PortAudioMicrophoneWrapper.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_LIBIPCSERVERSAMPLEAPP_INCLUDE_IPCSERVERSAMPLEAPP_PORTAUDIOMICROPHONEWRAPPER_H_
#define ALEXA_CLIENT_SDK_LIBIPCSERVERSAMPLEAPP_INCLUDE_IPCSERVERSAMPLEAPP_PORTAUDIOMICROPHONEWRAPPER_H_

#include <mutex>
#include <thread>

#include <AVSCommon/AVS/AudioInputStream.h>

#include <portaudio.h>
#include <Audio/MicrophoneInterface.h>

namespace alexaClientSDK {
namespace sampleApplications {
namespace ipcServerSampleApp {

class PortAudioMicrophoneWrapper : public applicationUtilities::resources::audio::MicrophoneInterface {
public:
    static std::unique_ptr<PortAudioMicrophoneWrapper> create(std::shared_ptr<avsCommon::avs::AudioInputStream> stream);

    bool stopStreamingMicrophoneData() override;

    bool startStreamingMicrophoneData() override;

    bool isStreaming() override;

    ~PortAudioMicrophoneWrapper();

private:
    PortAudioMicrophoneWrapper(std::shared_ptr<avsCommon::avs::AudioInputStream> stream);

    static int PortAudioCallback(
        const void* inputBuffer,
        void* outputBuffer,
        unsigned long numSamples,
        const PaStreamCallbackTimeInfo* timeInfo,
        PaStreamCallbackFlags statusFlags,
        void* userData);

    bool initialize();

    bool getConfigSuggestedLatency(PaTime& suggestedLatency);

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

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

    PaStream* m_paStream;

    std::mutex m_mutex;

    bool m_isStreaming;
};

}  // namespace ipcServerSampleApp
}  // namespace sampleApplications
}  // namespace alexaClientSDK

#endif  // ALEXA_CLIENT_SDK_LIBIPCSERVERSAMPLEAPP_INCLUDE_IPCSERVERSAMPLEAPP_PORTAUDIOMICROPHONEWRAPPER_H_