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/*
* Copyright (c) 2009 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 <stdio.h>
#include "libavutil/mem.h"
#include "libavutil/pixdesc.h"
#include "libavfilter/avfilter.h"
#include "libavfilter/formats.h"
int main(int argc, char **argv)
{
AVFilter *filter;
AVFilterContext *filter_ctx;
AVFilterGraph *graph_ctx;
const char *filter_name;
const char *filter_args = NULL;
int i, j, ret = 0;
av_log_set_level(AV_LOG_DEBUG);
if (!argv[1]) {
fprintf(stderr, "Missing filter name as argument\n");
return 1;
}
filter_name = argv[1];
if (argv[2])
filter_args = argv[2];
/* allocate graph */
graph_ctx = avfilter_graph_alloc();
if (!graph_ctx)
return 1;
avfilter_register_all();
/* get a corresponding filter and open it */
if (!(filter = avfilter_get_by_name(filter_name))) {
fprintf(stderr, "Unrecognized filter with name '%s'\n", filter_name);
return 1;
}
/* open filter and add it to the graph */
if (!(filter_ctx = avfilter_graph_alloc_filter(graph_ctx, filter, filter_name))) {
fprintf(stderr, "Impossible to open filter with name '%s'\n",
filter_name);
return 1;
}
if (avfilter_init_str(filter_ctx, filter_args) < 0) {
fprintf(stderr, "Impossible to init filter '%s' with arguments '%s'\n",
filter_name, filter_args);
return 1;
}
/* create a link for each of the input pads */
for (i = 0; i < filter_ctx->nb_inputs; i++) {
AVFilterLink *link = av_mallocz(sizeof(AVFilterLink));
if (!link) {
fprintf(stderr, "Unable to allocate memory for filter input link\n");
ret = 1;
goto fail;
}
link->type = avfilter_pad_get_type(filter_ctx->filter->inputs, i);
filter_ctx->inputs[i] = link;
}
for (i = 0; i < filter_ctx->nb_outputs; i++) {
AVFilterLink *link = av_mallocz(sizeof(AVFilterLink));
if (!link) {
fprintf(stderr, "Unable to allocate memory for filter output link\n");
ret = 1;
goto fail;
}
link->type = avfilter_pad_get_type(filter_ctx->filter->outputs, i);
filter_ctx->outputs[i] = link;
}
if (filter->query_formats)
filter->query_formats(filter_ctx);
else
ff_default_query_formats(filter_ctx);
/* print the supported formats in input */
for (i = 0; i < filter_ctx->nb_inputs; i++) {
AVFilterFormats *fmts = filter_ctx->inputs[i]->out_formats;
for (j = 0; j < fmts->nb_formats; j++)
printf("INPUT[%d] %s: %s\n",
i, avfilter_pad_get_name(filter_ctx->filter->inputs, i),
av_get_pix_fmt_name(fmts->formats[j]));
}
/* print the supported formats in output */
for (i = 0; i < filter_ctx->nb_outputs; i++) {
AVFilterFormats *fmts = filter_ctx->outputs[i]->in_formats;
for (j = 0; j < fmts->nb_formats; j++)
printf("OUTPUT[%d] %s: %s\n",
i, avfilter_pad_get_name(filter_ctx->filter->outputs, i),
av_get_pix_fmt_name(fmts->formats[j]));
}
fail:
avfilter_free(filter_ctx);
avfilter_graph_free(&graph_ctx);
fflush(stdout);
return ret;
}
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