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2ba45a60 DM |
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 | ||
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 | ||
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 | link->srcpad->name, link->dstpad->name); | |
83 | ||
84 | if (link->type == AVMEDIA_TYPE_VIDEO) { | |
85 | const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(link->format); | |
86 | fprintf(outfile, | |
87 | "fmt:%s w:%d h:%d tb:%d/%d", | |
88 | desc->name, | |
89 | link->w, link->h, | |
90 | link->time_base.num, link->time_base.den); | |
91 | } else if (link->type == AVMEDIA_TYPE_AUDIO) { | |
92 | char buf[255]; | |
93 | av_get_channel_layout_string(buf, sizeof(buf), -1, | |
94 | link->channel_layout); | |
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 | ||
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 = av_mallocz(sizeof(AVFilterGraph)); | |
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 | unsigned int count = 0; | |
157 | struct line *line, *last_line, *first_line; | |
158 | char *p; | |
159 | last_line = first_line = av_malloc(sizeof(struct line)); | |
160 | ||
161 | while (fgets(last_line->data, sizeof(last_line->data), infile)) { | |
162 | struct line *new_line = av_malloc(sizeof(struct line)); | |
163 | count += strlen(last_line->data); | |
164 | last_line->next = new_line; | |
165 | last_line = new_line; | |
166 | } | |
167 | last_line->next = NULL; | |
168 | ||
169 | graph_string = av_malloc(count + 1); | |
170 | p = graph_string; | |
171 | for (line = first_line; line->next; line = line->next) { | |
172 | unsigned int l = strlen(line->data); | |
173 | memcpy(p, line->data, l); | |
174 | p += l; | |
175 | } | |
176 | *p = '\0'; | |
177 | } | |
178 | ||
179 | avfilter_register_all(); | |
180 | ||
181 | if (avfilter_graph_parse(graph, graph_string, NULL, NULL, NULL) < 0) { | |
182 | fprintf(stderr, "Failed to parse the graph description\n"); | |
183 | return 1; | |
184 | } | |
185 | ||
186 | if (avfilter_graph_config(graph, NULL) < 0) | |
187 | return 1; | |
188 | ||
189 | print_digraph(outfile, graph); | |
190 | fflush(outfile); | |
191 | ||
192 | return 0; | |
193 | } |