2 * Copyright (c) 2008-2010 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
21 #include <unistd.h> /* getopt */
25 #include "libavutil/mem.h"
26 #include "libavutil/pixdesc.h"
27 #include "libavutil/audioconvert.h"
28 #include "libavfilter/avfiltergraph.h"
30 static void usage(void)
32 printf("Convert a libavfilter graph to a dot file\n");
33 printf("Usage: graph2dot [OPTIONS]\n");
36 "-i INFILE set INFILE as input file, stdin if omitted\n"
37 "-o OUTFILE set OUTFILE as output file, stdout if omitted\n"
38 "-h print this help\n");
46 static void print_digraph(FILE *outfile, AVFilterGraph *graph)
50 fprintf(outfile, "digraph G {\n");
51 fprintf(outfile, "node [shape=box]\n");
52 fprintf(outfile, "rankdir=LR\n");
54 for (i = 0; i < graph->filter_count; i++) {
55 char filter_ctx_label[128];
56 const AVFilterContext *filter_ctx = graph->filters[i];
58 snprintf(filter_ctx_label, sizeof(filter_ctx_label), "%s (%s)",
60 filter_ctx->filter->name);
62 for (j = 0; j < filter_ctx->output_count; j++) {
63 AVFilterLink *link = filter_ctx->outputs[j];
65 char dst_filter_ctx_label[128];
66 const AVFilterContext *dst_filter_ctx = link->dst;
68 snprintf(dst_filter_ctx_label, sizeof(dst_filter_ctx_label),
71 dst_filter_ctx->filter->name);
73 fprintf(outfile, "\"%s\" -> \"%s\"",
74 filter_ctx_label, dst_filter_ctx_label);
75 if (link->type == AVMEDIA_TYPE_VIDEO) {
77 " [ label= \"fmt:%s w:%d h:%d tb:%d/%d\" ]",
78 av_pix_fmt_descriptors[link->format].name,
79 link->w, link->h, link->time_base.num,
81 } else if (link->type == AVMEDIA_TYPE_AUDIO) {
83 av_get_channel_layout_string(buf, sizeof(buf), -1,
84 link->channel_layout);
86 " [ label= \"fmt:%s sr:%d cl:%s\" ]",
87 av_get_sample_fmt_name(link->format),
88 link->sample_rate, buf);
90 fprintf(outfile, ";\n");
94 fprintf(outfile, "}\n");
97 int main(int argc, char **argv)
99 const char *outfilename = NULL;
100 const char *infilename = NULL;
101 FILE *outfile = NULL;
103 char *graph_string = NULL;
104 AVFilterGraph *graph = av_mallocz(sizeof(AVFilterGraph));
107 av_log_set_level(AV_LOG_DEBUG);
109 while ((c = getopt(argc, argv, "hi:o:")) != -1) {
118 outfilename = optarg;
125 if (!infilename || !strcmp(infilename, "-"))
126 infilename = "/dev/stdin";
127 infile = fopen(infilename, "r");
129 fprintf(stderr, "Impossible to open input file '%s': %s\n",
130 infilename, strerror(errno));
134 if (!outfilename || !strcmp(outfilename, "-"))
135 outfilename = "/dev/stdout";
136 outfile = fopen(outfilename, "w");
138 fprintf(stderr, "Impossible to open output file '%s': %s\n",
139 outfilename, strerror(errno));
143 /* read from infile and put it in a buffer */
145 unsigned int count = 0;
146 struct line *line, *last_line, *first_line;
148 last_line = first_line = av_malloc(sizeof(struct line));
150 while (fgets(last_line->data, sizeof(last_line->data), infile)) {
151 struct line *new_line = av_malloc(sizeof(struct line));
152 count += strlen(last_line->data);
153 last_line->next = new_line;
154 last_line = new_line;
156 last_line->next = NULL;
158 graph_string = av_malloc(count + 1);
160 for (line = first_line; line->next; line = line->next) {
161 unsigned int l = strlen(line->data);
162 memcpy(p, line->data, l);
168 avfilter_register_all();
170 if (avfilter_graph_parse(graph, graph_string, NULL, NULL, NULL) < 0) {
171 fprintf(stderr, "Impossible to parse the graph description\n");
175 if (avfilter_graph_config(graph, NULL) < 0)
178 print_digraph(outfile, graph);