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
22 #include "libavutil/pixdesc.h"
23 #include "libavutil/colorspace.h"
24 #include "libavutil/imgutils.h"
25 #include "libavutil/mathematics.h"
26 #include "libavutil/parseutils.h"
27 #include "drawutils.h"
35 int hsub, vsub; ///< chroma subsampling values
39 static av_cold int color_init(AVFilterContext *ctx, const char *args, void *opaque)
41 ColorContext *color = ctx->priv;
42 char color_string[128] = "black";
43 char frame_size [128] = "320x240";
44 char frame_rate [128] = "25";
45 AVRational frame_rate_q;
49 sscanf(args, "%127[^:]:%127[^:]:%127s", color_string, frame_size, frame_rate);
51 if (av_parse_video_size(&color->w, &color->h, frame_size) < 0) {
52 av_log(ctx, AV_LOG_ERROR, "Invalid frame size: %s\n", frame_size);
53 return AVERROR(EINVAL);
56 if (av_parse_video_rate(&frame_rate_q, frame_rate) < 0 ||
57 frame_rate_q.den <= 0 || frame_rate_q.num <= 0) {
58 av_log(ctx, AV_LOG_ERROR, "Invalid frame rate: %s\n", frame_rate);
59 return AVERROR(EINVAL);
61 color->time_base.num = frame_rate_q.den;
62 color->time_base.den = frame_rate_q.num;
64 if ((ret = av_parse_color(color->color, color_string, -1, ctx)) < 0)
70 static av_cold void color_uninit(AVFilterContext *ctx)
72 ColorContext *color = ctx->priv;
75 for (i = 0; i < 4; i++) {
76 av_freep(&color->line[i]);
77 color->line_step[i] = 0;
81 static int query_formats(AVFilterContext *ctx)
83 static const enum PixelFormat pix_fmts[] = {
84 PIX_FMT_ARGB, PIX_FMT_RGBA,
85 PIX_FMT_ABGR, PIX_FMT_BGRA,
86 PIX_FMT_RGB24, PIX_FMT_BGR24,
88 PIX_FMT_YUV444P, PIX_FMT_YUV422P,
89 PIX_FMT_YUV420P, PIX_FMT_YUV411P,
90 PIX_FMT_YUV410P, PIX_FMT_YUV440P,
91 PIX_FMT_YUVJ444P, PIX_FMT_YUVJ422P,
92 PIX_FMT_YUVJ420P, PIX_FMT_YUVJ440P,
98 avfilter_set_common_formats(ctx, avfilter_make_format_list(pix_fmts));
102 static int color_config_props(AVFilterLink *inlink)
104 AVFilterContext *ctx = inlink->src;
105 ColorContext *color = ctx->priv;
106 uint8_t rgba_color[4];
108 const AVPixFmtDescriptor *pix_desc = &av_pix_fmt_descriptors[inlink->format];
110 color->hsub = pix_desc->log2_chroma_w;
111 color->vsub = pix_desc->log2_chroma_h;
113 color->w &= ~((1 << color->hsub) - 1);
114 color->h &= ~((1 << color->vsub) - 1);
115 if (av_image_check_size(color->w, color->h, 0, ctx) < 0)
116 return AVERROR(EINVAL);
118 memcpy(rgba_color, color->color, sizeof(rgba_color));
119 ff_fill_line_with_color(color->line, color->line_step, color->w, color->color,
120 inlink->format, rgba_color, &is_packed_rgba, NULL);
122 av_log(ctx, AV_LOG_INFO, "w:%d h:%d r:%d/%d color:0x%02x%02x%02x%02x[%s]\n",
123 color->w, color->h, color->time_base.den, color->time_base.num,
124 color->color[0], color->color[1], color->color[2], color->color[3],
125 is_packed_rgba ? "rgba" : "yuva");
126 inlink->w = color->w;
127 inlink->h = color->h;
132 static int color_request_frame(AVFilterLink *link)
134 ColorContext *color = link->src->priv;
135 AVFilterBufferRef *picref = avfilter_get_video_buffer(link, AV_PERM_WRITE, color->w, color->h);
136 picref->video->pixel_aspect = (AVRational) {1, 1};
137 picref->pts = av_rescale_q(color->pts++, color->time_base, AV_TIME_BASE_Q);
140 avfilter_start_frame(link, avfilter_ref_buffer(picref, ~0));
141 ff_draw_rectangle(picref->data, picref->linesize,
142 color->line, color->line_step, color->hsub, color->vsub,
143 0, 0, color->w, color->h);
144 avfilter_draw_slice(link, 0, color->h, 1);
145 avfilter_end_frame(link);
146 avfilter_unref_buffer(picref);
151 AVFilter avfilter_vsrc_color = {
153 .description = NULL_IF_CONFIG_SMALL("Provide an uniformly colored input, syntax is: [color[:size[:rate]]]"),
155 .priv_size = sizeof(ColorContext),
157 .uninit = color_uninit,
159 .query_formats = query_formats,
161 .inputs = (AVFilterPad[]) {{ .name = NULL}},
163 .outputs = (AVFilterPad[]) {{ .name = "default",
164 .type = AVMEDIA_TYPE_VIDEO,
165 .request_frame = color_request_frame,
166 .config_props = color_config_props },