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
|
// Copyright (C) 2021 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#include "qalsamediadevices_p.h"
#include "qmediadevices.h"
#include "qcameradevice_p.h"
#include "private/qalsaaudiosource_p.h"
#include "private/qalsaaudiosink_p.h"
#include "private/qalsaaudiodevice_p.h"
#include <alsa/asoundlib.h>
QT_BEGIN_NAMESPACE
QAlsaMediaDevices::QAlsaMediaDevices()
: QPlatformMediaDevices()
{
}
static QList<QAudioDevice> availableDevices(QAudioDevice::Mode mode)
{
QList<QAudioDevice> devices;
QByteArray filter;
// Create a list of all current audio devices that support mode
void **hints, **n;
char *name, *descr, *io;
bool hasDefault = false;
if(snd_device_name_hint(-1, "pcm", &hints) < 0) {
qWarning() << "no alsa devices available";
return devices;
}
n = hints;
if(mode == QAudioDevice::Input) {
filter = "Input";
} else {
filter = "Output";
}
QAlsaAudioDeviceInfo* sysdefault = nullptr;
while (*n != NULL) {
name = snd_device_name_get_hint(*n, "NAME");
if (name != 0 && qstrcmp(name, "null") != 0) {
descr = snd_device_name_get_hint(*n, "DESC");
io = snd_device_name_get_hint(*n, "IOID");
if ((descr != NULL) && ((io == NULL) || (io == filter))) {
auto *infop = new QAlsaAudioDeviceInfo(name, QString::fromUtf8(descr), mode);
devices.append(infop->create());
if (!hasDefault && strcmp(name, "default") == 0) {
infop->isDefault = true;
hasDefault = true;
}
else if (!sysdefault && !hasDefault && strcmp(name, "sysdefault") == 0) {
sysdefault = infop;
}
}
free(descr);
free(io);
}
free(name);
++n;
}
snd_device_name_free_hint(hints);
if (!hasDefault && sysdefault) {
// Make "sysdefault" the default device if there is no "default" device exists
sysdefault->isDefault = true;
hasDefault = true;
}
if (!hasDefault && devices.size() > 0) {
auto infop = new QAlsaAudioDeviceInfo("default", QString(), QAudioDevice::Output);
infop->isDefault = true;
devices.prepend(infop->create());
}
return devices;
}
QList<QAudioDevice> QAlsaMediaDevices::audioInputs() const
{
return availableDevices(QAudioDevice::Input);
}
QList<QAudioDevice> QAlsaMediaDevices::audioOutputs() const
{
return availableDevices(QAudioDevice::Output);
}
QPlatformAudioSource *QAlsaMediaDevices::createAudioSource(const QAudioDevice &deviceInfo,
QObject *parent)
{
return new QAlsaAudioSource(deviceInfo.id(), parent);
}
QPlatformAudioSink *QAlsaMediaDevices::createAudioSink(const QAudioDevice &deviceInfo,
QObject *parent)
{
return new QAlsaAudioSink(deviceInfo.id(), parent);
}
QT_END_NAMESPACE
|