226 lines
7.6 KiB
C++
226 lines
7.6 KiB
C++
/*
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* Copyright (C) 2020 Belousov Oleg
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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 "dsp_modulate.hpp"
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#include "sine_table_int8.hpp"
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#include "portapack_shared_memory.hpp"
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#include "tonesets.hpp"
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namespace dsp {
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namespace modulate {
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Modulator::~Modulator() {
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}
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Mode Modulator::get_mode() {
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return mode;
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}
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void Modulator::set_mode(Mode new_mode) {
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mode = new_mode;
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}
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void Modulator::set_over(uint32_t new_over) {
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over = new_over;
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}
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void Modulator::set_gain_vumeter_beep(float new_audio_gain , bool new_play_beep ) {
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audio_gain = new_audio_gain ;
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play_beep = new_play_beep;
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}
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int32_t Modulator::apply_beep(int32_t sample_in, bool& configured_in, uint32_t& new_beep_index, uint32_t& new_beep_timer, TXProgressMessage& new_txprogress_message ) {
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if (play_beep) { // We need to add audio beep sample.
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if (new_beep_timer) {
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new_beep_timer--;
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} else {
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new_beep_timer = baseband_fs * 0.05; // 50ms
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if (new_beep_index == BEEP_TONES_NB) {
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configured_in = false;
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shared_memory.application_queue.push(new_txprogress_message);
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} else {
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beep_gen.configure(beep_deltas[new_beep_index], 1.0); // config sequentially the audio beep tone.
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new_beep_index++;
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}
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}
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sample_in = beep_gen.process(0); // Get sample of the selected sequence of 6 beep tones , and overwrite audio sample. Mix 0%.
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}
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return sample_in; // Return audio mic scaled with gain , 8 bit sample or audio beep sample.
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}
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///
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SSB::SSB() : hilbert() {
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mode = Mode::LSB;
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}
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void SSB::execute(const buffer_s16_t& audio, const buffer_c8_t& buffer, bool& configured_in, uint32_t& new_beep_index, uint32_t& new_beep_timer,TXProgressMessage& new_txprogress_message, AudioLevelReportMessage& new_level_message, uint32_t& new_power_acc_count, uint32_t& new_divider ) {
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// No way to activate correctly the roger beep in this option, Maybe not enough M4 CPU power , Let's block roger beep in SSB selection by now .
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int32_t sample = 0;
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int8_t re = 0, im = 0;
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for (size_t counter = 0; counter < buffer.count; counter++) {
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if (counter % 128 == 0) {
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float i = 0.0, q = 0.0;
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sample = audio.p[counter / over] >> 2;
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sample *= audio_gain; // Apply GAIN Scale factor to the audio TX modulation.
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//switch (mode) {
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//case Mode::LSB:
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hilbert.execute(sample / 32768.0f, i, q);
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//case Mode::USB: hilbert.execute(sample / 32768.0f, q, i);
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//default: break;
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//}
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i *= 256.0f; // Original 64.0f, now x 4 (+12 dB's SSB BB modulation)
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q *= 256.0f; // Original 64.0f, now x 4 (+12 dB's SSB BB modulation)
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switch (mode) {
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case Mode::LSB: re = q; im = i; break;
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case Mode::USB: re = i; im = q; break;
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default: re = 0; im = 0; break;
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}
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//re = q;
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//im = i;
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//break;
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}
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buffer.p[counter] = { re, im };
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// Update vu-meter bar in the LCD screen.
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power_acc += (sample < 0) ? -sample : sample; // Power average for UI vu-meter
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if (new_power_acc_count) {
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new_power_acc_count--;
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} else { // power_acc_count = 0
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new_power_acc_count = new_divider;
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new_level_message.value = power_acc / (new_divider *8); // Why ? . This division is to adj vu-meter sentitivity, to match saturation point to red-muter .
