mirror of
https://github.com/portapack-mayhem/mayhem-firmware.git
synced 2024-12-15 12:38:11 +00:00
93 lines
3.0 KiB
C++
93 lines
3.0 KiB
C++
/*
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* Copyright (C) 2016 Jared Boone, ShareBrained Technology, Inc.
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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_capture.hpp"
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#include "dsp_fir_taps.hpp"
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#include "utility.hpp"
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CaptureProcessor::CaptureProcessor() {
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const auto& decim_0_filter = taps_200k_decim_0;
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constexpr size_t decim_0_input_fs = baseband_fs;
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constexpr size_t decim_0_output_fs = decim_0_input_fs / decim_0.decimation_factor;
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const auto& decim_1_filter = taps_200k_decim_1;
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constexpr size_t decim_1_input_fs = decim_0_output_fs;
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constexpr size_t decim_1_output_fs = decim_1_input_fs / decim_1.decimation_factor;
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decim_0.configure(decim_0_filter.taps, 33554432);
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decim_1.configure(decim_1_filter.taps, 131072);
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channel_filter_pass_f = decim_1_filter.pass_frequency_normalized * decim_1_input_fs;
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channel_filter_stop_f = decim_1_filter.stop_frequency_normalized * decim_1_input_fs;
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spectrum_interval_samples = decim_1_output_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 CaptureProcessor::execute(const buffer_c8_t& buffer) {
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/* 2.4576MHz, 2048 samples */
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const auto decim_0_out = decim_0.execute(buffer, dst_buffer);
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const auto decim_1_out = decim_1.execute(decim_0_out, dst_buffer);
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const auto& decimator_out = decim_1_out;
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const auto& channel = decimator_out;
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if( stream ) {
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const size_t bytes_to_write = sizeof(*decimator_out.p) * decimator_out.count;
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const auto result = stream->write(decimator_out.p, bytes_to_write);
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}
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feed_channel_stats(channel);
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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 CaptureProcessor::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::CaptureConfig:
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capture_config(*reinterpret_cast<const CaptureConfigMessage*>(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 CaptureProcessor::capture_config(const CaptureConfigMessage& message) {
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if( message.config ) {
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stream = std::make_unique<StreamInput>(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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