diff -r ce961d2c008b -r 6745d806c5ff qtmobility/examples/audioinput/audioinput.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/qtmobility/examples/audioinput/audioinput.cpp	Thu Jul 22 16:42:52 2010 +0100
@@ -0,0 +1,375 @@
+/****************************************************************************
+**
+** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, 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.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <stdlib.h>
+#include <math.h>
+
+#include <QDebug>
+#include <QPainter>
+#include <QVBoxLayout>
+
+#include <qaudiodeviceinfo.h>
+#include <qaudioinput.h>
+
+#include <QtCore/qendian.h>
+
+#include "audioinput.h"
+
+const QString InputTest::PushModeLabel(tr("Enable push mode"));
+const QString InputTest::PullModeLabel(tr("Enable pull mode"));
+const QString InputTest::SuspendLabel(tr("Suspend recording"));
+const QString InputTest::ResumeLabel(tr("Resume recording"));
+
+const int BufferSize = 4096;
+
+AudioInfo::AudioInfo(const QAudioFormat &format, QObject *parent)
+    :   QIODevice(parent)
+    ,   m_format(format)
+    ,   m_maxAmplitude(0)
+    ,   m_level(0.0)
+
+{
+    switch (m_format.sampleSize()) {
+    case 8:
+        switch (m_format.sampleType()) {
+        case QAudioFormat::UnSignedInt:
+            m_maxAmplitude = 255;
+            break;
+        case QAudioFormat::SignedInt:
+            m_maxAmplitude = 127;
+            break;
+        default:
+            break;
+        }
+        break;
+    case 16:
+        switch (m_format.sampleType()) {
+        case QAudioFormat::UnSignedInt:
+            m_maxAmplitude = 65535;
+            break;
+        case QAudioFormat::SignedInt:
+            m_maxAmplitude = 32767;
+            break;
+        default:
+            break;
+        }
+        break;
+    default:
+        break;
+    }
+}
+
+AudioInfo::~AudioInfo()
+{
+}
+
+void AudioInfo::start()
+{
+    open(QIODevice::WriteOnly);
+}
+
+void AudioInfo::stop()
+{
+    close();
+}
+
+qint64 AudioInfo::readData(char *data, qint64 maxlen)
+{
+    Q_UNUSED(data)
+    Q_UNUSED(maxlen)
+
+    return 0;
+}
+
+qint64 AudioInfo::writeData(const char *data, qint64 len)
+{
+    if (m_maxAmplitude) {
+        Q_ASSERT(m_format.sampleSize() % 8 == 0);
+        const int channelBytes = m_format.sampleSize() / 8;
+        const int sampleBytes = m_format.channels() * channelBytes;
+        Q_ASSERT(len % sampleBytes == 0);
+        const int numSamples = len / sampleBytes;
+
+        quint16 maxValue = 0;
+        const unsigned char *ptr = reinterpret_cast<const unsigned char *>(data);
+
+        for (int i = 0; i < numSamples; ++i) {
+            for(int j = 0; j < m_format.channels(); ++j) {
+                quint16 value = 0;
+
+                if (m_format.sampleSize() == 8 && m_format.sampleType() == QAudioFormat::UnSignedInt) {
+                    value = *reinterpret_cast<const quint8*>(ptr);
+                } else if (m_format.sampleSize() == 8 && m_format.sampleType() == QAudioFormat::SignedInt) {
+                    value = qAbs(*reinterpret_cast<const qint8*>(ptr));
+                } else if (m_format.sampleSize() == 16 && m_format.sampleType() == QAudioFormat::UnSignedInt) {
+                    if (m_format.byteOrder() == QAudioFormat::LittleEndian)
+                        value = qFromLittleEndian<quint16>(ptr);
+                    else
+                        value = qFromBigEndian<quint16>(ptr);
