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/parseutils.h"
40 #include "drawutils.h"
48 int hsub, vsub; ///< chroma subsampling values
52 static av_cold int color_init(AVFilterContext *ctx, const char *args)
54 ColorContext *color = ctx->priv;
55 char color_string[128] = "black";
56 char frame_size [128] = "320x240";
57 char frame_rate [128] = "25";
58 AVRational frame_rate_q;
62 sscanf(args, "%127[^:]:%127[^:]:%127s", color_string, frame_size, frame_rate);
64 if (av_parse_video_size(&color->w, &color->h, frame_size) < 0) {
65 av_log(ctx, AV_LOG_ERROR, "Invalid frame size: %s\n", frame_size);
66 return AVERROR(EINVAL);
69 if (av_parse_video_rate(&frame_rate_q, frame_rate) < 0 ||
70 frame_rate_q.den <= 0 || frame_rate_q.num <= 0) {
71 av_log(ctx, AV_LOG_ERROR, "Invalid frame rate: %s\n", frame_rate);
72 return AVERROR(EINVAL);
74 color->time_base.num = frame_rate_q.den;
75 color->time_base.den = frame_rate_q.num;
77 if ((ret = av_parse_color(color->color, color_string, -1, ctx)) < 0)
83 static av_cold void color_uninit(AVFilterContext *ctx)
85 ColorContext *color = ctx->priv;
88 for (i = 0; i < 4; i++) {
89 av_freep(&color->line[i]);
90 color->line_step[i] = 0;
94 static int query_formats(AVFilterContext *ctx)
96 static const enum AVPixelFormat pix_fmts[] = {
97 AV_PIX_FMT_ARGB, AV_PIX_FMT_RGBA,
98 AV_PIX_FMT_ABGR, AV_PIX_FMT_BGRA,
99 AV_PIX_FMT_RGB24, AV_PIX_FMT_BGR24,
101 AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV422P,
102 AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV411P,
103 AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV440P,
104 AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ422P,
105 AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ440P,
111 ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
115 static int color_config_props(AVFilterLink *inlink)
117 AVFilterContext *ctx = inlink->src;
118 ColorContext *color = ctx->priv;
119 uint8_t rgba_color[4];
121 const AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get(inlink->format);
123 color->hsub = pix_desc->log2_chroma_w;
124 color->vsub = pix_desc->log2_chroma_h;
126 color->w &= ~((1 << color->hsub) - 1);
127 color->h &= ~((1 << color->vsub) - 1);
128 if (av_image_check_size(color->w, color->h, 0, ctx) < 0)
129 return AVERROR(EINVAL);
131 memcpy(rgba_color, color->color, sizeof(rgba_color));
132 ff_fill_line_with_color(color->line, color->line_step, color->w, color->color,
133 inlink->format, rgba_color, &is_packed_rgba, NULL);
135 av_log(ctx, AV_LOG_VERBOSE, "w:%d h:%d r:%d/%d color:0x%02x%02x%02x%02x[%s]\n",
136 color->w, color->h, color->time_base.den, color->time_base.num,
137 color->color[0], color->color[1], color->color[2], color->color[3],
138 is_packed_rgba ? "rgba" : "yuva");
139 inlink->w = color->w;
140 inlink->h = color->h;
141 inlink->time_base = color->time_base;
146 static int color_request_frame(AVFilterLink *link)
148 ColorContext *color = link->src->priv;
149 AVFilterBufferRef *picref = ff_get_video_buffer(link, AV_PERM_WRITE, color->w, color->h);
150 AVFilterBufferRef *buf_out;
154 return AVERROR(ENOMEM);
156 picref->video->pixel_aspect = (AVRational) {1, 1};
157 picref->pts = color->pts++;
160 buf_out = avfilter_ref_buffer(picref, ~0);
162 ret = AVERROR(ENOMEM);
166 ret = ff_start_frame(link, buf_out);
170 ff_draw_rectangle(picref->data, picref->linesize,
171 color->line, color->line_step, color->hsub, color->vsub,
172 0, 0, color->w, color->h);
173 ret = ff_draw_slice(link, 0, color->h, 1);
177 ret = ff_end_frame(link);
180 avfilter_unref_buffer(picref);
185 static const AVFilterPad avfilter_vsrc_color_outputs[] = {
188 .type = AVMEDIA_TYPE_VIDEO,
189 .request_frame = color_request_frame,
190 .config_props = color_config_props
195 AVFilter avfilter_vsrc_color = {
197 .description = NULL_IF_CONFIG_SMALL("Provide an uniformly colored input, syntax is: [color[:size[:rate]]]"),
199 .priv_size = sizeof(ColorContext),
201 .uninit = color_uninit,
203 .query_formats = query_formats,
207 .outputs = avfilter_vsrc_color_outputs,