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/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "audioencodercontrol.h"
#include "audiocapturesession.h"
#include <qaudioformat.h>
#include <QtCore/qdebug.h>
QT_BEGIN_NAMESPACE
static QAudioFormat audioSettingsToAudioFormat(const QAudioEncoderSettings &settings)
{
QAudioFormat fmt;
fmt.setCodec(settings.codec());
fmt.setChannelCount(settings.channelCount());
fmt.setSampleRate(settings.sampleRate());
if (settings.sampleRate() == 8000 && settings.bitRate() == 8000) {
fmt.setSampleType(QAudioFormat::UnSignedInt);
fmt.setSampleSize(8);
} else {
fmt.setSampleSize(16);
fmt.setSampleType(QAudioFormat::SignedInt);
}
fmt.setByteOrder(QAudioDeviceInfo::defaultInputDevice().preferredFormat().byteOrder());
return fmt;
}
static QAudioEncoderSettings audioFormatToAudioSettings(const QAudioFormat &format)
{
QAudioEncoderSettings settings;
settings.setCodec(format.codec());
settings.setChannelCount(format.channelCount());
settings.setSampleRate(format.sampleRate());
settings.setEncodingMode(QMultimedia::ConstantBitRateEncoding);
settings.setBitRate(format.channelCount()
* format.sampleSize()
* format.sampleRate());
return settings;
}
AudioEncoderControl::AudioEncoderControl(QObject *parent)
:QAudioEncoderSettingsControl(parent)
{
m_session = qobject_cast<AudioCaptureSession*>(parent);
update();
}
AudioEncoderControl::~AudioEncoderControl()
{
}
QStringList AudioEncoderControl::supportedAudioCodecs() const
{
return QStringList() << QStringLiteral("audio/pcm");
}
QString AudioEncoderControl::codecDescription(const QString &codecName) const
{
if (QString::compare(codecName, QLatin1String("audio/pcm")) == 0)
return tr("Linear PCM audio data");
return QString();
}
QList<int> AudioEncoderControl::supportedSampleRates(const QAudioEncoderSettings &settings, bool *continuous) const
{
if (continuous)
*continuous = false;
if (settings.codec().isEmpty() || settings.codec() == QLatin1String("audio/pcm"))
return m_sampleRates;
return QList<int>();
}
QAudioEncoderSettings AudioEncoderControl::audioSettings() const
{
return audioFormatToAudioSettings(m_session->format());
}
void AudioEncoderControl::setAudioSettings(const QAudioEncoderSettings &settings)
{
QAudioFormat fmt = audioSettingsToAudioFormat(settings);
if (settings.encodingMode() == QMultimedia::ConstantQualityEncoding) {
fmt.setCodec("audio/pcm");
switch (settings.quality()) {
case QMultimedia::VeryLowQuality:
fmt.setSampleSize(8);
fmt.setSampleRate(8000);
fmt.setSampleType(QAudioFormat::UnSignedInt);
break;
case QMultimedia::LowQuality:
fmt.setSampleSize(8);
fmt.setSampleRate(22050);
fmt.setSampleType(QAudioFormat::UnSignedInt);
break;
case QMultimedia::HighQuality:
fmt.setSampleSize(16);
fmt.setSampleRate(48000);
fmt.setSampleType(QAudioFormat::SignedInt);
break;
case QMultimedia::VeryHighQuality:
fmt.setSampleSize(16);
fmt.setSampleRate(96000);
fmt.setSampleType(QAudioFormat::SignedInt);
break;
case QMultimedia::NormalQuality:
default:
fmt.setSampleSize(16);
fmt.setSampleRate(44100);
fmt.setSampleType(QAudioFormat::SignedInt);
break;
}
}
m_session->setFormat(fmt);
}
void AudioEncoderControl::update()
{
m_sampleRates.clear();
QList<QAudioDeviceInfo> devices = QAudioDeviceInfo::availableDevices(QAudio::AudioInput);
for (int i = 0; i < devices.size(); ++i) {
QList<int> rates = devices.at(i).supportedSampleRates();
for (int j = 0; j < rates.size(); ++j) {
int rate = rates.at(j);
if (!m_sampleRates.contains(rate))
m_sampleRates.append(rate);
}
}
qSort(m_sampleRates);
}
QT_END_NAMESPACE
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