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support for 28 kHz sample rate -> sample rate conversion is not working correctly right now, TODO find the bug

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This commit is contained in:
Volker Fischer 2008-08-06 06:51:46 +00:00
parent 5fe78dda7d
commit f425bf3d8b
3 changed files with 405 additions and 216 deletions
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15
src/resample.cpp
View file

@ -204,6 +204,12 @@ void CAudioResample::Init ( const int iNewInputBlockSize,
iI = DECIM_D_2; iI = DECIM_D_2;
break; break;
case ( SND_CRD_SAMPLE_RATE * 7 / 12 ): // 48 kHz to 28 kHz
pFiltTaps = fResTaps12_7;
iNumTaps = INTERP_I_12_7 * NUM_TAPS_PER_PHASE12_7;
iI = DECIM_D_12_7;
break;
case ( SND_CRD_SAMPLE_RATE * 2 / 3 ): // 48 kHz to 32 kHz case ( SND_CRD_SAMPLE_RATE * 2 / 3 ): // 48 kHz to 32 kHz
pFiltTaps = fResTaps3_2; pFiltTaps = fResTaps3_2;
iNumTaps = INTERP_I_3_2 * NUM_TAPS_PER_PHASE3_2; iNumTaps = INTERP_I_3_2 * NUM_TAPS_PER_PHASE3_2;
@ -212,6 +218,9 @@ void CAudioResample::Init ( const int iNewInputBlockSize,
case SND_CRD_SAMPLE_RATE: // 48 kHz to 48 kHz case SND_CRD_SAMPLE_RATE: // 48 kHz to 48 kHz
// no resampling needed // no resampling needed
pFiltTaps = NULL;
iNumTaps = 0;
iI = 1;
break; break;
default: default:
@ -230,6 +239,12 @@ void CAudioResample::Init ( const int iNewInputBlockSize,
iI = INTERP_I_2; iI = INTERP_I_2;
break; break;
case ( SND_CRD_SAMPLE_RATE * 7 / 12 ): // 28 kHz to 48 kHz
pFiltTaps = fResTaps12_7;
iNumTaps = DECIM_D_12_7 * NUM_TAPS_PER_PHASE12_7;
iI = INTERP_I_12_7;
break;
case ( SND_CRD_SAMPLE_RATE * 2 / 3 ): // 32 kHz to 48 kHz case ( SND_CRD_SAMPLE_RATE * 2 / 3 ): // 32 kHz to 48 kHz
pFiltTaps = fResTaps3_2; pFiltTaps = fResTaps3_2;
iNumTaps = DECIM_D_3_2 * NUM_TAPS_PER_PHASE3_2; iNumTaps = DECIM_D_3_2 * NUM_TAPS_PER_PHASE3_2;

578
src/resamplefilter.h
View file

@ -1,213 +1,365 @@
/* Automatically generated file with MATLAB */ /* Automatically generated file with MATLAB */
/* File name: "ResampleFilter.m" */ /* File name: "ResampleFilter.m" */
/* Filter taps in time-domain */ /* Filter taps in time-domain */
#ifndef _RESAMPLEFILTER_H_ #ifndef _RESAMPLEFILTER_H_
#define _RESAMPLEFILTER_H_ #define _RESAMPLEFILTER_H_
#define NUM_TAPS_PER_PHASE2 12 #define NUM_TAPS_PER_PHASE2 12
#define NUM_TAPS_PER_PHASE3_2 12 #define NUM_TAPS_PER_PHASE3_2 12
#define NUM_TAPS_PER_PHASE1 12 #define NUM_TAPS_PER_PHASE12_7 12
#define INTERP_I_2 2 #define NUM_TAPS_PER_PHASE1 12
#define DECIM_D_2 1 #define INTERP_I_2 2
#define INTERP_I_3_2 3 #define DECIM_D_2 1
#define DECIM_D_3_2 2 #define INTERP_I_3_2 3
#define INTERP_DECIM_I_D1 10 #define DECIM_D_3_2 2
#define INTERP_I_12_7 12
#define DECIM_D_12_7 7
#define INTERP_DECIM_I_D1 10
// Filter for ratio 2
static float fResTaps2[INTERP_I_2 * DECIM_D_2 * NUM_TAPS_PER_PHASE2] = {
-0.00197231219263642580f,
-0.00149441363437698710f, // Filter for ratio 2
0.00978643021021321540f, static float fResTaps2[INTERP_I_2 * DECIM_D_2 * NUM_TAPS_PER_PHASE2] = {
