1 // Copyright 2004 "Gilles Degottex"
2
3 // This file is part of "Music"
4
5 // "Music" is free software; you can redistribute it and/or modify
6 // it under the terms of the GNU Lesser General Public License as published by
7 // the Free Software Foundation; either version 2.1 of the License, or
8 // (at your option) any later version.
9 //
10 // "Music" is distributed in the hope that it will be useful,
11 // but WITHOUT ANY WARRANTY; without even the implied warranty of
12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 // GNU Lesser General Public License for more details.
14 //
15 // You should have received a copy of the GNU Lesser General Public License
16 // along with this program; if not, write to the Free Software
17 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18
19
20 #include "CumulativeDiff.h"
21
22 #include <iostream>
23 #include "Music.h"
24 using namespace Music;
25
CumulativeDiff(double latency_factor,int ht)26 CumulativeDiff::CumulativeDiff(double latency_factor, int ht)
27 : m_ht(ht)
28 , m_freq(h2f(m_ht))
29 , m_s(size_t(GetSamplingRate()/m_freq))
30 , m_latency_factor(latency_factor)
31 {
32 m_error = 0.0;
33
34 // cout << "CumulativeDiff::CumulativeDiff ht=" << ht << " AFreq="<<GetAFreq() << " freq=" << m_freq << endl;
35 }
36
receive(const deque<double> & buff,size_t start)37 void CumulativeDiff::receive(const deque<double>& buff, size_t start)
38 {
39 if(buff.size()<start+(m_latency_factor+1)*m_s) return;
40
41 m_error = 0.0;
42
43 for(size_t i=0; i<m_latency_factor*m_s; i++)
44 m_error += abs(buff[start+i] - buff[start+i+m_s]);
45 }
46
RangedCumulativeDiff(double pitch_tolerance,double latency_factor,int ht)47 RangedCumulativeDiff::RangedCumulativeDiff(double pitch_tolerance, double latency_factor, int ht)
48 : m_ht(ht)
49 , m_freq(h2f(m_ht))
50 , m_pitch_tolerance(pitch_tolerance)
51 , m_smin(size_t(GetSamplingRate()/(m_freq + m_pitch_tolerance*(h2f(m_ht+1)-m_freq))))
52 , m_smax(size_t(GetSamplingRate()/(m_freq + m_pitch_tolerance*(h2f(m_ht-1)-m_freq))))
53 , m_latency_factor(latency_factor)
54 {
55 m_error = 0.0;
56
57 // cout << "CumulativeDiff::CumulativeDiff ht=" << ht << " pitch_tol=" << m_pitch_tolerance << " seek_factor=" << m_seek_factor << " s=" << m_s << " smin=" << m_smin << " smax=" << m_smax << endl;
58 }
59
receive(const deque<double> & buff,size_t start)60 void RangedCumulativeDiff::receive(const deque<double>& buff, size_t start)
61 {
62 if(buff.size()<start+m_latency_factor*m_smax+m_smax) return;
63
64 m_error = 0.0;
65 m_min_error = 1000.0;
66 // int m=0;
67 for(size_t s=m_smin; s<=m_smax; s++)
68 {
69 double err = 0.0;
70 // size_t n = 0;
71
72 for(size_t i=0; i<m_latency_factor*s; i++)
73 {
74 err += abs(buff[start+i] - buff[start+i+s]);
75 // n++;
76 }
77
78 // err /= n;
79
80 if(err<m_min_error)
81 {
82 m_min_wave_length = s;
83 m_min_error = err;
84 }
85 // m_error = max(m_error, err);
86 m_error = m_min_error;
87 // cout << m_error << endl;
88 // m_error += err;
89 // m++;
90 }
91
92 // m_error /= m;
93 }
94
GetMinWaveLength(double pitch_tolerance,int ht,double & error,double min_wave_length)95 void RangedCumulativeDiff::GetMinWaveLength(double pitch_tolerance, int ht, double& error, double min_wave_length)
96 {
97 (void)pitch_tolerance;
98 (void)ht;
99 (void)error;
100 (void)min_wave_length;
101 }
102
103