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/****************************************************************************
**
** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/
**
** This file is part of the demonstration applications of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** This file may be used under the terms of the GNU Lesser General Public
** License version 2.1 as published by the Free Software Foundation and
** appearing in the file LICENSE.LGPL included in the packaging of this
** file. Please review the following information to ensure the GNU Lesser
** General Public License version 2.1 requirements will be met:
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU General
** Public License version 3.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of this
** file. Please review the following information to ensure the GNU General
** Public License version 3.0 requirements will be met:
** http://www.gnu.org/copyleft/gpl.html.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include <QtCore/qstring.h>
#include <QAudioOutput>
#include "GEAudioOut.h"
using namespace GE;
//using namespace QTM_NAMESPACE;
/*
#ifndef Q_OS_WIN32
QTM_USE_NAMESPACE
#endif
*/
const int CHANNELS = 2;
const QString CODEC = "audio/pcm";
const QAudioFormat::Endian BYTEORDER = QAudioFormat::LittleEndian;
const QAudioFormat::SampleType SAMTYPE = QAudioFormat::SignedInt;
AudioOut::AudioOut( QObject *parent, GE::IAudioSource *source ) : QThread(parent) { // qobject
m_source = source;
QAudioFormat format;
format.setFrequency(AUDIO_FREQUENCY);
format.setChannels(CHANNELS);
format.setSampleSize(AUDIO_SAMPLE_BITS);
format.setCodec(CODEC);
format.setByteOrder(BYTEORDER);
format.setSampleType(SAMTYPE);
QAudioDeviceInfo info(QAudioDeviceInfo::defaultOutputDevice());
if (!info.isFormatSupported(format))
format = info.nearestFormat(format);
m_audioOutput = new QAudioOutput(info,format);
#ifdef Q_WS_MAEMO_5
m_audioOutput->setBufferSize(20000);
m_sendBufferSize = 5000;
#else
m_audioOutput->setBufferSize(16000);
m_sendBufferSize = 4000;
#endif
m_outTarget = m_audioOutput->start();
m_sendBuffer = new AUDIO_SAMPLE_TYPE[ m_sendBufferSize ];
m_samplesMixed = 0;
m_runstate=0;
#ifndef Q_OS_SYMBIAN
start();
#else
m_audioOutput->setNotifyInterval(5);
connect(m_audioOutput,SIGNAL(notify()),SLOT(audioNotify()));
#endif
};
AudioOut::~AudioOut() {
if (m_runstate==0) m_runstate = 1;
if (QThread::isRunning() == false) m_runstate = 2;
while (m_runstate!=2) { msleep(50); } // wait until the thread is finished
m_audioOutput->stop();
delete m_audioOutput;
delete [] m_sendBuffer;
};
void AudioOut::audioNotify() {
tick();
};
void AudioOut::tick() {
// fill data to buffer as much as free space is available..
int samplesToWrite = m_audioOutput->bytesFree() / (CHANNELS*AUDIO_SAMPLE_BITS/8);
samplesToWrite*=2;
if (samplesToWrite > m_sendBufferSize) samplesToWrite = m_sendBufferSize;
if (samplesToWrite<=0) return;
int mixedSamples = m_source->pullAudio( m_sendBuffer, samplesToWrite );
m_outTarget->write( (char*)m_sendBuffer, mixedSamples*2 );
};
void AudioOut::run() {
if (!m_source) { m_runstate=2; return; }
int sleepTime = m_sendBufferSize * 340 / AUDIO_FREQUENCY;
if (sleepTime<2) sleepTime = 2;
while (m_runstate==0) {
tick();
msleep(sleepTime);
};
m_runstate = 2;
};
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