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proc_capture.hpp
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/
proc_capture.hpp
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/*
* Copyright (C) 2016 Jared Boone, ShareBrained Technology, Inc.
* Copyright (C) 2018 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.
*/
#ifndef __PROC_CAPTURE_HPP__
#define __PROC_CAPTURE_HPP__
#include "baseband_processor.hpp"
#include "baseband_thread.hpp"
#include "rssi_thread.hpp"
#include "dsp_decimate.hpp"
#include "spectrum_collector.hpp"
#include "stream_input.hpp"
#include <array>
#include <memory>
class CaptureProcessor : public BasebandProcessor {
public:
CaptureProcessor();
void execute(const buffer_c8_t& buffer) override;
void on_message(const Message* const message) override;
private:
size_t baseband_fs = 3072000;
static constexpr auto spectrum_rate_hz = 50.0f;
std::array<complex16_t, 512> dst{};
const buffer_c16_t dst_buffer{
dst.data(),
dst.size()};
/* NB: There are two decimation passes: 0 and 1. In pass 0, one of
* the following will be selected based on the oversample rate.
* use decim_0_4 for an overall decimation factor of 8.
* use decim_0_8 for an overall decimation factor of 16. */
dsp::decimate::FIRC8xR16x24FS4Decim4 decim_0_4{};
dsp::decimate::FIRC8xR16x24FS4Decim8 decim_0_8{};
dsp::decimate::FIRC16xR16x16Decim2 decim_1{};
int32_t channel_filter_low_f = 0;
int32_t channel_filter_high_f = 0;
int32_t channel_filter_transition = 0;
std::unique_ptr<StreamInput> stream{};
SpectrumCollector channel_spectrum{};
size_t spectrum_interval_samples = 0;
size_t spectrum_samples = 0;
OversampleRate oversample_rate{OversampleRate::Rate8x};
/* NB: Threads should be the last members in the class definition. */
BasebandThread baseband_thread{
baseband_fs, this, baseband::Direction::Receive, /*auto_start*/ false};
RSSIThread rssi_thread{};
/* Called to update members when the sample rate or oversample rate is changed. */
void update_for_rate_change();
void capture_config(const CaptureConfigMessage& message);
/* Dispatch to the correct decim_0 based on oversample rate. */
buffer_c16_t decim_0_execute(const buffer_c8_t& src, const buffer_c16_t& dst);
};
#endif /*__PROC_CAPTURE_HPP__*/