src/opensles/EngineOpenSLES.h

/*
 * Copyright 2017 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef OBOE_ENGINE_OPENSLES_H
#define OBOE_ENGINE_OPENSLES_H

#include <atomic>
#include <mutex>

#include <SLES/OpenSLES.h>
#include <SLES/OpenSLES_Android.h>

namespace oboe {

/**
 * INTERNAL USE ONLY
 */
class EngineOpenSLES {
public:
    static EngineOpenSLES &getInstance();

    SLresult open();

    void close();

    SLresult createOutputMix(SLObjectItf *objectItf);

    SLresult createAudioPlayer(SLObjectItf *objectItf,
                               SLDataSource *audioSource,
                               SLDataSink *audioSink);
    SLresult createAudioRecorder(SLObjectItf *objectItf,
                                 SLDataSource *audioSource,
                                 SLDataSink *audioSink);

private:
    // Make this a safe Singleton
    EngineOpenSLES()= default;
    ~EngineOpenSLES()= default;
    EngineOpenSLES(const EngineOpenSLES&)= delete;
    EngineOpenSLES& operator=(const EngineOpenSLES&)= delete;

    std::mutex             mLock;
    int32_t                mOpenCount = 0;

    SLObjectItf            mEngineObject = nullptr;
    SLEngineItf            mEngineInterface = nullptr;
};

} // namespace oboe


#endif //OBOE_ENGINE_OPENSLES_H