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/mem.h"
24 #include "libavutil/pixdesc.h"
26 #include "libavfilter/avfilter.h"
27 #include "libavfilter/formats.h"
29 int main(int argc, char **argv)
32 AVFilterContext *filter_ctx;
33 AVFilterGraph *graph_ctx;
34 const char *filter_name;
35 const char *filter_args = NULL;
38 av_log_set_level(AV_LOG_DEBUG);
41 fprintf(stderr, "Missing filter name as argument\n");
45 filter_name = argv[1];
47 filter_args = argv[2];
50 graph_ctx = avfilter_graph_alloc();
54 avfilter_register_all();
56 /* get a corresponding filter and open it */
57 if (!(filter = avfilter_get_by_name(filter_name))) {
58 fprintf(stderr, "Unrecognized filter with name '%s'\n", filter_name);
62 /* open filter and add it to the graph */
63 if (!(filter_ctx = avfilter_graph_alloc_filter(graph_ctx, filter, filter_name))) {
64 fprintf(stderr, "Impossible to open filter with name '%s'\n",
68 if (avfilter_init_str(filter_ctx, filter_args) < 0) {
69 fprintf(stderr, "Impossible to init filter '%s' with arguments '%s'\n",
70 filter_name, filter_args);
74 /* create a link for each of the input pads */
75 for (i = 0; i < filter_ctx->nb_inputs; i++) {
76 AVFilterLink *link = av_mallocz(sizeof(AVFilterLink));
77 link->type = avfilter_pad_get_type(filter_ctx->filter->inputs, i);
78 filter_ctx->inputs[i] = link;
80 for (i = 0; i < filter_ctx->nb_outputs; i++) {
81 AVFilterLink *link = av_mallocz(sizeof(AVFilterLink));
82 link->type = avfilter_pad_get_type(filter_ctx->filter->outputs, i);
83 filter_ctx->outputs[i] = link;
86 if (filter->query_formats)
87 filter->query_formats(filter_ctx);
89 ff_default_query_formats(filter_ctx);
91 /* print the supported formats in input */
92 for (i = 0; i < filter_ctx->nb_inputs; i++) {
93 AVFilterFormats *fmts = filter_ctx->inputs[i]->out_formats;
94 for (j = 0; j < fmts->nb_formats; j++)
95 printf("INPUT[%d] %s: %s\n",
96 i, avfilter_pad_get_name(filter_ctx->filter->inputs, i),
97 av_get_pix_fmt_name(fmts->formats[j]));
100 /* print the supported formats in output */
101 for (i = 0; i < filter_ctx->nb_outputs; i++) {
102 AVFilterFormats *fmts = filter_ctx->outputs[i]->in_formats;
103 for (j = 0; j < fmts->nb_formats; j++)
104 printf("OUTPUT[%d] %s: %s\n",
105 i, avfilter_pad_get_name(filter_ctx->filter->outputs, i),
106 av_get_pix_fmt_name(fmts->formats[j]));
109 avfilter_free(filter_ctx);
110 avfilter_graph_free(&graph_ctx);