621 lines
10 KiB
C++
621 lines
10 KiB
C++
/*
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* Copyright (C) 2006 Chris Cannam
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* Copyright (C) 2006-2012 Fons Adriaensen <fons@linuxaudio.org>
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* COPYRIGHT (C) 2012-2019 Robin Gareus <robin@gareus.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 along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <math.h>
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#include "TruePeak.h"
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namespace TruePeakMeter {
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static double sinc (double x)
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{
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x = fabs (x);
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if (x < 1e-6) return 1.0;
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x *= M_PI;
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return sin (x) / x;
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}
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static double wind (double x)
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{
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x = fabs (x);
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if (x >= 1.0) return 0.0f;
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x *= M_PI;
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return 0.384 + 0.500 * cos (x) + 0.116 * cos (2 * x);
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}
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Resampler_table *Resampler_table::_list = 0;
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Resampler_mutex Resampler_table::_mutex;
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Resampler_table::Resampler_table (double fr, unsigned int hl, unsigned int np)
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: _next (0)
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, _refc (0)
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, _fr (fr)
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, _hl (hl)
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, _np (np)
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{
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unsigned int i, j;
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double t;
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float *p;
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_ctab = new float [hl * (np + 1)];
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p = _ctab;
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for (j = 0; j <= np; j++)
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{
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t = (double) j / (double) np;
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for (i = 0; i < hl; i++)
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{
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p [hl - i - 1] = (float)(fr * sinc (t * fr) * wind (t / hl));
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t += 1;
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}
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p += hl;
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}
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}
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Resampler_table::~Resampler_table (void)
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{
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delete[] _ctab;
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}
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Resampler_table *
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Resampler_table::create (double fr, unsigned int hl, unsigned int np)
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{
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Resampler_table *P;
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_mutex.lock ();
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P = _list;
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while (P)
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{
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if ((fr >= P->_fr * 0.999) && (fr <= P->_fr * 1.001) && (hl == P->_hl) && (np == P->_np))
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{
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P->_refc++;
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_mutex.unlock ();
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return P;
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}
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P = P->_next;
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}
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P = new Resampler_table (fr, hl, np);
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P->_refc = 1;
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P->_next = _list;
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_list = P;
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_mutex.unlock ();
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return P;
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}
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void
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Resampler_table::destroy (Resampler_table *T)
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{
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Resampler_table *P, *Q;
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_mutex.lock ();
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if (T)
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{
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T->_refc--;
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if (T->_refc == 0)
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{
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P = _list;
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Q = 0;
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while (P)
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{
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if (P == T)
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{
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if (Q) Q->_next = T->_next;
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else _list = T->_next;
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break;
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}
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Q = P;
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P = P->_next;
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}
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delete T;
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}
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}
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_mutex.unlock ();
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}
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static unsigned int
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gcd (unsigned int a, unsigned int b)
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{
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if (a == 0) return b;
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if (b == 0) return a;
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while (1)
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{
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if (a > b)
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{
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a = a % b;
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if (a == 0) return b;
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if (a == 1) return 1;
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}
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else
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{
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b = b % a;
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if (b == 0) return a;
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if (b == 1) return 1;
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}
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}
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return 1;
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}
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Resampler::Resampler (void)
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: _table (0)
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, _nchan (0)
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, _buff (0)
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{
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reset ();
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}
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Resampler::~Resampler (void)
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{
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clear ();
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}
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int
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Resampler::setup (unsigned int fs_inp,
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unsigned int fs_out,
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unsigned int nchan,
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unsigned int hlen)
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{
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if ((hlen < 8) || (hlen > 96)) return 1;
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return setup (fs_inp, fs_out, nchan, hlen, 1.0 - 2.6 / hlen);
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}
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int
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Resampler::setup (unsigned int fs_inp,
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unsigned int fs_out,
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unsigned int nchan,
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unsigned int hlen,
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double frel)
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{
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unsigned int g, h, k, n, s;
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double r;
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float *B = 0;
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Resampler_table *T = 0;
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k = s = 0;
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if (fs_inp && fs_out && nchan)
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{
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r = (double) fs_out / (double) fs_inp;
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g = gcd (fs_out, fs_inp);
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n = fs_out / g;
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s = fs_inp / g;
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if ((16 * r >= 1) && (n <= 1000))
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{
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h = hlen;
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k = 250;
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if (r < 1)
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{
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frel *= r;
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h = (unsigned int)(ceil (h / r));
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k = (unsigned int)(ceil (k / r));
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}
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T = Resampler_table::create (frel, h, n);
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B = new float [nchan * (2 * h - 1 + k)];
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}
