libavfilter/filtfmts.c

   1 /*
   2  * Copyright (c) 2009 Stefano Sabatini
   3  *
   4  * This file is part of Libav.
   5  *
   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.
  10  *
  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.
  15  *
  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
  19  */
  20
  21 #include <stdio.h>
  22
  23 #include "libavformat/avformat.h"
  24 #include "libavutil/pixdesc.h"
  25 #include "libavfilter/avfilter.h"
  26 #include "libavfilter/formats.h"
  27
  28 int main(int argc, char **argv)
  29 {
  30     AVFilter *filter;
  31     AVFilterContext *filter_ctx;
  32     const char *filter_name;
  33     const char *filter_args = NULL;
  34     int i, j;
  35
  36     av_log_set_level(AV_LOG_DEBUG);
  37
  38     if (!argv[1]) {
  39         fprintf(stderr, "Missing filter name as argument\n");
  40         return 1;
  41     }
  42
  43     filter_name = argv[1];
  44     if (argv[2])
  45         filter_args = argv[2];
  46
  47     avfilter_register_all();
  48
  49     /* get a corresponding filter and open it */
  50     if (!(filter = avfilter_get_by_name(filter_name))) {
  51         fprintf(stderr, "Unrecognized filter with name '%s'\n", filter_name);
  52         return 1;
  53     }
  54
  55     if (avfilter_open(&filter_ctx, filter, NULL) < 0) {
  56         fprintf(stderr, "Impossible to open filter with name '%s'\n",
  57                 filter_name);
  58         return 1;
  59     }
  60     if (avfilter_init_filter(filter_ctx, filter_args, NULL) < 0) {
  61         fprintf(stderr, "Impossible to init filter '%s' with arguments '%s'\n",
  62                 filter_name, filter_args);
  63         return 1;
  64     }
  65
  66     /* create a link for each of the input pads */
  67     for (i = 0; i < filter_ctx->input_count; i++) {
  68         AVFilterLink *link = av_mallocz(sizeof(AVFilterLink));
  69         link->type = filter_ctx->filter->inputs[i].type;
  70         filter_ctx->inputs[i] = link;
  71     }
  72     for (i = 0; i < filter_ctx->output_count; i++) {
  73         AVFilterLink *link = av_mallocz(sizeof(AVFilterLink));
  74         link->type = filter_ctx->filter->outputs[i].type;
  75         filter_ctx->outputs[i] = link;
  76     }
  77
  78     if (filter->query_formats)
  79         filter->query_formats(filter_ctx);
  80     else
  81         ff_default_query_formats(filter_ctx);
  82
  83     /* print the supported formats in input */
  84     for (i = 0; i < filter_ctx->input_count; i++) {
  85         AVFilterFormats *fmts = filter_ctx->inputs[i]->out_formats;
  86         for (j = 0; j < fmts->format_count; j++)
  87             printf("INPUT[%d] %s: %s\n",
  88                    i, filter_ctx->filter->inputs[i].name,
  89                    av_get_pix_fmt_name(fmts->formats[j]));
  90     }
  91
  92     /* print the supported formats in output */
  93     for (i = 0; i < filter_ctx->output_count; i++) {
  94         AVFilterFormats *fmts = filter_ctx->outputs[i]->in_formats;
  95         for (j = 0; j < fmts->format_count; j++)
  96             printf("OUTPUT[%d] %s: %s\n",
  97                    i, filter_ctx->filter->outputs[i].name,
  98                    av_get_pix_fmt_name(fmts->formats[j]));
  99     }
 100
 101     avfilter_free(filter_ctx);
 102     fflush(stdout);
 103     return 0;
 104 }