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
|
/*
* Copyright (C) 2003-2011 The Music Player Daemon Project
* http://www.musicpd.org
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
/** \file
*
* This filter plugin does nothing. That is not quite useful, except
* for testing the filter core, or as a template for new filter
* plugins.
*/
#include "config.h"
#include "filter_plugin.h"
#include "filter_internal.h"
#include "filter_registry.h"
#include <glib.h>
#include <assert.h>
struct null_filter {
struct filter filter;
};
static struct filter *
null_filter_init(G_GNUC_UNUSED const struct config_param *param,
G_GNUC_UNUSED GError **error_r)
{
struct null_filter *filter = g_new(struct null_filter, 1);
filter_init(&filter->filter, &null_filter_plugin);
return &filter->filter;
}
static void
null_filter_finish(struct filter *_filter)
{
struct null_filter *filter = (struct null_filter *)_filter;
g_free(filter);
}
static const struct audio_format *
null_filter_open(struct filter *_filter, struct audio_format *audio_format,
G_GNUC_UNUSED GError **error_r)
{
struct null_filter *filter = (struct null_filter *)_filter;
(void)filter;
return audio_format;
}
static void
null_filter_close(struct filter *_filter)
{
struct null_filter *filter = (struct null_filter *)_filter;
(void)filter;
}
static const void *
null_filter_filter(struct filter *_filter,
const void *src, size_t src_size,
size_t *dest_size_r, G_GNUC_UNUSED GError **error_r)
{
struct null_filter *filter = (struct null_filter *)_filter;
(void)filter;
/* return the unmodified source buffer */
*dest_size_r = src_size;
return src;
}
const struct filter_plugin null_filter_plugin = {
.name = "null",
.init = null_filter_init,
.finish = null_filter_finish,
.open = null_filter_open,
.close = null_filter_close,
.filter = null_filter_filter,
};
|
