OpenSL ES audio plugin.
Adds support for QAudioOutput, QAudioInput and QAudioDeviceInfo using OpenSL ES 1.0.1. This plugin is used on Android. Change-Id: Idf2c22a861e067196f6c5139e51393b086f64183 Reviewed-by: Christian Stromme <christian.stromme@digia.com>
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Yoann Lopes
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The Qt Project
The Qt Project
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207
src/plugins/opensles/qopenslesengine.cpp
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207
src/plugins/opensles/qopenslesengine.cpp
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/****************************************************************************
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**
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** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
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** Contact: http://www.qt-project.org/legal
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**
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** This file is part of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and Digia. For licensing terms and
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** conditions see http://qt.digia.com/licensing. For further information
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** use the contact form at http://qt.digia.com/contact-us.
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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, Digia gives you certain additional
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** rights. These rights are described in the Digia 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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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License version 3.0 as published by the Free Software
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** Foundation and appearing in the file LICENSE.GPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU General Public License version 3.0 requirements will be
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** met: http://www.gnu.org/copyleft/gpl.html.
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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 "qopenslesengine.h"
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#include "qopenslesaudioinput.h"
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#include <qdebug.h>
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#ifdef ANDROID
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#include <SLES/OpenSLES_Android.h>
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#endif
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#define CheckError(message) if (result != SL_RESULT_SUCCESS) { qWarning(message); return; }
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Q_GLOBAL_STATIC(QOpenSLESEngine, openslesEngine);
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QOpenSLESEngine::QOpenSLESEngine()
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: m_engineObject(0)
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, m_engine(0)
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{
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SLresult result;
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result = slCreateEngine(&m_engineObject, 0, 0, 0, 0, 0);
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CheckError("Failed to create engine");
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result = (*m_engineObject)->Realize(m_engineObject, SL_BOOLEAN_FALSE);
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CheckError("Failed to realize engine");
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result = (*m_engineObject)->GetInterface(m_engineObject, SL_IID_ENGINE, &m_engine);
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CheckError("Failed to get engine interface");
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checkSupportedInputFormats();
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}
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QOpenSLESEngine::~QOpenSLESEngine()
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{
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if (m_engineObject)
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(*m_engineObject)->Destroy(m_engineObject);
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}
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QOpenSLESEngine *QOpenSLESEngine::instance()
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{
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return openslesEngine();
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}
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SLDataFormat_PCM QOpenSLESEngine::audioFormatToSLFormatPCM(const QAudioFormat &format)
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{
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SLDataFormat_PCM format_pcm;
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format_pcm.formatType = SL_DATAFORMAT_PCM;
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format_pcm.numChannels = format.channelCount();
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format_pcm.samplesPerSec = format.sampleRate() * 1000;
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format_pcm.bitsPerSample = format.sampleSize();
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format_pcm.containerSize = format.sampleSize();
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format_pcm.channelMask = (format.channelCount() == 1 ?
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SL_SPEAKER_FRONT_CENTER :
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SL_SPEAKER_FRONT_LEFT | SL_SPEAKER_FRONT_RIGHT);
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format_pcm.endianness = (format.byteOrder() == QAudioFormat::LittleEndian ?
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SL_BYTEORDER_LITTLEENDIAN :
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SL_BYTEORDER_BIGENDIAN);
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return format_pcm;
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}
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QList<QByteArray> QOpenSLESEngine::availableDevices(QAudio::Mode mode) const
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{
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QList<QByteArray> devices;
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if (mode == QAudio::AudioInput) {
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#ifdef ANDROID
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devices << QT_ANDROID_PRESET_MIC
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<< QT_ANDROID_PRESET_CAMCORDER
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<< QT_ANDROID_PRESET_VOICE_RECOGNITION;
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#else
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devices << "default";
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#endif
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} else {
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devices << "default";
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}
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return devices;
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}
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QList<int> QOpenSLESEngine::supportedChannelCounts(QAudio::Mode mode) const
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{
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if (mode == QAudio::AudioInput)
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return m_supportedInputChannelCounts;
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else
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return QList<int>() << 1 << 2;
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}
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QList<int> QOpenSLESEngine::supportedSampleRates(QAudio::Mode mode) const
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{
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if (mode == QAudio::AudioInput) {
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return m_supportedInputSampleRates;
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} else {
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return QList<int>() << 8000 << 11025 << 12000 << 16000 << 22050
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<< 24000 << 32000 << 44100 << 48000;
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}
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}
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void QOpenSLESEngine::checkSupportedInputFormats()
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{
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m_supportedInputChannelCounts = QList<int>() << 1;
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m_supportedInputSampleRates.clear();
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SLDataFormat_PCM defaultFormat;
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defaultFormat.formatType = SL_DATAFORMAT_PCM;
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defaultFormat.numChannels = 1;
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defaultFormat.samplesPerSec = SL_SAMPLINGRATE_44_1;
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defaultFormat.bitsPerSample = SL_PCMSAMPLEFORMAT_FIXED_16;
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defaultFormat.containerSize = SL_PCMSAMPLEFORMAT_FIXED_16;
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defaultFormat.channelMask = SL_SPEAKER_FRONT_CENTER;
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defaultFormat.endianness = SL_BYTEORDER_LITTLEENDIAN;
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const SLuint32 rates[9] = { SL_SAMPLINGRATE_8,
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SL_SAMPLINGRATE_11_025,
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SL_SAMPLINGRATE_12,
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SL_SAMPLINGRATE_16,
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SL_SAMPLINGRATE_22_05,
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SL_SAMPLINGRATE_24,
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SL_SAMPLINGRATE_32,
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SL_SAMPLINGRATE_44_1,
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SL_SAMPLINGRATE_48 };
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// Test sampling rates
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for (int i = 0 ; i < 9; ++i) {
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SLDataFormat_PCM format = defaultFormat;
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format.samplesPerSec = rates[i];
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if (inputFormatIsSupported(format))
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m_supportedInputSampleRates.append(rates[i] / 1000);
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}
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// Test if stereo is supported
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{
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SLDataFormat_PCM format = defaultFormat;
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format.numChannels = 2;
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format.channelMask = 0;
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if (inputFormatIsSupported(format))
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m_supportedInputChannelCounts.append(2);
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}
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}
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bool QOpenSLESEngine::inputFormatIsSupported(SLDataFormat_PCM format)
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{
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SLresult result;
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SLObjectItf recorder = 0;
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SLDataLocator_IODevice loc_dev = { SL_DATALOCATOR_IODEVICE, SL_IODEVICE_AUDIOINPUT,
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SL_DEFAULTDEVICEID_AUDIOINPUT, NULL };
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SLDataSource audioSrc = { &loc_dev, NULL };
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#ifdef ANDROID
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SLDataLocator_AndroidSimpleBufferQueue loc_bq = { SL_DATALOCATOR_ANDROIDSIMPLEBUFFERQUEUE, 1 };
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#else
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SLDataLocator_BufferQueue loc_bq = { SL_DATALOCATOR_BUFFERQUEUE, 1 };
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#endif
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SLDataSink audioSnk = { &loc_bq, &format };
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result = (*m_engine)->CreateAudioRecorder(m_engine, &recorder, &audioSrc, &audioSnk, 0, 0, 0);
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if (result == SL_RESULT_SUCCESS)
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result = (*recorder)->Realize(recorder, false);
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if (result == SL_RESULT_SUCCESS) {
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(*recorder)->Destroy(recorder);
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return true;
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}
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return false;
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}
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