mayhem-firmware/firmware/baseband/proc_sstvtx.hpp

/*
 * Copyright (C) 2015 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 __PROC_SSTV_TX_H__
#define __PROC_SSTV_TX_H__

#include "portapack_shared_memory.hpp"
#include "baseband_processor.hpp"
#include "baseband_thread.hpp"
#include "sstv.hpp"

using namespace sstv;

class SSTVTXProcessor : public BasebandProcessor {
   public:
    void execute(const buffer_c8_t& buffer) override;
    void on_message(const Message* const p) override;

   private:
    // 1900 300ms
    // 1200 10ms
    // 1900 300ms
    const std::pair<uint32_t, uint32_t> calibration_sequence[3] = {
        {SSTV_F2D(1900), SSTV_MS2S(300)},
        {SSTV_F2D(1200), SSTV_MS2S(10)},
        {SSTV_F2D(1900), SSTV_MS2S(300)}};

    enum state_t {
        STATE_CALIBRATION = 0,
        STATE_VIS,
        STATE_SYNC,
        STATE_PIXELS
    };

    state_t state{};

    bool configured{false};

    uint32_t vis_code_sequence[10]{};
    sstv_scanline scanline_buffer[2]{};
    uint8_t buffer_flip{0}, substep{0};
    uint32_t pixel_duration{};

    sstv_scanline* current_scanline{};

    uint8_t pixel_luma{};
    uint32_t fm_delta{0};
    uint32_t tone_phase{0};
    uint32_t tone_delta{0};
    uint32_t pixel_index{0};
    uint32_t sample_count{0};
    uint32_t phase{0}, sphase{0};
    int32_t tone_sample{0}, delta{0};
    int8_t re{}, im{};

    RequestSignalMessage sig_message{RequestSignalMessage::Signal::FillRequest};

    /* NB: Threads should be the last members in the class definition. */
    BasebandThread baseband_thread{3072000, this, baseband::Direction::Transmit};
};

#endif