tools: Remove some unnecessary #undefs.
[libav.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 <unistd.h> /* getopt */
22
23 #include "libavutil/pixdesc.h"
24 #include "libavutil/audioconvert.h"
25 #include "libavfilter/avfiltergraph.h"
26
27 static void usage(void)
28 {
29 printf("Convert a libavfilter graph to a dot file\n");
30 printf("Usage: graph2dot [OPTIONS]\n");
31 printf("\n"
32 "Options:\n"
33 "-i INFILE set INFILE as input file, stdin if omitted\n"
34 "-o OUTFILE set OUTFILE as output file, stdout if omitted\n"
35 "-h print this help\n");
36 }
37
38 struct line {
39 char data[256];
40 struct line *next;
41 };
42
43 static void print_digraph(FILE *outfile, AVFilterGraph *graph)
44 {
45 int i, j;
46
47 fprintf(outfile, "digraph G {\n");
48 fprintf(outfile, "node [shape=box]\n");
49 fprintf(outfile, "rankdir=LR\n");
50
51 for (i = 0; i < graph->filter_count; i++) {
52 char filter_ctx_label[128];
53 const AVFilterContext *filter_ctx = graph->filters[i];
54
55 snprintf(filter_ctx_label, sizeof(filter_ctx_label), "%s (%s)",
56 filter_ctx->name,
57 filter_ctx->filter->name);
58
59 for (j = 0; j < filter_ctx->output_count; j++) {
60 AVFilterLink *link = filter_ctx->outputs[j];
61 if (link) {
62 char dst_filter_ctx_label[128];
63 const AVFilterContext *dst_filter_ctx = link->dst;
64
65 snprintf(dst_filter_ctx_label, sizeof(dst_filter_ctx_label),
66 "%s (%s)",
67 dst_filter_ctx->name,
68 dst_filter_ctx->filter->name);
69
70 fprintf(outfile, "\"%s\" -> \"%s\"",
71 filter_ctx_label, dst_filter_ctx_label);
72 if (link->type == AVMEDIA_TYPE_VIDEO) {
73 fprintf(outfile,
74 " [ label= \"fmt:%s w:%d h:%d tb:%d/%d\" ]",
75 av_pix_fmt_descriptors[link->format].name,
76 link->w, link->h, link->time_base.num,
77 link->time_base.den);
78 } else if (link->type == AVMEDIA_TYPE_AUDIO) {
79 char buf[255];
80 av_get_channel_layout_string(buf, sizeof(buf), -1,
81 link->channel_layout);
82 fprintf(outfile,
83 " [ label= \"fmt:%s sr:%"PRId64 " cl:%s\" ]",
84 av_get_sample_fmt_name(link->format),
85 link->sample_rate, buf);
86 }
87 fprintf(outfile, ";\n");
88 }
89 }
90 }
91 fprintf(outfile, "}\n");
92 }
93
94 int main(int argc, char **argv)
95 {
96 const char *outfilename = NULL;
97 const char *infilename = NULL;
98 FILE *outfile = NULL;
99 FILE *infile = NULL;
100 char *graph_string = NULL;
101 AVFilterGraph *graph = av_mallocz(sizeof(AVFilterGraph));
102 char c;
103
104 av_log_set_level(AV_LOG_DEBUG);
105
106 while ((c = getopt(argc, argv, "hi:o:")) != -1) {
107 switch (c) {
108 case 'h':
109 usage();
110 return 0;
111 case 'i':
112 infilename = optarg;
113 break;
114 case 'o':
115 outfilename = optarg;
116 break;
117 case '?':
118 return 1;
119 }
120 }
121
122 if (!infilename || !strcmp(infilename, "-"))
123 infilename = "/dev/stdin";
124 infile = fopen(infilename, "r");
125 if (!infile) {
126 fprintf(stderr, "Impossible to open input file '%s': %s\n",
127 infilename, strerror(errno));
128 return 1;
129 }
130
131 if (!outfilename || !strcmp(outfilename, "-"))
132 outfilename = "/dev/stdout";
133 outfile = fopen(outfilename, "w");
134 if (!outfile) {
135 fprintf(stderr, "Impossible to open output file '%s': %s\n",
136 outfilename, strerror(errno));
137 return 1;
138 }
139
140 /* read from infile and put it in a buffer */
141 {
142 unsigned int count = 0;
143 struct line *line, *last_line, *first_line;
144 char *p;
145 last_line = first_line = av_malloc(sizeof(struct line));
146
147 while (fgets(last_line->data, sizeof(last_line->data), infile)) {
148 struct line *new_line = av_malloc(sizeof(struct line));
149 count += strlen(last_line->data);
150 last_line->next = new_line;
151 last_line = new_line;
152 }
153 last_line->next = NULL;
154
155 graph_string = av_malloc(count + 1);
156 p = graph_string;
157 for (line = first_line; line->next; line = line->next) {
158 unsigned int l = strlen(line->data);
159 memcpy(p, line->data, l);
160 p += l;
161 }
162 *p = '\0';
163 }
164
165 avfilter_register_all();
166
167 if (avfilter_graph_parse(graph, graph_string, NULL, NULL, NULL) < 0) {
168 fprintf(stderr, "Impossible to parse the graph description\n");
169 return 1;
170 }
171
172 if (avfilter_graph_config(graph, NULL) < 0)
173 return 1;
174
175 print_digraph(outfile, graph);
176 fflush(outfile);
177
178 return 0;
179 }