diff options
author | Oswald Buddenhagen <oswald.buddenhagen@nokia.com> | 2011-11-09 20:42:00 +0100 |
---|---|---|
committer | Michael Goddard <michael.goddard@nokia.com> | 2011-11-10 04:15:38 +0100 |
commit | 1d76e399c5d9277895786c6edc2cec76f99d0531 (patch) | |
tree | f56640988d767202cc8f449ff78ad26ff739d314 /examples/audiooutput | |
parent | 1e542df82fbcc4e3a8f75537af204f83827a4587 (diff) |
Change-Id: Id6de29b7c1e96aed16be8251195c744f68a2d46b
Reviewed-by: Michael Goddard <michael.goddard@nokia.com>
Diffstat (limited to 'examples/audiooutput')
-rw-r--r-- | examples/audiooutput/audiooutput.cpp | 334 | ||||
-rw-r--r-- | examples/audiooutput/audiooutput.h | 128 | ||||
-rw-r--r-- | examples/audiooutput/audiooutput.pro | 17 | ||||
-rw-r--r-- | examples/audiooutput/main.cpp | 55 |
4 files changed, 0 insertions, 534 deletions
diff --git a/examples/audiooutput/audiooutput.cpp b/examples/audiooutput/audiooutput.cpp deleted file mode 100644 index b8193fb..0000000 --- a/examples/audiooutput/audiooutput.cpp +++ /dev/null @@ -1,334 +0,0 @@ -/**************************************************************************** -** -** 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. -** -** $QT_BEGIN_LICENSE:BSD$ -** 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 Nokia Corporation 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 <QDebug> -#include <QVBoxLayout> - -#include <qaudiooutput.h> -#include <qaudiodeviceinfo.h> -#include <QtCore/qmath.h> -#include <QtCore/qendian.h> -#include "audiooutput.h" - -const QString AudioTest::PushModeLabel(tr("Enable push mode")); -const QString AudioTest::PullModeLabel(tr("Enable pull mode")); -const QString AudioTest::SuspendLabel(tr("Suspend playback")); -const QString AudioTest::ResumeLabel(tr("Resume playback")); -const QString AudioTest::VolumeLabel(tr("Volume:")); - -const int DurationSeconds = 1; -const int ToneFrequencyHz = 600; -const int DataFrequencyHz = 44100; -const int BufferSize = 32768; - - -Generator::Generator(const QAudioFormat &format, - qint64 durationUs, - int frequency, - QObject *parent) - : QIODevice(parent) - , m_pos(0) -{ - generateData(format, durationUs, frequency); -} - -Generator::~Generator() -{ - -} - -void Generator::start() -{ - open(QIODevice::ReadOnly); -} - -void Generator::stop() -{ - m_pos = 0; - close(); -} - -void Generator::generateData(const QAudioFormat &format, qint64 durationUs, int frequency) -{ - const int channelBytes = format.sampleSize() / 8; - const int sampleBytes = format.channels() * channelBytes; - - qint64 length = (format.frequency() * format.channels() * (format.sampleSize() / 8)) - * durationUs / 100000; - - Q_ASSERT(length % sampleBytes == 0); - Q_UNUSED(sampleBytes) // suppress warning in release builds - - m_buffer.resize(length); - unsigned char *ptr = reinterpret_cast<unsigned char *>(m_buffer.data()); - int sampleIndex = 0; - - while (length) { - const qreal x = qSin(2 * M_PI * frequency * qreal(sampleIndex % format.frequency()) / format.frequency()); - for (int i=0; i<format.channels(); ++i) { - if (format.sampleSize() == 8 && format.sampleType() == QAudioFormat::UnSignedInt) { - const quint8 value = static_cast<quint8>((1.0 + x) / 2 * 255); - *reinterpret_cast<quint8*>(ptr) = value; - } else if (format.sampleSize() == 8 && format.sampleType() == QAudioFormat::SignedInt) { - const qint8 value = static_cast<qint8>(x * 127); - *reinterpret_cast<quint8*>(ptr) = value; - } else if (format.sampleSize() == 16 && format.sampleType() == QAudioFormat::UnSignedInt) { - quint16 value = static_cast<quint16>((1.0 + x) / 2 * 65535); - if (format.byteOrder() == QAudioFormat::LittleEndian) - qToLittleEndian<quint16>(value, ptr); - else - qToBigEndian<quint16>(value, ptr); - } else if (format.sampleSize() == 16 && format.sampleType() == QAudioFormat::SignedInt) { - qint16 value = static_cast<qint16>(x * 32767); - if (format.byteOrder() == QAudioFormat::LittleEndian) - qToLittleEndian<qint16>(value, ptr); - else - qToBigEndian<qint16>(value, ptr); - } - - ptr += channelBytes; - length -= channelBytes; - } - ++sampleIndex; - } -} - -qint64 Generator::readData(char *data, qint64 len) -{ - qint64 total = 0; - while (len - total > 0) { - const qint64 chunk = qMin((m_buffer.size() - m_pos), len - total); - memcpy(data + total, m_buffer.constData() + m_pos, chunk); - m_pos = (m_pos + chunk) % m_buffer.size(); - total += chunk; - } - return