mirror of https://github.com/ShaYmez/xlxd.git
56 lines
1.8 KiB
C
56 lines
1.8 KiB
C
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//
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// cagc.h
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// ambed
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//
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// Created by Jean-Luc Deltombe (LX3JL) on 26/04/2017.
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// Copyright © 2015 Jean-Luc Deltombe (LX3JL). All rights reserved.
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//
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// ----------------------------------------------------------------------------
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// This file is part of ambed.
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//
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// xlxd 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 3 of the License, or
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// (at your option) any later version.
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//
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// xlxd 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 Foobar. If not, see <http://www.gnu.org/licenses/>.
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// ----------------------------------------------------------------------------
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// Geoffrey Merck F4FXL / KC3FRA AGC code borrowed from Liquid DSP
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// Only took the parts we need qnd recoeded it to be close the XLX coding style
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// https://github.com/jgaeddert/liquid-dsp/blob/master/src/agc/src/agc.c
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#ifndef cagc_h
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#define cagc_h
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#include "main.h"
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class CAGC
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{
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public:
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//Constructor
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CAGC(float initialLeveldB);
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//methods
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void Apply(uint8 * voice, int size);
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float GetGain(){ return m_scale; }//gets current gain (linear)
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private:
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// gain variables
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float m_g; // current gain value
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float m_scale; // output scale value
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// gain control loop filter parameters
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float m_bandwidth; // bandwidth-time constant
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float m_alpha; // feed-back gain
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// signal level estimate
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float m_y2_prime; // filtered output signal energy estimate
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};
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#endif /* cgc_h */
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