graph2dot: Use the fallback getopt implementation if needed
[libav.git] / tools / graph2dot.c
1 /*
2 * Copyright (c) 2008-2010 Stefano Sabatini
3 *
4 * This file is part of Libav.
5 *
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.
10 *
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.
15 *
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
19 */
20
21 #include "config.h"
22 #if HAVE_UNISTD_H
23 #include <unistd.h> /* getopt */
24 #endif
25 #include <stdio.h>
26 #include <string.h>
27
28 #include "libavutil/mem.h"
29 #include "libavutil/pixdesc.h"
30 #include "libavutil/audioconvert.h"
31 #include "libavfilter/avfiltergraph.h"
32
33 #if !HAVE_GETOPT
34 #include "compat/getopt.c"
35 #endif
36
37 static void usage(void)
38 {
39 printf("Convert a libavfilter graph to a dot file\n");
40 printf("Usage: graph2dot [OPTIONS]\n");
41 printf("\n"
42 "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");
46 }
47
48 struct line {
49 char data[256];
50 struct line *next;
51 };
52
53 static void print_digraph(FILE *outfile, AVFilterGraph *graph)
54 {
55 int i, j;
56
57 fprintf(outfile, "digraph G {\n");
58 fprintf(outfile, "node [shape=box]\n");
59 fprintf(outfile, "rankdir=LR\n");
60
61 for (i = 0; i < graph->filter_count; i++) {
62 char filter_ctx_label[128];
63 const AVFilterContext *filter_ctx = graph->filters[i];
64
65 snprintf(filter_ctx_label, sizeof(filter_ctx_label), "%s (%s)",
66 filter_ctx->name,
67 filter_ctx->filter->name);
68
69 for (j = 0; j < filter_ctx->output_count; j++) {
70 AVFilterLink *link = filter_ctx->outputs[j];
71 if (link) {
72 char dst_filter_ctx_label[128];
73 const AVFilterContext *dst_filter_ctx = link->dst;
74
75 snprintf(dst_filter_ctx_label, sizeof(dst_filter_ctx_label),
76 "%s (%s)",
77 dst_filter_ctx->name,
78 dst_filter_ctx->filter->name);
79
80 fprintf(outfile, "\"%s\" -> \"%s\"",
81 filter_ctx_label, dst_filter_ctx_label);
82 if (link->type == AVMEDIA_TYPE_VIDEO) {
83 fprintf(outfile,
84 " [ label= \"fmt:%s w:%d h:%d tb:%d/%d\" ]",
85 av_pix_fmt_descriptors[link->format].name,
86 link->w, link->h, link->time_base.num,
87 link->time_base.den);
88 } else if (link->type == AVMEDIA_TYPE_AUDIO) {
89 char buf[255];
90 av_get_channel_layout_string(buf, sizeof(buf), -1,
91 link->channel_layout);
92 fprintf(outfile,
93 " [ label= \"fmt:%s sr:%d cl:%s\" ]",
94 av_get_sample_fmt_name(link->format),
95 link->sample_rate, buf);
96 }
97 fprintf(outfile, ";\n");
98 }
99 }
100 }
101 fprintf(outfile, "}\n");
102 }
103
104 int main(int argc, char **argv)
105 {
106 const char *outfilename = NULL;
107 const char *infilename = NULL;
108 FILE *outfile = NULL;
109 FILE *infile = NULL;
110 char *graph_string = NULL;
111 AVFilterGraph *graph = av_mallocz(sizeof(AVFilterGraph));
112 char c;
113
114 av_log_set_level(AV_LOG_DEBUG);
115
116 while ((c = getopt(argc, argv, "hi:o:")) != -1) {
117 switch (c) {
118 case 'h':
119 usage();
120 return 0;
121 case 'i':
122 infilename = optarg;
123 break;
124 case 'o':
125 outfilename = optarg;
126 break;
127 case '?':
128 return 1;
129 }
130 }
131
132 if (!infilename || !strcmp(infilename, "-"))
133 infilename = "/dev/stdin";
134 infile = fopen(infilename, "r");
135 if (!infile) {
136 fprintf(stderr, "Impossible to open input file '%s': %s\n",
137 infilename, strerror(errno));
138 return 1;
139 }
140
141 if (!outfilename || !strcmp(outfilename, "-"))
142 outfilename = "/dev/stdout";
143 outfile = fopen(outfilename, "w");
144 if (!outfile) {
145 fprintf(stderr, "Impossible to open output file '%s': %s\n",
146 outfilename, strerror(errno));
147 return 1;
148 }
149
150 /* read from infile and put it in a buffer */
151 {
152 unsigned int count = 0;
153 struct line *line, *last_line, *first_line;
154 char *p;
155 last_line = first_line = av_malloc(sizeof(struct line));
156
157 while (fgets(last_line->data, sizeof(last_line->data), infile)) {
158 struct line *new_line = av_malloc(sizeof(struct line));
159 count += strlen(last_line->data);
160 last_line->next = new_line;
161 last_line = new_line;
162 }
163 last_line->next = NULL;
164
165 graph_string = av_malloc(count + 1);
166 p = graph_string;
167 for (line = first_line; line->next; line = line->next) {
168 unsigned int l = strlen(line->data);
169 memcpy(p, line->data, l);
170 p += l;
171 }
172 *p = '\0';
173 }
174
175 avfilter_register_all();
176
177 if (avfilter_graph_parse(graph, graph_string, NULL, NULL, NULL) < 0) {
178 fprintf(stderr, "Impossible to parse the graph description\n");
179 return 1;
180 }
181
182 if (avfilter_graph_config(graph, NULL) < 0)
183 return 1;
184
185 print_digraph(outfile, graph);
186 fflush(outfile);
187
188 return 0;
189 }