tools/lavfi-showfiltfmts.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 "libavformat/avformat.h"
  22 #include "libavutil/pixdesc.h"
  23 #include "libavutil/samplefmt.h"
  24 #include "libavfilter/avfilter.h"
  25
  26 static void print_formats(AVFilterContext *filter_ctx)
  27 {
  28     int i, j;
  29
  30 #define PRINT_FMTS(inout, outin, INOUT)                                 \
  31     for (i = 0; i < filter_ctx->input_count; i++) {                     \
  32         if (filter_ctx->inout##puts[i]->type == AVMEDIA_TYPE_VIDEO) {   \
  33             AVFilterFormats *fmts =                                     \
  34                 filter_ctx->inout##puts[i]->outin##_formats;            \
  35             for (j = 0; j < fmts->format_count; j++)                    \
  36                 printf(#INOUT "PUT[%d] %s: fmt:%s\n",                   \
  37                        i, filter_ctx->filter->inout##puts[i].name,      \
  38                        av_get_pix_fmt_name(fmts->formats[j]));          \
  39         } else if (filter_ctx->inout##puts[i]->type == AVMEDIA_TYPE_AUDIO) { \
  40             AVFilterFormats *fmts;                                      \
  41                                                                         \
  42             fmts = filter_ctx->inout##puts[i]->outin##_formats;         \
  43             for (j = 0; j < fmts->format_count; j++)                    \
  44                 printf(#INOUT "PUT[%d] %s: fmt:%s\n",                   \
  45                        i, filter_ctx->filter->inout##puts[i].name,      \
  46                        av_get_sample_fmt_name(fmts->formats[j]));       \
  47                                                                         \
  48             fmts = filter_ctx->inout##puts[i]->outin##_chlayouts;       \
  49             for (j = 0; j < fmts->format_count; j++) {                  \
  50                 char buf[256];                                          \
  51                 av_get_channel_layout_string(buf, sizeof(buf), -1,      \
  52                                              fmts->formats[j]);         \
  53                 printf(#INOUT "PUT[%d] %s: chlayout:%s\n",              \
  54                        i, filter_ctx->filter->inout##puts[i].name, buf); \
  55             }                                                           \
  56                                                                         \
  57             fmts = filter_ctx->inout##puts[i]->outin##_packing;         \
  58             for (j = 0; j < fmts->format_count; j++) {                  \
  59                 printf(#INOUT "PUT[%d] %s: packing:%s\n",               \
  60                        i, filter_ctx->filter->inout##puts[i].name,      \
  61                        fmts->formats[j] == AVFILTER_PACKED ?            \
  62                                            "packed" : "planar");        \
  63             }                                                           \
  64         }                                                               \
  65     }                                                                   \
  66
  67     PRINT_FMTS(in,  out, IN);
  68     PRINT_FMTS(out, in,  OUT);
  69 }
  70
  71 int main(int argc, char **argv)
  72 {
  73     AVFilter *filter;
  74     AVFilterContext *filter_ctx;
  75     const char *filter_name;
  76     const char *filter_args = NULL;
  77     int i;
  78
  79     av_log_set_level(AV_LOG_DEBUG);
  80
  81     if (!argv[1]) {
  82         fprintf(stderr, "Missing filter name as argument\n");
  83         return 1;
  84     }
  85
  86     filter_name = argv[1];
  87     if (argv[2])
  88         filter_args = argv[2];
  89
  90     avfilter_register_all();
  91
  92     /* get a corresponding filter and open it */
  93     if (!(filter = avfilter_get_by_name(filter_name))) {
  94         fprintf(stderr, "Unrecognized filter with name '%s'\n", filter_name);
  95         return 1;
  96     }
  97
  98     if (avfilter_open(&filter_ctx, filter, NULL) < 0) {
  99         fprintf(stderr, "Inpossible to open filter with name '%s'\n", filter_name);
 100         return 1;
 101     }
 102     if (avfilter_init_filter(filter_ctx, filter_args, NULL) < 0) {
 103         fprintf(stderr, "Impossible to init filter '%s' with arguments '%s'\n", filter_name, filter_args);
 104         return 1;
 105     }
 106
 107     /* create a link for each of the input pads */
 108     for (i = 0; i < filter_ctx->input_count; i++) {
 109         AVFilterLink *link = av_mallocz(sizeof(AVFilterLink));
 110         link->type = filter_ctx->filter->inputs[i].type;
 111         filter_ctx->inputs[i] = link;
 112     }
 113     for (i = 0; i < filter_ctx->output_count; i++) {
 114         AVFilterLink *link = av_mallocz(sizeof(AVFilterLink));
 115         link->type = filter_ctx->filter->outputs[i].type;
 116         filter_ctx->outputs[i] = link;
 117     }
 118
 119     if (filter->query_formats)
 120         filter->query_formats(filter_ctx);
 121     else
 122         avfilter_default_query_formats(filter_ctx);
 123
 124     print_formats(filter_ctx);
 125
 126     avfilter_free(filter_ctx);
 127     fflush(stdout);
 128     return 0;
 129 }