136 lines
3.5 KiB
C++
136 lines
3.5 KiB
C++
// ------------------------------------------------------------------------
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//
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// Copyright (C) 2010-2011 Fons Adriaensen <fons@linuxaudio.org>
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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 of the License, or
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// (at your option) 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; if not, write to the Free Software
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// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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//
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// ------------------------------------------------------------------------
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#ifndef _EBU_R128_PROC_H
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#define _EBU_R128_PROC_H
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#define MAXCH 5
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namespace FonsEBU {
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class Ebu_r128_proc
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{
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public:
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Ebu_r128_proc ();
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~Ebu_r128_proc ();
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void init (int nchan, float fsamp);
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void reset ();
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void process (int nfram, const float* const* input);
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void integr_reset ();
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void integr_pause () { _integr = false; }
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void integr_start () { _integr = true; }
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float loudness_M () const { return _loudness_M; }
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float maxloudn_M () const { return _maxloudn_M; }
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float loudness_S () const { return _loudness_S; }
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float maxloudn_S () const { return _maxloudn_S; }
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float integrated () const { return _integrated; }
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float integ_thr () const { return _integ_thr; }
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float range_min () const { return _range_min; }
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float range_max () const { return _range_max; }
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float range_thr () const { return _range_thr; }
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const int* histogram_M () const { return _hist_M._histc; }
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const int* histogram_S () const { return _hist_S._histc; }
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int hist_M_count () const { return _hist_M._count; }
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int hist_S_count () const { return _hist_S._count; }
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private:
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class Ebu_r128_fst
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{
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private:
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friend class Ebu_r128_proc;
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void reset ()
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{
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_z1 = _z2 = _z3 = _z4 = 0;
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}
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float _z1, _z2, _z3, _z4;
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};
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class Ebu_r128_hist
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{
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private:
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Ebu_r128_hist ();
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~Ebu_r128_hist ();
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friend class Ebu_r128_proc;
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void reset ();
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void initstat ();
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void addpoint (float v);
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float integrate (int ind);
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void calc_integ (float* vi, float* th);
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void calc_range (float* v0, float* v1, float* th);
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int* _histc;
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int _count;
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int _error;
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static float _bin_power[100];
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};
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float addfrags (int nfrag);
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void detect_init (float fsamp);
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void detect_reset ();
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float detect_process (int nfram);
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bool _integr; // Integration on/off.
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int _nchan; // Number of channels, 2 or 5.
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float _fsamp; // Sample rate.
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int _fragm; // Fragmenst size, 1/20 second.
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int _frcnt; // Number of samples remaining in current fragment.
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float _frpwr; // Power accumulated for current fragment.
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float _power[64]; // Array of fragment powers.
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int _wrind; // Write index into _frpwr
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int _div1; // M period counter, 200 ms;
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int _div2; // S period counter, 1s;
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float _loudness_M;
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float _maxloudn_M;
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float _loudness_S;
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float _maxloudn_S;
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float _integrated;
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float _integ_thr;
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float _range_min;
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float _range_max;
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float _range_thr;
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// Filter coefficients and states.
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float _a0, _a1, _a2;
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float _b1, _b2;
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float _c3, _c4;
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float const* _ipp[MAXCH];
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Ebu_r128_fst _fst[MAXCH];
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Ebu_r128_hist _hist_M;
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Ebu_r128_hist _hist_S;
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// Default channel gains.
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static float _chan_gain[5];
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};
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};
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#endif
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