portapack-mayhem/firmware/baseband/proc_replay.cpp

102 lines
2.9 KiB
C++

/*
* Copyright (C) 2016 Jared Boone, ShareBrained Technology, Inc.
* Copyright (C) 2016 Furrtek
*
* This file is part of PortaPack.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street,
* Boston, MA 02110-1301, USA.
*/
#include "proc_replay.hpp"
#include "event_m4.hpp"
#include "utility.hpp"
ReplayProcessor::ReplayProcessor() {
// TODO: Interpolation filter needed !
/*spectrum_interval_samples = baseband_fs / spectrum_rate_hz;
spectrum_samples = 0;
channel_spectrum.set_decimation_factor(1);*/
}
void ReplayProcessor::execute(const buffer_c8_t& buffer) {
/* 4MHz, 2048 samples */
size_t pos = 0;
// File data is in C16 format, we need C8
// File samplerate is 500kHz, we're at 4MHz
// iq_buffer can only be 512 samples (RAM limitation)
// For a full 2048-sample C8 buffer, we need:
// 2048 samples * 2 bytes per sample = 4096 bytes
// Since we're oversampling by 4M/500k = 8, we only need 2048/8 = 256 samples from the file
// So 256 * 4 bytes per sample (C16) = 1024 bytes from the file
if( stream ) {
const size_t bytes_to_read = sizeof(*buffer.p) * 2 * (buffer.count / 8); // *2 (C16), /8 (oversampling)
const auto result = stream->read(iq_buffer.p, bytes_to_read);
}
//feed_channel_stats(channel);
// Zero-stuff
for (size_t i = 0; i < buffer.count; i++) {
if (i & 3)
buffer.p[i] = { 0, 0 };
else
buffer.p[i] = { iq_buffer.p[i >> 3].real() >> 8, iq_buffer.p[i >> 3].imag() >> 8 };
}
/*spectrum_samples += channel.count;
if( spectrum_samples >= spectrum_interval_samples ) {
spectrum_samples -= spectrum_interval_samples;
channel_spectrum.feed(channel, channel_filter_pass_f, channel_filter_stop_f);
}*/
}
void ReplayProcessor::on_message(const Message* const message) {
switch(message->id) {
/*case Message::ID::UpdateSpectrum:
case Message::ID::SpectrumStreamingConfig:
channel_spectrum.on_message(message);
break;*/
case Message::ID::ReplayConfig:
replay_config(*reinterpret_cast<const ReplayConfigMessage*>(message));
break;
default:
break;
}
}
void ReplayProcessor::replay_config(const ReplayConfigMessage& message) {
if( message.config ) {
stream = std::make_unique<StreamOutput>(message.config);
} else {
stream.reset();
}
}
int main() {
EventDispatcher event_dispatcher { std::make_unique<ReplayProcessor>() };
event_dispatcher.run();
return 0;
}