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
|
/****************************************************************************
** hw_alsa_usb.c ***********************************************************
****************************************************************************
*
* routines for Sound Blaster USB audio devices accessed via ALSA hwdep
*
* Copyright (c) 2005 Clemens Ladisch <clemens@ladisch.de>
*
*/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <stdio.h>
#include <alsa/asoundlib.h>
#include "lirc_driver.h"
static const logchannel_t logchannel = LOG_DRIVER;
static int init(void);
static int deinit(void);
static int decode(struct ir_remote* remote, struct decode_ctx_t* ctx);
static char* rec(struct ir_remote* remotes);
static int drvctl_func(unsigned int cmd, void* arg);
static ir_code code, last_code;
static snd_hwdep_t* hwdep;
static struct timeval last_time;
static int repeat_flag;
const struct driver hw_alsa_usb = {
.name = "alsa_usb",
.device = "",
.features = LIRC_CAN_REC_LIRCCODE,
.send_mode = 0,
.rec_mode = LIRC_MODE_LIRCCODE,
.code_length = 8,
.init_func = init,
.deinit_func = deinit,
.open_func = default_open,
.close_func = default_close,
.send_func = NULL,
.rec_func = rec,
.decode_func = decode,
.drvctl_func = drvctl_func,
.readdata = NULL,
.api_version = 3,
.driver_version = "0.10.2",
.info = "See file://" PLUGINDOCS "/alsa-usb.html",
.device_hint = "drvctl"
};
const struct driver* hardwares[] = { &hw_alsa_usb, (const struct driver*)NULL };
static int search_devices(glob_t* glob)
{
int card, err;
snd_hwdep_info_t* info;
char name[36];
snd_hwdep_info_alloca(&info);
card = -1;
glob_t_init(glob);
while (snd_card_next(&card) >= 0 && card >= 0) {
char ctl_name[20];
snd_ctl_t* ctl;
int device;
sprintf(ctl_name, "hw:CARD=%d", card);
err = snd_ctl_open(&ctl, ctl_name, SND_CTL_NONBLOCK);
if (err < 0)
continue;
device = -1;
while (snd_ctl_hwdep_next_device(ctl, &device) >= 0 && device >= 0) {
snd_hwdep_info_set_device(info, device);
err = snd_ctl_hwdep_info(ctl, info);
if (err >= 0 &&
snd_hwdep_info_get_iface(info) == SND_HWDEP_IFACE_SB_RC) {
sprintf(name, "hw:CARD=%d,DEV=%d", card, device);
glob_t_add_path(glob, name);
}
}
snd_ctl_close(ctl);
}
return 0;
}
static int drvctl_func(unsigned int cmd, void* arg)
{
switch (cmd) {
case DRVCTL_GET_DEVICES:
return search_devices((glob_t*) arg);
case DRVCTL_FREE_DEVICES:
drv_enum_free((glob_t*) arg);
return 0;
default:
return DRV_ERR_NOT_IMPLEMENTED;
}
}
static int init(void)
{
const char* device;
snd_hwdep_info_t* info;
struct pollfd pollfd;
int err;
glob_t glob;
static char my_device[36];
device = drv.device;
if (!device || !*device) {
search_devices(&glob);
if (glob.gl_pathc == 0) {
log_error("device not found");
return 0;
}
strncpy(my_device, glob.gl_pathv[0], sizeof(my_device) - 1);
drv.device = my_device;
drv_enum_free(&glob);
}
err = snd_hwdep_open(&hwdep, device, SND_HWDEP_OPEN_READ);
if (err < 0) {
log_error("cannot open %s: %s", device, snd_strerror(err));
return 0;
}
snd_hwdep_info_alloca(&info);
err = snd_hwdep_info(hwdep, info);
if (err < 0) {
snd_hwdep_close(hwdep);
log_error("cannot get hwdep info: %s", snd_strerror(err));
return 0;
}
if (snd_hwdep_info_get_iface(info) != SND_HWDEP_IFACE_SB_RC) {
snd_hwdep_close(hwdep);
log_error("%s is not a Sound Blaster remote control device", device);
return 0;
}
err = snd_hwdep_poll_descriptors(hwdep, &pollfd, 1);
if (err < 0) {
snd_hwdep_close(hwdep);
log_error("cannot get file descriptor: %s", snd_strerror(err));
return 0;
}
if (err != 1) {
snd_hwdep_close(hwdep);
log_error("invalid number of file descriptors (%d): %s", err, snd_strerror(err));
return 0;
}
drv.fd = pollfd.fd;
return 1;
}
static int deinit(void)
{
snd_hwdep_close(hwdep);
drv.fd = -1;
return 1;
}
static char* rec(struct ir_remote* remotes)
{
unsigned char rc_code;
ssize_t size;
struct timeval current;
size = snd_hwdep_read(hwdep, &rc_code, 1);
if (size < 1)
return NULL;
gettimeofday(¤t, NULL);
last_code = code;
code = (ir_code)rc_code;
/* delay for repeating buttons is up to 320 ms */
repeat_flag = code == last_code && current.tv_sec - last_time.tv_sec <= 2
&& time_elapsed(&last_time, ¤t) <= 350000;
last_time = current;
log_trace("code: %llx", (uint64_t)code);
log_trace("repeat_flag: %d", repeat_flag);
return decode_all(remotes);
}
static int decode(struct ir_remote* remote, struct decode_ctx_t* ctx)
{
if (!map_code(remote, ctx, 0, 0, 8, code, 0, 0))
return 0;
ctx->repeat_flag = repeat_flag;
ctx->min_remaining_gap = 0;
ctx->max_remaining_gap = 0;
return 1;
}
|
