113 lines
3.6 KiB
C
113 lines
3.6 KiB
C
/*
|
|
* 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 "libavformat/avformat.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;
|
|
|
|
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));
|
|
link->type = filter_ctx->filter->inputs[i].type;
|
|
filter_ctx->inputs[i] = link;
|
|
}
|
|
for (i = 0; i < filter_ctx->nb_outputs; i++) {
|
|
AVFilterLink *link = av_mallocz(sizeof(AVFilterLink));
|
|
link->type = filter_ctx->filter->outputs[i].type;
|
|
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, filter_ctx->filter->inputs[i].name,
|
|
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, filter_ctx->filter->outputs[i].name,
|
|
av_get_pix_fmt_name(fmts->formats[j]));
|
|
}
|
|
|
|
avfilter_free(filter_ctx);
|
|
avfilter_graph_free(&graph_ctx);
|
|
fflush(stdout);
|
|
return 0;
|
|
}
|