mirror of
https://github.com/portapack-mayhem/mayhem-firmware.git
synced 2024-12-15 20:50:28 +00:00
76 lines
2.0 KiB
C++
76 lines
2.0 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 __CHANNEL_STATS_COLLECTOR_H__
|
|
#define __CHANNEL_STATS_COLLECTOR_H__
|
|
|
|
#include "dsp_types.hpp"
|
|
#include "message.hpp"
|
|
#include "utility.hpp"
|
|
|
|
#include <cstdint>
|
|
#include <cstddef>
|
|
|
|
#include <hal.h>
|
|
|
|
class ChannelStatsCollector {
|
|
public:
|
|
template<typename Callback>
|
|
void feed(const buffer_c16_t& src, Callback callback) {
|
|
max_squared = compute_max_squared(src, max_squared);
|
|
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 int32_t max_db = mag2_to_dbv_norm(max_squared_f * (1.0f / (32768.0f * 32768.0f)));
|
|
callback({ max_db, count });
|
|
|
|
max_squared = 0;
|
|
count = 0;
|
|
}
|
|
}
|
|
|
|
private:
|
|
static constexpr float update_interval { 0.1f };
|
|
uint32_t max_squared { 0 };
|
|
size_t count { 0 };
|
|
|
|
static uint32_t compute_max_squared(
|
|
const buffer_c16_t& src,
|
|
uint32_t max_squared
|
|
) {
|
|
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;
|
|
}
|
|
}
|
|
|
|
return max_squared;
|
|
}
|
|
};
|
|
|
|
#endif/*__CHANNEL_STATS_COLLECTOR_H__*/
|