0.00681767720964485820f, -0.00197231219263642580f,
-0.02671025414462463400f, -0.00149441363437698710f,
-0.02086828471078093500f, 0.00978643021021321540f,
0.05837045639157300400f, 0.00681767720964485820f,
0.05384957575491138700f, -0.02671025414462463400f,
-0.11980958828278984000f, -0.02086828471078093500f,
-0.14170168497101379000f, 0.05837045639157300400f,
0.30855591451377506000f, 0.05384957575491138700f,
0.87515091657445054000f, -0.11980958828278984000f,
0.87515091657445054000f, -0.14170168497101379000f,
0.30855591451377506000f, 0.30855591451377506000f,
-0.14170168497101379000f, 0.87515091657445054000f,
-0.11980958828278984000f, 0.87515091657445054000f,
0.05384957575491138700f, 0.30855591451377506000f,
0.05837045639157300400f, -0.14170168497101379000f,
-0.02086828471078093500f, -0.11980958828278984000f,
-0.02671025414462463400f, 0.05384957575491138700f,
0.00681767720964485820f, 0.05837045639157300400f,
0.00978643021021321540f, -0.02086828471078093500f,
-0.00149441363437698710f, -0.02671025414462463400f,
-0.00197231219263642580f 0.00681767720964485820f,
}; 0.00978643021021321540f,
-0.00149441363437698710f,
-0.00197231219263642580f
// Filter for ratio 3 / 2 };
static float fResTaps3_2[INTERP_I_3_2 * DECIM_D_3_2 * NUM_TAPS_PER_PHASE3_2] = {
-0.00176046250093099540f,
-0.00336610762581997370f, // Filter for ratio 3 / 2
-0.00023822280323501131f, static float fResTaps3_2[INTERP_I_3_2 * DECIM_D_3_2 * NUM_TAPS_PER_PHASE3_2] = {
0.00833859487742245890f, -0.00176046250093099540f,
0.01339722511380138700f, -0.00336610762581997370f,
0.00269922033961634070f, -0.00023822280323501131f,
-0.02185973842102897900f, 0.00833859487742245890f,
-0.03569929574814127000f, 0.01339722511380138700f,
-0.01106578529670297800f, 0.00269922033961634070f,
0.04574010538564617100f, -0.02185973842102897900f,
0.08068909318354972000f, -0.03569929574814127000f,
0.03356421112732931000f, -0.01106578529670297800f,
-0.08888051700234801700f, 0.04574010538564617100f,
-0.18084907976234993000f, 0.08068909318354972000f,
-0.10021438259584969000f, 0.03356421112732931000f,
0.20666894693494509000f, -0.08888051700234801700f,
0.62554698344706861000f, -0.18084907976234993000f,
0.92713992460312022000f, -0.10021438259584969000f,
0.92713992460312022000f, 0.20666894693494509000f,
0.62554698344706861000f, 0.62554698344706861000f,
0.20666894693494509000f, 0.92713992460312022000f,
-0.10021438259584969000f, 0.92713992460312022000f,
-0.18084907976234993000f, 0.62554698344706861000f,
-0.08888051700234801700f, 0.20666894693494509000f,
0.03356421112732931000f, -0.10021438259584969000f,
0.08068909318354972000f, -0.18084907976234993000f,
0.04574010538564617100f, -0.08888051700234801700f,
-0.01106578529670297800f, 0.03356421112732931000f,
-0.03569929574814127000f, 0.08068909318354972000f,
-0.02185973842102897900f, 0.04574010538564617100f,
0.00269922033961634070f, -0.01106578529670297800f,
0.01339722511380138700f, -0.03569929574814127000f,
0.00833859487742245890f, -0.02185973842102897900f,
