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path: root/tools/graph2dot.c (plain)
blob: 21d0795e8818478c59609518afd350c99f8e1fa8
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
37static 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
48struct line {
49 char data[256];
50 struct line *next;
51};
52
53static 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
109int 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}
207
generated by cgit at 2024-05-17 05:47:47 (GMT)