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/****************************************************************************
**
** Copyright (C) 2019 Luxoft Sweden AB
** Contact: https://www.qt.io/licensing/
**
** This file is part of the Neptune 3 UI.
**
** $QT_BEGIN_LICENSE:GPL-QTAS$
** Commercial License Usage
** Licensees holding valid commercial Qt Automotive Suite 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 General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 or (at your option) 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.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-3.0.html.
**
** $QT_END_LICENSE$
**
** SPDX-License-Identifier: GPL-3.0
**
****************************************************************************/
#include "QtMicrophoneWrapper.h"
#include <QDebug>
using alexaClientSDK::avsCommon::avs::AudioInputStream;
static const int NUM_INPUT_CHANNELS = 1;
static const int SAMPLE_RATE = 16000;
static const int SAMPLE_SIZE = 16;
static const double LATENCY = 0.2; //seconds
std::unique_ptr<QtMicrophoneWrapper> QtMicrophoneWrapper::create(std::shared_ptr<AudioInputStream> stream,
const QString &deviceName)
{
if (!stream) {
qWarning() << "QtMicrophoneWrapper: Invalid stream passed to QtMicrophoneWrapper";
return nullptr;
}
std::unique_ptr<QtMicrophoneWrapper> qtMicrophoneWrapper(new QtMicrophoneWrapper(stream));
if (!qtMicrophoneWrapper->initialize(deviceName)) {
qWarning() << "QtMicrophoneWrapper: Failed to initialize QtMicrophoneWrapper";
return nullptr;
}
return qtMicrophoneWrapper;
}
QtMicrophoneWrapper::QtMicrophoneWrapper(std::shared_ptr<AudioInputStream> stream) : m_audioInputStream{stream}
{
}
QtMicrophoneWrapper::~QtMicrophoneWrapper() {
}
bool QtMicrophoneWrapper::initialize(const QString &deviceName) {
m_writer = m_audioInputStream->createWriter(AudioInputStream::Writer::Policy::NONBLOCKABLE);
if (!m_writer) {
qWarning("QtMicrophoneWrapper: Failed to create stream writer");
return false;
}
setAudioDevice(deviceName);
return true;
}
bool QtMicrophoneWrapper::startStreamingMicrophoneData() {
m_readAudioData.clear();
m_readAudioDataBytes = 0;
m_audioInputIODevice = m_audioInput->start();
if (m_audioInput->error() != QAudio::NoError) {
qWarning() << "Start stream error:" << m_audioInput->error();
return false;
}
if (m_audioInput->state() != QAudio::ActiveState
&& m_audioInput->state() != QAudio::IdleState) {
qWarning() << "Wrong input state:" << m_audioInput->state();
return false;
}
QByteArray readBytes = m_audioInputIODevice->readAll();
m_readAudioData.append(readBytes);
m_readAudioDataBytes += readBytes.count();
QObject::connect( m_audioInputIODevice, &QIODevice::readyRead, this, [this](){
QByteArray readBytes = m_audioInputIODevice->readAll();
m_readAudioData.append(readBytes);
m_readAudioDataBytes += readBytes.count();
});
return true;
}
bool QtMicrophoneWrapper::stopStreamingMicrophoneData() {
m_audioInput->stop();
return true;
}
void QtMicrophoneWrapper::setAudioDevice(const QString &deviceName) {
qDebug() << "Trying to select input device: " << deviceName;
QAudioFormat format;
format.setSampleRate(SAMPLE_RATE);
format.setChannelCount(NUM_INPUT_CHANNELS);
format.setSampleSize(SAMPLE_SIZE);
format.setCodec("audio/pcm");
format.setByteOrder(QAudioFormat::LittleEndian);
format.setSampleType(QAudioFormat::SignedInt);
m_audioInfo = QAudioDeviceInfo::defaultInputDevice();
QList<QAudioDeviceInfo> devices = QAudioDeviceInfo::availableDevices(QAudio::AudioInput);
qDebug() << "Available capture devices:" << devices.size();
for (QAudioDeviceInfo &device : devices) {
qDebug() << " device name: " << device.deviceName();
if (device.deviceName() == deviceName) {
m_audioInfo = device;
}
}
qDebug() << "Selected capture device:" << m_audioInfo.deviceName();
qDebug() << "Requested format" << format;
if (!m_audioInfo.isFormatSupported(format)) {
qWarning() << "QtMicrophoneWrapper: Default format not supported, trying to use the nearest.";
format = m_audioInfo.nearestFormat(format);
qWarning() << "QtMicrophoneWrapper: Nearest format" << format;
}
m_audioInput = new QAudioInput(m_audioInfo, format, this);
QObject::connect(m_audioInput, &QAudioInput::notify, this, [this](){
QByteArray readBytes = m_audioInputIODevice->readAll();
m_readAudioData.append(readBytes);
m_readAudioDataBytes += readBytes.count();
size_t nWords = m_writer->getWordSize() != 0 ?
static_cast<size_t>(m_readAudioDataBytes)/m_writer->getWordSize() :
static_cast<size_t>(m_readAudioDataBytes);
m_writer->write(m_readAudioData.data(), nWords);
m_readAudioData.clear();
m_readAudioDataBytes = 0;
});
int latency = static_cast<int>(LATENCY * 1000);
m_audioInput->setNotifyInterval(latency);
qDebug("QtMicrophoneWrapper: Latency is configured to: %d ms", m_audioInput->notifyInterval());
}
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