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
205
206
207
208
209
210
211
212
213
214
215
216
217
|
/* $Id$ */
/***
This file is part of polypaudio.
polypaudio 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.
polypaudio 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 polypaudio; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
USA.
***/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <unistd.h>
#include <assert.h>
#include <string.h>
#include <errno.h>
#include <sys/types.h>
#include <regex.h>
#include <stdio.h>
#include <stdlib.h>
#include "module.h"
#include "util.h"
#include "modargs.h"
#include "log.h"
#include "subscribe.h"
#include "xmalloc.h"
#include "sink-input.h"
PA_MODULE_AUTHOR("Lennart Poettering")
PA_MODULE_DESCRIPTION("Sink input matching module")
PA_MODULE_USAGE("table=<filename>")
PA_MODULE_VERSION(PACKAGE_VERSION)
#define WHITESPACE "\n\r \t"
static const char* const valid_modargs[] = {
"table",
NULL,
};
struct rule {
regex_t regex;
pa_volume_t volume;
struct rule *next;
};
struct userdata {
struct rule *rules;
struct pa_subscription *subscription;
};
static int load_rules(struct userdata *u, const char *filename) {
FILE *f;
int n = 0;
int ret = -1;
struct rule *end = NULL;
if (!(f = fopen(filename, "r"))) {
pa_log(__FILE__": failed to open file '%s': %s\n", filename, strerror(errno));
goto finish;
}
while (!feof(f)) {
char *d, *v, *e = NULL;
pa_volume_t volume;
regex_t regex;
char ln[256];
struct rule *rule;
if (!fgets(ln, sizeof(ln), f))
break;
n++;
pa_strip_nl(ln);
if (ln[0] == '#' || !*ln )
continue;
d = ln+strcspn(ln, WHITESPACE);
v = d+strspn(d, WHITESPACE);
if (!*v) {
pa_log(__FILE__ ": [%s:%u] failed to parse line - too few words\n", filename, n);
goto finish;
}
*d = 0;
volume = (pa_volume_t) strtol(v, &e, 0);
if (!e || *e) {
pa_log(__FILE__": [%s:%u] failed to parse volume\n", filename, n);
goto finish;
}
if (regcomp(®ex, ln, REG_EXTENDED|REG_NOSUB) != 0) {
pa_log(__FILE__": [%s:%u] invalid regular expression\n", filename, n);
goto finish;
}
rule = pa_xmalloc(sizeof(struct rule));
rule->regex = regex;
rule->volume = volume;
rule->next = NULL;
if (end)
end->next = rule;
else
u->rules = rule;
end = rule;
*d = 0;
}
ret = 0;
finish:
if (f)
fclose(f);
return ret;
}
static void callback(struct pa_core *c, enum pa_subscription_event_type t, uint32_t index, void *userdata) {
struct userdata *u = userdata;
struct pa_sink_input *si;
struct rule *r;
assert(c && u);
if (t != (PA_SUBSCRIPTION_EVENT_SINK_INPUT|PA_SUBSCRIPTION_EVENT_NEW))
return;
if (!(si = pa_idxset_get_by_index(c->sink_inputs, index))) {
pa_log(__FILE__": WARNING: failed to get sink input\n");
return;
}
if (!si->name)
return;
for (r = u->rules; r; r = r->next) {
if (!regexec(&r->regex, si->name, 0, NULL, 0)) {
pa_log(__FILE__": changing volume of sink input '%s' to 0x%03x\n", si->name, r->volume);
pa_sink_input_set_volume(si, r->volume);
}
}
}
int pa__init(struct pa_core *c, struct pa_module*m) {
struct pa_modargs *ma = NULL;
int ret = -1;
const char *table_file;
struct userdata *u;
assert(c && m);
if (!(ma = pa_modargs_new(m->argument, valid_modargs)) ||
!(table_file = pa_modargs_get_value(ma, "table", NULL))) {
pa_log(__FILE__": Failed to parse module arguments\n");
goto finish;
}
u = pa_xmalloc(sizeof(struct userdata));
u->rules = NULL;
u->subscription = NULL;
if (load_rules(u, table_file) < 0)
goto finish;
u->subscription = pa_subscription_new(c, PA_SUBSCRIPTION_MASK_SINK_INPUT, callback, u);
ret = 0;
finish:
if (ma)
pa_modargs_free(ma);
return ret;
}
void pa__done(struct pa_core *c, struct pa_module*m) {
struct userdata* u;
struct rule *r, *n;
assert(c && m);
if (!(u = m->userdata))
return;
if (u->subscription)
pa_subscription_free(u->subscription);
for (r = u->rules; r; r = n) {
n = r->next;
regfree(&r->regex);
pa_xfree(r);
}
pa_xfree(u);
}
|