total; -} - -qint64 Generator::writeData(const char *data, qint64 len) -{ - Q_UNUSED(data); - Q_UNUSED(len); - - return 0; -} - -qint64 Generator::bytesAvailable() const -{ - return m_buffer.size() + QIODevice::bytesAvailable(); -} - -AudioTest::AudioTest() - : m_pullTimer(new QTimer(this)) - , m_modeButton(0) - , m_suspendResumeButton(0) - , m_deviceBox(0) - , m_device(QAudioDeviceInfo::defaultOutputDevice()) - , m_generator(0) - , m_audioOutput(0) - , m_output(0) - , m_buffer(BufferSize, 0) -{ - initializeWindow(); - initializeAudio(); -} - -void AudioTest::initializeWindow() -{ - QScopedPointer<QWidget> window(new QWidget); - QScopedPointer<QVBoxLayout> layout(new QVBoxLayout); - - m_deviceBox = new QComboBox(this); - foreach (const QAudioDeviceInfo &deviceInfo, QAudioDeviceInfo::availableDevices(QAudio::AudioOutput)) - m_deviceBox->addItem(deviceInfo.deviceName(), qVariantFromValue(deviceInfo)); - 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(toggleSuspendResume())); - layout->addWidget(m_suspendResumeButton); - - QHBoxLayout *volumeBox = new QHBoxLayout; - m_volumeLabel = new QLabel; - m_volumeLabel->setText(VolumeLabel); - m_volumeSlider = new QSlider(Qt::Horizontal); - m_volumeSlider->setMinimum(0); - m_volumeSlider->setMaximum(100); - m_volumeSlider->setSingleStep(10); - connect(m_volumeSlider, SIGNAL(valueChanged(int)), this, SLOT(volumeChanged(int))); - volumeBox->addWidget(m_volumeLabel); - volumeBox->addWidget(m_volumeSlider); - layout->addLayout(volumeBox); - - window->setLayout(layout.data()); - layout.take(); // ownership transferred - - setCentralWidget(window.data()); - QWidget *const windowPtr = window.take(); // ownership transferred - windowPtr->show(); -} - -void AudioTest::initializeAudio() -{ - connect(m_pullTimer, SIGNAL(timeout()), SLOT(pullTimerExpired())); - - m_pullMode = true; - - m_format.setFrequency(DataFrequencyHz); - m_format.setChannels(1); - m_format.setSampleSize(16); - m_format.setCodec("audio/pcm"); - m_format.setByteOrder(QAudioFormat::LittleEndian); - m_format.setSampleType(QAudioFormat::SignedInt); - - QAudioDeviceInfo info(QAudioDeviceInfo::defaultOutputDevice()); - if (!info.isFormatSupported(m_format)) { - qWarning() << "Default format not supported - trying to use nearest"; - m_format = info.nearestFormat(m_format); - } - - m_generator = new Generator(m_format, DurationSeconds*1000000, ToneFrequencyHz, this); - - createAudioOutput(); -} - -void AudioTest::createAudioOutput() -{ - delete m_audioOutput; - m_audioOutput = 0; - m_audioOutput = new QAudioOutput(m_device, m_format, this); - connect(m_audioOutput, SIGNAL(notify()), SLOT(notified())); - connect(m_audioOutput, SIGNAL(stateChanged(QAudio::State)), SLOT(stateChanged(QAudio::State))); - m_generator->start(); - m_audioOutput->start(m_generator); - m_volumeSlider->setValue(int(m_audioOutput->volume()*100.0f)); -} - -AudioTest::~AudioTest() -{ - -} - -void AudioTest::deviceChanged(int index) -{ - m_pullTimer->stop(); - m_generator->stop(); - m_audioOutput->stop(); - m_audioOutput->disconnect(this); - m_device = m_deviceBox->itemData(index).value<QAudioDeviceInfo>(); - createAudioOutput(); -} - -void AudioTest::volumeChanged(int value) -{ - if (m_audioOutput) - m_audioOutput->setVolume(qreal(value/100.0f)); -} - -void AudioTest::notified() -{ - qWarning() << "bytesFree = " << m_audioOutput->bytesFree() - << ", " << "elapsedUSecs = " << m_audioOutput->elapsedUSecs() - << ", " << "processedUSecs = " << m_audioOutput->processedUSecs(); -} - -void AudioTest::pullTimerExpired() -{ - if (m_audioOutput && m_audioOutput->state() != QAudio::StoppedState) { - int chunks = m_audioOutput->bytesFree()/m_audioOutput->periodSize(); - while (chunks) { - const qint64 len = m_generator->read(m_buffer.data(), m_audioOutput->periodSize()); - if (len) - m_output->write(m_buffer.data(), len); - if (len != m_audioOutput->periodSize()) - break; - --chunks; - } - } -} - -void AudioTest::toggleMode() -{ - m_pullTimer->stop(); - m_audioOutput->stop(); - - if (m_pullMode) { - m_modeButton->setText(PullModeLabel); - m_output = m_audioOutput->start(); - m_pullMode = false; - m_pullTimer->start(20); - } else { - m_modeButton->setText(PushModeLabel); - m_pullMode = true; - m_audioOutput->start(m_generator); - } - - m_suspendResumeButton->setText(SuspendLabel); -} - -void AudioTest::toggleSuspendResume() -{ - if (m_audioOutput->state() == QAudio::SuspendedState) { - qWarning() << "status: Suspended, resume()"; - m_audioOutput->resume(); - m_suspendResumeButton->setText(SuspendLabel); - } else if (m_audioOutput->state() == QAudio::ActiveState) { - qWarning() << "status: Active, suspend()"; - m_audioOutput->suspend(); - m_suspendResumeButton->setText(ResumeLabel); - } else if (m_audioOutput->state() == QAudio::StoppedState) { - qWarning() << "status: Stopped, resume()"; - m_audioOutput->resume(); - m_suspendResumeButton->setText(SuspendLabel); - } else if (m_audioOutput->state() == QAudio::IdleState) { - qWarning() << "status: IdleState"; - } -} - -void AudioTest::stateChanged(QAudio::State state) -{ - qWarning() << "state = " << state; -} diff --git a/examples/audiooutput/audiooutput.h b/examples/audiooutput/audiooutput.h deleted file mode 100644 index 3a07039..0000000 --- a/examples/audiooutput/audiooutput.h +++ /dev/null @@ -1,128 +0,0 @@ -/**************************************************************************** -** -** 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. -** -** $QT_BEGIN_LICENSE:BSD$ -** 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 Nokia Corporation 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." -** $QT_END_LICENSE$ -** -****************************************************************************/ - -#ifndef AUDIOOUTPUT_H -#define AUDIOOUTPUT_H - -#include <math.h> - -#include <QObject> -#include <QMainWindow> -#include <QLabel> -#include <QSlider> -#include <QIODevice> -#include <QTimer> -#include <QPushButton> -#include <QComboBox> -#include <QByteArray> - -#include <qaudiooutput.h> - -class Generator : public QIODevice -{ - Q_OBJECT -public: - Generator(const QAudioFormat &format, qint64 durationUs, int frequency, QObject *parent); - ~Generator(); - - void start(); - void stop(); - - qint64 readData(char *data, qint64 maxlen); - qint64 writeData(const char *data, qint64 len); - qint64 bytesAvailable() const; - -private: - void generateData(const QAudioFormat &format, qint64 durationUs, int frequency); - -private: - qint64 m_pos; - QByteArray m_buffer; -}; - -class AudioTest : public QMainWindow -{ - Q_OBJECT -public: - AudioTest(); - ~AudioTest(); - -private: - void initializeWindow(); - void initializeAudio(); - void createAudioOutput(); - -private: - QTimer* m_pullTimer; - - // Owned by layout - QPushButton* m_modeButton; - QPushButton* m_suspendResumeButton; - QComboBox* m_deviceBox; - QLabel* m_volumeLabel; - QSlider* m_volumeSlider; - - QAudioDeviceInfo m_device; - Generator* m_generator; - QAudioOutput* m_audioOutput; - QIODevice* m_output; // not owned - QAudioFormat m_format; - - bool m_pullMode; - QByteArray m_buffer; - - static const QString PushModeLabel; - static const QString PullModeLabel; - static const QString SuspendLabel; - static const QString ResumeLabel; - static const QString VolumeLabel; - -private slots: - void notified(); - void pullTimerExpired(); - void toggleMode(); - void toggleSuspendResume(); - void stateChanged(QAudio::State state); - void deviceChanged(int index); - void volumeChanged(int); -}; - -#endif - diff --git a/examples/audiooutput/audiooutput.pro b/examples/audiooutput/audiooutput.pro deleted file mode 100644 index f2a2244..0000000 --- a/examples/audiooutput/audiooutput.pro +++ /dev/null @@ -1,17 +0,0 @@ -TEMPLATE = app -TARGET += audiooutput - -QT += multimedia - -HEADERS = audiooutput.h - -SOURCES = audiooutput.cpp \ - main.cpp - -target.path = $$[QT_INSTALL_EXAMPLES]/qtmultimedia/audiooutput -sources.files = $$SOURCES $$HEADERS $$RESOURCES $$FORMS *.pro -sources.path = $$[QT_INSTALL_EXAMPLES]/qtmultimedia/audiooutput - -INSTALLS += target sources - -QT+=widgets diff --git a/examples/audiooutput/main.cpp b/examples/audiooutput/main.cpp deleted file mode 100644 index 0c18715..0000000 --- a/examples/audiooutput/main.cpp +++ /dev/null @@ -1,55 +0,0 @@ -/**************************************************************************** -** -** 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. -** -** $QT_BEGIN_LICENSE:BSD$ -** 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 Nokia Corporation 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 <QtWidgets> - -#include "audiooutput.h" - -int main(int argv, char **args) -{ - QApplication app(argv, args); - app.setApplicationName("Audio Output Test"); - - AudioTest audio; - audio.show(); - - return app.exec(); -} |