// SPDX-License-Identifier: GPL-2.0-only
/**
* Digital Voice Modem - Hotspot Firmware
* GPLv2 Open Source. Use is subject to license terms.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* @package DVM / Hotspot Firmware
* @derivedfrom MMDVM_HS (https://github.com/g4klx/MMDVM_HS)
* @license GPLv2 License (https://opensource.org/licenses/GPL-2.0)
*
*   Copyright (C) 2015,2016 Jonathan Naylor, G4KLX
*   Copyright (C) 2016,2017,2018 Andy Uribe, CA6JAU
*   Copyright (C) 2021 Bryan Biedenkapp, N2PLL
*
*/
#if !defined(__DMR_DMO_RX_H__)
#define __DMR_DMO_RX_H__

#include "Defines.h"
#include "dmr/DMRDefines.h"

namespace dmr
{
    // ---------------------------------------------------------------------------
    //  Constants
    // ---------------------------------------------------------------------------

    const uint16_t DMO_BUFFER_LENGTH_BITS = 576U;

    enum DMORX_STATE {
        DMORXS_NONE,
        DMORXS_VOICE,
        DMORXS_DATA
    };

    // ---------------------------------------------------------------------------
    //  Class Declaration
    //      Implements receiver logic for DMR DMO mode operation.
    // ---------------------------------------------------------------------------

    class DSP_FW_API DMRDMORX {
    public:
        /// <summary>Initializes a new instance of the DMRDMORX class.</summary>
        DMRDMORX();

        /// <summary>Helper to reset data values to defaults.</summary>
        void reset();

        /// <summary>Sample DMR bits from the air interface.</summary>
        void databit(bool bit);

        /// <summary>Sets the DMR color code.</summary>
        void setColorCode(uint8_t colorCode);

    private:
        uint64_t m_bitBuffer;
        uint8_t m_buffer[DMO_BUFFER_LENGTH_BITS / 8U];  // 72 bytes

        uint8_t frame[DMR_FRAME_LENGTH_BYTES + 3U];

        uint16_t m_dataPtr;
        uint16_t m_syncPtr;
        uint16_t m_startPtr;
        uint16_t m_endPtr;

        uint8_t m_control;
        uint8_t m_syncCount;

        uint8_t m_colorCode;

        DMORX_STATE m_state;

        uint8_t m_n;

        uint8_t m_type;

        /// <summary>Frame synchronization correlator.</summary>
        void correlateSync();
        
        /// <summary></summary>
        void bitsToBytes(uint16_t start, uint8_t count, uint8_t* buffer);
        /// <summary></summary>
        void writeRSSIData(uint8_t* frame);
    };
} // namespace dmr

#endif // __DMR_DMO_RX_H__