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Diffstat (limited to 'examples/multimedia/audioinput/audioinput.cpp')
| -rw-r--r-- | examples/multimedia/audioinput/audioinput.cpp | 405 |
1 files changed, 405 insertions, 0 deletions
diff --git a/examples/multimedia/audioinput/audioinput.cpp b/examples/multimedia/audioinput/audioinput.cpp new file mode 100644 index 000000000..5aeb1a7a8 --- /dev/null +++ b/examples/multimedia/audioinput/audioinput.cpp @@ -0,0 +1,405 @@ +/**************************************************************************** +** +** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies). +** Contact: http://www.qt-project.org/legal +** +** This file is part of the examples of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:BSD$ +** You may use this file under the terms of the BSD license as follows: +** +** "Redistribution and use in source and binary forms, with or without +** modification, are permitted provided that the following conditions are +** met: +** * Redistributions of source code must retain the above copyright +** notice, this list of conditions and the following disclaimer. +** * Redistributions in binary form must reproduce the above copyright +** notice, this list of conditions and the following disclaimer in +** the documentation and/or other materials provided with the +** distribution. +** * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names +** of its contributors may be used to endorse or promote products derived +** from this software without specific prior written permission. +** +** +** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include <stdlib.h> +#include <math.h> + +#include <QDateTime> +#include <QDebug> +#include <QPainter> +#include <QVBoxLayout> +#include <QAudioDeviceInfo> +#include <QAudioInput> +#include <qendian.h> + +#include "audioinput.h" + +#define PUSH_MODE_LABEL "Enable push mode" +#define PULL_MODE_LABEL "Enable pull mode" +#define SUSPEND_LABEL "Suspend recording" +#define RESUME_LABEL "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; + + case 32: + switch (m_format.sampleType()) { + case QAudioFormat::UnSignedInt: + m_maxAmplitude = 0xffffffff; + break; + case QAudioFormat::SignedInt: + m_maxAmplitude = 0x7fffffff; + break; + case QAudioFormat::Float: + m_maxAmplitude = 0x7fffffff; // Kind of + 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.channelCount() * channelBytes; + Q_ASSERT(len % sampleBytes == 0); + const int numSamples = len / sampleBytes; + + quint32 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.channelCount(); ++j) { + quint32 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)); + } else if (m_format.sampleSize() == 32 && m_format.sampleType() == QAudioFormat::UnSignedInt) { + if (m_format.byteOrder() == QAudioFormat::LittleEndian) + value = qFromLittleEndian<quint32>(ptr); + else + value = qFromBigEndian<quint32>(ptr); + } else if (m_format.sampleSize() == 32 && m_format.sampleType() == QAudioFormat::SignedInt) { + if (m_format.byteOrder() == QAudioFormat::LittleEndian) + value = qAbs(qFromLittleEndian<qint32>(ptr)); + else + value = qAbs(qFromBigEndian<qint32>(ptr)); + } else if (m_format.sampleSize() == 32 && m_format.sampleType() == QAudioFormat::Float) { + value = qAbs(*reinterpret_cast<const float*>(ptr) * 0x7fffffff); // assumes 0-1.0 + } + + 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; + + int pos = ((painter.viewport().right()-20)-(painter.viewport().left()+11))*m_level; + painter.fillRect(painter.viewport().left()+11, + painter.viewport().top()+10, + pos, + painter.viewport().height()-21, + Qt::red); +} + +void RenderArea::setLevel(qreal value) +{ + m_level = value; + update(); +} + + +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_volumeSlider = new QSlider(Qt::Horizontal, this); + m_volumeSlider->setRange(0, 100); + m_volumeSlider->setValue(100); + connect(m_volumeSlider, SIGNAL(valueChanged(int)), SLOT(sliderChanged(int))); + layout->addWidget(m_volumeSlider); + + m_modeButton = new QPushButton(this); + m_modeButton->setText(tr(PUSH_MODE_LABEL)); + connect(m_modeButton, SIGNAL(clicked()), SLOT(toggleMode())); + layout->addWidget(m_modeButton); + + m_suspendResumeButton = new QPushButton(this); + m_suspendResumeButton->setText(tr(SUSPEND_LABEL)); + 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.setSampleRate(8000); + m_format.setChannelCount(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_volumeSlider->setValue(m_audioInput->volume() * 100); + 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 > BufferSize) + len = BufferSize; + 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(tr(PULL_MODE_LABEL)); + m_input = m_audioInput->start(); + connect(m_input, SIGNAL(readyRead()), SLOT(readMore())); + m_pullMode = false; + } else { + m_modeButton->setText(tr(PUSH_MODE_LABEL)); + m_pullMode = true; + m_audioInput->start(m_audioInfo); + } + + m_suspendResumeButton->setText(tr(SUSPEND_LABEL)); +} + +void InputTest::toggleSuspend() +{ + // toggle suspend/resume + if (m_audioInput->state() == QAudio::SuspendedState) { + qWarning() << "status: Suspended, resume()"; + m_audioInput->resume(); + m_suspendResumeButton->setText(tr(SUSPEND_LABEL)); + } else if (m_audioInput->state() == QAudio::ActiveState) { + qWarning() << "status: Active, suspend()"; + m_audioInput->suspend(); + m_suspendResumeButton->setText(tr(RESUME_LABEL)); + } else if (m_audioInput->state() == QAudio::StoppedState) { + qWarning() << "status: Stopped, resume()"; + m_audioInput->resume(); + m_suspendResumeButton->setText(tr(SUSPEND_LABEL)); + } 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()); +} + +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(); +} + +void InputTest::sliderChanged(int value) +{ + if (m_audioInput) + m_audioInput->setVolume(qreal(value) / 100); +} |