OpenCloseDevice.h

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/*******************************************************************************
 * Copyright 2009-2024 Jörg Müller
 *
 * 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.
 ******************************************************************************/
 
#pragma once

 
#include <chrono>
#include <condition_variable>
#include <thread>
 
#include "devices/SoftwareDevice.h"
 
AUD_NAMESPACE_BEGIN

class AUD_PLUGIN_API OpenCloseDevice : public SoftwareDevice
{
private:
    bool m_device_opened{false};

    bool m_playing{false};

    bool m_delayed_close_running{false};

    std::thread m_delayed_close_thread;

    std::mutex m_delayed_close_mutex;

    std::condition_variable m_immediate_close_condition;

    std::chrono::milliseconds m_device_close_delay{10000};

    std::chrono::time_point<std::chrono::steady_clock> m_playback_stopped_time;

    void closeAfterDelay();

    AUD_LOCAL virtual void start() = 0;

    AUD_LOCAL virtual void stop() = 0;

    AUD_LOCAL virtual void open() = 0;

    AUD_LOCAL virtual void close() = 0;
 
    // delete copy constructor and operator=
    OpenCloseDevice(const OpenCloseDevice&) = delete;
    OpenCloseDevice& operator=(const OpenCloseDevice&) = delete;
 
protected:
    OpenCloseDevice() = default;
 
    void closeNow();
 
    virtual void playing(bool playing);
};
 
AUD_NAMESPACE_END