libavfilter/filtfmts.c

   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 }