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#undef HAVE_AV_CONFIG_H 24#include "libavutil/pixdesc.h" 25#include "libavutil/audioconvert.h" 26#include "libavfilter/avfiltergraph.h" 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); 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"); 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 } 164 165 if (avfilter_graph_config(graph, NULL) < 0) 166 return 1; 167 168 print_digraph(outfile, graph); 169 fflush(outfile); 170 171 return 0; 172} 173