Move audio and video examples into the common multimedia directory.

Brings the video examples into multimedia directory, and removes the
audio sub-directory so the directory structure is in line with the other
example categories.

Task-number: QT-667
Reviewed-by: Kurt Korbatits

1 files changed, 296 insertions, 0 deletions

diff --git a/examples/multimedia/audioinput/audioinput.cpp b/examples/multimedia/audioinput/audioinput.cpp
new file mode 100644
index 0000000..05723ae
--- /dev/null
+++ b/examples/multimedia/audioinput/audioinput.cpp
@@ -0,0 +1,296 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 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>
+#include <QAudioInput>
+#include "audioinput.h"
+
+#define BUFFER_SIZE 4096
+
+AudioInfo::AudioInfo(QObject* parent, QAudioInput* device)
+    :QIODevice( parent )
+{
+    input = device;
+
+    m_maxValue = 0;
+}
+
+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)
+{
+    int samples = len/2; // 2 bytes per sample
+    int maxAmp = 32768; // max for S16 samples
+    bool clipping = false;
+
+    m_maxValue = 0;
+
+    qint16* s = (qint16*)data;
+
+    // sample format is S16LE, only!
+
+    for(int i=0;i<samples;i++) {
+        qint16 sample = *s;
+        s++;
+        if(abs(sample) > m_maxValue) m_maxValue = abs(sample);
+    }
+    // check for clipping
+    if(m_maxValue>=(maxAmp-1)) clipping = true;
+
+    float value = ((float)m_maxValue/(float)maxAmp);
+    if(clipping) m_maxValue = 100;
+    else m_maxValue = (int)(value*100);
+
+    emit update();
+
+    return len;
+}
+
+int AudioInfo::LinearMax()
+{
+    return m_maxValue;
+}
+
+RenderArea::RenderArea(QWidget *parent)
+    : QWidget(parent)
+{
+    setBackgroundRole(QPalette::Base);
+    setAutoFillBackground(true);
+
+    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(level == 0)
+        return;
+
+    painter.setPen(Qt::red);
+
+    int pos = ((painter.viewport().right()-20)-(painter.viewport().left()+11))*level/100;
+    int x1,y1,x2,y2;
+    for(int i=0;i<10;i++) {
+        x1 = painter.viewport().left()+11;
+        y1 = painter.viewport().top()+10+i;
+        x2 = painter.viewport().left()+20+pos;
+        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(int value)
+{
+    level = value;
+    repaint();
+}
+
+
+InputTest::InputTest()
+{
+    QWidget *window = new QWidget;
+    QVBoxLayout* layout = new QVBoxLayout;
+
+    canvas = new RenderArea;
+    layout->addWidget(canvas);
+
+    deviceBox = new QComboBox(this);
+    QList<QAudioDeviceInfo> devices = QAudioDeviceInfo::deviceList(QAudio::AudioInput);
+    for(int i = 0; i < devices.size(); ++i) {
+        deviceBox->addItem(devices.at(i).deviceName(), qVariantFromValue(devices.at(i)));
+    }
+    connect(deviceBox,SIGNAL(activated(int)),SLOT(deviceChanged(int)));
+    layout->addWidget(deviceBox);
+
+    button = new QPushButton(this);
+    button->setText(tr("Click for Push Mode"));
+    connect(button,SIGNAL(clicked()),SLOT(toggleMode()));
+    layout->addWidget(button);
+
+    button2 = new QPushButton(this);
+    button2->setText(tr("Click To Suspend"));
+    connect(button2,SIGNAL(clicked()),SLOT(toggleSuspend()));
+    layout->addWidget(button2);
+
+    window->setLayout(layout);
+    setCentralWidget(window);
+    window->show();
+
+    buffer = new char[BUFFER_SIZE];
+
+    pullMode = true;
+
+    // AudioInfo class only supports mono S16LE samples!
+    format.setFrequency(8000);
+    format.setChannels(1);
+    format.setSampleSize(16);
+    format.setSampleType(QAudioFormat::SignedInt);
+    format.setByteOrder(QAudioFormat::LittleEndian);
+    format.setCodec("audio/pcm");
+
+    audioInput = new QAudioInput(format,this);
+    connect(audioInput,SIGNAL(notify()),SLOT(status()));
+    connect(audioInput,SIGNAL(stateChanged(QAudio::State)),SLOT(state(QAudio::State)));
+    audioinfo  = new AudioInfo(this,audioInput);
+    connect(audioinfo,SIGNAL(update()),SLOT(refreshDisplay()));
+    audioinfo->start();
+    audioInput->start(audioinfo);
+}
+
+InputTest::~InputTest() {}
+
+void InputTest::status()
+{
+    qWarning()<<"bytesReady = "<<audioInput->bytesReady()<<" bytes, clock = "<<audioInput->clock()<<"ms, totalTime = "<<audioInput->totalTime()/1000<<"ms";
+}
+
+void InputTest::readMore()
+{
+    if(!audioInput)
+        return;
+    qint64 len = audioInput->bytesReady();
+    if(len > 4096)
+        len = 4096;
+    qint64 l = input->read(buffer,len);
+    if(l > 0) {
+        audioinfo->write(buffer,l);
+    }
+}
+
+void InputTest::toggleMode()
+{
+    // Change bewteen pull and push modes
+    audioInput->stop();
+
+    if (pullMode) {
+        button->setText(tr("Click for Pull Mode"));
+        input = audioInput->start(0);
+        connect(input,SIGNAL(readyRead()),SLOT(readMore()));
+        pullMode = false;
+    } else {
+        button->setText(tr("Click for Push Mode"));
+        pullMode = true;
+        audioInput->start(audioinfo);
+    }
+}
+
+void InputTest::toggleSuspend()
+{
+    // toggle suspend/resume
+    if(audioInput->state() == QAudio::SuspendState) {
+        qWarning()<<"status: Suspended, resume()";
+        audioInput->resume();
+        button2->setText("Click To Suspend");
+    } else if (audioInput->state() == QAudio::ActiveState) {
+        qWarning()<<"status: Active, suspend()";
+        audioInput->suspend();
+        button2->setText("Click To Resume");
+    } else if (audioInput->state() == QAudio::StopState) {
+        qWarning()<<"status: Stopped, resume()";
+        audioInput->resume();
+        button2->setText("Click To Suspend");
+    } else if (audioInput->state() == QAudio::IdleState) {
+        qWarning()<<"status: IdleState";
+    }
+}
+
+void InputTest::state(QAudio::State state)
+{
+    qWarning()<<" state="<<state;
+}
+
+void InputTest::refreshDisplay()
+{
+    canvas->setLevel(audioinfo->LinearMax());
+    canvas->repaint();
+}
+
+void InputTest::deviceChanged(int idx)
+{
+    audioinfo->stop();
+    audioInput->stop();
+    audioInput->disconnect(this);
+    delete audioInput;
+
+    device = deviceBox->itemData(idx).value<QAudioDeviceInfo>();
+    audioInput = new QAudioInput(device, format, this);
+    connect(audioInput,SIGNAL(notify()),SLOT(status()));
+    connect(audioInput,SIGNAL(stateChanged(QAudio::State)),SLOT(state(QAudio::State)));
+    audioinfo->start();
+    audioInput->start(audioinfo);
+}