qtmobility/plugins/multimedia/symbian/mmf/audiosource/s60audioencodercontrol.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Wed, 23 Jun 2010 19:08:38 +0300
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permissions -rw-r--r--
Revision: 201023 Kit: 2010125
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/****************************************************************************
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**
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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
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** All rights reserved.
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** Contact: Nokia Corporation (qt-info@nokia.com)
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**
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** This file is part of the Qt Mobility Components.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** No Commercial Usage
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** This file contains pre-release code and may not be distributed.
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** You may use this file in accordance with the terms and conditions
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** contained in the Technology Preview License Agreement accompanying
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** this package.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL included in the
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** packaging of this file.  Please review the following information to
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** ensure the GNU Lesser General Public License version 2.1 requirements
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** In addition, as a special exception, Nokia gives you certain additional
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** rights.  These rights are described in the Nokia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** If you have questions regarding the use of this file, please contact
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** Nokia at qt-info@nokia.com.
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**
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**
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**
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**
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**
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**
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**
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include "s60audioencodercontrol.h"
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#include "s60audiocapturesession.h"
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#include <QAudioFormat>
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#include <QtCore/qdebug.h>
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S60AudioEncoderControl::S60AudioEncoderControl(QObject *session, QObject *parent)
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    :QAudioEncoderControl(parent), m_quality(QtMultimedia::NormalQuality)
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{   
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    m_session = qobject_cast<S60AudioCaptureSession*>(session);
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    QAudioFormat fmt = m_session->format();
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    // medium, 22050Hz mono S16
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    fmt.setSampleType(QAudioFormat::SignedInt);
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    fmt.setSampleSize(16);
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    fmt.setFrequency(22050);
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    fmt.setChannels(1);
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    m_session->setFormat(fmt);
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}
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S60AudioEncoderControl::~S60AudioEncoderControl()
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{
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}
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QStringList S60AudioEncoderControl::supportedAudioCodecs() const
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{
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    return m_session->supportedAudioCodecs();
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}
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QString S60AudioEncoderControl::codecDescription(const QString &codecName) const
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{
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	return m_session->codecDescription(codecName);    
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}
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QtMultimedia::EncodingQuality S60AudioEncoderControl::quality() const
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{
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    return m_quality;
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}
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void S60AudioEncoderControl::setQuality(QtMultimedia::EncodingQuality value, QAudioFormat &fmt)
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{
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    switch (value) {
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    case QtMultimedia::VeryLowQuality:
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    case QtMultimedia::LowQuality:
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        // low, 8000Hz mono U8
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        fmt.setSampleType(QAudioFormat::UnSignedInt);
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        fmt.setSampleSize(8);
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        fmt.setFrequency(8000);
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        fmt.setChannels(1);
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        break;
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    case QtMultimedia::NormalQuality:
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        // medium, 22050Hz mono S16
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        fmt.setSampleType(QAudioFormat::SignedInt);
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        fmt.setSampleSize(16);
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        fmt.setFrequency(22050);
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        fmt.setChannels(1);
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        break;
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    case QtMultimedia::HighQuality:
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    case QtMultimedia::VeryHighQuality:    
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        // high, 44100Hz mono S16
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        fmt.setSampleType(QAudioFormat::SignedInt);
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        fmt.setSampleSize(16);
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        fmt.setFrequency(44100);
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        fmt.setChannels(2);
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        break;
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    default:
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        break;
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    }
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}
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QStringList S60AudioEncoderControl::supportedEncodingOptions(const QString &codec) const
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{
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    Q_UNUSED(codec)
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    QStringList list;
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    if (codec == "PCM") 
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        list << "quality" << "channels" << "samplerate";        
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     return list;
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}
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QVariant S60AudioEncoderControl::encodingOption(const QString &codec, const QString &name) const
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{
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    if (codec == "PCM") {
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        QAudioFormat fmt = m_session->format();
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        if(qstrcmp(name.toLocal8Bit().constData(), "quality") == 0) {
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            return QVariant(quality());
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        }        
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        else if(qstrcmp(name.toLocal8Bit().constData(), "channels") == 0) {
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            return QVariant(fmt.channels());
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        }                
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        else if(qstrcmp(name.toLocal8Bit().constData(), "samplerate") == 0) {
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            return QVariant(fmt.frequency());
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        }       
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    }
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    return QVariant();
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}
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void S60AudioEncoderControl::setEncodingOption(
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        const QString &codec, const QString &name, const QVariant &value)
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{
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    if (codec == "PCM") {        
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        QAudioFormat fmt = m_session->format();
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        if(qstrcmp(name.toLocal8Bit().constData(), "quality") == 0) {
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            setQuality((QtMultimedia::EncodingQuality)value.toInt(), fmt);
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        } else if(qstrcmp(name.toLocal8Bit().constData(), "channels") == 0) {
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            fmt.setChannels(value.toInt());
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        } else if(qstrcmp(name.toLocal8Bit().constData(), "samplerate") == 0) {
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            fmt.setFrequency(value.toInt());
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        }
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        m_session->setFormat(fmt);
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    }
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}
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QList<int> S60AudioEncoderControl::supportedSampleRates(const QAudioEncoderSettings &settings, bool *continuous) const
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{
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    if (continuous)
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        *continuous = false;
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    return m_session->supportedAudioSampleRates(settings);       
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}
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QAudioEncoderSettings S60AudioEncoderControl::audioSettings() const
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{
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    return m_settings;
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}
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void S60AudioEncoderControl::setAudioSettings(const QAudioEncoderSettings &settings)
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{
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    QAudioFormat fmt = m_session->format();
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    if (settings.encodingMode() == QtMultimedia::ConstantQualityEncoding) {
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        fmt.setCodec(settings.codec());
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        setQuality(settings.quality(), fmt);
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        if (settings.sampleRate() > 0) {
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            fmt.setFrequency(settings.sampleRate());
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        }
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        if (settings.channelCount() > 0)
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            fmt.setChannels(settings.channelCount());
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    }else {
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        if (settings.sampleRate() == 8000) {
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            fmt.setSampleType(QAudioFormat::UnSignedInt);
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            fmt.setSampleSize(8);
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        } else {
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            fmt.setSampleType(QAudioFormat::SignedInt);
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            fmt.setSampleSize(16);
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        }
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        fmt.setCodec(settings.codec());
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        fmt.setFrequency(settings.sampleRate());
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        fmt.setChannels(settings.channelCount());
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    }
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    m_session->setFormat(fmt);
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    m_settings = settings;
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}