Libav 0.7.1
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00001 /* 00002 * Copyright (c) 2008-2010 Stefano Sabatini 00003 * 00004 * This file is part of Libav. 00005 * 00006 * Libav is free software; you can redistribute it and/or 00007 * modify it under the terms of the GNU Lesser General Public 00008 * License as published by the Free Software Foundation; either 00009 * version 2.1 of the License, or (at your option) any later version. 00010 * 00011 * Libav is distributed in the hope that it will be useful, 00012 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00013 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00014 * Lesser General Public License for more details. 00015 * 00016 * You should have received a copy of the GNU Lesser General Public 00017 * License along with Libav; if not, write to the Free Software 00018 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 00019 */ 00020 00021 #include <unistd.h> /* getopt */ 00022 00023 #undef HAVE_AV_CONFIG_H 00024 #include "libavutil/pixdesc.h" 00025 #include "libavutil/audioconvert.h" 00026 #include "libavfilter/avfiltergraph.h" 00027 00028 static void usage(void) 00029 { 00030 printf("Convert a libavfilter graph to a dot file\n"); 00031 printf("Usage: graph2dot [OPTIONS]\n"); 00032 printf("\n" 00033 "Options:\n" 00034 "-i INFILE set INFILE as input file, stdin if omitted\n" 00035 "-o OUTFILE set OUTFILE as output file, stdout if omitted\n" 00036 "-h print this help\n"); 00037 } 00038 00039 struct line { 00040 char data[256]; 00041 struct line *next; 00042 }; 00043 00044 static void print_digraph(FILE *outfile, AVFilterGraph *graph) 00045 { 00046 int i, j; 00047 00048 fprintf(outfile, "digraph G {\n"); 00049 fprintf(outfile, "node [shape=box]\n"); 00050 fprintf(outfile, "rankdir=LR\n"); 00051 00052 for (i = 0; i < graph->filter_count; i++) { 00053 char filter_ctx_label[128]; 00054 const AVFilterContext *filter_ctx = graph->filters[i]; 00055 00056 snprintf(filter_ctx_label, sizeof(filter_ctx_label), "%s (%s)", 00057 filter_ctx->name, 00058 filter_ctx->filter->name); 00059 00060 for (j = 0; j < filter_ctx->output_count; j++) { 00061 AVFilterLink *link = filter_ctx->outputs[j]; 00062 if (link) { 00063 char dst_filter_ctx_label[128]; 00064 const AVFilterContext *dst_filter_ctx = link->dst; 00065 00066 snprintf(dst_filter_ctx_label, sizeof(dst_filter_ctx_label), "%s (%s)", 00067 dst_filter_ctx->name, 00068 dst_filter_ctx->filter->name); 00069 00070 fprintf(outfile, "\"%s\" -> \"%s\"", filter_ctx_label, dst_filter_ctx_label); 00071 if (link->type == AVMEDIA_TYPE_VIDEO) { 00072 fprintf(outfile, " [ label= \"fmt:%s w:%d h:%d tb:%d/%d\" ]", 00073 av_pix_fmt_descriptors[link->format].name, 00074 link->w, link->h, link->time_base.num, link->time_base.den); 00075 } else if (link->type == AVMEDIA_TYPE_AUDIO) { 00076 char buf[255]; 00077 av_get_channel_layout_string(buf, sizeof(buf), -1, link->channel_layout); 00078 fprintf(outfile, " [ label= \"fmt:%s sr:%"PRId64" cl:%s\" ]", 00079 av_get_sample_fmt_name(link->format), 00080 link->sample_rate, buf); 00081 } 00082 fprintf(outfile, ";\n"); 00083 } 00084 } 00085 } 00086 fprintf(outfile, "}\n"); 00087 } 00088 00089 int main(int argc, char **argv) 00090 { 00091 const char *outfilename = NULL; 00092 const char *infilename = NULL; 00093 FILE *outfile = NULL; 00094 FILE *infile = NULL; 00095 char *graph_string = NULL; 00096 AVFilterGraph *graph = av_mallocz(sizeof(AVFilterGraph)); 00097 char c; 00098 00099 av_log_set_level(AV_LOG_DEBUG); 00100 00101 while ((c = getopt(argc, argv, "hi:o:")) != -1) { 00102 switch(c) { 00103 case 'h': 00104 usage(); 00105 return 0; 00106 case 'i': 00107 infilename = optarg; 00108 break; 00109 case 'o': 00110 outfilename = optarg; 00111 break; 00112 case '?': 00113 return 1; 00114 } 00115 } 00116 00117 if (!infilename || !strcmp(infilename, "-")) 00118 infilename = "/dev/stdin"; 00119 infile = fopen(infilename, "r"); 00120 if (!infile) { 00121 fprintf(stderr, "Impossible to open input file '%s': %s\n", infilename, strerror(errno)); 00122 return 1; 00123 } 00124 00125 if (!outfilename || !strcmp(outfilename, "-")) 00126 outfilename = "/dev/stdout"; 00127 outfile = fopen(outfilename, "w"); 00128 if (!outfile) { 00129 fprintf(stderr, "Impossible to open output file '%s': %s\n", outfilename, strerror(errno)); 00130 return 1; 00131 } 00132 00133 /* read from infile and put it in a buffer */ 00134 { 00135 unsigned int count = 0; 00136 struct line *line, *last_line, *first_line; 00137 char *p; 00138 last_line = first_line = av_malloc(sizeof(struct line)); 00139 00140 while (fgets(last_line->data, sizeof(last_line->data), infile)) { 00141 struct line *new_line = av_malloc(sizeof(struct line)); 00142 count += strlen(last_line->data); 00143 last_line->next = new_line; 00144 last_line = new_line; 00145 } 00146 last_line->next = NULL; 00147 00148 graph_string = av_malloc(count + 1); 00149 p = graph_string; 00150 for (line = first_line; line->next; line = line->next) { 00151 unsigned int l = strlen(line->data); 00152 memcpy(p, line->data, l); 00153 p += l; 00154 } 00155 *p = '\0'; 00156 } 00157 00158 avfilter_register_all(); 00159 00160 if (avfilter_graph_parse(graph, graph_string, NULL, NULL, NULL) < 0) { 00161 fprintf(stderr, "Impossible to parse the graph description\n"); 00162 return 1; 00163 } 00164 00165 if (avfilter_graph_config(graph, NULL) < 0) 00166 return 1; 00167 00168 print_digraph(outfile, graph); 00169 fflush(outfile); 00170 00171 return 0; 00172 }