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filtfmts.c
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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 
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 
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 {
74  AVFilterGraph *graph_ctx;
75  const char *filter_name;
76  const char *filter_args = NULL;
77  int i;
78 
80 
81  if (argc < 2) {
82  fprintf(stderr, "Missing filter name as argument\n");
83  return 1;
84  }
85 
86  filter_name = argv[1];
87  if (argc > 2)
88  filter_args = argv[2];
89 
90  /* allocate graph */
91  graph_ctx = avfilter_graph_alloc();
92  if (!graph_ctx)
93  return 1;
94 
96 
97  /* get a corresponding filter and open it */
98  if (!(filter = avfilter_get_by_name(filter_name))) {
99  fprintf(stderr, "Unrecognized filter with name '%s'\n", filter_name);
100  return 1;
101  }
102 
103  /* open filter and add it to the graph */
104  if (!(filter_ctx = avfilter_graph_alloc_filter(graph_ctx, filter, filter_name))) {
105  fprintf(stderr, "Impossible to open filter with name '%s'\n",
106  filter_name);
107  return 1;
108  }
109  if (avfilter_init_str(filter_ctx, filter_args) < 0) {
110  fprintf(stderr, "Impossible to init filter '%s' with arguments '%s'\n",
111  filter_name, filter_args);
112  return 1;
113  }
114 
115  /* create a link for each of the input pads */
116  for (i = 0; i < filter_ctx->nb_inputs; i++) {
117  AVFilterLink *link = av_mallocz(sizeof(AVFilterLink));
118  link->type = avfilter_pad_get_type(filter_ctx->input_pads, i);
119  filter_ctx->inputs[i] = link;
120  }
121  for (i = 0; i < filter_ctx->nb_outputs; i++) {
122  AVFilterLink *link = av_mallocz(sizeof(AVFilterLink));
123  link->type = avfilter_pad_get_type(filter_ctx->output_pads, i);
124  filter_ctx->outputs[i] = link;
125  }
126 
127  if (filter->query_formats)
128  filter->query_formats(filter_ctx);
129  else
130  ff_default_query_formats(filter_ctx);
131 
132  print_formats(filter_ctx);
133 
134  avfilter_free(filter_ctx);
135  avfilter_graph_free(&graph_ctx);
136  fflush(stdout);
137  return 0;
138 }