portapack-mayhem/firmware/baseband/baseband_processor.hpp
Jared Boone 291de8f869 Change channel_spectrum type to std::complex<float>.
Move FFT bit-reversal to complex<int16_t> -> complex<float> copy.
Change window so that adjacent bins have constant(-ish) gain.
Change window to float.
Change time domain samples to accumulate at even intervals over the FFT interval.
2015-10-14 11:10:24 -07:00

77 lines
2.2 KiB
C++

/*
* Copyright (C) 2014 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.
*/
#ifndef __BASEBAND_PROCESSOR_H__
#define __BASEBAND_PROCESSOR_H__
#include "dsp_types.hpp"
#include "complex.hpp"
#include "block_decimator.hpp"
#include "channel_stats_collector.hpp"
#include "audio_stats_collector.hpp"
#include <array>
#include <cstdint>
#include <complex>
class BasebandProcessor {
public:
virtual ~BasebandProcessor() = default;
virtual void execute(buffer_c8_t buffer) = 0;
void update_spectrum();
protected:
void feed_channel_stats(const buffer_c16_t channel);
void feed_channel_spectrum(
const buffer_c16_t channel,
const uint32_t filter_pass_frequency,
const uint32_t filter_stop_frequency
);
void fill_audio_buffer(const buffer_s16_t audio);
volatile bool channel_spectrum_request_update { false };
std::array<std::complex<float>, 256> channel_spectrum;
uint32_t channel_spectrum_sampling_rate { 0 };
uint32_t channel_filter_pass_frequency { 0 };
uint32_t channel_filter_stop_frequency { 0 };
private:
BlockDecimator<256> channel_spectrum_decimator { 4 };
ChannelStatsCollector channel_stats;
ChannelStatisticsMessage channel_stats_message;
AudioStatsCollector audio_stats;
AudioStatisticsMessage audio_stats_message;
void post_channel_stats_message(const ChannelStatistics statistics);
void post_channel_spectrum_message(const buffer_c16_t data);
void feed_audio_stats(const buffer_s16_t audio);
void post_audio_stats_message(const AudioStatistics statistics);
};
#endif/*__BASEBAND_PROCESSOR_H__*/