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
|
/* the Music Player Daemon (MPD)
* Copyright (C) 2008 Max Kellermann <max@duempel.org>
* This project's homepage is: 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "output_thread.h"
#include "output_api.h"
#include "output_internal.h"
#include <glib.h>
#include <assert.h>
#include <stdlib.h>
#include <errno.h>
enum {
/** after a failure, wait this number of seconds before
automatically reopening the device */
REOPEN_AFTER = 10,
};
static void ao_command_finished(struct audio_output *ao)
{
assert(ao->command != AO_COMMAND_NONE);
ao->command = AO_COMMAND_NONE;
notify_signal(&audio_output_client_notify);
}
static void ao_play(struct audio_output *ao)
{
const char *data = ao->args.play.data;
size_t size = ao->args.play.size;
bool ret;
assert(size > 0);
if (!audio_format_equals(&ao->in_audio_format, &ao->out_audio_format)) {
data = pcm_convert(&ao->convert_state,
&ao->in_audio_format, data, size,
&ao->out_audio_format, &size);
/* under certain circumstances, pcm_convert() may
return an empty buffer - this condition should be
investigated further, but for now, do this check as
a workaround: */
if (data == NULL)
return;
}
ret = ao->plugin->play(ao->data, data, size);
if (!ret) {
ao->plugin->cancel(ao->data);
ao->plugin->close(ao->data);
pcm_convert_deinit(&ao->convert_state);
ao->open = false;
}
ao_command_finished(ao);
}
static void ao_pause(struct audio_output *ao)
{
ao->plugin->cancel(ao->data);
if (ao->plugin->pause != NULL) {
/* pause is supported */
ao_command_finished(ao);
do {
bool ret;
ret = ao->plugin->pause(ao->data);
if (!ret) {
ao->plugin->close(ao->data);
pcm_convert_deinit(&ao->convert_state);
ao->open = false;
}
} while (ao->command == AO_COMMAND_NONE);
} else {
/* pause is not supported - simply close the device */
ao->plugin->close(ao->data);
ao->open = false;
ao_command_finished(ao);
}
}
static gpointer audio_output_task(gpointer arg)
{
struct audio_output *ao = arg;
bool ret;
while (1) {
switch (ao->command) {
case AO_COMMAND_NONE:
break;
case AO_COMMAND_OPEN:
assert(!ao->open);
pcm_convert_init(&ao->convert_state);
ret = ao->plugin->open(ao->data,
&ao->out_audio_format);
assert(!ao->open);
if (ret == true)
ao->open = true;
else
ao->reopen_after = time(NULL) + REOPEN_AFTER;
ao_command_finished(ao);
break;
case AO_COMMAND_CLOSE:
assert(ao->open);
ao->plugin->cancel(ao->data);
ao->plugin->close(ao->data);
ao->open = false;
ao_command_finished(ao);
break;
case AO_COMMAND_PLAY:
ao_play(ao);
break;
case AO_COMMAND_PAUSE:
ao_pause(ao);
break;
case AO_COMMAND_CANCEL:
ao->plugin->cancel(ao->data);
ao_command_finished(ao);
break;
case AO_COMMAND_SEND_TAG:
ao->plugin->send_tag(ao->data, ao->args.tag);
ao_command_finished(ao);
break;
case AO_COMMAND_KILL:
ao_command_finished(ao);
return NULL;
}
notify_wait(&ao->notify);
}
}
void audio_output_thread_start(struct audio_output *ao)
{
GError *e = NULL;
assert(ao->command == AO_COMMAND_NONE);
if (!(ao->thread = g_thread_create(audio_output_task, ao, true, &e)))
g_error("Failed to spawn output task: %s\n", e->message);
}
|
