--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/qtmobility/examples/audioinput/audioinput.cpp Wed Jun 23 19:08:38 2010 +0300
@@ -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();
+}