 0)
128 return AVERROR(EINVAL);
130 memcpy(rgba_color, color->color, sizeof(rgba_color));
131 ff_fill_line_with_color(color->line, color->line_step, color->w, color->color,
132 inlink->format, rgba_color, &is_packed_rgba, NULL);
134 av_log(ctx, AV_LOG_VERBOSE, "w:%d h:%d r:%d/%d color:0x%02x%02x%02x%02x[%s]\n",
135 color->w, color->h, color->time_base.den, color->time_base.num,
136 color->color[0], color->color[1], color->color[2], color->color[3],
137 is_packed_rgba ? "rgba" : "yuva");
138 inlink->w = color->w;
139 inlink->h = color->h;
140 inlink->time_base = color->time_base;
145 static int color_request_frame(AVFilterLink *link)
147 ColorContext *color = link->src->priv;
148 AVFrame *frame = ff_get_video_buffer(link, color->w, color->h);
151 return AVERROR(ENOMEM);
153 frame->sample_aspect_ratio = (AVRational) {1, 1};
154 frame->pts = color->pts++;
156 ff_draw_rectangle(frame->data, frame->linesize,
157 color->line, color->line_step, color->hsub, color->vsub,
158 0, 0, color->w, color->h);
159 return ff_filter_frame(link, frame);
162 #define OFFSET(x) offsetof(ColorContext, x)
163 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM
164 static const AVOption options[] = {
165 { "color", "Output video color", OFFSET(color_str), AV_OPT_TYPE_STRING, { .str = "black" }, .flags = FLAGS },
166 { "size", "Output video size (wxh or an abbreviation)", OFFSET(size_str), AV_OPT_TYPE_STRING, { .str = "320x240" }, .flags = FLAGS },
167 { "framerate", "Output video framerate", OFFSET(framerate_str), AV_OPT_TYPE_STRING, { .str = "25" }, .flags = FLAGS },
171 static const AVClass color_class = {
172 .class_name = "color",
173 .item_name = av_default_item_name,
175 .version = LIBAVUTIL_VERSION_INT,
178 static const AVFilterPad avfilter_vsrc_color_outputs[] = {
181 .type = AVMEDIA_TYPE_VIDEO,
182 .request_frame = color_request_frame,
183 .config_props = color_config_props
188 AVFilter ff_vsrc_color = {
190 .description = NULL_IF_CONFIG_SMALL("Provide an uniformly colored input, syntax is: [color[:size[:rate]]]"),
192 .priv_class = &color_class,
193 .priv_size = sizeof(ColorContext),
195 .uninit = color_uninit,
197 .query_formats = query_formats,
201 .outputs = avfilter_vsrc_color_outputs,