dec3iir2.h

各种工程计算的库函数

/*

    IIR Decimation filter for rate 3
    Copyright (C) 2002 Jussi Laako

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

*/


#ifdef _MSC_VER
#pragma warning(disable:4305)
#endif


/* f1: 0.15,  f2: 0.16667, r: 0.1, a: 96, t: chebyshev */

static const long lDec3IIRSize = 14l;

static const float fpDec3IIRCoeffs[][5] = {
{  // 0
    0.20612381560143,
    0.41224763120286,
    0.20612381560143,
    1.16655653140295,
    -0.991051793808671
},
{  // 1
    0.199956923120078,
    0.399913846240156,
    0.199956923120078,
    1.17353927246339,
    -0.973366964943707
},
{  // 2
    0.189687762426556,
    0.379375524853111,
    0.189687762426556,
    1.19717435026578,
    -0.955925399971997
},
{  // 3
    0.175623636079266,
    0.351247272158532,
    0.175623636079266,
    1.2362163802201,
    -0.938710924537166
},
{  // 4
    0.158198347032725,
    0.316396694065451,
    0.158198347032725,
    1.28896470202014,
    -0.921758090151041
},
{  // 5
    0.138000902722861,
    0.276001805445723,
    0.138000902722861,
    1.35316505184281,
    -0.905168662734252
},
{  // 6
    0.115803473284191,
    0.231606946568382,
    0.115803473284191,
    1.4259115081258,
    -0.889125401262565
},
{  // 7
    0.0925789944055268,
    0.185157988811054,
    0.0925789944055268,
    1.50358434370774,
    -0.873900321329847
},
{  // 8
    0.0694962089224376,
    0.138992417844875,
    0.0694962089224376,
    1.58186857525216,
    -0.859853410941906
},
{  // 9
    0.0478793602979918,
    0.0957587205959835,
    0.0478793602979918,
    1.65589991979591,
    -0.847417360987876
},
{  // 10
    0.0291234398087895,
    0.058246879617579,
    0.0291234398087895,
    1.72057137841201,
    -0.837065137647169
},
{  // 11
    0.0145655023994335,
    0.029131004798867,
    0.0145655023994335,
    1.77099876568531,
    -0.829260775283047
},
{  // 12
    0.00532730800397216,
    0.0106546160079443,
    0.00532730800397216,
    1.8030900620617,
    -0.824399294077589
},
{  // 13
    0.0464728891735737,
    0.0464728891735737,
    0,
    0.907054221652853,
    0
}
};


static const double dpDec3IIRCoeffs[][5] = {
{  // 0
    0.20612381560143,
    0.41224763120286,
    0.20612381560143,
    1.16655653140295,
    -0.991051793808671
},
{  // 1
    0.199956923120078,
    0.399913846240156,
    0.199956923120078,
    1.17353927246339,
    -0.973366964943707
},
{  // 2
    0.189687762426556,
    0.379375524853111,
    0.189687762426556,
    1.19717435026578,
    -0.955925399971997
},
{  // 3
    0.175623636079266,
    0.351247272158532,
    0.175623636079266,
    1.2362163802201,
    -0.938710924537166
},
{  // 4
    0.158198347032725,
    0.316396694065451,
    0.158198347032725,
    1.28896470202014,
    -0.921758090151041
},
{  // 5
    0.138000902722861,
    0.276001805445723,
    0.138000902722861,
    1.35316505184281,
    -0.905168662734252
},
{  // 6
    0.115803473284191,
    0.231606946568382,
    0.115803473284191,
    1.4259115081258,
    -0.889125401262565
},
{  // 7
    0.0925789944055268,
    0.185157988811054,
    0.0925789944055268,
    1.50358434370774,
    -0.873900321329847
},
{  // 8
    0.0694962089224376,
    0.138992417844875,
    0.0694962089224376,
    1.58186857525216,
    -0.859853410941906
},
{  // 9
    0.0478793602979918,
    0.0957587205959835,
    0.0478793602979918,
    1.65589991979591,
    -0.847417360987876
},
{  // 10
    0.0291234398087895,
    0.058246879617579,
    0.0291234398087895,
    1.72057137841201,
    -0.837065137647169
},
{  // 11
    0.0145655023994335,
    0.029131004798867,
    0.0145655023994335,
    1.77099876568531,
    -0.829260775283047
},
{  // 12
    0.00532730800397216,
    0.0106546160079443,
    0.00532730800397216,
    1.8030900620617,
    -0.824399294077589
},
{  // 13
    0.0464728891735737,
    0.0464728891735737,
    0,
    0.907054221652853,
    0
}
};


