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
|
/*
* Copyright (C) 2003-2015 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 "filter/FilterPlugin.hxx"
#include "filter/FilterInternal.hxx"
#include "filter/FilterRegistry.hxx"
#include "AudioFormat.hxx"
#include "config/Block.hxx"
#include "util/ConstBuffer.hxx"
#include <assert.h>
class AutoConvertFilter final : public Filter {
/**
* 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 AudioFormat Open(AudioFormat &af, Error &error) override;
virtual void Close() override;
virtual ConstBuffer<void> FilterPCM(ConstBuffer<void> src,
Error &error) override;
};
AudioFormat
AutoConvertFilter::Open(AudioFormat &in_audio_format, Error &error)
{
assert(in_audio_format.IsValid());
/* open the "real" filter */
AudioFormat child_audio_format = in_audio_format;
AudioFormat out_audio_format = filter->Open(child_audio_format, error);
if (!out_audio_format.IsDefined())
return out_audio_format;
/* need to convert? */
if (in_audio_format != child_audio_format) {
/* yes - create a convert_filter */
const ConfigBlock empty;
convert = filter_new(&convert_filter_plugin, empty, error);
if (convert == nullptr) {
filter->Close();
return AudioFormat::Undefined();
}
AudioFormat audio_format2 = in_audio_format;
AudioFormat audio_format3 =
convert->Open(audio_format2, error);
if (!audio_format3.IsDefined()) {
delete convert;
filter->Close();
return AudioFormat::Undefined();
}
assert(audio_format2 == in_audio_format);
if (!convert_filter_set(convert, child_audio_format, error)) {
delete convert;
filter->Close();
return AudioFormat::Undefined();
}
} else
/* no */
convert = nullptr;
return out_audio_format;
}
void
AutoConvertFilter::Close()
{
if (convert != nullptr) {
convert->Close();
delete convert;
}
filter->Close();
}
ConstBuffer<void>
AutoConvertFilter::FilterPCM(ConstBuffer<void> src, Error &error)
{
if (convert != nullptr) {
src = convert->FilterPCM(src, error);
if (src.IsNull())
return nullptr;
}
return filter->FilterPCM(src, error);
}
Filter *
autoconvert_filter_new(Filter *filter)
{
return new AutoConvertFilter(filter);
}
|
