portapack-mayhem/firmware/baseband/channel_stats_collector.hpp

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/*
* 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 __CHANNEL_STATS_COLLECTOR_H__
#define __CHANNEL_STATS_COLLECTOR_H__
#include "dsp_types.hpp"
#include "message.hpp"
#include "utility.hpp"
#include <cstdint>
#include <cstddef>
class ChannelStatsCollector {
public:
template<typename Callback>
void feed(buffer_c16_t src, Callback callback) {
auto src_p = src.p;
while(src_p < &src.p[src.count]) {
const uint32_t sample = *__SIMD32(src_p)++;
const uint32_t mag_sq = __SMUAD(sample, sample);
if( mag_sq > max_squared ) {
max_squared = mag_sq;
}
}
count += src.count;
const size_t samples_per_update = src.sampling_rate * update_interval;
if( count >= samples_per_update ) {
const float max_squared_f = max_squared;
const float max_db_f = complex16_mag_squared_to_dbv_norm(max_squared_f);
const int32_t max_db = max_db_f;
const ChannelStatistics statistics {
.max_db = max_db,
.count = count,
};
callback(statistics);
max_squared = 0;
count = 0;
}
}
private:
static constexpr float update_interval { 0.1f };
uint32_t max_squared { 0 };
size_t count { 0 };
};
#endif/*__CHANNEL_STATS_COLLECTOR_H__*/