mirror of
https://github.com/eried/portapack-mayhem.git
synced 2024-12-24 23:09:26 -05:00
96 lines
2.6 KiB
C++
96 lines
2.6 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 __AUDIO_STATS_COLLECTOR_H__
|
|
#define __AUDIO_STATS_COLLECTOR_H__
|
|
|
|
#include "buffer.hpp"
|
|
#include "message.hpp"
|
|
#include "utility.hpp"
|
|
|
|
#include <cstdint>
|
|
#include <cstddef>
|
|
|
|
class AudioStatsCollector {
|
|
public:
|
|
template<typename Callback>
|
|
void feed(buffer_s16_t src, Callback callback) {
|
|
consume_audio_buffer(src);
|
|
|
|
if( update_stats(src.count, src.sampling_rate) ) {
|
|
callback(statistics);
|
|
}
|
|
}
|
|
|
|
template<typename Callback>
|
|
void mute(const size_t sample_count, const size_t sampling_rate, Callback callback) {
|
|
if( update_stats(sample_count, sampling_rate) ) {
|
|
callback(statistics);
|
|
}
|
|
}
|
|
|
|
private:
|
|
static constexpr float update_interval { 0.1f };
|
|
uint64_t squared_sum { 0 };
|
|
uint32_t max_squared { 0 };
|
|
size_t count { 0 };
|
|
|
|
AudioStatistics statistics;
|
|
|
|
void consume_audio_buffer(buffer_s16_t src) {
|
|
auto src_p = src.p;
|
|
const auto src_end = &src.p[src.count];
|
|
while(src_p < src_end) {
|
|
const auto sample = *(src_p++);
|
|
const uint64_t sample_squared = sample * sample;
|
|
squared_sum += sample_squared;
|
|
if( sample_squared > max_squared ) {
|
|
max_squared = sample_squared;
|
|
}
|
|
}
|
|
}
|
|
|
|
bool update_stats(const size_t sample_count, const size_t sampling_rate) {
|
|
count += sample_count;
|
|
|
|
const size_t samples_per_update = sampling_rate * update_interval;
|
|
|
|
if( count >= samples_per_update ) {
|
|
const float squared_sum_f = squared_sum;
|
|
const float max_squared_f = max_squared;
|
|
const float squared_avg_f = squared_sum_f / count;
|
|
statistics.rms_db = complex16_mag_squared_to_dbv_norm(squared_avg_f);
|
|
statistics.max_db = complex16_mag_squared_to_dbv_norm(max_squared_f);
|
|
statistics.count = count;
|
|
|
|
squared_sum = 0;
|
|
max_squared = 0;
|
|
count = 0;
|
|
|
|
return true;
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
};
|
|
|
|
#endif/*__AUDIO_STATS_COLLECTOR_H__*/
|