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}
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clear ();
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if (T)
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{
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_table = T;
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_buff = B;
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_nchan = nchan;
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_inmax = k;
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_pstep = s;
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return reset ();
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}
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else return 1;
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}
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void
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Resampler::clear (void)
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{
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Resampler_table::destroy (_table);
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delete[] _buff;
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_buff = 0;
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_table = 0;
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_nchan = 0;
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_inmax = 0;
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_pstep = 0;
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reset ();
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}
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double
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Resampler::inpdist (void) const
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{
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if (!_table) return 0;
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return (int)(_table->_hl + 1 - _nread) - (double)_phase / _table->_np;
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}
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int
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Resampler::inpsize (void) const
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{
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if (!_table) return 0;
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return 2 * _table->_hl;
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}
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int
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Resampler::reset (void)
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{
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if (!_table) return 1;
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inp_count = 0;
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out_count = 0;
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inp_data = 0;
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out_data = 0;
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_index = 0;
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_nread = 0;
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_nzero = 0;
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_phase = 0;
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if (_table)
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{
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_nread = 2 * _table->_hl;
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return 0;
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}
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return 1;
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}
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int
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Resampler::process (void)
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{
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unsigned int hl, ph, np, dp, in, nr, nz, i, n, c;
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float *p1, *p2;
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if (!_table) return 1;
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hl = _table->_hl;
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np = _table->_np;
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dp = _pstep;
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in = _index;
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nr = _nread;
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ph = _phase;
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nz = _nzero;
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n = (2 * hl - nr) * _nchan;
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p1 = _buff + in * _nchan;
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p2 = p1 + n;
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while (out_count)
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{
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if (nr)
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{
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if (inp_count == 0) break;
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if (inp_data)
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{
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for (c = 0; c < _nchan; c++) p2 [c] = inp_data [c];
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inp_data += _nchan;
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nz = 0;
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}
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else
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{
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for (c = 0; c < _nchan; c++) p2 [c] = 0;
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if (nz < 2 * hl) nz++;
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}
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nr--;
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p2 += _nchan;
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inp_count--;
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}
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else
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{
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if (out_data)
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{
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if (nz < 2 * hl)
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{
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float *c1 = _table->_ctab + hl * ph;
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float *c2 = _table->_ctab + hl * (np - ph);
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for (c = 0; c < _nchan; c++)
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{
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float *q1 = p1 + c;
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float *q2 = p2 + c;
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float s = 1e-20f;
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for (i = 0; i < hl; i++)
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{
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q2 -= _nchan;
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s += *q1 * c1 [i] + *q2 * c2 [i];
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q1 += _nchan;
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}
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*out_data++ = s - 1e-20f;
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}
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}
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else
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{
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for (c = 0; c < _nchan; c++) *out_data++ = 0;
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}
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}
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out_count--;
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ph += dp;
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if (ph >= np)
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{
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nr = ph / np;
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ph -= nr * np;
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in += nr;
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p1 += nr * _nchan;;
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if (in >= _inmax)
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{
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n = (2 * hl - nr) * _nchan;
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memcpy (_buff, p1, n * sizeof (float));
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in = 0;
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p1 = _buff;
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p2 = p1 + n;
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}
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}
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}
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}
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_index = in;
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_nread = nr;
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_phase = ph;
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_nzero = nz;
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return 0;
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}
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TruePeakdsp::TruePeakdsp (void)
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: _m (0)
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, _p (0)
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, _res (true)
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, _res_peak (true)
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, _buf (NULL)
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{
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}
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TruePeakdsp::~TruePeakdsp (void)
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{
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free(_buf);
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}
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void
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TruePeakdsp::process (float const *d, int n)
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{
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_src.inp_count = n;
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_src.inp_data = d;
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_src.out_count = n * 4;
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_src.out_data = _buf;
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_src.process ();
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float x = 0;
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float v;
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float *b = _buf;
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while (n--) {
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v = fabsf(*b++);
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if (v > x) x = v;
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v = fabsf(*b++);
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if (v > x) x = v;
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v = fabsf(*b++);
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if (v > x) x = v;
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v = fabsf(*b++);
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if (v > x) x = v;
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}
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if (_res) {
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_m = x;
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_res = false;
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} else if (x > _m) {
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_m = x;
