1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
|
/*
* Copyright (c) 2009 Stefano Sabatini
*
* This file is part of Libav.
*
* Libav is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* Libav is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "libavformat/avformat.h"
#include "libavutil/pixdesc.h"
#include "libavfilter/avfilter.h"
int main(int argc, char **argv)
{
AVFilter *filter;
AVFilterContext *filter_ctx;
const char *filter_name;
const char *filter_args = NULL;
int i, j;
av_log_set_level(AV_LOG_DEBUG);
if (!argv[1]) {
fprintf(stderr, "Missing filter name as argument\n");
return 1;
}
filter_name = argv[1];
if (argv[2])
filter_args = argv[2];
avfilter_register_all();
/* get a corresponding filter and open it */
if (!(filter = avfilter_get_by_name(filter_name))) {
fprintf(stderr, "Unrecognized filter with name '%s'\n", filter_name);
return 1;
}
if (avfilter_open(&filter_ctx, filter, NULL) < 0) {
fprintf(stderr, "Impossible to open filter with name '%s'\n",
filter_name);
return 1;
}
if (avfilter_init_filter(filter_ctx, filter_args, NULL) < 0) {
fprintf(stderr, "Impossible to init filter '%s' with arguments '%s'\n",
filter_name, filter_args);
return 1;
}
/* create a link for each of the input pads */
for (i = 0; i < filter_ctx->input_count; i++) {
AVFilterLink *link = av_mallocz(sizeof(AVFilterLink));
link->type = filter_ctx->filter->inputs[i].type;
filter_ctx->inputs[i] = link;
}
for (i = 0; i < filter_ctx->output_count; i++) {
AVFilterLink *link = av_mallocz(sizeof(AVFilterLink));
link->type = filter_ctx->filter->outputs[i].type;
filter_ctx->outputs[i] = link;
}
if (filter->query_formats)
filter->query_formats(filter_ctx);
else
avfilter_default_query_formats(filter_ctx);
/* print the supported formats in input */
for (i = 0; i < filter_ctx->input_count; i++) {
AVFilterFormats *fmts = filter_ctx->inputs[i]->out_formats;
for (j = 0; j < fmts->format_count; j++)
printf("INPUT[%d] %s: %s\n",
i, filter_ctx->filter->inputs[i].name,
av_pix_fmt_descriptors[fmts->formats[j]].name);
}
/* print the supported formats in output */
for (i = 0; i < filter_ctx->output_count; i++) {
AVFilterFormats *fmts = filter_ctx->outputs[i]->in_formats;
for (j = 0; j < fmts->format_count; j++)
printf("OUTPUT[%d] %s: %s\n",
i, filter_ctx->filter->outputs[i].name,
av_pix_fmt_descriptors[fmts->formats[j]].name);
}
avfilter_free(filter_ctx);
fflush(stdout);
return 0;
}
|
