163 lines
4.3 KiB
C++
163 lines
4.3 KiB
C++
/*
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* Copyright (C) 2015 Jared Boone, ShareBrained Technology, Inc.
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* Copyright (C) 2016 Furrtek
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*
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* This file is part of PortaPack.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street,
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* Boston, MA 02110-1301, USA.
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*/
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#include "proc_tones.hpp"
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#include "sine_table_int8.hpp"
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#include "event_m4.hpp"
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#include <cstdint>
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// This is called at 1536000/2048 = 750Hz
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void TonesProcessor::execute(const buffer_c8_t& buffer) {
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if (!configured) return;
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ai = 0;
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for (size_t i = 0; i < buffer.count; i++) {
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// Tone generation at full samplerate
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if (silence_count) {
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// Just occupy channel with carrier
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silence_count--;
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if (!silence_count) {
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sample_count = 0;
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tone_a_phase = 0;
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tone_b_phase = 0;
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}
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tone_sample = 0;
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re = 0;
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im = 0;
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} else {
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if (!sample_count) {
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digit = shared_memory.bb_data.tones_data.message[digit_pos];
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if (digit_pos >= message_length) {
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configured = false;
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txprogress_message.done = true;
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shared_memory.application_queue.push(txprogress_message);
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return;
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} else {
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txprogress_message.progress = digit_pos; // Inform UI about progress
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txprogress_message.done = false;
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shared_memory.application_queue.push(txprogress_message);
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}
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digit_pos++;
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if (digit >= 32) { // || (tone_deltas[digit] == 0)
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sample_count = shared_memory.bb_data.tones_data.silence;
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} else {
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if (!dual_tone) {
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tone_a_delta = tone_deltas[digit];
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} else {
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tone_a_delta = tone_deltas[digit << 1];
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tone_b_delta = tone_deltas[(digit << 1) + 1];
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}
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sample_count = tone_durations[digit];
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}
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} else {
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sample_count--;
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}
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// Ugly
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if ((digit >= 32) || (tone_deltas[digit] == 0)) {
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tone_sample = 0;
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} else {
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if (!dual_tone) {
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tone_sample = (sine_table_i8[(tone_a_phase & 0xFF000000U) >> 24]);
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tone_a_phase += tone_a_delta;
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} else {
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tone_sample = sine_table_i8[(tone_a_phase & 0xFF000000U) >> 24] >> 1;
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tone_sample += sine_table_i8[(tone_b_phase & 0xFF000000U) >> 24] >> 1;
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tone_a_phase += tone_a_delta;
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tone_b_phase += tone_b_delta;
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}
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}
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// FM
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delta = tone_sample * fm_delta;
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phase += delta;
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sphase = phase + (64 << 24);
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re = (sine_table_i8[(sphase & 0xFF000000U) >> 24]);
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im = (sine_table_i8[(phase & 0xFF000000U) >> 24]);
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}
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// Headphone output sample generation: 1536000/24000 = 64
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if (audio_out) {
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if (!as) {
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as = 64;
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audio_buffer.p[ai++] = tone_sample * 128;
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} else {
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as--;
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}
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}
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buffer.p[i] = {re, im};
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}
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if (audio_out) audio_output.write(audio_buffer);
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}
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void TonesProcessor::on_message(const Message* const p) {
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const auto message = *reinterpret_cast<const TonesConfigureMessage*>(p);
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if (message.id == Message::ID::TonesConfigure) {
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message_length = message.tone_count;
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if (message_length) {
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silence_count = message.pre_silence; // In samples
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for (uint8_t c = 0; c < 32; c++) {
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tone_deltas[c] = shared_memory.bb_data.tones_data.tone_defs[c].delta;
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tone_durations[c] = shared_memory.bb_data.tones_data.tone_defs[c].duration;
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}
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fm_delta = message.fm_delta * (0xFFFFFFULL / 1536000);
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audio_out = message.audio_out;
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dual_tone = message.dual_tone;
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if (audio_out) audio_output.configure(false);
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txprogress_message.done = false;
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txprogress_message.progress = 0;
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digit_pos = 0;
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sample_count = 0;
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tone_a_phase = 0;
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tone_b_phase = 0;
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as = 0;
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configured = true;
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} else {
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configured = false;
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txprogress_message.done = true;
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shared_memory.application_queue.push(txprogress_message);
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}
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}
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}
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int main() {
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EventDispatcher event_dispatcher { std::make_unique<TonesProcessor>() };
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event_dispatcher.run();
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return 0;
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}
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