+                } else if (m_format.sampleSize() == 16 && m_format.sampleType() == QAudioFormat::SignedInt) {
+                    if (m_format.byteOrder() == QAudioFormat::LittleEndian)
+                        value = qAbs(qFromLittleEndian<qint16>(ptr));
+                    else
+                        value = qAbs(qFromBigEndian<qint16>(ptr));
+                }
+
+                maxValue = qMax(value, maxValue);
+                ptr += channelBytes;
+            }
+        }
+
+        maxValue = qMin(maxValue, m_maxAmplitude);
+        m_level = qreal(maxValue) / m_maxAmplitude;
+    }
+
+    emit update();
+    return len;
+}
+
+RenderArea::RenderArea(QWidget *parent)
+    : QWidget(parent)
+{
+    setBackgroundRole(QPalette::Base);
+    setAutoFillBackground(true);
+
+    m_level = 0;
+    setMinimumHeight(30);
+    setMinimumWidth(200);
+}
+
+void RenderArea::paintEvent(QPaintEvent * /* event */)
+{
+    QPainter painter(this);
+
+    painter.setPen(Qt::black);
+    painter.drawRect(QRect(painter.viewport().left()+10,
+                           painter.viewport().top()+10,
+                           painter.viewport().right()-20,
+                           painter.viewport().bottom()-20));
+    if (m_level == 0.0)
+        return;
+
+    painter.setPen(Qt::red);
+
+    int pos = ((painter.viewport().right()-20)-(painter.viewport().left()+11))*m_level;
+    for (int i = 0; i < 10; ++i) {
+        int x1 = painter.viewport().left()+11;
+        int y1 = painter.viewport().top()+10+i;
+        int x2 = painter.viewport().left()+20+pos;
+        int y2 = painter.viewport().top()+10+i;
+        if (x2 < painter.viewport().left()+10)
+            x2 = painter.viewport().left()+10;
+
+        painter.drawLine(QPoint(x1, y1),QPoint(x2, y2));
+    }
+}
+
+void RenderArea::setLevel(qreal value)
+{
+    m_level = value;
+    repaint();
+}
+
+
+InputTest::InputTest()
+    :   m_canvas(0)
+    ,   m_modeButton(0)
+    ,   m_suspendResumeButton(0)
+    ,   m_deviceBox(0)
+    ,   m_device(QAudioDeviceInfo::defaultInputDevice())
+    ,   m_audioInfo(0)
+    ,   m_audioInput(0)
+    ,   m_input(0)
+    ,   m_pullMode(false)
+    ,   m_buffer(BufferSize, 0)
+{
+    initializeWindow();
+    initializeAudio();
+}
+
+InputTest::~InputTest() {}
+
+void InputTest::initializeWindow()
+{
+    QScopedPointer<QWidget> window(new QWidget);
+    QScopedPointer<QVBoxLayout> layout(new QVBoxLayout);
+
+    m_canvas = new RenderArea(this);
+    layout->addWidget(m_canvas);
+
+    m_deviceBox = new QComboBox(this);
+    QList<QAudioDeviceInfo> devices = QAudioDeviceInfo::availableDevices(QAudio::AudioInput);
+    for(int i = 0; i < devices.size(); ++i)
+        m_deviceBox->addItem(devices.at(i).deviceName(), qVariantFromValue(devices.at(i)));
+
+    connect(m_deviceBox, SIGNAL(activated(int)), SLOT(deviceChanged(int)));
+    layout->addWidget(m_deviceBox);
+
+    m_modeButton = new QPushButton(this);
+    m_modeButton->setText(PushModeLabel);
+    connect(m_modeButton, SIGNAL(clicked()), SLOT(toggleMode()));
+    layout->addWidget(m_modeButton);
+
+    m_suspendResumeButton = new QPushButton(this);
+    m_suspendResumeButton->setText(SuspendLabel);
+    connect(m_suspendResumeButton, SIGNAL(clicked()), SLOT(toggleSuspend()));
+    layout->addWidget(m_suspendResumeButton);
+
+    window->setLayout(layout.data());
+    layout.take(); // ownership transferred
+
+    setCentralWidget(window.data());
