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
|
/*
Copyright (C) 2009 Grame
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.
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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <stdlib.h>
#include <stdio.h>
#include <assert.h>
#include <stdint.h>
#include "reserve.h"
#include "audio_reserve.h"
#include "jack/control.h"
#define DEVICE_MAX 2
typedef struct reserved_audio_device {
char device_name[64];
rd_device * reserved_device;
} reserved_audio_device;
static DBusConnection* gConnection = NULL;
static reserved_audio_device gReservedDevice[DEVICE_MAX];
static int gReserveCount = 0;
SERVER_EXPORT int audio_reservation_init()
{
DBusError error;
dbus_error_init(&error);
if (!(gConnection = dbus_bus_get(DBUS_BUS_SESSION, &error))) {
jack_error("Failed to connect to session bus for device reservation: %s\n", error.message);
jack_info("To bypass device reservation via session bus, set JACK_NO_AUDIO_RESERVATION=1 prior to starting jackd.\n");
return -1;
}
jack_info("audio_reservation_init");
return 0;
}
SERVER_EXPORT int audio_reservation_finish()
{
if (gConnection) {
dbus_connection_unref(gConnection);
gConnection = NULL;
jack_info("audio_reservation_finish");
}
return 0;
}
SERVER_EXPORT bool audio_acquire(const char * device_name)
{
DBusError error;
int ret;
// Open DBus connection first time
if (gReserveCount == 0) {
if (audio_reservation_init() != 0) {
return false;
}
}
assert(gReserveCount < DEVICE_MAX);
dbus_error_init(&error);
if ((ret= rd_acquire(
&gReservedDevice[gReserveCount].reserved_device,
gConnection,
device_name,
"Jack audio server",
INT32_MAX,
NULL,
&error)) < 0) {
jack_error("Failed to acquire device name : %s error : %s", device_name, (error.message ? error.message : strerror(-ret)));
dbus_error_free(&error);
return false;
}
strcpy(gReservedDevice[gReserveCount].device_name, device_name);
gReserveCount++;
jack_info("Acquire audio card %s", device_name);
return true;
}
SERVER_EXPORT void audio_release(const char * device_name)
{
int i;
// Look for corresponding reserved device
for (i = 0; i < DEVICE_MAX; i++) {
if (strcmp(gReservedDevice[i].device_name, device_name) == 0)
break;
}
if (i < DEVICE_MAX) {
jack_info("Released audio card %s", device_name);
rd_release(gReservedDevice[i].reserved_device);
} else {
jack_error("Audio card %s not found!!", device_name);
}
// Close DBus connection last time
gReserveCount--;
if (gReserveCount == 0)
audio_reservation_finish();
}
SERVER_EXPORT void audio_reserve_loop()
{
if (gConnection != NULL) {
dbus_connection_read_write_dispatch (gConnection, 200);
}
}
|