aviocat: Support avio options
[ffmpeg.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/channel_layout.h"
29 #include "libavutil/mem.h"
30 #include "libavutil/pixdesc.h"
31 #include "libavfilter/avfilter.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->nb_filters; 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->nb_outputs; 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                     const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(link->format);
84                     fprintf(outfile,
85                             " [ label= \"fmt:%s w:%d h:%d tb:%d/%d\" ]",
86                             desc->name, 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, "Failed 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, "Failed 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, "Failed 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 }