-0.00023822280323501131f, 0.00269922033961634070f,
-0.00336610762581997370f, 0.01339722511380138700f,
-0.00176046250093099540f 0.00833859487742245890f,
}; -0.00023822280323501131f,
-0.00336610762581997370f,
// Filter for ratios close to 1 -0.00176046250093099540f
static float fResTaps1[INTERP_DECIM_I_D1 * NUM_TAPS_PER_PHASE1] = { };
-0.00129181992672801360f,
-0.00207886551285772290f,
-0.00287519800425638110f, // Filter for ratio 12 / 7
-0.00354120720771153910f, static float fResTaps12_7[INTERP_I_12_7 * DECIM_D_12_7 * NUM_TAPS_PER_PHASE12_7] = {
-0.00391755659664638590f, -0.00125208827289417920f,
-0.00384568128202934270f, -0.00190626448556412160f,
-0.00319259334815649940f, -0.00258725330105407910f,
-0.00187713739944610450f, -0.00321911699468315850f,
0.00010586149691723067f, -0.00371304124871946240f,
0.00266742068076876060f, -0.00397449433584967650f,
0.00561586829442904840f, -0.00391226244728601170f,
0.00866090598717600930f, -0.00344872729447937270f,
0.01143197533872717000f, -0.00253053775303447700f,
0.01351098086300389300f, -0.00113866891904707700f,
0.01447751287549226700f, 0.00070321859502462086f,
0.01396276906259418800f, 0.00292319218332290870f,
0.01170664402374247200f, 0.00539918825312160800f,
0.00761119378345958850f, 0.00796161187294208010f,
0.00178311012364952820f, 0.01040080648737300700f,
-0.00544188094946287510f, 0.01247940789020031800f,
-0.01349857823816511800f, 0.01394914970162503700f,
-0.02161960909069559500f, 0.01457122611642731000f,
-0.02889142869399521600f, 0.01413888175955135800f,
-0.03433664370844288100f, 0.01250052994177179200f,
-0.03701682481313090000f, 0.00958143947199255330f,
-0.03614676421513295800f, 0.00540191094345563410f,
-0.03120859084480779800f, 0.00008991148771200068f,
-0.02205265100214613000f, -0.00611363430350713410f,
-0.00897188476756275060f, -0.01285829127084545300f,
0.00726225824406205160f, -0.01969712096259990500f,
0.02541150940858524100f, -0.02610936928229550000f,
0.04383507935997314800f, -0.03153216669657662300f,
0.06060641890050100900f, -0.03539975740910365800f,
0.07367662235517660800f, -0.03718799481084937600f,
0.08107302414568577600f, -0.03646116541074920900f,
0.08111657494320076400f, -0.03291769690105803700f,
0.07263788052016696700f, -0.02643102432092192500f,
0.05516985095031713000f, -0.01708187424006729600f,
0.02909509423931267600f, -0.00517850526744063640f,
-0.00427135103965109450f, 0.00873798258468762820f,
-0.04267869501534898200f, 0.02390530685294215600f,
-0.08302470868585065700f, 0.03936958373129542700f,
-0.12152802242786863000f, 0.05403253332659402300f,
-0.15398027155782226000f, 0.06671467306160311400f,
-0.17606165300033697000f, 0.07623153406248735200f,
-0.18369620562420094000f, 0.08147871600785833200f,
-0.17341770937821352000f, 0.08152058589868019200f,
-0.14271415809850990000f, 0.07567671586657001600f,
-0.09031872116141286000f, 0.06359981811742342100f,
-0.01641812005088002400f, 0.04533902176348663500f,
0.07724474282951483700f, 0.02138286854317816500f,
0.18738870090358245000f, -0.00732262749824698880f,
