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 "PipeOutputPlugin.hxx"
#include "../OutputAPI.hxx"
#include "../Wrapper.hxx"
#include "config/ConfigError.hxx"
#include "util/Error.hxx"
#include "util/Domain.hxx"
#include <string>
#include <stdio.h>
class PipeOutput {
friend struct AudioOutputWrapper<PipeOutput>;
AudioOutput base;
std::string cmd;
FILE *fh;
PipeOutput()
:base(pipe_output_plugin) {}
bool Configure(const config_param ¶m, Error &error);
public:
static PipeOutput *Create(const config_param ¶m, Error &error);
bool Open(AudioFormat &audio_format, Error &error);
void Close() {
pclose(fh);
}
size_t Play(const void *chunk, size_t size, Error &error);
};
static constexpr Domain pipe_output_domain("pipe_output");
inline bool
PipeOutput::Configure(const config_param ¶m, Error &error)
{
if (!base.Configure(param, error))
return false;
cmd = param.GetBlockValue("command", "");
if (cmd.empty()) {
error.Set(config_domain,
"No \"command\" parameter specified");
return false;
}
return true;
}
inline PipeOutput *
PipeOutput::Create(const config_param ¶m, Error &error)
{
PipeOutput *po = new PipeOutput();
if (!po->Configure(param, error)) {
delete po;
return nullptr;
}
return po;
}
inline bool
PipeOutput::Open(gcc_unused AudioFormat &audio_format, Error &error)
{
fh = popen(cmd.c_str(), "w");
if (fh == nullptr) {
error.FormatErrno("Error opening pipe \"%s\"",
cmd.c_str());
return false;
}
return true;
}
inline size_t
PipeOutput::Play(const void *chunk, size_t size, Error &error)
{
size_t nbytes = fwrite(chunk, 1, size, fh);
if (nbytes == 0)
error.SetErrno("Write error on pipe");
return nbytes;
}
typedef AudioOutputWrapper<PipeOutput> Wrapper;
const struct AudioOutputPlugin pipe_output_plugin = {
"pipe",
nullptr,
&Wrapper::Init,
&Wrapper::Finish,
nullptr,
nullptr,
&Wrapper::Open,
&Wrapper::Close,
nullptr,
nullptr,
&Wrapper::Play,
nullptr,
nullptr,
nullptr,
nullptr,
};
|
