avcodec: add a public function, avcodec_fill_audio_frame().
[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
66 snprintf(dst_filter_ctx_label, sizeof(dst_filter_ctx_label), "%s (%s)",
67 dst_filter_ctx->name,
68 dst_filter_ctx->filter->name);
69
70 fprintf(outfile, "\"%s\" -> \"%s\"", filter_ctx_label, dst_filter_ctx_label);
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71 if (link->type == AVMEDIA_TYPE_VIDEO) {
72 fprintf(outfile, " [ label= \"fmt:%s w:%d h:%d tb:%d/%d\" ]",
73 av_pix_fmt_descriptors[link->format].name,
74 link->w, link->h, link->time_base.num, link->time_base.den);
75 } else if (link->type == AVMEDIA_TYPE_AUDIO) {
76 char buf[255];
77 av_get_channel_layout_string(buf, sizeof(buf), -1, link->channel_layout);
78 fprintf(outfile, " [ label= \"fmt:%s sr:%"PRId64" cl:%s\" ]",
79 av_get_sample_fmt_name(link->format),
80 link->sample_rate, buf);
81 }
82 fprintf(outfile, ";\n");
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83 }
84 }
85 }
86 fprintf(outfile, "}\n");
87}
88
89int main(int argc, char **argv)
90{
91 const char *outfilename = NULL;
92 const char *infilename = NULL;
93 FILE *outfile = NULL;
94 FILE *infile = NULL;
95 char *graph_string = NULL;
96 AVFilterGraph *graph = av_mallocz(sizeof(AVFilterGraph));
97 char c;
98
99 av_log_set_level(AV_LOG_DEBUG);
100
101 while ((c = getopt(argc, argv, "hi:o:")) != -1) {
102 switch(c) {
103 case 'h':
104 usage();
105 return 0;
106 case 'i':
107 infilename = optarg;
108 break;
109 case 'o':
110 outfilename = optarg;
111 break;
112 case '?':
113 return 1;
114 }
115 }
116
117 if (!infilename || !strcmp(infilename, "-"))
118 infilename = "/dev/stdin";
119 infile = fopen(infilename, "r");
120 if (!infile) {
121 fprintf(stderr, "Impossible to open input file '%s': %s\n", infilename, strerror(errno));
122 return 1;
123 }
124
125 if (!outfilename || !strcmp(outfilename, "-"))
126 outfilename = "/dev/stdout";
127 outfile = fopen(outfilename, "w");
128 if (!outfile) {
129 fprintf(stderr, "Impossible to open output file '%s': %s\n", outfilename, strerror(errno));
130 return 1;
131 }
132
133 /* read from infile and put it in a buffer */
134 {
135 unsigned int count = 0;
136 struct line *line, *last_line, *first_line;
137 char *p;
138 last_line = first_line = av_malloc(sizeof(struct line));
139
140 while (fgets(last_line->data, sizeof(last_line->data), infile)) {
141 struct line *new_line = av_malloc(sizeof(struct line));
142 count += strlen(last_line->data);
143 last_line->next = new_line;
144 last_line = new_line;
145 }
146 last_line->next = NULL;
147
148 graph_string = av_malloc(count + 1);
149 p = graph_string;
150 for (line = first_line; line->next; line = line->next) {
151 unsigned int l = strlen(line->data);
152 memcpy(p, line->data, l);
153 p += l;
154 }
155 *p = '\0';
156 }
157
158 avfilter_register_all();
159
160 if (avfilter_graph_parse(graph, graph_string, NULL, NULL, NULL) < 0) {
161 fprintf(stderr, "Impossible to parse the graph description\n");
162 return 1;
163 }
164
2a24df93 165 if (avfilter_graph_config(graph, NULL) < 0)
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166 return 1;
167
168 print_digraph(outfile, graph);
169 fflush(outfile);
170
171 return 0;
172}