portapack-mayhem/firmware/baseband/audio_stats_collector.hpp

/*
 * 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 "dsp_types.hpp"
#include "message.hpp"

#include <cstdint>
#include <cstddef>

class AudioStatsCollector {
   public:
    template <typename Callback>
    void feed(const buffer_s16_t& src, Callback callback) {
        if (feed(src)) {
            callback(statistics);
        }
    }

    template <typename Callback>
    void feed(const buffer_f32_t& src, Callback callback) {
        if (feed(src)) {
            callback(statistics);
        }
    }

    template <typename Callback>
    void mute(const size_t sample_count, const size_t sampling_rate, Callback callback) {
        if (mute(sample_count, sampling_rate)) {
            callback(statistics);
        }
    }

   private:
    static constexpr float update_interval{0.1f};
    float squared_sum{0};
    float max_squared{0};
    size_t count{0};

    AudioStatistics statistics{};

    void consume_audio_buffer(const buffer_s16_t& src);
    void consume_audio_buffer(const buffer_f32_t& src);

    bool update_stats(const size_t sample_count, const size_t sampling_rate);

    bool feed(const buffer_s16_t& src);
    bool feed(const buffer_f32_t& src);
    bool mute(const size_t sample_count, const size_t sampling_rate);
};

#endif /*__AUDIO_STATS_COLLECTOR_H__*/