SpeechEncoder.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_SPEECHENCODER_INCLUDE_SPEECHENCODER_SPEECHENCODER_H_
#define ALEXA_CLIENT_SDK_SPEECHENCODER_INCLUDE_SPEECHENCODER_SPEECHENCODER_H_
 
#include <atomic>
#include <memory>
#include <thread>
 
#include <AVSCommon/AVS/AudioInputStream.h>
#include <AVSCommon/Utils/AudioFormat.h>
#include <AVSCommon/Utils/Threading/Executor.h>
 
#include "EncoderContext.h"
 
namespace alexaClientSDK {
namespace speechencoder {
 
class SpeechEncoder {
public:
    static std::shared_ptr<SpeechEncoder> createSpeechEncoder(const std::shared_ptr<EncoderContext>& encoder);
 
    SpeechEncoder(const std::shared_ptr<EncoderContext>& encoder);
 
    ~SpeechEncoder();
 
    bool startEncoding(
        const std::shared_ptr<alexaClientSDK::avsCommon::avs::AudioInputStream>& inputStream,
        alexaClientSDK::avsCommon::utils::AudioFormat inputFormat,
        avsCommon::avs::AudioInputStream::Index begin,
        avsCommon::avs::AudioInputStream::Reader::Reference reference);
 
    void stopEncoding(bool stopImmediately = false);
 
    std::shared_ptr<alexaClientSDK::avsCommon::avs::AudioInputStream> getEncodedStream();
 
    std::shared_ptr<EncoderContext> getContext();
 
private:
    void encodeLoop(
        avsCommon::avs::AudioInputStream::Index begin,
        avsCommon::avs::AudioInputStream::Reader::Reference reference);
 
    std::shared_ptr<EncoderContext> m_encoder;
 
    alexaClientSDK::avsCommon::utils::AudioFormat m_inputAudioFormat;
 
    std::shared_ptr<alexaClientSDK::avsCommon::avs::AudioInputStream> m_inputStream;
 
    alexaClientSDK::avsCommon::utils::AudioFormat m_outputAudioFormat;
 
    size_t m_maxFrameSize;
 
    std::shared_ptr<alexaClientSDK::avsCommon::avs::AudioInputStream> m_encodedStream;
 
    std::atomic<bool> m_isEncoding;
 
    std::atomic<bool> m_stopRequested;
 
    avsCommon::utils::threading::Executor m_executor;
 
    std::mutex m_mutex;
};
 
}  // namespace speechencoder
}  // namespace alexaClientSDK
 
#endif  // ALEXA_CLIENT_SDK_SPEECHENCODER_INCLUDE_SPEECHENCODER_SPEECHENCODER_H_