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
23 #include "libavutil/pixdesc.h"
24 #include "libavfilter/avfilter.h"
25 #include "libavfilter/formats.h"
27 int main(int argc, char **argv)
30 AVFilterContext *filter_ctx;
31 AVFilterGraph *graph_ctx;
32 const char *filter_name;
33 const char *filter_args = NULL;
36 av_log_set_level(AV_LOG_DEBUG);
39 fprintf(stderr, "Missing filter name as argument\n");
43 filter_name = argv[1];
45 filter_args = argv[2];
48 graph_ctx = avfilter_graph_alloc();
52 avfilter_register_all();
54 /* get a corresponding filter and open it */
55 if (!(filter = avfilter_get_by_name(filter_name))) {
56 fprintf(stderr, "Unrecognized filter with name '%s'\n", filter_name);
60 /* open filter and add it to the graph */
61 if (!(filter_ctx = avfilter_graph_alloc_filter(graph_ctx, filter, filter_name))) {
62 fprintf(stderr, "Impossible to open filter with name '%s'\n",
66 if (avfilter_init_str(filter_ctx, filter_args) < 0) {
67 fprintf(stderr, "Impossible to init filter '%s' with arguments '%s'\n",
68 filter_name, filter_args);
72 /* create a link for each of the input pads */
73 for (i = 0; i < filter_ctx->nb_inputs; i++) {
74 AVFilterLink *link = av_mallocz(sizeof(AVFilterLink));
75 link->type = filter_ctx->filter->inputs[i].type;
76 filter_ctx->inputs[i] = link;
78 for (i = 0; i < filter_ctx->nb_outputs; i++) {
79 AVFilterLink *link = av_mallocz(sizeof(AVFilterLink));
80 link->type = filter_ctx->filter->outputs[i].type;
81 filter_ctx->outputs[i] = link;
84 if (filter->query_formats)
85 filter->query_formats(filter_ctx);
87 ff_default_query_formats(filter_ctx);
89 /* print the supported formats in input */
90 for (i = 0; i < filter_ctx->nb_inputs; i++) {
91 AVFilterFormats *fmts = filter_ctx->inputs[i]->out_formats;
92 for (j = 0; j < fmts->nb_formats; j++)
93 printf("INPUT[%d] %s: %s\n",
94 i, filter_ctx->filter->inputs[i].name,
95 av_get_pix_fmt_name(fmts->formats[j]));
98 /* print the supported formats in output */
99 for (i = 0; i < filter_ctx->nb_outputs; i++) {
100 AVFilterFormats *fmts = filter_ctx->outputs[i]->in_formats;
101 for (j = 0; j < fmts->nb_formats; j++)
102 printf("OUTPUT[%d] %s: %s\n",
103 i, filter_ctx->filter->outputs[i].name,
104 av_get_pix_fmt_name(fmts->formats[j]));
107 avfilter_free(filter_ctx);
108 avfilter_graph_free(&graph_ctx);