dec2iir3.h

各种工程计算的库函数

/*

    IIR Decimation filter for rate 2
    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: 0.24375,  f2: 0.25, r: 0.1, a: 96, t: elliptic */

/*static const long lDec2IIRSize = 8l;

static const float fpDec2IIRCoeffs[][5] = {
{ // 0
    0.0636055269017405,
    0.120237273165707,
    0.0636055269017405,
    1.10059257576193,
    -0.34804090273112
},
{ // 1
    0.197395100757952,
    0.251955931876418,
    0.197395100757952,
    0.853316818943547,
    -0.500062952335869
},
{ // 2
    0.416867536074146,
    0.291504346387221,
    0.416867536074146,
    0.557073607566323,
    -0.682313026101836
},
{ // 3
    0.630732106186422,
    0.220804780514429,
    0.630732106186422,
    0.336225336671185,
    -0.818494329558457
},
{ // 4
    0.786029157621284,
    0.12850692420049,
    0.786029157621284,
    0.201609680048344,
    -0.902174919491402
},
{ // 5
    0.881212080327745,
    0.0598200661289426,
    0.881212080327745,
    0.127415820574785,
    -0.949660047359217
},
{ // 6
    0.933417750217719,
    0.0197780000165418,
    0.933417750217719,
    0.0898376822944953,
    -0.976451182746475
},
{ // 7
    0.958297484517192,
    0.00209738478453047,
    0.958297484517192,
    0.0744385769165404,
    -0.993130930735456
}
};


static const double dpDec2IIRCoeffs[][5] = {
{ // 0
    0.0636055269017405,
    0.120237273165707,
    0.0636055269017405,
    1.10059257576193,
    -0.34804090273112
},
{ // 1
    0.197395100757952,
    0.251955931876418,
    0.197395100757952,
    0.853316818943547,
    -0.500062952335869
},
{ // 2
    0.416867536074146,
    0.291504346387221,
    0.416867536074146,
    0.557073607566323,
    -0.682313026101836
},
{ // 3
    0.630732106186422,
    0.220804780514429,
    0.630732106186422,
    0.336225336671185,
    -0.818494329558457
},
{ // 4
    0.786029157621284,
    0.12850692420049,
    0.786029157621284,
    0.201609680048344,
    -0.902174919491402
},
{ // 5
    0.881212080327745,
    0.0598200661289426,
    0.881212080327745,
    0.127415820574785,
    -0.949660047359217
},
{ // 6
    0.933417750217719,
    0.0197780000165418,
    0.933417750217719,
    0.0898376822944953,
    -0.976451182746475
},
{ // 7
    0.958297484517192,
    0.00209738478453047,
    0.958297484517192,
    0.0744385769165404,
    -0.993130930735456
}
};*/


/* f1: 0.24375,  f2: 0.25, r: 0.1, a: 120, t: elliptic */

static const long lDec2IIRSize = 10l;

static const float fpDec2IIRCoeffs[][5] = {
{ // 0
    0.0860883552986558,
    0.147454170614253,
    0.0860883552986558,
    1.13368419454638,
    -0.453315075757942
},
{ // 1
    0.230138726053264,
    0.265710323710514,
    0.230138726053264,
    0.862775228186636,
    -0.588763004003677
},
{ // 2
    0.423332055996105,
    0.290943741886257,
    0.423332055996105,
    0.58841934809913,
    -0.726027201977596
},
{ // 3
    0.607542248579554,
    0.233820176523996,
    0.607542248579554,
    0.381064569119293,
    -0.829969242802397
},
{ // 4
    0.749928014882175,
    0.154162195076207,
    0.749928014882175,
    0.244691516068237,
    -0.898709740908793
},
{ // 5
    0.846567103431297,
    0.0869479806425298,
    0.846567103431297,
    0.161336299588397,
    -0.94141848709352
},
{ // 6
    0.906783436809245,
    0.0409329790075077,
    0.906783436809245,
    0.112953857197871,
    -0.96745370982387
},
{ // 7
    0.941531243802369,
    0.0138152282315155,
    0.941531243802369,
    0.0868712028407657,
    -0.98374891867702
},
{ // 8
    0.958970880382364,
    0.00148441353321557,
    0.958970880382364,
    0.0756521632465086,
    -0.995078337544452
},
{ // 9
    0.186490176427825,
    0.186490176427825,
    0,
    0.627019647144349,
    0
}
};


static const double dpDec2IIRCoeffs[][5] = {
{ // 0
    0.0860883552986558,
    0.147454170614253,
    0.0860883552986558,
    1.13368419454638,
    -0.453315075757942
},
{ // 1
    0.230138726053264,
    0.265710323710514,
    0.230138726053264,
    0.862775228186636,
    -0.588763004003677
},
{ // 2
    0.423332055996105,
    0.290943741886257,
    0.423332055996105,
    0.58841934809913,
    -0.726027201977596
},
{ // 3
    0.607542248579554,
    0.233820176523996,
    0.607542248579554,
    0.381064569119293,
    -0.829969242802397
},
{ // 4
    0.749928014882175,
    0.154162195076207,
    0.749928014882175,
    0.244691516068237,
    -0.898709740908793
},
{ // 5
    0.846567103431297,
    0.0869479806425298,
    0.846567103431297,
    0.161336299588397,
    -0.94141848709352
},
{ // 6
    0.906783436809245,
    0.0409329790075077,
    0.906783436809245,
    0.112953857197871,
    -0.96745370982387
},
{ // 7
    0.941531243802369,
    0.0138152282315155,
    0.941531243802369,
    0.0868712028407657,
    -0.98374891867702
},
{ // 8
    0.958970880382364,
    0.00148441353321557,
    0.958970880382364,
    0.0756521632465086,
    -0.995078337544452
},
{ // 9
    0.186490176427825,
    0.186490176427825,
    0,
    0.627019647144349,
    0
}
};