2 * Copyright (c) 2008-2010 Stefano Sabatini
4 * This file is part of FFmpeg.
6 * FFmpeg 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 * FFmpeg 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 FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23 #include <unistd.h> /* getopt */
28 #include "libavutil/channel_layout.h"
29 #include "libavutil/mem.h"
30 #include "libavutil/pixdesc.h"
31 #include "libavfilter/avfiltergraph.h"
34 #include "compat/getopt.c"
37 static void usage(void)
39 printf("Convert a libavfilter graph to a dot file\n");
40 printf("Usage: graph2dot [OPTIONS]\n");
43 "-i INFILE set INFILE as input file, stdin if omitted\n"
44 "-o OUTFILE set OUTFILE as output file, stdout if omitted\n"
45 "-h print this help\n");
53 static void print_digraph(FILE *outfile, AVFilterGraph *graph)
57 fprintf(outfile, "digraph G {\n");
58 fprintf(outfile, "node [shape=box]\n");
59 fprintf(outfile, "rankdir=LR\n");
61 for (i = 0; i < graph->filter_count; i++) {
62 char filter_ctx_label[128];
63 const AVFilterContext *filter_ctx = graph->filters[i];
65 snprintf(filter_ctx_label, sizeof(filter_ctx_label), "%s\\n(%s)",
67 filter_ctx->filter->name);
69 for (j = 0; j < filter_ctx->output_count; j++) {
70 AVFilterLink *link = filter_ctx->outputs[j];
72 char dst_filter_ctx_label[128];
73 const AVFilterContext *dst_filter_ctx = link->dst;
75 snprintf(dst_filter_ctx_label, sizeof(dst_filter_ctx_label),
78 dst_filter_ctx->filter->name);
80 fprintf(outfile, "\"%s\" -> \"%s\" [ label= \"inpad:%s -> outpad:%s\\n",
81 filter_ctx_label, dst_filter_ctx_label,
82 link->srcpad->name, link->dstpad->name);
84 if (link->type == AVMEDIA_TYPE_VIDEO) {
85 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(link->format);
87 "fmt:%s w:%d h:%d tb:%d/%d",
90 link->time_base.num, link->time_base.den);
91 } else if (link->type == AVMEDIA_TYPE_AUDIO) {
93 av_get_channel_layout_string(buf, sizeof(buf), -1,
94 link->channel_layout);
96 "fmt:%s sr:%d cl:%s tb:%d/%d",
97 av_get_sample_fmt_name(link->format),
98 link->sample_rate, buf,
99 link->time_base.num, link->time_base.den);
101 fprintf(outfile, "\" ];\n");
105 fprintf(outfile, "}\n");
108 int main(int argc, char **argv)
110 const char *outfilename = NULL;
111 const char *infilename = NULL;
112 FILE *outfile = NULL;
114 char *graph_string = NULL;
115 AVFilterGraph *graph = av_mallocz(sizeof(AVFilterGraph));
118 av_log_set_level(AV_LOG_DEBUG);
120 while ((c = getopt(argc, argv, "hi:o:")) != -1) {
129 outfilename = optarg;
136 if (!infilename || !strcmp(infilename, "-"))
137 infilename = "/dev/stdin";
138 infile = fopen(infilename, "r");
140 fprintf(stderr, "Impossible to open input file '%s': %s\n",
141 infilename, strerror(errno));
145 if (!outfilename || !strcmp(outfilename, "-"))
146 outfilename = "/dev/stdout";
147 outfile = fopen(outfilename, "w");
149 fprintf(stderr, "Impossible to open output file '%s': %s\n",
150 outfilename, strerror(errno));
154 /* read from infile and put it in a buffer */
156 unsigned int count = 0;
157 struct line *line, *last_line, *first_line;
159 last_line = first_line = av_malloc(sizeof(struct line));
161 while (fgets(last_line->data, sizeof(last_line->data), infile)) {
162 struct line *new_line = av_malloc(sizeof(struct line));
163 count += strlen(last_line->data);
164 last_line->next = new_line;
165 last_line = new_line;
167 last_line->next = NULL;
169 graph_string = av_malloc(count + 1);
171 for (line = first_line; line->next; line = line->next) {
172 unsigned int l = strlen(line->data);
173 memcpy(p, line->data, l);
179 avfilter_register_all();
181 if (avfilter_graph_parse(graph, graph_string, NULL, NULL, NULL) < 0) {
182 fprintf(stderr, "Impossible to parse the graph description\n");
186 if (avfilter_graph_config(graph, NULL) < 0)
189 print_digraph(outfile, graph);