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
|
/***************************************************************************
* Copyright (C) 2015 by Ivan Ponomarev *
* ivantrue@gmail.com *
* *
* 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, or *
* (at your option) any later version. *
* *
* 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., *
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. *
***************************************************************************/
#include "outputqtmultimedia.h"
#include <qmmp/audioparameters.h>
#include <QMetaObject>
#include <QAudioOutput>
#include <QAudioFormat>
#include <QAudioDeviceInfo>
#include <QSettings>
#include <QDebug>
#include <unistd.h>
OutputQtMultimedia::OutputQtMultimedia() : Output(), m_buffer(NULL), m_bytes_per_second(0)
{
}
OutputQtMultimedia::~OutputQtMultimedia()
{
}
bool OutputQtMultimedia::initialize(quint32 freq, ChannelMap map, Qmmp::AudioFormat format)
{
QAudioFormat qformat;
qformat.setCodec("audio/pcm");
qformat.setSampleRate(freq);
qformat.setByteOrder(QAudioFormat::LittleEndian);
qformat.setChannelCount(map.size());
qformat.setSampleType(QAudioFormat::SignedInt);
//Size of sample representation in input data. For 24-bit is 4, high byte is ignored.
qint64 bytes_per_sample = AudioParameters::sampleSize(format);
switch (format)
{
case Qmmp::PCM_S8:
qformat.setSampleSize(8);
break;
case Qmmp::PCM_S16LE:
qformat.setSampleSize(16);
break;
case Qmmp::PCM_S24LE:
qformat.setSampleSize(24);
break;
case Qmmp::PCM_S32LE:
qformat.setSampleSize(32);
break;
default:
break;
}
if (!qformat.isValid())
return false;
const QSettings settings(Qmmp::configFile(), QSettings::IniFormat);
const QString saved_device_name = settings.value("QTMULTIMEDIA/device").toString();
m_bytes_per_second = bytes_per_sample * freq * qformat.channelCount();
QAudioDeviceInfo device_info;
if (!saved_device_name.isEmpty())
{
const QList<QAudioDeviceInfo> devices = QAudioDeviceInfo::availableDevices(QAudio::AudioOutput);
foreach (const QAudioDeviceInfo &info, devices)
{
if (info.deviceName()==saved_device_name)
{
if (info.isFormatSupported(qformat))
{
device_info = info;
break;
}
else
qDebug() << "OutputQtMultimedia: Output device: " << saved_device_name << " is not supported";
}
}
}
if (device_info.isNull())
{
device_info = QAudioDeviceInfo::defaultOutputDevice();
if (!device_info.isFormatSupported(qformat))
return false;
}
qDebug() << "OutputQtMultimedia: Using output device: " << device_info.deviceName();
m_output.reset(new QAudioOutput(device_info, qformat));
m_buffer = m_output->start();
m_control.reset(new OutputControl(m_output.data()));
configure(freq, map, format);
return true;
}
qint64 OutputQtMultimedia::latency()
{
return 0;
}
qint64 OutputQtMultimedia::writeAudio(unsigned char *data, qint64 maxSize)
{
if (!m_output->bytesFree()) {
//If the buffer is full, waiting for some bytes to be played:
//trying to play maxSize bytes, but not more than half of buffer.
usleep(qMin(maxSize, static_cast<qint64>(m_output->bufferSize() / 2)) * 1000000 / m_bytes_per_second);
}
return m_buffer->write((const char*)data, maxSize);
}
void OutputQtMultimedia::drain()
{
m_buffer->waitForBytesWritten(-1);
}
void OutputQtMultimedia::reset()
{
m_buffer->reset();
}
void OutputQtMultimedia::suspend()
{
QMetaObject::invokeMethod(m_control.data(), "suspend", Qt::QueuedConnection);
}
void OutputQtMultimedia::resume()
{
QMetaObject::invokeMethod(m_control.data(), "resume", Qt::QueuedConnection);
}
OutputControl::OutputControl(QAudioOutput *o)
{
m_output = o;
}
void OutputControl::suspend()
{
m_output->suspend();
}
void OutputControl::resume()
{
m_output->resume();
}
|
