portapack-mayhem/firmware/baseband/proc_capture.cpp
Jared Boone d5e21ce972 Use CaptureConfig to share state between cores.
Remove awful FIFO_HACK.
TODO: Lots of repeated code...
TODO: Capture thread is signalled too frequently.
2016-04-23 15:07:44 -07:00

93 lines
3.0 KiB
C++

/*
* Copyright (C) 2016 Jared Boone, ShareBrained Technology, Inc.
*
* 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_capture.hpp"
#include "dsp_fir_taps.hpp"
#include "utility.hpp"
CaptureProcessor::CaptureProcessor() {
const auto& decim_0_filter = taps_200k_decim_0;
constexpr size_t decim_0_input_fs = baseband_fs;
constexpr size_t decim_0_output_fs = decim_0_input_fs / decim_0.decimation_factor;
const auto& decim_1_filter = taps_200k_decim_1;
constexpr size_t decim_1_input_fs = decim_0_output_fs;
constexpr size_t decim_1_output_fs = decim_1_input_fs / decim_1.decimation_factor;
decim_0.configure(decim_0_filter.taps, 33554432);
decim_1.configure(decim_1_filter.taps, 131072);
channel_filter_pass_f = decim_1_filter.pass_frequency_normalized * decim_1_input_fs;
channel_filter_stop_f = decim_1_filter.stop_frequency_normalized * decim_1_input_fs;
spectrum_interval_samples = decim_1_output_fs / spectrum_rate_hz;
spectrum_samples = 0;
channel_spectrum.set_decimation_factor(1);
}
void CaptureProcessor::execute(const buffer_c8_t& buffer) {
/* 2.4576MHz, 2048 samples */
const auto decim_0_out = decim_0.execute(buffer, dst_buffer);
const auto decim_1_out = decim_1.execute(decim_0_out, dst_buffer);
const auto& decimator_out = decim_1_out;
const auto& channel = decimator_out;
if( stream ) {
const size_t bytes_to_write = sizeof(*decimator_out.p) * decimator_out.count;
const auto result = stream->write(decimator_out.p, bytes_to_write);
}
feed_channel_stats(channel);
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 CaptureProcessor::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::CaptureConfig:
capture_config(*reinterpret_cast<const CaptureConfigMessage*>(message));
break;
default:
break;
}
}
void CaptureProcessor::capture_config(const CaptureConfigMessage& message) {
if( message.config ) {
stream = std::make_unique<StreamInput>(15, *message.config);
} else {
stream.reset();
}
}