mirror of
https://github.com/eried/portapack-mayhem.git
synced 2024-09-20 16:15:51 +00:00
129 lines
4.0 KiB
C++
129 lines
4.0 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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* Copyright (C) 2020 Shao
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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_gps_sim.hpp"
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#include "sine_table_int8.hpp"
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#include "portapack_shared_memory.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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channel_filter_low_f = taps_200k_decim_1.low_frequency_normalized * 1000000;
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channel_filter_high_f = taps_200k_decim_1.high_frequency_normalized * 1000000;
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channel_filter_transition = taps_200k_decim_1.transition_normalized * 1000000;
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spectrum_samples = 0;
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channel_spectrum.set_decimation_factor(1);
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configured = false;
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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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if (!configured) return;
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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 C16 samples (RAM limitation)
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// To fill up the 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 and duplicate them 8 times each
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// So 256 * 4 bytes per sample (C16) = 1024 bytes from the file
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if( stream ) { //sizeof(*buffer.p) = sizeof(C8) = 2*int8 = 2 bytes //buffer.count = 2048
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const size_t bytes_to_read = sizeof(*buffer.p) * 1 * (buffer.count ); // *2 (C16), /8 (oversampling) should be == 1024
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bytes_read += stream->read(iq_buffer.p, bytes_to_read);
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}
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// Fill and "stretch"
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for (size_t i = 0; i < buffer.count; i++) {
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auto re_out = iq_buffer.p[i].real() ;
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auto im_out = iq_buffer.p[i].imag() ;
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buffer.p[i] = { (int8_t)re_out, (int8_t)im_out };
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}
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spectrum_samples += buffer.count;
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if( spectrum_samples >= spectrum_interval_samples ) {
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spectrum_samples -= spectrum_interval_samples;
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txprogress_message.progress = bytes_read / 1024; // 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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}
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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::SamplerateConfig:
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samplerate_config(*reinterpret_cast<const SamplerateConfigMessage*>(message));
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break;
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case Message::ID::ReplayConfig:
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configured = false;
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bytes_read = 0;
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replay_config(*reinterpret_cast<const ReplayConfigMessage*>(message));
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break;
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// App has prefilled the buffers, we're ready to go now
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case Message::ID::FIFOData:
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configured = true;
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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::samplerate_config(const SamplerateConfigMessage& message) {
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baseband_fs = message.sample_rate;
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baseband_thread.set_sampling_rate(baseband_fs);
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spectrum_interval_samples = baseband_fs / spectrum_rate_hz;
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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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// Tell application that the buffers and FIFO pointers are ready, prefill
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shared_memory.application_queue.push(sig_message);
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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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