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/****************************************************************************
**
** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL21$
** 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 Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/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 2.1 or version 3 as published by the Free
** Software Foundation and appearing in the file LICENSE.LGPLv21 and
** LICENSE.LGPLv3 included in the packaging of this file. Please review the
** following information to ensure the GNU Lesser General Public License
** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights. These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qopenslesengine.h"
#include "qopenslesaudioinput.h"
#include <qdebug.h>
#ifdef ANDROID
#include <SLES/OpenSLES_Android.h>
#endif
#define CheckError(message) if (result != SL_RESULT_SUCCESS) { qWarning(message); return; }
Q_GLOBAL_STATIC(QOpenSLESEngine, openslesEngine);
QOpenSLESEngine::QOpenSLESEngine()
: m_engineObject(0)
, m_engine(0)
, m_checkedInputFormats(false)
{
SLresult result;
result = slCreateEngine(&m_engineObject, 0, 0, 0, 0, 0);
CheckError("Failed to create engine");
result = (*m_engineObject)->Realize(m_engineObject, SL_BOOLEAN_FALSE);
CheckError("Failed to realize engine");
result = (*m_engineObject)->GetInterface(m_engineObject, SL_IID_ENGINE, &m_engine);
CheckError("Failed to get engine interface");
}
QOpenSLESEngine::~QOpenSLESEngine()
{
if (m_engineObject)
(*m_engineObject)->Destroy(m_engineObject);
}
QOpenSLESEngine *QOpenSLESEngine::instance()
{
return openslesEngine();
}
SLDataFormat_PCM QOpenSLESEngine::audioFormatToSLFormatPCM(const QAudioFormat &format)
{
SLDataFormat_PCM format_pcm;
format_pcm.formatType = SL_DATAFORMAT_PCM;
format_pcm.numChannels = format.channelCount();
format_pcm.samplesPerSec = format.sampleRate() * 1000;
format_pcm.bitsPerSample = format.sampleSize();
format_pcm.containerSize = format.sampleSize();
format_pcm.channelMask = (format.channelCount() == 1 ?
SL_SPEAKER_FRONT_CENTER :
SL_SPEAKER_FRONT_LEFT | SL_SPEAKER_FRONT_RIGHT);
format_pcm.endianness = (format.byteOrder() == QAudioFormat::LittleEndian ?
SL_BYTEORDER_LITTLEENDIAN :
SL_BYTEORDER_BIGENDIAN);
return format_pcm;
}
QList<QByteArray> QOpenSLESEngine::availableDevices(QAudio::Mode mode) const
{
QList<QByteArray> devices;
if (mode == QAudio::AudioInput) {
#ifdef ANDROID
devices << QT_ANDROID_PRESET_MIC
<< QT_ANDROID_PRESET_CAMCORDER
<< QT_ANDROID_PRESET_VOICE_RECOGNITION;
#else
devices << "default";
#endif
} else {
devices << "default";
}
return devices;
}
QList<int> QOpenSLESEngine::supportedChannelCounts(QAudio::Mode mode) const
{
if (mode == QAudio::AudioInput) {
if (!m_checkedInputFormats)
const_cast<QOpenSLESEngine *>(this)->checkSupportedInputFormats();
return m_supportedInputChannelCounts;
} else {
return QList<int>() << 1 << 2;
}
}
QList<int> QOpenSLESEngine::supportedSampleRates(QAudio::Mode mode) const
{
if (mode == QAudio::AudioInput) {
if (!m_checkedInputFormats)
const_cast<QOpenSLESEngine *>(this)->checkSupportedInputFormats();
return m_supportedInputSampleRates;
} else {
return QList<int>() << 8000 << 11025 << 12000 << 16000 << 22050
<< 24000 << 32000 << 44100 << 48000;
}
}
void QOpenSLESEngine::checkSupportedInputFormats()
{
m_supportedInputChannelCounts = QList<int>() << 1;
m_supportedInputSampleRates.clear();
SLDataFormat_PCM defaultFormat;
defaultFormat.formatType = SL_DATAFORMAT_PCM;
defaultFormat.numChannels = 1;
defaultFormat.samplesPerSec = SL_SAMPLINGRATE_44_1;
defaultFormat.bitsPerSample = SL_PCMSAMPLEFORMAT_FIXED_16;
defaultFormat.containerSize = SL_PCMSAMPLEFORMAT_FIXED_16;
defaultFormat.channelMask = SL_SPEAKER_FRONT_CENTER;
defaultFormat.endianness = SL_BYTEORDER_LITTLEENDIAN;
const SLuint32 rates[9] = { SL_SAMPLINGRATE_8,
SL_SAMPLINGRATE_11_025,
SL_SAMPLINGRATE_12,
SL_SAMPLINGRATE_16,
SL_SAMPLINGRATE_22_05,
SL_SAMPLINGRATE_24,
SL_SAMPLINGRATE_32,
SL_SAMPLINGRATE_44_1,
SL_SAMPLINGRATE_48 };
// Test sampling rates
for (int i = 0 ; i < 9; ++i) {
SLDataFormat_PCM format = defaultFormat;
format.samplesPerSec = rates[i];
if (inputFormatIsSupported(format))
m_supportedInputSampleRates.append(rates[i] / 1000);
}
// Test if stereo is supported
{
SLDataFormat_PCM format = defaultFormat;
format.numChannels = 2;
format.channelMask = 0;
if (inputFormatIsSupported(format))
m_supportedInputChannelCounts.append(2);
}
m_checkedInputFormats = true;
}
bool QOpenSLESEngine::inputFormatIsSupported(SLDataFormat_PCM format)
{
SLresult result;
SLObjectItf recorder = 0;
SLDataLocator_IODevice loc_dev = { SL_DATALOCATOR_IODEVICE, SL_IODEVICE_AUDIOINPUT,
SL_DEFAULTDEVICEID_AUDIOINPUT, NULL };
SLDataSource audioSrc = { &loc_dev, NULL };
#ifdef ANDROID
SLDataLocator_AndroidSimpleBufferQueue loc_bq = { SL_DATALOCATOR_ANDROIDSIMPLEBUFFERQUEUE, 1 };
#else
SLDataLocator_BufferQueue loc_bq = { SL_DATALOCATOR_BUFFERQUEUE, 1 };
#endif
SLDataSink audioSnk = { &loc_bq, &format };
result = (*m_engine)->CreateAudioRecorder(m_engine, &recorder, &audioSrc, &audioSnk, 0, 0, 0);
if (result == SL_RESULT_SUCCESS)
result = (*recorder)->Realize(recorder, false);
if (result == SL_RESULT_SUCCESS) {
(*recorder)->Destroy(recorder);
return true;
}
return false;
}
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