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  1. /*
  2.  * Copyright (c) 2009 Stefano Sabatini
  3.  *
  4.  * This file is part of FFmpeg.
  5.  *
  6.  * FFmpeg 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.  * FFmpeg 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 FFmpeg; 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 "libavutil/samplefmt.h"
  26. #include "libavfilter/avfilter.h"
  27. #include "libavfilter/formats.h"
  28.  
  29. static void print_formats(AVFilterContext *filter_ctx)
  30. {
  31.     int i, j;
  32.  
  33. #define PRINT_FMTS(inout, outin, INOUT)                                 \
  34.     for (i = 0; i < filter_ctx->nb_##inout##puts; i++) {                     \
  35.         if (filter_ctx->inout##puts[i]->type == AVMEDIA_TYPE_VIDEO) {   \
  36.             AVFilterFormats *fmts =                                     \
  37.                 filter_ctx->inout##puts[i]->outin##_formats;            \
  38.             for (j = 0; j < fmts->nb_formats; j++)                    \
  39.                 if(av_get_pix_fmt_name(fmts->formats[j]))               \
  40.                 printf(#INOUT "PUT[%d] %s: fmt:%s\n",                   \
  41.                        i, filter_ctx->filter->inout##puts[i].name,      \
  42.                        av_get_pix_fmt_name(fmts->formats[j]));          \
  43.         } else if (filter_ctx->inout##puts[i]->type == AVMEDIA_TYPE_AUDIO) { \
  44.             AVFilterFormats *fmts;                                      \
  45.             AVFilterChannelLayouts *layouts;                            \
  46.                                                                         \
  47.             fmts = filter_ctx->inout##puts[i]->outin##_formats;         \
  48.             for (j = 0; j < fmts->nb_formats; j++)                    \
  49.                 printf(#INOUT "PUT[%d] %s: fmt:%s\n",                   \
  50.                        i, filter_ctx->filter->inout##puts[i].name,      \
  51.                        av_get_sample_fmt_name(fmts->formats[j]));       \
  52.                                                                         \
  53.             layouts = filter_ctx->inout##puts[i]->outin##_channel_layouts; \
  54.             for (j = 0; j < layouts->nb_channel_layouts; j++) {                  \
  55.                 char buf[256];                                          \
  56.                 av_get_channel_layout_string(buf, sizeof(buf), -1,      \
  57.                                              layouts->channel_layouts[j]);         \
  58.                 printf(#INOUT "PUT[%d] %s: chlayout:%s\n",              \
  59.                        i, filter_ctx->filter->inout##puts[i].name, buf); \
  60.             }                                                           \
  61.         }                                                               \
  62.     }                                                                   \
  63.  
  64.     PRINT_FMTS(in,  out, IN);
  65.     PRINT_FMTS(out, in,  OUT);
  66. }
  67.  
  68. int main(int argc, char **argv)
  69. {
  70.     AVFilter *filter;
  71.     AVFilterContext *filter_ctx;
  72.     AVFilterGraph *graph_ctx;
  73.     const char *filter_name;
  74.     const char *filter_args = NULL;
  75.     int i;
  76.  
  77.     av_log_set_level(AV_LOG_DEBUG);
  78.  
  79.     if (argc < 2) {
  80.         fprintf(stderr, "Missing filter name as argument\n");
  81.         return 1;
  82.     }
  83.  
  84.     filter_name = argv[1];
  85.     if (argc > 2)
  86.         filter_args = argv[2];
  87.  
  88.     /* allocate graph */
  89.     graph_ctx = avfilter_graph_alloc();
  90.     if (!graph_ctx)
  91.         return 1;
  92.  
  93.     avfilter_register_all();
  94.  
  95.     /* get a corresponding filter and open it */
  96.     if (!(filter = avfilter_get_by_name(filter_name))) {
  97.         fprintf(stderr, "Unrecognized filter with name '%s'\n", filter_name);
  98.         return 1;
  99.     }
  100.  
  101.     /* open filter and add it to the graph */
  102.     if (!(filter_ctx = avfilter_graph_alloc_filter(graph_ctx, filter, filter_name))) {
  103.         fprintf(stderr, "Impossible to open filter with name '%s'\n",
  104.                 filter_name);
  105.         return 1;
  106.     }
  107.     if (avfilter_init_str(filter_ctx, filter_args) < 0) {
  108.         fprintf(stderr, "Impossible to init filter '%s' with arguments '%s'\n",
  109.                 filter_name, filter_args);
  110.         return 1;
  111.     }
  112.  
  113.     /* create a link for each of the input pads */
  114.     for (i = 0; i < filter_ctx->nb_inputs; i++) {
  115.         AVFilterLink *link = av_mallocz(sizeof(AVFilterLink));
  116.         link->type = filter_ctx->filter->inputs[i].type;
  117.         filter_ctx->inputs[i] = link;
  118.     }
  119.     for (i = 0; i < filter_ctx->nb_outputs; i++) {
  120.         AVFilterLink *link = av_mallocz(sizeof(AVFilterLink));
  121.         link->type = filter_ctx->filter->outputs[i].type;
  122.         filter_ctx->outputs[i] = link;
  123.     }
  124.  
  125.     if (filter->query_formats)
  126.         filter->query_formats(filter_ctx);
  127.     else
  128.         ff_default_query_formats(filter_ctx);
  129.  
  130.     print_formats(filter_ctx);
  131.  
  132.     avfilter_free(filter_ctx);
  133.     avfilter_graph_free(&graph_ctx);
  134.     fflush(stdout);
  135.     return 0;
  136. }
  137.