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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 "libavutil/channel_layout.h"
  24. #include "libavutil/mem.h"
  25. #include "libavutil/pixdesc.h"
  26. #include "libavutil/samplefmt.h"
  27.  
  28. #include "libavfilter/avfilter.h"
  29. #include "libavfilter/formats.h"
  30.  
  31. static void print_formats(AVFilterContext *filter_ctx)
  32. {
  33.     int i, j;
  34.  
  35. #define PRINT_FMTS(inout, outin, INOUT)                                 \
  36.     for (i = 0; i < filter_ctx->nb_##inout##puts; i++) {                     \
  37.         if (filter_ctx->inout##puts[i]->type == AVMEDIA_TYPE_VIDEO) {   \
  38.             AVFilterFormats *fmts =                                     \
  39.                 filter_ctx->inout##puts[i]->outin##_formats;            \
  40.             for (j = 0; j < fmts->nb_formats; j++)                    \
  41.                 if(av_get_pix_fmt_name(fmts->formats[j]))               \
  42.                 printf(#INOUT "PUT[%d] %s: fmt:%s\n",                   \
  43.                        i, avfilter_pad_get_name(filter_ctx->inout##put_pads, i),      \
  44.                        av_get_pix_fmt_name(fmts->formats[j]));          \
  45.         } else if (filter_ctx->inout##puts[i]->type == AVMEDIA_TYPE_AUDIO) { \
  46.             AVFilterFormats *fmts;                                      \
  47.             AVFilterChannelLayouts *layouts;                            \
  48.                                                                         \
  49.             fmts = filter_ctx->inout##puts[i]->outin##_formats;         \
  50.             for (j = 0; j < fmts->nb_formats; j++)                    \
  51.                 printf(#INOUT "PUT[%d] %s: fmt:%s\n",                   \
  52.                        i, avfilter_pad_get_name(filter_ctx->inout##put_pads, i),      \
  53.                        av_get_sample_fmt_name(fmts->formats[j]));       \
  54.                                                                         \
  55.             layouts = filter_ctx->inout##puts[i]->outin##_channel_layouts; \
  56.             for (j = 0; j < layouts->nb_channel_layouts; j++) {                  \
  57.                 char buf[256];                                          \
  58.                 av_get_channel_layout_string(buf, sizeof(buf), -1,      \
  59.                                              layouts->channel_layouts[j]);         \
  60.                 printf(#INOUT "PUT[%d] %s: chlayout:%s\n",              \
  61.                        i, avfilter_pad_get_name(filter_ctx->inout##put_pads, i), buf); \
  62.             }                                                           \
  63.         }                                                               \
  64.     }                                                                   \
  65.  
  66.     PRINT_FMTS(in,  out, IN);
  67.     PRINT_FMTS(out, in,  OUT);
  68. }
  69.  
  70. int main(int argc, char **argv)
  71. {
  72.     AVFilter *filter;
  73.     AVFilterContext *filter_ctx;
  74.     AVFilterGraph *graph_ctx;
  75.     const char *filter_name;
  76.     const char *filter_args = NULL;
  77.     int i;
  78.     int ret = 0;
  79.  
  80.     av_log_set_level(AV_LOG_DEBUG);
  81.  
  82.     if (argc < 2) {
  83.         fprintf(stderr, "Missing filter name as argument\n");
  84.         return 1;
  85.     }
  86.  
  87.     filter_name = argv[1];
  88.     if (argc > 2)
  89.         filter_args = argv[2];
  90.  
  91.     /* allocate graph */
  92.     graph_ctx = avfilter_graph_alloc();
  93.     if (!graph_ctx)
  94.         return 1;
  95.  
  96.     avfilter_register_all();
  97.  
  98.     /* get a corresponding filter and open it */
  99.     if (!(filter = avfilter_get_by_name(filter_name))) {
  100.         fprintf(stderr, "Unrecognized filter with name '%s'\n", filter_name);
  101.         return 1;
  102.     }
  103.  
  104.     /* open filter and add it to the graph */
  105.     if (!(filter_ctx = avfilter_graph_alloc_filter(graph_ctx, filter, filter_name))) {
  106.         fprintf(stderr, "Impossible to open filter with name '%s'\n",
  107.                 filter_name);
  108.         return 1;
  109.     }
  110.     if (avfilter_init_str(filter_ctx, filter_args) < 0) {
  111.         fprintf(stderr, "Impossible to init filter '%s' with arguments '%s'\n",
  112.                 filter_name, filter_args);
  113.         return 1;
  114.     }
  115.  
  116.     /* create a link for each of the input pads */
  117.     for (i = 0; i < filter_ctx->nb_inputs; i++) {
  118.         AVFilterLink *link = av_mallocz(sizeof(AVFilterLink));
  119.         if (!link) {
  120.             fprintf(stderr, "Unable to allocate memory for filter input link\n");
  121.             ret = 1;
  122.             goto fail;
  123.         }
  124.         link->type = avfilter_pad_get_type(filter_ctx->input_pads, i);
  125.         filter_ctx->inputs[i] = link;
  126.     }
  127.     for (i = 0; i < filter_ctx->nb_outputs; i++) {
  128.         AVFilterLink *link = av_mallocz(sizeof(AVFilterLink));
  129.         if (!link) {
  130.             fprintf(stderr, "Unable to allocate memory for filter output link\n");
  131.             ret = 1;
  132.             goto fail;
  133.         }
  134.         link->type = avfilter_pad_get_type(filter_ctx->output_pads, i);
  135.         filter_ctx->outputs[i] = link;
  136.     }
  137.  
  138.     if (filter->query_formats)
  139.         filter->query_formats(filter_ctx);
  140.     else
  141.         ff_default_query_formats(filter_ctx);
  142.  
  143.     print_formats(filter_ctx);
  144.  
  145. fail:
  146.     avfilter_free(filter_ctx);
  147.     avfilter_graph_free(&graph_ctx);
  148.     fflush(stdout);
  149.     return ret;
  150. }
  151.