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
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
|
/*
* Copyright (c) 2009 Stefano Sabatini
*
* This file is part of FFmpeg.
*
* FFmpeg 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.
*
* FFmpeg 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 FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <stdio.h>
#include "libavutil/channel_layout.h"
#include "libavutil/mem.h"
#include "libavutil/pixdesc.h"
#include "libavutil/samplefmt.h"
#include "libavfilter/avfilter.h"
#include "libavfilter/formats.h"
static void print_formats(AVFilterContext *filter_ctx)
{
int i, j;
#define PRINT_FMTS(inout, outin, INOUT) \
for (i = 0; i < filter_ctx->nb_##inout##puts; i++) { \
if (filter_ctx->inout##puts[i]->type == AVMEDIA_TYPE_VIDEO) { \
AVFilterFormats *fmts = \
filter_ctx->inout##puts[i]->outin##_formats; \
for (j = 0; j < fmts->nb_formats; j++) \
if(av_get_pix_fmt_name(fmts->formats[j])) \
printf(#INOUT "PUT[%d] %s: fmt:%s\n", \
i, avfilter_pad_get_name(filter_ctx->inout##put_pads, i), \
av_get_pix_fmt_name(fmts->formats[j])); \
} else if (filter_ctx->inout##puts[i]->type == AVMEDIA_TYPE_AUDIO) { \
AVFilterFormats *fmts; \
AVFilterChannelLayouts *layouts; \
\
fmts = filter_ctx->inout##puts[i]->outin##_formats; \
for (j = 0; j < fmts->nb_formats; j++) \
printf(#INOUT "PUT[%d] %s: fmt:%s\n", \
i, avfilter_pad_get_name(filter_ctx->inout##put_pads, i), \
av_get_sample_fmt_name(fmts->formats[j])); \
\
layouts = filter_ctx->inout##puts[i]->outin##_channel_layouts; \
for (j = 0; j < layouts->nb_channel_layouts; j++) { \
char buf[256]; \
av_get_channel_layout_string(buf, sizeof(buf), -1, \
layouts->channel_layouts[j]); \
printf(#INOUT "PUT[%d] %s: chlayout:%s\n", \
i, avfilter_pad_get_name(filter_ctx->inout##put_pads, i), buf); \
} \
} \
} \
PRINT_FMTS(in, out, IN);
PRINT_FMTS(out, in, OUT);
}
int main(int argc, char **argv)
{
AVFilter *filter;
AVFilterContext *filter_ctx;
AVFilterGraph *graph_ctx;
const char *filter_name;
const char *filter_args = NULL;
int i;
int ret = 0;
av_log_set_level(AV_LOG_DEBUG);
if (argc < 2) {
fprintf(stderr, "Missing filter name as argument\n");
return 1;
}
filter_name = argv[1];
if (argc > 2)
filter_args = argv[2];
/* allocate graph */
graph_ctx = avfilter_graph_alloc();
if (!graph_ctx)
return 1;
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;
}
/* open filter and add it to the graph */
if (!(filter_ctx = avfilter_graph_alloc_filter(graph_ctx, filter, filter_name))) {
fprintf(stderr, "Impossible to open filter with name '%s'\n",
filter_name);
return 1;
}
if (avfilter_init_str(filter_ctx, filter_args) < 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->nb_inputs; i++) {
AVFilterLink *link = av_mallocz(sizeof(AVFilterLink));
if (!link) {
fprintf(stderr, "Unable to allocate memory for filter input link\n");
ret = 1;
goto fail;
}
link->type = avfilter_pad_get_type(filter_ctx->input_pads, i);
filter_ctx->inputs[i] = link;
}
for (i = 0; i < filter_ctx->nb_outputs; i++) {
AVFilterLink *link = av_mallocz(sizeof(AVFilterLink));
if (!link) {
fprintf(stderr, "Unable to allocate memory for filter output link\n");
ret = 1;
goto fail;
}
link->type = avfilter_pad_get_type(filter_ctx->output_pads, i);
filter_ctx->outputs[i] = link;
}
if (filter->query_formats)
filter->query_formats(filter_ctx);
else
ff_default_query_formats(filter_ctx);
print_formats(filter_ctx);
fail:
avfilter_free(filter_ctx);
avfilter_graph_free(&graph_ctx);
fflush(stdout);
return ret;
}
|