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}
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if (_res_peak) {
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_p = x;
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_res_peak = false;
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} else if (x > _p) {
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_p = x;
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}
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}
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float
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TruePeakdsp::read (void)
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{
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_res = true;
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return _m;
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}
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void
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TruePeakdsp::read (float &m, float &p)
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{
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_res = true;
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_res_peak = true;
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m = _m;
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p = _p;
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}
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void
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TruePeakdsp::reset ()
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{
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_res = true;
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_m = 0;
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_p = 0;
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}
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bool
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TruePeakdsp::init (float fsamp)
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{
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_src.setup(fsamp, fsamp * 4.0, 1, 24, 1.0);
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_buf = (float*) malloc(32768 * sizeof(float));
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if (!_buf) {
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return false;
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}
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/* q/d initialize */
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float zero[8192];
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for (int i = 0; i < 8192; ++i) {
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zero[i]= 0.0;
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}
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_src.inp_count = 8192;
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_src.inp_data = zero;
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_src.out_count = 32768;
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_src.out_data = _buf;
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_src.process ();
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return true;
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}
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}
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///////////////////////////////////////////////////////////////////////////////
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using std::string;
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using std::vector;
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using std::cerr;
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using std::endl;
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using namespace TruePeakMeter;
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VampTruePeak::VampTruePeak(float inputSampleRate)
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: Plugin(inputSampleRate)
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, m_blockSize(0)
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, m_rate (inputSampleRate)
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{
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}
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VampTruePeak::~VampTruePeak()
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{
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}
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string
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VampTruePeak::getIdentifier() const
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{
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return "dBTP";
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}
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string
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VampTruePeak::getName() const
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{
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return "dBTP Meter";
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}
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string
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VampTruePeak::getDescription() const
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{
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return "True Peak Meter (4x Oversampling)";
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}
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string
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VampTruePeak::getMaker() const
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{
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return "Robin Gareus, Fons Adrianesen";
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}
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int
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VampTruePeak::getPluginVersion() const
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{
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return 2;
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}
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string
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VampTruePeak::getCopyright() const
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{
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return "GPL version 3 or later";
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}
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bool
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VampTruePeak::initialise(size_t channels, size_t stepSize, size_t blockSize)
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{
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if (channels < getMinChannelCount() ||
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channels > getMaxChannelCount()) {
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return false;
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}
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if (blockSize == 0 || blockSize > 8192) {
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return false;
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}
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if (!_meter.init (m_inputSampleRate)) {
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return false;
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}
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m_blockSize = blockSize;
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return true;
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}
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void
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VampTruePeak::reset()
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{
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_meter.reset ();
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}
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VampTruePeak::OutputList
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VampTruePeak::getOutputDescriptors() const
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{
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OutputList list;
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OutputDescriptor zc;
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zc.identifier = "level";
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zc.name = "TruePeak";
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zc.description = "TruePeak (4x Oversampling)";
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zc.unit = "dbTP";
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zc.hasFixedBinCount = true;
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zc.binCount = 0;
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zc.hasKnownExtents = false;
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zc.isQuantized = false;
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zc.sampleType = OutputDescriptor::OneSamplePerStep;
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list.push_back(zc);
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zc.identifier = "peaks";
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zc.name = "TruePeakPeaks";
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zc.description = "Location of Peaks above -1dBTP";
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zc.unit = "sec";
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zc.hasFixedBinCount = true;
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zc.binCount = 0;
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zc.hasKnownExtents = false;
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zc.isQuantized = false;
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zc.sampleType = OutputDescriptor::OneSamplePerStep;
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list.push_back(zc);
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return list;
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}
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VampTruePeak::FeatureSet
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VampTruePeak::process(const float *const *inputBuffers,
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Vamp::RealTime timestamp)
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{
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if (m_blockSize == 0) {
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cerr << "ERROR: VampTruePeak::process: "
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<< "VampTruePeak has not been initialised"
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<< endl;
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return FeatureSet();
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}
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_meter.process (inputBuffers[0], m_blockSize);
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// TODO optional (not rt safe)
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if (_meter.read () >= .89125 /* -1dBTP */) {
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long f = Vamp::RealTime::realTime2Frame (timestamp, m_rate);
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_above_m1.values.push_back ((float) f);
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}
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return FeatureSet();
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}
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VampTruePeak::FeatureSet
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VampTruePeak::getRemainingFeatures()
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{
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FeatureSet returnFeatures;
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float m, p;
|
|
_meter.read(m, p);
|
|
|
|
Feature dbtp;
|
|
dbtp.hasTimestamp = false;
|
|
dbtp.values.push_back(p);
|
|
returnFeatures[0].push_back(dbtp);
|
|
|
|
_above_m1.hasTimestamp = false;
|
|
returnFeatures[1].push_back(_above_m1);
|
|
|
|
return returnFeatures;
|
|
}
|