0.30933747340895279000f, -0.03938414980169741000f,
0.43728178746780866000f, -0.07300109067071840200f,
0.56464344237183917000f, -0.10603511604421303000f,
0.68451472884717957000f, -0.13610699820077277000f,
0.79013921003423337000f, -0.16071647179549162000f,
0.87539536840978205000f, -0.17737908657056814000f,
0.93524350914423104000f, -0.18377255785167662000f,
0.96609875058711103000f, -0.17788407020636693000f,
0.96609875058711103000f, -0.15814946187689599000f,
0.93524350914423104000f, -0.12357526654261679000f,
0.87539536840978205000f, -0.07383523520087217900f,
0.79013921003423337000f, -0.00933418413014485730f,
0.68451472884717957000f, 0.06876624614792664600f,
0.56464344237183917000f, 0.15856318013703752000f,
0.43728178746780866000f, 0.25747026200729783000f,
0.30933747340895279000f, 0.36231581851199790000f,
0.18738870090358245000f, 0.46947713391879947000f,
0.07724474282951483700f, 0.57504420553142555000f,
-0.01641812005088002400f, 0.67500437604388086000f,
-0.09031872116141286000f, 0.76543776689193965000f,
-0.14271415809850990000f, 0.84271257101448604000f,
-0.17341770937821352000f, 0.90366907084389148000f,
-0.18369620562420094000f, 0.94578175032061074000f,
-0.17606165300033697000f, 0.96729004417063957000f,
-0.15398027155782226000f, 0.96729004417063957000f,
-0.12152802242786863000f, 0.94578175032061074000f,
-0.08302470868585065700f, 0.90366907084389148000f,
-0.04267869501534898200f, 0.84271257101448604000f,
-0.00427135103965109450f, 0.76543776689193965000f,
0.02909509423931267600f, 0.67500437604388086000f,
0.05516985095031713000f, 0.57504420553142555000f,
0.07263788052016696700f, 0.46947713391879947000f,
0.08111657494320076400f, 0.36231581851199790000f,
0.08107302414568577600f, 0.25747026200729783000f,
0.07367662235517660800f, 0.15856318013703752000f,
0.06060641890050100900f, 0.06876624614792664600f,
0.04383507935997314800f, -0.00933418413014485730f,
0.02541150940858524100f, -0.07383523520087217900f,
0.00726225824406205160f, -0.12357526654261679000f,
-0.00897188476756275060f, -0.15814946187689599000f,
-0.02205265100214613000f, -0.17788407020636693000f,
-0.03120859084480779800f, -0.18377255785167662000f,
-0.03614676421513295800f, -0.17737908657056814000f,
-0.03701682481313090000f, -0.16071647179549162000f,
-0.03433664370844288100f, -0.13610699820077277000f,
-0.02889142869399521600f, -0.10603511604421303000f,
-0.02161960909069559500f, -0.07300109067071840200f,
-0.01349857823816511800f, -0.03938414980169741000f,
-0.00544188094946287510f, -0.00732262749824698880f,
0.00178311012364952820f, 0.02138286854317816500f,
0.00761119378345958850f, 0.04533902176348663500f,
0.01170664402374247200f, 0.06359981811742342100f,
0.01396276906259418800f, 0.07567671586657001600f,
0.01447751287549226700f, 0.08152058589868019200f,
0.01351098086300389300f, 0.08147871600785833200f,
0.01143197533872717000f, 0.07623153406248735200f,
0.00866090598717600930f, 0.06671467306160311400f,
0.00561586829442904840f, 0.05403253332659402300f,
0.00266742068076876060f, 0.03936958373129542700f,
0.00010586149691723067f, 0.02390530685294215600f,