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shared_memory.application_queue.push(new_level_message);
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power_acc = 0;
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}
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}
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}
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///
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FM::FM() {
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mode = Mode::FM;
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}
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void FM::set_fm_delta(uint32_t new_delta) {
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fm_delta = new_delta;
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}
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void FM::set_tone_gen_configure(const uint32_t set_delta, const float set_tone_mix_weight) {
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tone_gen.configure(set_delta, set_tone_mix_weight);
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}
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void FM::execute(const buffer_s16_t& audio, const buffer_c8_t& buffer, bool& configured_in, uint32_t& new_beep_index, uint32_t& new_beep_timer, TXProgressMessage& new_txprogress_message, AudioLevelReportMessage& new_level_message, uint32_t& new_power_acc_count, uint32_t& new_divider ) {
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int32_t sample = 0;
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int8_t re, im;
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for (size_t counter = 0; counter < buffer.count; counter++) {
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sample = audio.p[counter>>6] >> 8; // sample = audio.p[counter / over] >> 8; (not enough efficient running code, over = 1536000/240000= 64 )
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sample *= audio_gain; // Apply GAIN Scale factor to the audio TX modulation.
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if (play_beep) {
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sample = apply_beep(sample, configured_in, new_beep_index, new_beep_timer, new_txprogress_message ); // Apply beep -if selected - atom ,sample by sample.
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} else {
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// Update vu-meter bar in the LCD screen.
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power_acc += (sample < 0) ? -sample : sample; // Power average for UI vu-meter
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if (new_power_acc_count) {
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new_power_acc_count--;
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} else { // power_acc_count = 0
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new_power_acc_count = new_divider;
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new_level_message.value = power_acc / (new_divider / 4); // Why ? . This division is to adj vu-meter sentitivity, to match saturation point to red-muter .
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shared_memory.application_queue.push(new_level_message);
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power_acc = 0;
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}
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// TODO: pending to optimize CPU running code.
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// So far , we can not handle all 3 issues at the same time (vu-meter , CTCSS, beep).
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sample = tone_gen.process(sample); // Add selected Key_Tone or CTCSS subtone , atom function() , sample by sample.
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}
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delta = sample * fm_delta; // Modulate FM
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phase += delta;
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sphase = phase >> 24;
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re = (sine_table_i8[(sphase + 64) & 255]);
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im = (sine_table_i8[sphase]);
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buffer.p[counter] = { re, im };
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}
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}
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AM::AM() {
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mode = Mode::AM;
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}
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void AM::execute(const buffer_s16_t& audio, const buffer_c8_t& buffer, bool& configured_in, uint32_t& new_beep_index, uint32_t& new_beep_timer, TXProgressMessage& new_txprogress_message, AudioLevelReportMessage& new_level_message, uint32_t& new_power_acc_count, uint32_t& new_divider ) {
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int32_t sample = 0;
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int8_t re = 0, im = 0;
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float q = 0.0;
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for (size_t counter = 0; counter < buffer.count; counter++) {
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if (counter % 128 == 0) {
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sample = audio.p[counter / over] >> 2;
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sample *= audio_gain; // Apply GAIN Scale factor to the audio TX modulation.
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}
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if (play_beep) {
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sample = apply_beep(sample, configured_in, new_beep_index, new_beep_timer, new_txprogress_message )<<5; // Apply beep -if selected - atom sample by sample.
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} else {
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// Update vu-meter bar in the LCD screen.
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power_acc += (sample < 0) ? -sample : sample; // Power average for UI vu-meter
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if (new_power_acc_count) {
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new_power_acc_count--;
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} else { // power_acc_count = 0
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new_power_acc_count = new_divider;
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new_level_message.value = power_acc / (new_divider *8); // Why ?orig / (new_divider / 4); // Why ?
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shared_memory.application_queue.push(new_level_message);
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power_acc = 0;
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}
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}
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q = sample / 32768.0f;
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q *= 256.0f; // Original 64.0f,now x4 (+12 dB's BB_modulation in AM & DSB)
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switch (mode) {
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case Mode::AM: re = q + 80; im = q + 80; break; // Original DC add +20_DC_level=carrier,now x4 (+12dB's AM carrier)
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case Mode::DSB: re = q; im = q; break;
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default: break;
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}
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buffer.p[counter] = { re, im };
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}
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}
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}
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}
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