doc/examples/decoder_targeted: move to tools/target_dec_fuzzer.c
[ffmpeg.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 "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\\n(%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\\n(%s)",
77                          dst_filter_ctx->name,
78                          dst_filter_ctx->filter->name);
79
80                 fprintf(outfile, "\"%s\" -> \"%s\" [ label= \"inpad:%s -> outpad:%s\\n",
81                         filter_ctx_label, dst_filter_ctx_label,
82                         avfilter_pad_get_name(link->srcpad, 0),
83                         avfilter_pad_get_name(link->dstpad, 0));
84
85                 if (link->type == AVMEDIA_TYPE_VIDEO) {
86                     const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(link->format);
87                     fprintf(outfile,
88                             "fmt:%s w:%d h:%d tb:%d/%d",
89                             desc->name,
90                             link->w, link->h,
91                             link->time_base.num, link->time_base.den);
92                 } else if (link->type == AVMEDIA_TYPE_AUDIO) {
93                     char buf[255];
94                     av_get_channel_layout_string(buf, sizeof(buf), -1,
95                                                  link->channel_layout);
96                     fprintf(outfile,
97                             "fmt:%s sr:%d cl:%s tb:%d/%d",
98                             av_get_sample_fmt_name(link->format),
99                             link->sample_rate, buf,
100                             link->time_base.num, link->time_base.den);
101                 }
102                 fprintf(outfile, "\" ];\n");
103             }
104         }
105     }
106     fprintf(outfile, "}\n");
107 }
108
109 int main(int argc, char **argv)
110 {
111     const char *outfilename = NULL;
112     const char *infilename  = NULL;
113     FILE *outfile           = NULL;
114     FILE *infile            = NULL;
115     char *graph_string      = NULL;
116     AVFilterGraph *graph = av_mallocz(sizeof(AVFilterGraph));
117     char c;
118
119     av_log_set_level(AV_LOG_DEBUG);
120
121     while ((c = getopt(argc, argv, "hi:o:")) != -1) {
122         switch (c) {
123         case 'h':
124             usage();
125             return 0;
126         case 'i':
127             infilename = optarg;
128             break;
129         case 'o':
130             outfilename = optarg;
131             break;
132         case '?':
133             return 1;
134         }
135     }
136
137     if (!infilename || !strcmp(infilename, "-"))
138         infilename = "/dev/stdin";
139     infile = fopen(infilename, "r");
140     if (!infile) {
141         fprintf(stderr, "Failed to open input file '%s': %s\n",
142                 infilename, strerror(errno));
143         return 1;
144     }
145
146     if (!outfilename || !strcmp(outfilename, "-"))
147         outfilename = "/dev/stdout";
148     outfile = fopen(outfilename, "w");
149     if (!outfile) {
150         fprintf(stderr, "Failed to open output file '%s': %s\n",
151                 outfilename, strerror(errno));
152         return 1;
153     }
154
155     /* read from infile and put it in a buffer */
156     {
157         int64_t count = 0;
158         struct line *line, *last_line, *first_line;
159         char *p;
160         last_line = first_line = av_malloc(sizeof(struct line));
161         if (!last_line) {
162             fprintf(stderr, "Memory allocation failure\n");
163             return 1;
164         }
165
166         while (fgets(last_line->data, sizeof(last_line->data), infile)) {
167             struct line *new_line = av_malloc(sizeof(struct line));
168             if (!new_line) {
169                 fprintf(stderr, "Memory allocation failure\n");
170                 return 1;
171             }
172             count += strlen(last_line->data);
173             last_line->next = new_line;
174             last_line       = new_line;
175         }
176         last_line->next = NULL;
177
178         graph_string = av_malloc(count + 1);
179         if (!graph_string) {
180             fprintf(stderr, "Memory allocation failure\n");
181             return 1;
182         }
183         p = graph_string;
184         for (line = first_line; line->next; line = line->next) {
185             size_t l = strlen(line->data);
186             memcpy(p, line->data, l);
187             p += l;
188         }
189         *p = '\0';
190     }
191
192     avfilter_register_all();
193
194     if (avfilter_graph_parse(graph, graph_string, NULL, NULL, NULL) < 0) {
195         fprintf(stderr, "Failed to parse the graph description\n");
196         return 1;
197     }
198
199     if (avfilter_graph_config(graph, NULL) < 0)
200         return 1;
201
202     print_digraph(outfile, graph);
203     fflush(outfile);
204
205     return 0;
206 }