-0.00187713739944610450f, 0.00873798258468762820f,
-0.00319259334815649940f, -0.00517850526744063640f,
-0.00384568128202934270f, -0.01708187424006729600f,
-0.00391755659664638590f, -0.02643102432092192500f,
-0.00354120720771153910f, -0.03291769690105803700f,
-0.00287519800425638110f, -0.03646116541074920900f,
-0.00207886551285772290f, -0.03718799481084937600f,
-0.00129181992672801360f -0.03539975740910365800f,
}; -0.03153216669657662300f,
-0.02610936928229550000f,
-0.01969712096259990500f,
#endif /* _RESAMPLEFILTER_H_ */ -0.01285829127084545300f,
-0.00611363430350713410f,
0.00008991148771200068f,
0.00540191094345563410f,
0.00958143947199255330f,
0.01250052994177179200f,
0.01413888175955135800f,
0.01457122611642731000f,
0.01394914970162503700f,
0.01247940789020031800f,
0.01040080648737300700f,
0.00796161187294208010f,
0.00539918825312160800f,
0.00292319218332290870f,
0.00070321859502462086f,
-0.00113866891904707700f,
-0.00253053775303447700f,
-0.00344872729447937270f,
-0.00391226244728601170f,
-0.00397449433584967650f,
-0.00371304124871946240f,
-0.00321911699468315850f,
-0.00258725330105407910f,
-0.00190626448556412160f,
-0.00125208827289417920f
};
// Filter for ratios close to 1
static float fResTaps1[INTERP_DECIM_I_D1 * NUM_TAPS_PER_PHASE1] = {
-0.00129181992672801360f,
-0.00207886551285772290f,
-0.00287519800425638110f,
-0.00354120720771153910f,
-0.00391755659664638590f,
-0.00384568128202934270f,
-0.00319259334815649940f,
-0.00187713739944610450f,
0.00010586149691723067f,
0.00266742068076876060f,
0.00561586829442904840f,
0.00866090598717600930f,
0.01143197533872717000f,
0.01351098086300389300f,
0.01447751287549226700f,
0.01396276906259418800f,
0.01170664402374247200f,
0.00761119378345958850f,
0.00178311012364952820f,
-0.00544188094946287510f,
-0.01349857823816511800f,
-0.02161960909069559500f,
-0.02889142869399521600f,
-0.03433664370844288100f,
-0.03701682481313090000f,
-0.03614676421513295800f,
-0.03120859084480779800f,
-0.02205265100214613000f,
-0.00897188476756275060f,
0.00726225824406205160f,
0.02541150940858524100f,
0.04383507935997314800f,
0.06060641890050100900f,
0.07367662235517660800f,
0.08107302414568577600f,
0.08111657494320076400f,
0.07263788052016696700f,
0.05516985095031713000f,
0.02909509423931267600f,
-0.00427135103965109450f,
-0.04267869501534898200f,
-0.08302470868585065700f,
-0.12152802242786863000f,
-0.15398027155782226000f,
-0.17606165300033697000f,
-0.18369620562420094000f,
-0.17341770937821352000f,
-0.14271415809850990000f,
-0.09031872116141286000f,
-0.01641812005088002400f,
0.07724474282951483700f,
0.18738870090358245000f,
0.30933747340895279000f,
0.43728178746780866000f,
0.56464344237183917000f,
0.68451472884717957000f,
0.79013921003423337000f,
0.87539536840978205000f,
0.93524350914423104000f,
0.96609875058711103000f,
0.96609875058711103000f,
0.93524350914423104000f,
0.87539536840978205000f,
0.79013921003423337000f,
0.68451472884717957000f,
0.56464344237183917000f,
0.43728178746780866000f,
0.30933747340895279000f,
