Update help message for the -pad* options, as they have been removed,
[libav.git] / tools / graph2dot.c
1 /*
2 * Copyright (c) 2008-2010 Stefano Sabatini
3 *
4 * This file is part of FFmpeg.
5 *
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.
10 *
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.
15 *
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
19 */
20
21 #include <unistd.h> /* getopt */
22
23 #undef HAVE_AV_CONFIG_H
24 #include "libavutil/pixdesc.h"
25 #include "libavfilter/graphparser.h"
26
27 static void usage(void)
28 {
29 printf("Convert a libavfilter graph to a dot file\n");
30 printf("Usage: graph2dot [OPTIONS]\n");
31 printf("\n"
32 "Options:\n"
33 "-i INFILE set INFILE as input file, stdin if omitted\n"
34 "-o OUTFILE set OUTFILE as output file, stdout if omitted\n"
35 "-h print this help\n");
36 }
37
38 struct line {
39 char data[256];
40 struct line *next;
41 };
42
43 static void print_digraph(FILE *outfile, AVFilterGraph *graph)
44 {
45 int i, j;
46
47 fprintf(outfile, "digraph G {\n");
48 fprintf(outfile, "node [shape=box]\n");
49 fprintf(outfile, "rankdir=LR\n");
50
51 for (i = 0; i < graph->filter_count; i++) {
52 char filter_ctx_label[128];
53 const AVFilterContext *filter_ctx = graph->filters[i];
54
55 snprintf(filter_ctx_label, sizeof(filter_ctx_label), "%s (%s)",
56 filter_ctx->name,
57 filter_ctx->filter->name);
58
59 for (j = 0; j < filter_ctx->output_count; j++) {
60 AVFilterLink *link = filter_ctx->outputs[j];
61 if (link) {
62 char dst_filter_ctx_label[128];
63 const AVFilterContext *dst_filter_ctx = link->dst;
64
65 snprintf(dst_filter_ctx_label, sizeof(dst_filter_ctx_label), "%s (%s)",
66 dst_filter_ctx->name,
67 dst_filter_ctx->filter->name);
68
69 fprintf(outfile, "\"%s\" -> \"%s\"", filter_ctx_label, dst_filter_ctx_label);
70 fprintf(outfile, " [ label= \"fmt:%s w:%d h:%d\"];\n",
71 av_pix_fmt_descriptors[link->format].name, link->w, link->h);
72 }
73 }
74 }
75 fprintf(outfile, "}\n");
76 }
77
78 int main(int argc, char **argv)
79 {
80 const char *outfilename = NULL;
81 const char *infilename = NULL;
82 FILE *outfile = NULL;
83 FILE *infile = NULL;
84 char *graph_string = NULL;
85 AVFilterGraph *graph = av_mallocz(sizeof(AVFilterGraph));
86 char c;
87
88 av_log_set_level(AV_LOG_DEBUG);
89
90 while ((c = getopt(argc, argv, "hi:o:")) != -1) {
91 switch(c) {
92 case 'h':
93 usage();
94 return 0;
95 case 'i':
96 infilename = optarg;
97 break;
98 case 'o':
99 outfilename = optarg;
100 break;
101 case '?':
102 return 1;
103 }
104 }
105
106 if (!infilename || !strcmp(infilename, "-"))
107 infilename = "/dev/stdin";
108 infile = fopen(infilename, "r");
109 if (!infile) {
110 fprintf(stderr, "Impossible to open input file '%s': %s\n", infilename, strerror(errno));
111 return 1;
112 }
113
114 if (!outfilename || !strcmp(outfilename, "-"))
115 outfilename = "/dev/stdout";
116 outfile = fopen(outfilename, "w");
117 if (!outfile) {
118 fprintf(stderr, "Impossible to open output file '%s': %s\n", outfilename, strerror(errno));
119 return 1;
120 }
121
122 /* read from infile and put it in a buffer */
123 {
124 unsigned int count = 0;
125 struct line *line, *last_line, *first_line;
126 char *p;
127 last_line = first_line = av_malloc(sizeof(struct line));
128
129 while (fgets(last_line->data, sizeof(last_line->data), infile)) {
130 struct line *new_line = av_malloc(sizeof(struct line));
131 count += strlen(last_line->data);
132 last_line->next = new_line;
133 last_line = new_line;
134 }
135 last_line->next = NULL;
136
137 graph_string = av_malloc(count + 1);
138 p = graph_string;
139 for (line = first_line; line->next; line = line->next) {
140 unsigned int l = strlen(line->data);
141 memcpy(p, line->data, l);
142 p += l;
143 }
144 *p = '\0';
145 }
146
147 avfilter_register_all();
148
149 if (avfilter_graph_parse(graph, graph_string, NULL, NULL, NULL) < 0) {
150 fprintf(stderr, "Impossible to parse the graph description\n");
151 return 1;
152 }
153
154 if (avfilter_graph_check_validity(graph, NULL) ||
155 avfilter_graph_config_formats(graph, NULL) ||
156 avfilter_graph_config_links (graph, NULL))
157 return 1;
158
159 print_digraph(outfile, graph);
160 fflush(outfile);
161
162 return 0;
163 }