portapack-mayhem/firmware/baseband/proc_mictx.cpp

/*
 * 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.
 */

#include "proc_mictx.hpp"
#include "portapack_shared_memory.hpp"
#include "sine_table_int8.hpp"
#include "tonesets.hpp"
#include "event_m4.hpp"
#include "audio_dma.hpp"

#include <cstdint>

void MicTXProcessor::execute(const buffer_c8_t& buffer) {
    // This is called at 1536000/2048 = 750Hz

    if (!configured) return;

    audio_input.read_audio_buffer(audio_buffer);
    modulator->set_gain_shiftbits_vumeter_beep(audio_gain, audio_shift_bits_s16, play_beep);
    modulator->execute(audio_buffer, buffer, configured, beep_index, beep_timer, txprogress_message, level_message, power_acc_count, divider);  // Now "Key Tones & CTCSS" baseband additon inside FM mod. dsp_modulate.cpp"

    /* Original fw 1.3.1  good reference, beep and vu-meter
        for (size_t i = 0; i < buffer.count; i++) {

                if (!play_beep) {
                        sample = audio_buffer.p[i >> 6] >> 8;			// 1536000 / 64 = 24000
                        sample *= audio_gain;

                        power_acc += (sample < 0) ? -sample : sample;	// Power average for UI vu-meter

                        if (power_acc_count) {
                                power_acc_count--;
                        } else {
                                power_acc_count = divider;
                                level_message.value = power_acc / (divider / 4);	// Why ?
                                shared_memory.application_queue.push(level_message);
                                power_acc = 0;
                        }
                } else {
                        if (beep_timer) {
                                beep_timer--;
                        } else {
                                beep_timer = baseband_fs * 0.05;			// 50ms

                                if (beep_index == BEEP_TONES_NB) {
                                        configured = false;
                                        shared_memory.application_queue.push(txprogress_message);
                                } else {
                                        beep_gen.configure(beep_deltas[beep_index], 1.0);
                                        beep_index++;
                                }
                        }
                        sample = beep_gen.process(0);    // TODO : Pending how to move inside modulate.cpp
                }
         */

    /* Original fw 1.3.1  good reference FM moulation version, including "key tones CTCSS"  fw 1.3.1
                sample = tone_gen.process(sample);

                // FM
                if (configured) {
                        delta = sample * fm_delta;

                        phase += delta;
                        sphase = phase >> 24;

                        re = (sine_table_i8[(sphase + 64) & 255]);
                        im = (sine_table_i8[sphase]);
                } else {
                        re = 0;
                        im = 0;
                }

                buffer.p[i] = { re, im };

        }  */
}

void MicTXProcessor::on_message(const Message* const msg) {
    const AudioTXConfigMessage config_message = *reinterpret_cast<const AudioTXConfigMessage*>(msg);
    const RequestSignalMessage request_message = *reinterpret_cast<const RequestSignalMessage*>(msg);

    switch (msg->id) {
        case Message::ID::AudioTXConfig:
            if (fm_enabled) {
                dsp::modulate::FM* fm = new dsp::modulate::FM();

                // Config fm_delta private var inside DSP modulate.cpp
                fm->set_fm_delta(config_message.deviation_hz * (0xFFFFFFUL / baseband_fs));

                // Config properly the private tone_gen function parameters inside DSP modulate.cpp
                fm->set_tone_gen_configure(config_message.tone_key_delta, config_message.tone_key_mix_weight);
                modulator = fm;
            }

            if (usb_enabled) {
                dsp::modulate::SSB* ssb = new dsp::modulate::SSB();

                // Config fs_div_factor  private var inside DSP modulate.cpp
                ssb->set_fs_div_factor(config_message.deviation_hz);  // we use same FM var deviation_hz , to set up also SSB BW
                ssb->set_mode(dsp::modulate::Mode::USB);
                modulator = ssb;

                // modulator = new dsp::modulate::SSB();             // Keeping previous code as ref., when not passing deviation_hz parameter.
                // modulator->set_mode(dsp::modulate::Mode::USB);
            }

            if (lsb_enabled) {
                dsp::modulate::SSB* ssb = new dsp::modulate::SSB();

                // Config fs_div_factor  private var inside DSP modulate.cpp
                ssb->set_fs_div_factor(config_message.deviation_hz);  // we use same FM var deviation_hz , to set up also SSB BW
                ssb->set_mode(dsp::modulate::Mode::LSB);
                modulator = ssb;

                // modulator = new dsp::modulate::SSB();             // Keeping previous code as ref., when not passing deviation_hz parameter.
                // modulator->set_mode(dsp::modulate::Mode::LSB);
            }
            if (am_enabled) {
                modulator = new dsp::modulate::AM();
                modulator->set_mode(dsp::modulate::Mode::AM);
            }
            if (dsb_enabled) {
                modulator = new dsp::modulate::AM();
                modulator->set_mode(dsp::modulate::Mode::DSB);
            }

            modulator->set_over(baseband_fs / 24000);  // "over" is calculated based on relationship fs_transceiver / fs_audio_mic_capture, to be used in dsp_modulate.cpp

            am_enabled = config_message.am_enabled;
            usb_enabled = config_message.usb_enabled;
            lsb_enabled = config_message.lsb_enabled;
            dsb_enabled = config_message.dsb_enabled;
            if (!am_enabled || !usb_enabled || !lsb_enabled || !dsb_enabled) {
                fm_enabled = true;
            }

            audio_gain = config_message.audio_gain;
            audio_shift_bits_s16 = config_message.audio_shift_bits_s16;
            divider = config_message.divider;
            power_acc_count = 0;

            // now this config  moved, in the case Message::ID::AudioTXConfig , only FM case.
            // tone_gen.configure(config_message.tone_key_delta, config_message.tone_key_mix_weight);

            txprogress_message.done = true;

            play_beep = false;
            configured = true;
            break;

        case Message::ID::RequestSignal:
            if (request_message.signal == RequestSignalMessage::Signal::RogerBeepRequest) {
                beep_index = 0;
                beep_timer = 0;
                play_beep = true;
            }
            break;

        default:
            break;
    }
}

int main() {
    audio::dma::init_audio_in();

    EventDispatcher event_dispatcher{std::make_unique<MicTXProcessor>()};
    event_dispatcher.run();
    return 0;
}