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
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
|
/*
* 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
*
* Internal declarations for the "httpd" audio output plugin.
*/
#ifndef MPD_OUTPUT_HTTPD_INTERNAL_H
#define MPD_OUTPUT_HTTPD_INTERNAL_H
#include "output_internal.h"
#include "timer.h"
#include "thread/Mutex.hxx"
#include "event/ServerSocket.hxx"
#include <forward_list>
struct config_param;
class EventLoop;
class ServerSocket;
class HttpdClient;
class Page;
struct HttpdOutput final : private ServerSocket {
struct audio_output base;
/**
* True if the audio output is open and accepts client
* connections.
*/
bool open;
/**
* The configured encoder plugin.
*/
struct encoder *encoder;
/**
* Number of bytes which were fed into the encoder, without
* ever receiving new output. This is used to estimate
* whether MPD should manually flush the encoder, to avoid
* buffer underruns in the client.
*/
size_t unflushed_input;
/**
* The MIME type produced by the #encoder.
*/
const char *content_type;
/**
* This mutex protects the listener socket and the client
* list.
*/
mutable Mutex mutex;
/**
* A #timer object to synchronize this output with the
* wallclock.
*/
struct timer *timer;
/**
* The header page, which is sent to every client on connect.
*/
Page *header;
/**
* The metadata, which is sent to every client.
*/
Page *metadata;
/**
* The configured name.
*/
char const *name;
/**
* The configured genre.
*/
char const *genre;
/**
* The configured website address.
*/
char const *website;
/**
* A linked list containing all clients which are currently
* connected.
*/
std::forward_list<HttpdClient> clients;
/**
* A temporary buffer for the httpd_output_read_page()
* function.
*/
char buffer[32768];
/**
* The maximum and current number of clients connected
* at the same time.
*/
guint clients_max, clients_cnt;
HttpdOutput(EventLoop &_loop);
~HttpdOutput();
bool Configure(const config_param *param, GError **error_r);
bool Bind(GError **error_r);
void Unbind();
/**
* Caller must lock the mutex.
*/
bool OpenEncoder(struct audio_format *audio_format,
GError **error_r);
/**
* Caller must lock the mutex.
*/
bool Open(struct audio_format *audio_format, GError **error_r);
/**
* Caller must lock the mutex.
*/
void Close();
/**
* Check whether there is at least one client.
*
* Caller must lock the mutex.
*/
gcc_pure
bool HasClients() const {
return !clients.empty();
}
/**
* Check whether there is at least one client.
*/
gcc_pure
bool LockHasClients() const {
const ScopeLock protect(mutex);
return HasClients();
}
void AddClient(int fd);
/**
* Removes a client from the httpd_output.clients linked list.
*/
void RemoveClient(HttpdClient &client);
/**
* Sends the encoder header to the client. This is called
* right after the response headers have been sent.
*/
void SendHeader(HttpdClient &client) const;
/**
* Reads data from the encoder (as much as available) and
* returns it as a new #page object.
*/
Page *ReadPage();
/**
* Broadcasts a page struct to all clients.
*
* Mutext must not be locked.
*/
void BroadcastPage(Page *page);
/**
* Broadcasts data from the encoder to all clients.
*/
void BroadcastFromEncoder();
bool EncodeAndPlay(const void *chunk, size_t size, GError **error_r);
void SendTag(const struct tag *tag);
private:
virtual void OnAccept(int fd, const sockaddr &address,
size_t address_length, int uid) override;
};
#endif
|
