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https://github.com/eried/portapack-mayhem.git
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033c4e9a5b
* Updated style * Updated files * fixed new line * Updated spacing * File fix WIP * Updated to clang 13 * updated comment style * Removed old comment code
116 lines
3.5 KiB
C++
116 lines
3.5 KiB
C++
/*
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* Copyright (C) 2015 Jared Boone, ShareBrained Technology, Inc.
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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 "tv_collector.hpp"
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#include "dsp_fft.hpp"
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#include "utility.hpp"
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#include "event_m4.hpp"
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#include "portapack_shared_memory.hpp"
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#include "event_m4.hpp"
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#include <algorithm>
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void TvCollector::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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update();
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break;
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case Message::ID::SpectrumStreamingConfig:
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set_state(*reinterpret_cast<const SpectrumStreamingConfigMessage*>(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 TvCollector::set_state(const SpectrumStreamingConfigMessage& message) {
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if (message.mode == SpectrumStreamingConfigMessage::Mode::Running) {
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start();
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} else {
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stop();
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}
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}
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void TvCollector::start() {
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streaming = true;
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ChannelSpectrumConfigMessage message{&fifo};
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shared_memory.application_queue.push(message);
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}
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void TvCollector::stop() {
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streaming = false;
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fifo.reset_in();
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}
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void TvCollector::set_decimation_factor(
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const size_t decimation_factor) {
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channel_spectrum_decimator.set_factor(decimation_factor);
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}
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/* TODO: Refactor to register task with idle thread?
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* It's sad that the idle thread has to call all the way back here just to
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* perform the deferred task on the buffer of data we prepared.
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*/
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void TvCollector::feed(
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const buffer_c16_t& channel) {
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// Called from baseband processing thread.
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channel_spectrum_decimator.feed(channel, [this](const buffer_c16_t& data) { this->post_message(data); });
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}
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void TvCollector::post_message(const buffer_c16_t& data) {
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// Called from baseband processing thread.
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float re, im;
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float mag;
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if (streaming && !channel_spectrum_request_update) {
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for (size_t i = 0; i < 256; i++) {
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re = (float)(data.p[i].real());
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im = (float)(data.p[i].imag());
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mag = __builtin_sqrtf((re * re) + (im * im));
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channel_spectrum[i] = {mag, mag};
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}
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channel_spectrum_sampling_rate = data.sampling_rate;
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channel_spectrum_request_update = true;
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EventDispatcher::events_flag(EVT_MASK_SPECTRUM);
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}
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}
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void TvCollector::update() {
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// Called from idle thread (after EVT_MASK_SPECTRUM is flagged)
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if (streaming && channel_spectrum_request_update) {
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ChannelSpectrum spectrum;
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spectrum.sampling_rate = channel_spectrum_sampling_rate;
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for (size_t i = 0; i < spectrum.db.size(); i++) {
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const auto corrected_sample = channel_spectrum[i].real();
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const unsigned int v = corrected_sample + 127.0f;
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spectrum.db[i] = std::max(0U, std::min(255U, v));
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}
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fifo.in(spectrum);
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}
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channel_spectrum_request_update = false;
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}
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