82 lines
2.1 KiB
C++
82 lines
2.1 KiB
C++
/*
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* Copyright (C) 2014 Jared Boone, ShareBrained Technology, Inc.
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* Copyright (C) 2016 Furrtek
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*
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* This file is part of PortaPack.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef __AUDIO_OUTPUT_H__
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#define __AUDIO_OUTPUT_H__
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#include "dsp_types.hpp"
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#include "dsp_iir.hpp"
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#include "dsp_squelch.hpp"
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#include "stream_input.hpp"
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#include "block_decimator.hpp"
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#include "audio_stats_collector.hpp"
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#include <cstdint>
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#include <memory>
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class AudioOutput {
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public:
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void configure(const bool do_proc);
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void configure(
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const iir_biquad_config_t& hpf_config,
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const iir_biquad_config_t& deemph_config = iir_config_passthrough,
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const float squelch_threshold = 0.0f
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);
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void write(const buffer_s16_t& audio);
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void write(const buffer_f32_t& audio);
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void set_stream(std::unique_ptr<StreamInput> new_stream) {
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stream = std::move(new_stream);
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}
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bool is_squelched();
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private:
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static constexpr float k = 32768.0f;
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static constexpr float ki = 1.0f / k;
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BlockDecimator<float, 32> block_buffer { 1 };
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IIRBiquadFilter hpf { };
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IIRBiquadFilter deemph { };
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FMSquelch squelch { };
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std::unique_ptr<StreamInput> stream { };
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AudioStatsCollector audio_stats { };
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uint64_t audio_present_history = 0;
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bool audio_present = false;
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bool do_processing = true;
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void on_block(const buffer_f32_t& audio);
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void fill_audio_buffer(const buffer_f32_t& audio, const bool send_to_fifo);
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void feed_audio_stats(const buffer_f32_t& audio);
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};
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#endif/*__AUDIO_OUTPUT_H__*/
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