AndroidSLESBufferQueue.h

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/*
 * Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License").
 * You may not use this file except in compliance with the License.
 * A copy of the License is located at
 *
 *     http://aws.amazon.com/apache2.0/
 *
 * or in the "license" file accompanying this file. This file 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 ALEXA_CLIENT_SDK_APPLICATIONUTILITIES_ANDROIDUTILITIES_INCLUDE_ANDROIDUTILITIES_ANDROIDSLESBUFFERQUEUE_H_
#define ALEXA_CLIENT_SDK_APPLICATIONUTILITIES_ANDROIDUTILITIES_INCLUDE_ANDROIDUTILITIES_ANDROIDSLESBUFFERQUEUE_H_

#include <array>
#include <vector>

#include <SLES/OpenSLES_Android.h>

#include <AVSCommon/AVS/AudioInputStream.h>
#include <AndroidUtilities/AndroidSLESObject.h>

namespace alexaClientSDK {
namespace applicationUtilities {
namespace androidUtilities {

class AndroidSLESBufferQueue {
public:
    static std::unique_ptr<AndroidSLESBufferQueue> create(
        std::shared_ptr<AndroidSLESObject> queueObject,
        std::shared_ptr<avsCommon::avs::AudioInputStream::Writer> writer);

    void onBufferCompleted();

    bool enqueueBuffers();

    bool clearBuffers();

    ~AndroidSLESBufferQueue();

    static constexpr uint32_t NUMBER_OF_BUFFERS{2u};

private:
    AndroidSLESBufferQueue(
        std::shared_ptr<AndroidSLESObject> slObject,
        SLAndroidSimpleBufferQueueItf bufferQueue,
        std::shared_ptr<avsCommon::avs::AudioInputStream::Writer> writer);

    bool enqueueBufferLocked();

    static constexpr size_t BUFFER_SIZE{8192u};

    std::mutex m_mutex;

    std::shared_ptr<AndroidSLESObject> m_slObject;

    SLAndroidSimpleBufferQueueItf m_queueInterface;

    std::array<std::array<int16_t, BUFFER_SIZE>, NUMBER_OF_BUFFERS> m_buffers;

    std::shared_ptr<avsCommon::avs::AudioInputStream::Writer> m_writer;

    std::size_t m_index;
};

}  // namespace androidUtilities
}  // namespace applicationUtilities
}  // namespace alexaClientSDK

#endif  // ALEXA_CLIENT_SDK_APPLICATIONUTILITIES_ANDROIDUTILITIES_INCLUDE_ANDROIDUTILITIES_ANDROIDSLESBUFFERQUEUE_H_