/* f1: 0.15833,  f2: 0.16667, r: 0.1, a: 96, t: chebyshev */

/*static const long lDec3IIRSize = 20l;

static const float fpDec3IIRCoeffs[][5] = {
{ // 0
    0.227647824582658,
    0.455295649165315,
    0.227647824582658,
    1.08495246415859,
    -0.995543762489218
},
{ // 1
    0.224378347659029,
    0.448756695318058,
    0.224378347659029,
    1.08916692922144,
    -0.986680319857554
},
{ // 2
    0.218905291043542,
    0.437810582087085,
    0.218905291043542,
    1.10224473383073,
    -0.977865898004897
},
{ // 3
    0.211296387736946,
    0.422592775473892,
    0.211296387736946,
    1.12389926210344,
    -0.969084813051225
},
{ // 4
    0.201643794498987,
    0.403287588997973,
    0.201643794498987,
    1.1537527946667,
    -0.960327972662651
},
{ // 5
    0.190069159432337,
    0.380138318864675,
    0.190069159432337,
    1.19131858518897,
    -0.951595222918322
},
{ // 6
    0.176729858014251,
    0.353459716028503,
    0.176729858014251,
    1.23597829437787,
    -0.942897726434876
},
{ // 7
    0.161825942546065,
    0.323651885092129,
    0.161825942546065,
    1.28695654644334,
    -0.934260316627602
},
{ // 8
    0.145607142176726,
    0.291214284353452,
    0.145607142176726,
    1.34329513330297,
    -0.925723702009876
},
{ // 9
    0.128378994100325,
    0.256757988200649,
    0.128378994100325,
    1.40383033546985,
    -0.917346311871146
},
{ // 10
    0.110506911217153,
    0.221013822434305,
    0.110506911217153,
    1.46717784405167,
    -0.909205488920281
},
{ // 11
    0.0924167558091885,
    0.184833511618377,
    0.0924167558091885,
    1.53173063825525,
    -0.901397661492007
},
{ // 12
    0.0745903819092521,
    0.149180763818504,
    0.0745903819092521,
    1.59567556442442,
    -0.89403709206143
},
{ // 13
    0.0575547430637654,
    0.115109486127531,
    0.0575547430637654,
    1.65703385843447,
    -0.887252830689529
},
{ // 14
    0.0418636462936031,
    0.0837272925872063,
    0.0418636462936031,
    1.71372904627386,
    -0.881183631448273
},
{ // 15
    0.0280721285617954,
    0.0561442571235907,
    0.0280721285617954,
    1.76368231925819,
    -0.875970833505375
},
{ // 16
    0.0167046962058954,
    0.0334093924117908,
    0.0167046962058954,
    1.8049307695923,
    -0.871749554415877
},
{ // 17
    0.00822010940837615,
    0.0164402188167523,
    0.00822010940837615,
    1.83575850082831,
    -0.868638938461817
},
{ // 18
    0.00297667434446007,
    0.00595334868892014,
    0.00297667434446007,
    1.85482585687089,
    -0.866732554248732
},
{ // 19
    0.0346801557915072,
    0.0346801557915072,
    0,
    0.930639688416986,
    0
}
};


static const double dpDec3IIRCoeffs[][5] = {
{ // 0
    0.227647824582658,
    0.455295649165315,
    0.227647824582658,
    1.08495246415859,
    -0.995543762489218
},
{ // 1
    0.224378347659029,
    0.448756695318058,
    0.224378347659029,
    1.08916692922144,
    -0.986680319857554
},
{ // 2
    0.218905291043542,
    0.437810582087085,
    0.218905291043542,
    1.10224473383073,
    -0.977865898004897
},
{ // 3
    0.211296387736946,
    0.422592775473892,
    0.211296387736946,
    1.12389926210344,
    -0.969084813051225
},
{ // 4
    0.201643794498987,
    0.403287588997973,
    0.201643794498987,
    1.1537527946667,
    -0.960327972662651
},
{ // 5
    0.190069159432337,
    0.380138318864675,
    0.190069159432337,
    1.19131858518897,
    -0.951595222918322
},
{ // 6
    0.176729858014251,
    0.353459716028503,
    0.176729858014251,
    1.23597829437787,
    -0.942897726434876
},
{ // 7
    0.161825942546065,
    0.323651885092129,
    0.161825942546065,
    1.28695654644334,
    -0.934260316627602
},
{ // 8
    0.145607142176726,
    0.291214284353452,
    0.145607142176726,
    1.34329513330297,
    -0.925723702009876
},
{ // 9
    0.128378994100325,
    0.256757988200649,
    0.128378994100325,
    1.40383033546985,
    -0.917346311871146
},
{ // 10
    0.110506911217153,
    0.221013822434305,
    0.110506911217153,
    1.46717784405167,
    -0.909205488920281
},
{ // 11
    0.0924167558091885,
    0.184833511618377,
    0.0924167558091885,
    1.53173063825525,
    -0.901397661492007
},
{ // 12
    0.0745903819092521,
    0.149180763818504,
    0.0745903819092521,
    1.59567556442442,
    -0.89403709206143
},
{ // 13
    0.0575547430637654,
    0.115109486127531,
    0.0575547430637654,
    1.65703385843447,
    -0.887252830689529
},
{ // 14
    0.0418636462936031,
    0.0837272925872063,
    0.0418636462936031,
    1.71372904627386,
    -0.881183631448273
},
{ // 15
    0.0280721285617954,
    0.0561442571235907,
    0.0280721285617954,
    1.76368231925819,
    -0.875970833505375
},
{ // 16
    0.0167046962058954,
    0.0334093924117908,
    0.0167046962058954,
    1.8049307695923,
    -0.871749554415877
},
{ // 17
    0.00822010940837615,
    0.0164402188167523,
    0.00822010940837615,
    1.83575850082831,
    -0.868638938461817
},
{ // 18
    0.00297667434446007,
    0.00595334868892014,
    0.00297667434446007,
    1.85482585687089,
    -0.866732554248732
},
{ // 19
    0.0346801557915072,
    0.0346801557915072,
    0,
    0.930639688416986,
    0
}
};*/