mirror of
https://github.com/eried/portapack-mayhem.git
synced 2024-10-01 01:26:06 -04:00
128 lines
4.3 KiB
C++
128 lines
4.3 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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GPSReplayProcessor::GPSReplayProcessor() {
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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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baseband_thread.start();
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}
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void GPSReplayProcessor::execute(const buffer_c8_t& buffer) {
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/* 2.6MHz, 2048 samples */
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if (!configured || !stream) return;
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// File data is in C8 format, which is what we need
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// File samplerate is 2.6MHz, which is what we need
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// To fill up the 2048-sample C8 buffer @ 2 bytes per sample = 4096 bytes
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const size_t bytes_to_read = sizeof(*buffer.p) * 1 * (buffer.count);
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size_t bytes_read_this_iteration = stream->read(iq_buffer.p, bytes_to_read);
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size_t samples_read_this_iteration = bytes_read_this_iteration / sizeof(*buffer.p);
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bytes_read += bytes_read_this_iteration;
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// NB: Couldn't we have just read the data into buffer.p to start with, or some DMA/cache coherency concern?
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//
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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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memcpy(buffer.p, iq_buffer.p, bytes_read_this_iteration); // memcpy should be more efficient than 1 byte at a time
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spectrum_samples += samples_read_this_iteration;
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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; // 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 GPSReplayProcessor::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 GPSReplayProcessor::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 GPSReplayProcessor::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<GPSReplayProcessor>()};
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event_dispatcher.run();
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return 0;
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}
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