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/*
* Copyright (c) 2008-2010 Stefano Sabatini
*
* This file is part of Libav.
*
* Libav is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* Libav is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <unistd.h> /* getopt */
#include "libavutil/pixdesc.h"
#include "libavutil/audioconvert.h"
#include "libavfilter/avfiltergraph.h"
static void usage(void)
{
printf("Convert a libavfilter graph to a dot file\n");
printf("Usage: graph2dot [OPTIONS]\n");
printf("\n"
"Options:\n"
"-i INFILE set INFILE as input file, stdin if omitted\n"
"-o OUTFILE set OUTFILE as output file, stdout if omitted\n"
"-h print this help\n");
}
struct line {
char data[256];
struct line *next;
};
static void print_digraph(FILE *outfile, AVFilterGraph *graph)
{
int i, j;
fprintf(outfile, "digraph G {\n");
fprintf(outfile, "node [shape=box]\n");
fprintf(outfile, "rankdir=LR\n");
for (i = 0; i < graph->filter_count; i++) {
char filter_ctx_label[128];
const AVFilterContext *filter_ctx = graph->filters[i];
snprintf(filter_ctx_label, sizeof(filter_ctx_label), "%s (%s)",
filter_ctx->name,
filter_ctx->filter->name);
for (j = 0; j < filter_ctx->output_count; j++) {
AVFilterLink *link = filter_ctx->outputs[j];
if (link) {
char dst_filter_ctx_label[128];
const AVFilterContext *dst_filter_ctx = link->dst;
snprintf(dst_filter_ctx_label, sizeof(dst_filter_ctx_label),
"%s (%s)",
dst_filter_ctx->name,
dst_filter_ctx->filter->name);
fprintf(outfile, "\"%s\" -> \"%s\"",
filter_ctx_label, dst_filter_ctx_label);
if (link->type == AVMEDIA_TYPE_VIDEO) {
fprintf(outfile,
" [ label= \"fmt:%s w:%d h:%d tb:%d/%d\" ]",
av_pix_fmt_descriptors[link->format].name,
link->w, link->h, link->time_base.num,
link->time_base.den);
} else if (link->type == AVMEDIA_TYPE_AUDIO) {
char buf[255];
av_get_channel_layout_string(buf, sizeof(buf), -1,
link->channel_layout);
fprintf(outfile,
" [ label= \"fmt:%s sr:%d cl:%s\" ]",
av_get_sample_fmt_name(link->format),
link->sample_rate, buf);
}
fprintf(outfile, ";\n");
}
}
}
fprintf(outfile, "}\n");
}
int main(int argc, char **argv)
{
const char *outfilename = NULL;
const char *infilename = NULL;
FILE *outfile = NULL;
FILE *infile = NULL;
char *graph_string = NULL;
AVFilterGraph *graph = av_mallocz(sizeof(AVFilterGraph));
char c;
av_log_set_level(AV_LOG_DEBUG);
while ((c = getopt(argc, argv, "hi:o:")) != -1) {
switch (c) {
case 'h':
usage();
return 0;
case 'i':
infilename = optarg;
break;
case 'o':
outfilename = optarg;
break;
case '?':
return 1;
}
}
if (!infilename || !strcmp(infilename, "-"))
infilename = "/dev/stdin";
infile = fopen(infilename, "r");
if (!infile) {
fprintf(stderr, "Impossible to open input file '%s': %s\n",
infilename, strerror(errno));
return 1;
}
if (!outfilename || !strcmp(outfilename, "-"))
outfilename = "/dev/stdout";
outfile = fopen(outfilename, "w");
if (!outfile) {
fprintf(stderr, "Impossible to open output file '%s': %s\n",
outfilename, strerror(errno));
return 1;
}
/* read from infile and put it in a buffer */
{
unsigned int count = 0;
struct line *line, *last_line, *first_line;
char *p;
last_line = first_line = av_malloc(sizeof(struct line));
while (fgets(last_line->data, sizeof(last_line->data), infile)) {
struct line *new_line = av_malloc(sizeof(struct line));
count += strlen(last_line->data);
last_line->next = new_line;
last_line = new_line;
}
last_line->next = NULL;
graph_string = av_malloc(count + 1);
p = graph_string;
for (line = first_line; line->next; line = line->next) {
unsigned int l = strlen(line->data);
memcpy(p, line->data, l);
p += l;
}
*p = '\0';
}
avfilter_register_all();
if (avfilter_graph_parse(graph, graph_string, NULL, NULL, NULL) < 0) {
fprintf(stderr, "Impossible to parse the graph description\n");
return 1;
}
if (avfilter_graph_config(graph, NULL) < 0)
return 1;
print_digraph(outfile, graph);
fflush(outfile);
return 0;
}
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