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
|
/*
* Copyright (C) 2003-2013 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.
*/
#include "config.h"
#include "AutoConvertFilterPlugin.hxx"
#include "ConvertFilterPlugin.hxx"
#include "FilterPlugin.hxx"
#include "FilterInternal.hxx"
#include "FilterRegistry.hxx"
#include "audio_format.h"
#include <assert.h>
class AutoConvertFilter final : public Filter {
/**
* The audio format being fed to the underlying filter. This
* plugin actually doesn't need this variable, we have it here
* just so our open() method doesn't return a stack pointer.
*/
audio_format child_audio_format;
/**
* The underlying filter.
*/
Filter *filter;
/**
* A convert_filter, just in case conversion is needed. nullptr
* if unused.
*/
Filter *convert;
public:
AutoConvertFilter(Filter *_filter):filter(_filter) {}
~AutoConvertFilter() {
delete filter;
}
virtual const audio_format *Open(audio_format &af, GError **error_r);
virtual void Close();
virtual const void *FilterPCM(const void *src, size_t src_size,
size_t *dest_size_r, GError **error_r);
};
const struct audio_format *
AutoConvertFilter::Open(audio_format &in_audio_format, GError **error_r)
{
assert(audio_format_valid(&in_audio_format));
/* open the "real" filter */
child_audio_format = in_audio_format;
const audio_format *out_audio_format =
filter->Open(child_audio_format, error_r);
if (out_audio_format == nullptr)
return nullptr;
/* need to convert? */
if (!audio_format_equals(&child_audio_format, &in_audio_format)) {
/* yes - create a convert_filter */
convert = filter_new(&convert_filter_plugin, nullptr, error_r);
if (convert == nullptr) {
filter->Close();
return nullptr;
}
audio_format audio_format2 = in_audio_format;
const audio_format *audio_format3 =
convert->Open(audio_format2, error_r);
if (audio_format3 == nullptr) {
delete convert;
filter->Close();
return nullptr;
}
assert(audio_format_equals(&audio_format2, &in_audio_format));
convert_filter_set(convert, child_audio_format);
} else
/* no */
convert = nullptr;
return out_audio_format;
}
void
AutoConvertFilter::Close()
{
if (convert != nullptr) {
convert->Close();
delete convert;
}
filter->Close();
}
const void *
AutoConvertFilter::FilterPCM(const void *src, size_t src_size,
size_t *dest_size_r, GError **error_r)
{
if (convert != nullptr) {
src = convert->FilterPCM(src, src_size, &src_size, error_r);
if (src == nullptr)
return nullptr;
}
return filter->FilterPCM(src, src_size, dest_size_r, error_r);
}
Filter *
autoconvert_filter_new(Filter *filter)
{
return new AutoConvertFilter(filter);
}
|
