/*
  * Copyright (c) 2009 Stefano Sabatini
  *
  * This file is part of FFmpeg.
  *
  * FFmpeg 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.
  *
  * FFmpeg 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 FFmpeg; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
 #include "libavformat/avformat.h"
 #include "libavutil/pixdesc.h"
 #include "libavfilter/avfilter.h"
 
 int main(int argc, char **argv)
 {
     AVFilter *filter;
     AVFilterContext *filter_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];
 
     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;
     }
 

     if (avfilter_open(&filter_ctx, filter, NULL) < 0) {

         fprintf(stderr, "Inpossible to open filter with name '%s'\n", filter_name);
         return 1;
     }
     if (avfilter_init_filter(filter_ctx, filter_args, NULL) < 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->input_count; 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->output_count; 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
         avfilter_default_query_formats(filter_ctx);
 
     /* print the supported formats in input */
     for (i = 0; i < filter_ctx->input_count; i++) {
         AVFilterFormats *fmts = filter_ctx->inputs[i]->out_formats;
         for (j = 0; j < fmts->format_count; 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->output_count; i++) {
         AVFilterFormats *fmts = filter_ctx->outputs[i]->in_formats;
         for (j = 0; j < fmts->format_count; 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);

     fflush(stdout);
     return 0;
 }