2 * Copyright (c) 2009 Stefano Sabatini
4 * This file is part of Libav.
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.
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.
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
21 #include "libavformat/avformat.h"
22 #include "libavutil/pixdesc.h"
23 #include "libavfilter/avfilter.h"
25 int main(int argc, char **argv)
28 AVFilterContext *filter_ctx;
29 const char *filter_name;
30 const char *filter_args = NULL;
33 av_log_set_level(AV_LOG_DEBUG);
36 fprintf(stderr, "Missing filter name as argument\n");
40 filter_name = argv[1];
42 filter_args = argv[2];
44 avfilter_register_all();
46 /* get a corresponding filter and open it */
47 if (!(filter = avfilter_get_by_name(filter_name))) {
48 fprintf(stderr, "Unrecognized filter with name '%s'\n", filter_name);
52 if (avfilter_open(&filter_ctx, filter, NULL) < 0) {
53 fprintf(stderr, "Inpossible to open filter with name '%s'\n", filter_name);
56 if (avfilter_init_filter(filter_ctx, filter_args, NULL) < 0) {
57 fprintf(stderr, "Impossible to init filter '%s' with arguments '%s'\n", filter_name, filter_args);
61 /* create a link for each of the input pads */
62 for (i = 0; i < filter_ctx->input_count; i++) {
63 AVFilterLink *link = av_mallocz(sizeof(AVFilterLink));
64 link->type = filter_ctx->filter->inputs[i].type;
65 filter_ctx->inputs[i] = link;
67 for (i = 0; i < filter_ctx->output_count; i++) {
68 AVFilterLink *link = av_mallocz(sizeof(AVFilterLink));
69 link->type = filter_ctx->filter->outputs[i].type;
70 filter_ctx->outputs[i] = link;
73 if (filter->query_formats)
74 filter->query_formats(filter_ctx);
76 avfilter_default_query_formats(filter_ctx);
78 /* print the supported formats in input */
79 for (i = 0; i < filter_ctx->input_count; i++) {
80 AVFilterFormats *fmts = filter_ctx->inputs[i]->out_formats;
81 for (j = 0; j < fmts->format_count; j++)
82 printf("INPUT[%d] %s: %s\n",
83 i, filter_ctx->filter->inputs[i].name,
84 av_pix_fmt_descriptors[fmts->formats[j]].name);
87 /* print the supported formats in output */
88 for (i = 0; i < filter_ctx->output_count; i++) {
89 AVFilterFormats *fmts = filter_ctx->outputs[i]->in_formats;
90 for (j = 0; j < fmts->format_count; j++)
91 printf("OUTPUT[%d] %s: %s\n",
92 i, filter_ctx->filter->outputs[i].name,
93 av_pix_fmt_descriptors[fmts->formats[j]].name);
96 avfilter_free(filter_ctx);