mayhem-firmware/firmware/baseband/audio_output.hpp
2024-02-10 16:56:50 +01:00

88 lines
2.5 KiB
C++

/*
* Copyright (C) 2014 Jared Boone, ShareBrained Technology, Inc.
* Copyright (C) 2016 Furrtek
* Copyright (C) 2024 Mark Thompson
*
* 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_OUTPUT_H__
#define __AUDIO_OUTPUT_H__
#include "dsp_types.hpp"
#include "dsp_iir.hpp"
#include "dsp_squelch.hpp"
#include "stream_input.hpp"
#include "block_decimator.hpp"
#include "audio_stats_collector.hpp"
#include <cstdint>
#include <memory>
class AudioOutput {
public:
void configure(const bool do_proc);
void configure(
const iir_biquad_config_t& hpf_config,
const iir_biquad_config_t& deemph_config = iir_config_passthrough,
const float squelch_threshold = 0.0f);
void write_unprocessed(const buffer_s16_t& audio);
void write(const buffer_s16_t& audio);
void write(const buffer_f32_t& audio);
void set_stream(std::unique_ptr<StreamInput> new_stream) {
stream = std::move(new_stream);
}
bool is_squelched();
private:
static constexpr float k = 32768.0f;
static constexpr float ki = 1.0f / k;
BlockDecimator<int16_t, 32> block_buffer_s16{1};
BlockDecimator<float, 32> block_buffer{1};
IIRBiquadFilter hpf{};
IIRBiquadFilter deemph{};
FMSquelch squelch{};
std::unique_ptr<StreamInput> stream{};
AudioStatsCollector audio_stats{};
uint64_t audio_present_history = 0;
bool audio_present = false;
bool do_processing = true;
void on_block(const buffer_f32_t& audio);
void fill_audio_buffer(const buffer_s16_t& audio, const bool send_to_fifo);
void fill_audio_buffer(const buffer_f32_t& audio, const bool send_to_fifo);
void feed_audio_stats(const buffer_s16_t& audio);
void feed_audio_stats(const buffer_f32_t& audio);
};
#endif /*__AUDIO_OUTPUT_H__*/