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![Andreas Cadhalpun](/assets/img/avatar_default.png)
Reviewed-by: Michael Niedermayer <michael@niedermayer.cc> Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>
207 lines
6.4 KiB
C
207 lines
6.4 KiB
C
/*
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* Copyright (c) 2008-2010 Stefano Sabatini
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "config.h"
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#if HAVE_UNISTD_H
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#include <unistd.h> /* getopt */
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#endif
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#include <stdio.h>
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#include <string.h>
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#include "libavutil/channel_layout.h"
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#include "libavutil/mem.h"
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#include "libavutil/pixdesc.h"
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#include "libavfilter/avfilter.h"
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#if !HAVE_GETOPT
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#include "compat/getopt.c"
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#endif
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static void usage(void)
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{
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printf("Convert a libavfilter graph to a dot file.\n");
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printf("Usage: graph2dot [OPTIONS]\n");
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printf("\n"
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"Options:\n"
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"-i INFILE set INFILE as input file, stdin if omitted\n"
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"-o OUTFILE set OUTFILE as output file, stdout if omitted\n"
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"-h print this help\n");
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}
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struct line {
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char data[256];
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struct line *next;
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};
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static void print_digraph(FILE *outfile, AVFilterGraph *graph)
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{
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int i, j;
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fprintf(outfile, "digraph G {\n");
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fprintf(outfile, "node [shape=box]\n");
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fprintf(outfile, "rankdir=LR\n");
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for (i = 0; i < graph->nb_filters; i++) {
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char filter_ctx_label[128];
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const AVFilterContext *filter_ctx = graph->filters[i];
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snprintf(filter_ctx_label, sizeof(filter_ctx_label), "%s\\n(%s)",
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filter_ctx->name,
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filter_ctx->filter->name);
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for (j = 0; j < filter_ctx->nb_outputs; j++) {
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AVFilterLink *link = filter_ctx->outputs[j];
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if (link) {
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char dst_filter_ctx_label[128];
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const AVFilterContext *dst_filter_ctx = link->dst;
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snprintf(dst_filter_ctx_label, sizeof(dst_filter_ctx_label),
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"%s\\n(%s)",
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dst_filter_ctx->name,
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dst_filter_ctx->filter->name);
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fprintf(outfile, "\"%s\" -> \"%s\" [ label= \"inpad:%s -> outpad:%s\\n",
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filter_ctx_label, dst_filter_ctx_label,
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avfilter_pad_get_name(link->srcpad, 0),
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avfilter_pad_get_name(link->dstpad, 0));
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if (link->type == AVMEDIA_TYPE_VIDEO) {
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const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(link->format);
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fprintf(outfile,
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"fmt:%s w:%d h:%d tb:%d/%d",
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desc->name,
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link->w, link->h,
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link->time_base.num, link->time_base.den);
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} else if (link->type == AVMEDIA_TYPE_AUDIO) {
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char buf[255];
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av_get_channel_layout_string(buf, sizeof(buf), -1,
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link->channel_layout);
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fprintf(outfile,
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"fmt:%s sr:%d cl:%s tb:%d/%d",
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av_get_sample_fmt_name(link->format),
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link->sample_rate, buf,
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link->time_base.num, link->time_base.den);
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}
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fprintf(outfile, "\" ];\n");
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}
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}
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}
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fprintf(outfile, "}\n");
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}
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int main(int argc, char **argv)
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{
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const char *outfilename = NULL;
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const char *infilename = NULL;
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FILE *outfile = NULL;
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FILE *infile = NULL;
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char *graph_string = NULL;
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AVFilterGraph *graph = av_mallocz(sizeof(AVFilterGraph));
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char c;
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av_log_set_level(AV_LOG_DEBUG);
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while ((c = getopt(argc, argv, "hi:o:")) != -1) {
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switch (c) {
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case 'h':
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usage();
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return 0;
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case 'i':
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infilename = optarg;
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break;
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case 'o':
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outfilename = optarg;
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break;
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case '?':
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return 1;
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}
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}
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if (!infilename || !strcmp(infilename, "-"))
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infilename = "/dev/stdin";
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infile = fopen(infilename, "r");
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if (!infile) {
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fprintf(stderr, "Failed to open input file '%s': %s\n",
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infilename, strerror(errno));
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return 1;
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}
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if (!outfilename || !strcmp(outfilename, "-"))
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outfilename = "/dev/stdout";
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outfile = fopen(outfilename, "w");
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if (!outfile) {
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fprintf(stderr, "Failed to open output file '%s': %s\n",
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outfilename, strerror(errno));
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return 1;
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}
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/* read from infile and put it in a buffer */
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{
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int64_t count = 0;
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struct line *line, *last_line, *first_line;
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char *p;
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last_line = first_line = av_malloc(sizeof(struct line));
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if (!last_line) {
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fprintf(stderr, "Memory allocation failure\n");
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return 1;
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}
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while (fgets(last_line->data, sizeof(last_line->data), infile)) {
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struct line *new_line = av_malloc(sizeof(struct line));
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if (!new_line) {
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fprintf(stderr, "Memory allocation failure\n");
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return 1;
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}
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count += strlen(last_line->data);
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last_line->next = new_line;
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last_line = new_line;
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}
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last_line->next = NULL;
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graph_string = av_malloc(count + 1);
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if (!graph_string) {
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fprintf(stderr, "Memory allocation failure\n");
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return 1;
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}
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p = graph_string;
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for (line = first_line; line->next; line = line->next) {
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size_t l = strlen(line->data);
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memcpy(p, line->data, l);
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p += l;
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}
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*p = '\0';
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}
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avfilter_register_all();
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if (avfilter_graph_parse(graph, graph_string, NULL, NULL, NULL) < 0) {
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fprintf(stderr, "Failed to parse the graph description\n");
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return 1;
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}
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if (avfilter_graph_config(graph, NULL) < 0)
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return 1;
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print_digraph(outfile, graph);
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fflush(outfile);
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return 0;
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}
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