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
|
/***
This file is part of PulseAudio.
Copyright 2004-2008 Lennart Poettering
Copyright 2006 Pierre Ossman <ossman@cendio.se> for Cendio AB
PulseAudio is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published
by the Free Software Foundation; either version 2.1 of the License,
or (at your option) any later version.
PulseAudio 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 Lesser General Public License
along with PulseAudio; 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 <stdio.h>
#include <asoundlib.h>
#ifdef HAVE_VALGRIND_MEMCHECK_H
#include <valgrind/memcheck.h>
#endif
#include <pulsecore/module.h>
#include <pulsecore/modargs.h>
#include <pulsecore/log.h>
#include <pulsecore/macro.h>
#include "alsa-util.h"
#include "alsa-source.h"
#include "module-alsa-source-symdef.h"
PA_MODULE_AUTHOR("Lennart Poettering");
PA_MODULE_DESCRIPTION("ALSA Source");
PA_MODULE_VERSION(PACKAGE_VERSION);
PA_MODULE_LOAD_ONCE(FALSE);
PA_MODULE_USAGE(
"name=<name for the source, to be prefixed> "
"source_name=<name for the source> "
"source_properties=<properties for the source> "
"namereg_fail=<when false attempt to synthesise new source_name if it is already taken> "
"device=<ALSA device> "
"device_id=<ALSA card index> "
"format=<sample format> "
"rate=<sample rate> "
"alternate_rate=<alternate sample rate> "
"channels=<number of channels> "
"channel_map=<channel map> "
"fragments=<number of fragments> "
"fragment_size=<fragment size> "
"mmap=<enable memory mapping?> "
"tsched=<enable system timer based scheduling mode?> "
"tsched_buffer_size=<buffer size when using timer based scheduling> "
"tsched_buffer_watermark=<upper fill watermark> "
"ignore_dB=<ignore dB information from the device?> "
"control=<name of mixer control>"
"deferred_volume=<Synchronize software and hardware volume changes to avoid momentary jumps?> "
"deferred_volume_safety_margin=<usec adjustment depending on volume direction> "
"deferred_volume_extra_delay=<usec adjustment to HW volume changes> "
"fixed_latency_range=<disable latency range changes on overrun?>");
static const char* const valid_modargs[] = {
"name",
"source_name",
"source_properties",
"namereg_fail",
"device",
"device_id",
"format",
"rate",
"alternate_rate",
"channels",
"channel_map",
"fragments",
"fragment_size",
"mmap",
"tsched",
"tsched_buffer_size",
"tsched_buffer_watermark",
"ignore_dB",
"control",
"deferred_volume",
"deferred_volume_safety_margin",
"deferred_volume_extra_delay",
"fixed_latency_range",
NULL
};
int pa__init(pa_module*m) {
pa_modargs *ma = NULL;
pa_assert(m);
pa_alsa_refcnt_inc();
if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
pa_log("Failed to parse module arguments");
goto fail;
}
if (!(m->userdata = pa_alsa_source_new(m, ma, __FILE__, NULL, NULL)))
goto fail;
pa_modargs_free(ma);
return 0;
fail:
if (ma)
pa_modargs_free(ma);
pa__done(m);
return -1;
}
int pa__get_n_used(pa_module *m) {
pa_source *source;
pa_assert(m);
pa_assert_se(source = m->userdata);
return pa_source_linked_by(source);
}
void pa__done(pa_module*m) {
pa_source *source;
pa_assert(m);
if ((source = m->userdata))
pa_alsa_source_free(source);
pa_alsa_refcnt_dec();
}
|
