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
/*
* Copyright 2003-2021 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 "ProxyInputStream.hxx"
#include "tag/Tag.hxx"
#include <utility>
ProxyInputStream::ProxyInputStream(InputStreamPtr _input) noexcept
:InputStream(_input->GetURI(), _input->mutex),
input(std::move(_input))
{
assert(input);
input->SetHandler(this);
}
ProxyInputStream::~ProxyInputStream() noexcept = default;
void
ProxyInputStream::SetInput(InputStreamPtr _input) noexcept
{
assert(!input);
assert(_input);
input = std::move(_input);
input->SetHandler(this);
/* this call wakes up client threads if the new input is
ready */
CopyAttributes();
set_input_cond.notify_one();
}
void
ProxyInputStream::CopyAttributes()
{
assert(input);
if (input->IsReady()) {
if (!IsReady()) {
if (input->HasMimeType())
SetMimeType(input->GetMimeType());
size = input->KnownSize()
? input->GetSize()
: UNKNOWN_SIZE;
seekable = input->IsSeekable();
SetReady();
}
offset = input->GetOffset();
}
}
void
ProxyInputStream::Check()
{
if (input)
input->Check();
}
void
ProxyInputStream::Update() noexcept
{
if (!input)
return;
input->Update();
CopyAttributes();
}
void
ProxyInputStream::Seek(std::unique_lock<Mutex> &lock,
offset_type new_offset)
{
set_input_cond.wait(lock, [this]{ return !!input; });
input->Seek(lock, new_offset);
CopyAttributes();
}
bool
ProxyInputStream::IsEOF() const noexcept
{
return input && input->IsEOF();
}
std::unique_ptr<Tag>
ProxyInputStream::ReadTag() noexcept
{
if (!input)
return nullptr;
return input->ReadTag();
}
bool
ProxyInputStream::IsAvailable() const noexcept
{
return input && input->IsAvailable();
}
size_t
ProxyInputStream::Read(std::unique_lock<Mutex> &lock,
void *ptr, size_t read_size)
{
set_input_cond.wait(lock, [this]{ return !!input; });
size_t nbytes = input->Read(lock, ptr, read_size);
CopyAttributes();
return nbytes;
}