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
usage(void)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
print_digraph(FILE * outfile,AVFilterGraph * graph)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_channel_layout_describe(&link->ch_layout, buf, sizeof(buf));
95 fprintf(outfile,
96 "fmt:%s sr:%d cl:%s tb:%d/%d",
97 av_get_sample_fmt_name(link->format),
98 link->sample_rate, buf,
99 link->time_base.num, link->time_base.den);
100 }
101 fprintf(outfile, "\" ];\n");
102 }
103 }
104 }
105 fprintf(outfile, "}\n");
106 }
107
main(int argc,char ** argv)108 int main(int argc, char **argv)
109 {
110 const char *outfilename = NULL;
111 const char *infilename = NULL;
112 FILE *outfile = NULL;
113 FILE *infile = NULL;
114 char *graph_string = NULL;
115 AVFilterGraph *graph = NULL;
116 char c;
117
118 av_log_set_level(AV_LOG_DEBUG);
119
120 while ((c = getopt(argc, argv, "hi:o:")) != -1) {
121 switch (c) {
122 case 'h':
123 usage();
124 return 0;
125 case 'i':
126 infilename = optarg;
127 break;
128 case 'o':
129 outfilename = optarg;
130 break;
131 case '?':
132 return 1;
133 }
134 }
135
136 if (!infilename || !strcmp(infilename, "-"))
137 infilename = "/dev/stdin";
138 infile = fopen(infilename, "r");
139 if (!infile) {
140 fprintf(stderr, "Failed to open input file '%s': %s\n",
141 infilename, strerror(errno));
142 return 1;
143 }
144
145 if (!outfilename || !strcmp(outfilename, "-"))
146 outfilename = "/dev/stdout";
147 outfile = fopen(outfilename, "w");
148 if (!outfile) {
149 fprintf(stderr, "Failed to open output file '%s': %s\n",
150 outfilename, strerror(errno));
151 return 1;
152 }
153
154 /* read from infile and put it in a buffer */
155 {
156 int64_t count = 0;
157 struct line *line, *last_line, *first_line;
158 char *p;
159 last_line = first_line = av_malloc(sizeof(struct line));
160 if (!last_line) {
161 fprintf(stderr, "Memory allocation failure\n");
162 return 1;
163 }
164
165 while (fgets(last_line->data, sizeof(last_line->data), infile)) {
166 struct line *new_line = av_malloc(sizeof(struct line));
167 if (!new_line) {
168 fprintf(stderr, "Memory allocation failure\n");
169 return 1;
170 }
171 count += strlen(last_line->data);
172 last_line->next = new_line;
173 last_line = new_line;
174 }
175 last_line->next = NULL;
176
177 graph_string = av_malloc(count + 1);
178 if (!graph_string) {
179 fprintf(stderr, "Memory allocation failure\n");
180 return 1;
181 }
182 p = graph_string;
183 for (line = first_line; line->next; line = line->next) {
184 size_t l = strlen(line->data);
185 memcpy(p, line->data, l);
186 p += l;
187 }
188 *p = '\0';
189 }
190
191 graph = avfilter_graph_alloc();
192 if (!graph) {
193 fprintf(stderr, "Memory allocation failure\n");
194 return 1;
195 }
196
197 if (avfilter_graph_parse(graph, graph_string, NULL, NULL, NULL) < 0) {
198 fprintf(stderr, "Failed to parse the graph description\n");
199 return 1;
200 }
201
202 if (avfilter_graph_config(graph, NULL) < 0)
203 return 1;
204
205 print_digraph(outfile, graph);
206 fflush(outfile);
207
208 return 0;
209 }
210