tools: K&R reformatting cosmetics
[libav.git] / tools / graph2dot.c
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1/*
2 * Copyright (c) 2008-2010 Stefano Sabatini
3 *
2912e87a 4 * This file is part of Libav.
11ab237e 5 *
2912e87a 6 * Libav is free software; you can redistribute it and/or
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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 *
2912e87a 11 * Libav is distributed in the hope that it will be useful,
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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
2912e87a 17 * License along with Libav; if not, write to the Free Software
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18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21#include <unistd.h> /* getopt */
22
23#undef HAVE_AV_CONFIG_H
24#include "libavutil/pixdesc.h"
009026ef 25#include "libavutil/audioconvert.h"
1e80a0ea 26#include "libavfilter/avfiltergraph.h"
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27
28static void usage(void)
29{
30 printf("Convert a libavfilter graph to a dot file\n");
31 printf("Usage: graph2dot [OPTIONS]\n");
32 printf("\n"
33 "Options:\n"
34 "-i INFILE set INFILE as input file, stdin if omitted\n"
35 "-o OUTFILE set OUTFILE as output file, stdout if omitted\n"
36 "-h print this help\n");
37}
38
39struct line {
40 char data[256];
41 struct line *next;
42};
43
44static void print_digraph(FILE *outfile, AVFilterGraph *graph)
45{
46 int i, j;
47
48 fprintf(outfile, "digraph G {\n");
49 fprintf(outfile, "node [shape=box]\n");
50 fprintf(outfile, "rankdir=LR\n");
51
52 for (i = 0; i < graph->filter_count; i++) {
53 char filter_ctx_label[128];
54 const AVFilterContext *filter_ctx = graph->filters[i];
55
56 snprintf(filter_ctx_label, sizeof(filter_ctx_label), "%s (%s)",
57 filter_ctx->name,
58 filter_ctx->filter->name);
59
60 for (j = 0; j < filter_ctx->output_count; j++) {
61 AVFilterLink *link = filter_ctx->outputs[j];
62 if (link) {
63 char dst_filter_ctx_label[128];
64 const AVFilterContext *dst_filter_ctx = link->dst;
65
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66 snprintf(dst_filter_ctx_label, sizeof(dst_filter_ctx_label),
67 "%s (%s)",
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68 dst_filter_ctx->name,
69 dst_filter_ctx->filter->name);
70
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71 fprintf(outfile, "\"%s\" -> \"%s\"",
72 filter_ctx_label, dst_filter_ctx_label);
009026ef 73 if (link->type == AVMEDIA_TYPE_VIDEO) {
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74 fprintf(outfile,
75 " [ label= \"fmt:%s w:%d h:%d tb:%d/%d\" ]",
009026ef 76 av_pix_fmt_descriptors[link->format].name,
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77 link->w, link->h, link->time_base.num,
78 link->time_base.den);
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79 } else if (link->type == AVMEDIA_TYPE_AUDIO) {
80 char buf[255];
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81 av_get_channel_layout_string(buf, sizeof(buf), -1,
82 link->channel_layout);
83 fprintf(outfile,
84 " [ label= \"fmt:%s sr:%"PRId64 " cl:%s\" ]",
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85 av_get_sample_fmt_name(link->format),
86 link->sample_rate, buf);
87 }
88 fprintf(outfile, ";\n");
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89 }
90 }
91 }
92 fprintf(outfile, "}\n");
93}
94
95int main(int argc, char **argv)
96{
97 const char *outfilename = NULL;
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98 const char *infilename = NULL;
99 FILE *outfile = NULL;
100 FILE *infile = NULL;
101 char *graph_string = NULL;
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102 AVFilterGraph *graph = av_mallocz(sizeof(AVFilterGraph));
103 char c;
104
105 av_log_set_level(AV_LOG_DEBUG);
106
107 while ((c = getopt(argc, argv, "hi:o:")) != -1) {
4e81b5f5 108 switch (c) {
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109 case 'h':
110 usage();
111 return 0;
112 case 'i':
113 infilename = optarg;
114 break;
115 case 'o':
116 outfilename = optarg;
117 break;
118 case '?':
119 return 1;
120 }
121 }
122
123 if (!infilename || !strcmp(infilename, "-"))
124 infilename = "/dev/stdin";
125 infile = fopen(infilename, "r");
126 if (!infile) {
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127 fprintf(stderr, "Impossible to open input file '%s': %s\n",
128 infilename, strerror(errno));
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129 return 1;
130 }
131
132 if (!outfilename || !strcmp(outfilename, "-"))
133 outfilename = "/dev/stdout";
134 outfile = fopen(outfilename, "w");
135 if (!outfile) {
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136 fprintf(stderr, "Impossible to open output file '%s': %s\n",
137 outfilename, strerror(errno));
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138 return 1;
139 }
140
141 /* read from infile and put it in a buffer */
142 {
143 unsigned int count = 0;
144 struct line *line, *last_line, *first_line;
145 char *p;
146 last_line = first_line = av_malloc(sizeof(struct line));
147
148 while (fgets(last_line->data, sizeof(last_line->data), infile)) {
149 struct line *new_line = av_malloc(sizeof(struct line));
150 count += strlen(last_line->data);
151 last_line->next = new_line;
4e81b5f5 152 last_line = new_line;
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153 }
154 last_line->next = NULL;
155
156 graph_string = av_malloc(count + 1);
157 p = graph_string;
158 for (line = first_line; line->next; line = line->next) {
159 unsigned int l = strlen(line->data);
160 memcpy(p, line->data, l);
161 p += l;
162 }
163 *p = '\0';
164 }
165
166 avfilter_register_all();
167
168 if (avfilter_graph_parse(graph, graph_string, NULL, NULL, NULL) < 0) {
169 fprintf(stderr, "Impossible to parse the graph description\n");
170 return 1;
171 }
172
2a24df93 173 if (avfilter_graph_config(graph, NULL) < 0)
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174 return 1;
175
176 print_digraph(outfile, graph);
177 fflush(outfile);
178
179 return 0;
180}