1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
|
//////////////////////////////////////////////////////////////////////
// noiseproc.cpp: implementation of the CNoiseProc class.
//
// This class implements various noise processing functions.
// Impulse blanker, Noise Reduction, and Notch
//
// History:
// 2011-01-06 Initial creation MSW
// 2011-03-27 Initial release(not implemented yet)
// 2013-07-28 Added single/double precision math macros
//////////////////////////////////////////////////////////////////////
//==========================================================================================
// + + + This Software is released under the "Simplified BSD License" + + +
//Copyright 2010 Moe Wheatley. All rights reserved.
//
//Redistribution and use in source and binary forms, with or without modification, are
//permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this list of
// conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright notice, this list
// of conditions and the following disclaimer in the documentation and/or other materials
// provided with the distribution.
//
//THIS SOFTWARE IS PROVIDED BY Moe Wheatley ``AS IS'' AND ANY EXPRESS OR IMPLIED
//WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
//FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL Moe Wheatley OR
//CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
//CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
//SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
//ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
//NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
//ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
//The views and conclusions contained in the software and documentation are those of the
//authors and should not be interpreted as representing official policies, either expressed
//or implied, of Moe Wheatley.
//==========================================================================================
#include "dsp/noiseproc.h"
#include "gui/testbench.h"
#include "interface/perform.h"
#include <QDebug>
//////////////////////////////////////////////////////////////////////
// Local Defines
//////////////////////////////////////////////////////////////////////
#define MAX_WIDTH 4096 //abt 1 mSec at 2MHz
#define MAX_DELAY 4096 //abt 1 mSec at 2MHz
#define MAX_AVE 32768 //abt 10 mSec at 2MHz
#define MAGAVE_TIME 0.005
//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////
CNoiseProc::CNoiseProc()
{
m_DelayBuf = new TYPECPX[MAX_DELAY];
m_MagBuf = new TYPEREAL[MAX_AVE];
m_TestBenchDataBuf = new TYPECPX[4096];
SetupBlanker(false, 50.0, 2.0, 1000.0);
}
CNoiseProc::~CNoiseProc()
{
if(m_DelayBuf)
delete m_DelayBuf;
if(m_MagBuf)
delete m_MagBuf;
if(m_TestBenchDataBuf)
delete m_TestBenchDataBuf;
}
void CNoiseProc::SetupBlanker(bool On, TYPEREAL Threshold, TYPEREAL Width, TYPEREAL SampleRate)
{
if( (Threshold==m_Threshold) &&
(Width==m_Width) &&
(m_On == On) &&
(SampleRate==SampleRate) )
{
return;
}
m_Mutex.lock();
m_On = On;
m_Threshold = Threshold;
m_Width = Width;
m_SampleRate = SampleRate;
m_WidthSamples = Width * 1e-6 * m_SampleRate;
if(m_WidthSamples < 1)
m_WidthSamples = 1;
else if(m_WidthSamples>MAX_WIDTH)
m_WidthSamples = MAX_WIDTH;
m_MagSamples = MAGAVE_TIME*m_SampleRate;
m_Ratio = .005*(m_Threshold)*(TYPEREAL)m_MagSamples;
m_DelaySamples = m_WidthSamples/2;
// qDebug()<<"m_DelaySamples="<<m_DelaySamples << m_Ratio;
m_Dptr = 0;
m_Mptr = 0;
m_BlankCounter = 0;
m_MagAveSum = 0.0;
for(int i=0; i<MAX_DELAY ; i++)
{
m_DelayBuf[i].re = 0.0;
m_DelayBuf[i].im = 0.0;
}
for(int i=0; i<MAX_AVE ; i++)
m_MagBuf[i] = 0.0;
m_Mutex.unlock();
}
void CNoiseProc::ProcessBlanker(int InLength, TYPECPX* pInData, TYPECPX* pOutData)
{
TYPECPX newsamp;
TYPECPX oldest;
if(!m_On)
{
g_pTestBench->DisplayData(InLength, 1.0, pOutData, m_SampleRate,PROFILE_7);
return;
}
m_Mutex.lock();
//StartPerformance();
for(int i=0; i<InLength; i++)
{
newsamp = pInData[i];
//calculate magnitude peak magnitude
TYPEREAL mre = MFABS(newsamp.re);
TYPEREAL mim = MFABS(newsamp.im);
TYPEREAL mag = (mre>mim) ? mre : mim;
//m_TestBenchDataBuf[i].im = mag;
//calc moving average of "m_MagSamples"
m_MagAveSum -= m_MagBuf[m_Mptr]; //subtract oldest sample
m_MagAveSum += mag; //add new sample
m_MagBuf[m_Mptr++] = mag; //stick in buffer
if(m_Mptr > m_MagSamples)
m_Mptr = 0;
//pull out oldest sample from delay buffer and put in new one
oldest = m_DelayBuf[m_Dptr];
m_DelayBuf[m_Dptr++] = newsamp;
if(m_Dptr > m_DelaySamples)
m_Dptr = 0;
if( mag*m_Ratio > m_MagAveSum )
{
m_BlankCounter = m_WidthSamples;
}
m_TestBenchDataBuf[i].im = oldest.re + oldest.im;
if(m_BlankCounter)
{
m_BlankCounter--;
m_TestBenchDataBuf[i].re = 0.0;
pOutData[i].re = 0.0;
pOutData[i].im = 0.0;
}
else
{
m_TestBenchDataBuf[i].re = m_MagAveSum/m_Ratio;
pOutData[i] = oldest;
}
}
m_Mutex.unlock();
//StopPerformance(InLength);
g_pTestBench->DisplayData(InLength, 1.0, m_TestBenchDataBuf, m_SampleRate,PROFILE_7);
}
|
