AudioInjectorMicrophone.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_DIAGNOSTICS_INCLUDE_DIAGNOSTICS_AUDIOINJECTORMICROPHONE_H_
#define ALEXA_CLIENT_SDK_DIAGNOSTICS_INCLUDE_DIAGNOSTICS_AUDIOINJECTORMICROPHONE_H_

#include <memory>
#include <mutex>
#include <thread>

#include <AVSCommon/AVS/AudioInputStream.h>
#include <AVSCommon/Utils/AudioFormat.h>
#include <AVSCommon/Utils/Timing/Timer.h>
#include <Audio/MicrophoneInterface.h>

#include "Diagnostics/DiagnosticsUtils.h"

namespace alexaClientSDK {
namespace diagnostics {

class AudioInjectorMicrophone : public applicationUtilities::resources::audio::MicrophoneInterface {
public:
    static std::unique_ptr<AudioInjectorMicrophone> create(
        const std::shared_ptr<avsCommon::avs::AudioInputStream>& stream,
        const alexaClientSDK::avsCommon::utils::AudioFormat& compatibleAudioFormat);

    bool stopStreamingMicrophoneData() override;
    bool startStreamingMicrophoneData() override;
    bool isStreaming() override;

    void injectAudio(const std::vector<uint16_t>& audioData);

    ~AudioInjectorMicrophone();

private:
    AudioInjectorMicrophone(
        const std::shared_ptr<avsCommon::avs::AudioInputStream>& stream,
        const alexaClientSDK::avsCommon::utils::AudioFormat& compatibleAudioFormat);

    /*
     * Reset m_injectionData to empty and m_injectionDataCounter to 0.
     */
    void resetAudioInjection();

    bool initialize();

    void startTimer();

    void write();

    const std::shared_ptr<avsCommon::avs::AudioInputStream> m_audioInputStream;

    std::mutex m_mutex;

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

    bool m_isStreaming;

    avsCommon::utils::timing::Timer m_timer;

    unsigned int m_maxSampleCountPerTimeout;

    alexaClientSDK::avsCommon::avs::AudioInputStream::Buffer m_silenceBuffer;

    std::vector<uint16_t> m_injectionData;

    unsigned long m_injectionDataCounter;
};

}  // namespace diagnostics
}  // namespace alexaClientSDK

#endif  // ALEXA_CLIENT_SDK_DIAGNOSTICS_INCLUDE_DIAGNOSTICS_AUDIOINJECTORMICROPHONE_H_