+    QWidget *const windowPtr = window.take(); // ownership transferred
+    windowPtr->show();
+}
+
+void InputTest::initializeAudio()
+{
+    m_pullMode = true;
+
+    m_format.setFrequency(8000);
+    m_format.setChannels(1);
+    m_format.setSampleSize(16);
+    m_format.setSampleType(QAudioFormat::SignedInt);
+    m_format.setByteOrder(QAudioFormat::LittleEndian);
+    m_format.setCodec("audio/pcm");
+
+    QAudioDeviceInfo info(QAudioDeviceInfo::defaultInputDevice());
+    if (!info.isFormatSupported(m_format)) {
+        qWarning() << "Default format not supported - trying to use nearest";
+        m_format = info.nearestFormat(m_format);
+    }
+
+    m_audioInfo  = new AudioInfo(m_format, this);
+    connect(m_audioInfo, SIGNAL(update()), SLOT(refreshDisplay()));
+
+    createAudioInput();
+}
+
+void InputTest::createAudioInput()
+{
+    m_audioInput = new QAudioInput(m_device, m_format, this);
+    connect(m_audioInput, SIGNAL(notify()), SLOT(notified()));
+    connect(m_audioInput, SIGNAL(stateChanged(QAudio::State)), SLOT(stateChanged(QAudio::State)));
+    m_audioInfo->start();
+    m_audioInput->start(m_audioInfo);
+}
+
+void InputTest::notified()
+{
+    qWarning() << "bytesReady = " << m_audioInput->bytesReady()
+               << ", " << "elapsedUSecs = " <<m_audioInput->elapsedUSecs()
+               << ", " << "processedUSecs = "<<m_audioInput->processedUSecs();
+}
+
+void InputTest::readMore()
+{
+    if(!m_audioInput)
+        return;
+    qint64 len = m_audioInput->bytesReady();
+    if(len > 4096)
+        len = 4096;
+    qint64 l = m_input->read(m_buffer.data(), len);
+    if(l > 0) {
+        m_audioInfo->write(m_buffer.constData(), l);
+    }
+}
+
+void InputTest::toggleMode()
+{
+    // Change bewteen pull and push modes
+    m_audioInput->stop();
+
+    if (m_pullMode) {
+        m_modeButton->setText(PullModeLabel);
+        m_input = m_audioInput->start();
+        connect(m_input, SIGNAL(readyRead()), SLOT(readMore()));
+        m_pullMode = false;
+    } else {
+        m_modeButton->setText(PushModeLabel);
+        m_pullMode = true;
+        m_audioInput->start(m_audioInfo);
+    }
+
+    m_suspendResumeButton->setText(SuspendLabel);
+}
+
+void InputTest::toggleSuspend()
+{
+    // toggle suspend/resume
+    if(m_audioInput->state() == QAudio::SuspendedState) {
+        qWarning() << "status: Suspended, resume()";
+        m_audioInput->resume();
+        m_suspendResumeButton->setText(SuspendLabel);
+    } else if (m_audioInput->state() == QAudio::ActiveState) {
+        qWarning() << "status: Active, suspend()";
+        m_audioInput->suspend();
+        m_suspendResumeButton->setText(ResumeLabel);
+    } else if (m_audioInput->state() == QAudio::StoppedState) {
+        qWarning() << "status: Stopped, resume()";
+        m_audioInput->resume();
+        m_suspendResumeButton->setText(SuspendLabel);
+    } else if (m_audioInput->state() == QAudio::IdleState) {
+        qWarning() << "status: IdleState";
+    }
+}
+
+void InputTest::stateChanged(QAudio::State state)
+{
+    qWarning() << "state = " << state;
+}
+
+void InputTest::refreshDisplay()
+{
+    m_canvas->setLevel(m_audioInfo->level());
+    m_canvas->repaint();
+}
+
+void InputTest::deviceChanged(int index)
+{
+    m_audioInfo->stop();
+    m_audioInput->stop();
+    m_audioInput->disconnect(this);
+    delete m_audioInput;
+
+    m_device = m_deviceBox->itemData(index).value<QAudioDeviceInfo>();
+    createAudioInput();
+}