portapack-mayhem/firmware/baseband/stream_output.hpp

/*
 * Copyright (C) 2016 Jared Boone, ShareBrained Technology, Inc.
 * Copyright (C) 2016 Furrtek
 *
 * This file is part of PortaPack.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2, or (at your option)
 * any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; see the file COPYING.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street,
 * Boston, MA 02110-1301, USA.
 */

#ifndef __STREAM_OUTPUT_H__
#define __STREAM_OUTPUT_H__

#include "message.hpp"
#include "fifo.hpp"

#include <cstdint>
#include <cstddef>
#include <array>
#include <memory>

class StreamOutput {
   public:
    StreamOutput(ReplayConfig* const config);

    StreamOutput(const StreamOutput&) = delete;
    StreamOutput(StreamOutput&&) = delete;
    StreamOutput& operator=(const StreamOutput&) = delete;
    StreamOutput& operator=(StreamOutput&&) = delete;

    size_t read(void* const data, const size_t length);

   private:
    static constexpr size_t buffer_count_max_log2 = 3;
    static constexpr size_t buffer_count_max = 1U << buffer_count_max_log2;

    FIFO<StreamBuffer*> fifo_buffers_empty;
    FIFO<StreamBuffer*> fifo_buffers_full;
    std::array<StreamBuffer, buffer_count_max> buffers{};
    std::array<StreamBuffer*, buffer_count_max> buffers_empty{};
    std::array<StreamBuffer*, buffer_count_max> buffers_full{};
    StreamBuffer* active_buffer{nullptr};
    ReplayConfig* const config{nullptr};
    std::unique_ptr<uint8_t[]> data{};
};

#endif /*__STREAM_OUTPUT_H__*/