mirror of
https://github.com/portapack-mayhem/mayhem-firmware.git
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102 lines
2.9 KiB
C++
102 lines
2.9 KiB
C++
/*
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* Copyright (C) 2016 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_replay.hpp"
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#include "event_m4.hpp"
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#include "utility.hpp"
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ReplayProcessor::ReplayProcessor() {
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// TODO: Interpolation filter needed !
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/*spectrum_interval_samples = baseband_fs / spectrum_rate_hz;
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spectrum_samples = 0;
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channel_spectrum.set_decimation_factor(1);*/
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}
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void ReplayProcessor::execute(const buffer_c8_t& buffer) {
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/* 4MHz, 2048 samples */
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size_t pos = 0;
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// File data is in C16 format, we need C8
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// File samplerate is 500kHz, we're at 4MHz
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// iq_buffer can only be 512 samples (RAM limitation)
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// For a full 2048-sample C8 buffer, we need:
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// 2048 samples * 2 bytes per sample = 4096 bytes
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// Since we're oversampling by 4M/500k = 8, we only need 2048/8 = 256 samples from the file
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// So 256 * 4 bytes per sample (C16) = 1024 bytes from the file
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if( stream ) {
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const size_t bytes_to_read = sizeof(*buffer.p) * 2 * (buffer.count / 8); // *2 (C16), /8 (oversampling)
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const auto result = stream->read(iq_buffer.p, bytes_to_read);
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}
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//feed_channel_stats(channel);
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// Zero-stuff
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for (size_t i = 0; i < buffer.count; i++) {
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if (i & 3)
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buffer.p[i] = { 0, 0 };
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else
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buffer.p[i] = { iq_buffer.p[i >> 3].real() >> 8, iq_buffer.p[i >> 3].imag() >> 8 };
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}
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/*spectrum_samples += channel.count;
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if( spectrum_samples >= spectrum_interval_samples ) {
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spectrum_samples -= spectrum_interval_samples;
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channel_spectrum.feed(channel, channel_filter_pass_f, channel_filter_stop_f);
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}*/
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}
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void ReplayProcessor::on_message(const Message* const message) {
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switch(message->id) {
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/*case Message::ID::UpdateSpectrum:
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case Message::ID::SpectrumStreamingConfig:
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channel_spectrum.on_message(message);
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break;*/
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case Message::ID::ReplayConfig:
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replay_config(*reinterpret_cast<const ReplayConfigMessage*>(message));
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break;
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default:
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break;
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}
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}
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void ReplayProcessor::replay_config(const ReplayConfigMessage& message) {
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if( message.config ) {
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stream = std::make_unique<StreamOutput>(message.config);
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} else {
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stream.reset();
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}
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}
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int main() {
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EventDispatcher event_dispatcher { std::make_unique<ReplayProcessor>() };
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event_dispatcher.run();
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return 0;
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}
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