0.18738870090358245000f,
0.07724474282951483700f,
-0.01641812005088002400f,
-0.09031872116141286000f,
-0.14271415809850990000f,
-0.17341770937821352000f,
-0.18369620562420094000f,
-0.17606165300033697000f,
-0.15398027155782226000f,
-0.12152802242786863000f,
-0.08302470868585065700f,
-0.04267869501534898200f,
-0.00427135103965109450f,
0.02909509423931267600f,
0.05516985095031713000f,
0.07263788052016696700f,
0.08111657494320076400f,
0.08107302414568577600f,
0.07367662235517660800f,
0.06060641890050100900f,
0.04383507935997314800f,
0.02541150940858524100f,
0.00726225824406205160f,
-0.00897188476756275060f,
-0.02205265100214613000f,
-0.03120859084480779800f,
-0.03614676421513295800f,
-0.03701682481313090000f,
-0.03433664370844288100f,
-0.02889142869399521600f,
-0.02161960909069559500f,
-0.01349857823816511800f,
-0.00544188094946287510f,
0.00178311012364952820f,
0.00761119378345958850f,
0.01170664402374247200f,
0.01396276906259418800f,
0.01447751287549226700f,
0.01351098086300389300f,
0.01143197533872717000f,
0.00866090598717600930f,
0.00561586829442904840f,
0.00266742068076876060f,
0.00010586149691723067f,
-0.00187713739944610450f,
-0.00319259334815649940f,
-0.00384568128202934270f,
-0.00391755659664638590f,
-0.00354120720771153910f,
-0.00287519800425638110f,
-0.00207886551285772290f,
-0.00129181992672801360f
};
#endif /* _RESAMPLEFILTER_H_ */

28
src/resamplefilter.m
View file

@ -9,9 +9,10 @@
function resamplefilter() function resamplefilter()
% Number of taps per poly phase for different resampling types % Number of taps per poly phase for different resampling types
NoTapsP2 = 12; NoTapsP2 = 12; % 24 kHz
NoTapsP3_2 = 12; NoTapsP3_2 = 12; % 32 kHz
NoTapsP1 = 12; NoTapsP12_7 = 12; % 28 kHz
NoTapsP1 = 12; % 48 kHz
% Filter for ratio 2 ----------------------------------------------------------- % Filter for ratio 2 -----------------------------------------------------------
@ -32,6 +33,15 @@ D3_2 = 2;
h3_2 = DesignFilter(NoTapsP3_2, I3_2); h3_2 = DesignFilter(NoTapsP3_2, I3_2);
% Filter for ratio 12 / 7 ------------------------------------------------------
% I and D
I12_7 = 12;
D12_7 = 7;
% filter design
h12_7 = DesignFilter(NoTapsP12_7, I12_7);
% Filter for ratios close to 1 ------------------------------------------------- % Filter for ratios close to 1 -------------------------------------------------
% Fixed for sample-rate conversiones of R ~ 1 % Fixed for sample-rate conversiones of R ~ 1
I1 = 10; % D = I in this mode I1 = 10; % D = I in this mode
@ -56,6 +66,9 @@ fprintf(fid, '\n');
fprintf(fid, '#define NUM_TAPS_PER_PHASE3_2 '); fprintf(fid, '#define NUM_TAPS_PER_PHASE3_2 ');
fprintf(fid, int2str(NoTapsP3_2)); fprintf(fid, int2str(NoTapsP3_2));
fprintf(fid, '\n'); fprintf(fid, '\n');
fprintf(fid, '#define NUM_TAPS_PER_PHASE12_7 ');
fprintf(fid, int2str(NoTapsP12_7));
fprintf(fid, '\n');
fprintf(fid, '#define NUM_TAPS_PER_PHASE1 '); fprintf(fid, '#define NUM_TAPS_PER_PHASE1 ');
fprintf(fid, int2str(NoTapsP1)); fprintf(fid, int2str(NoTapsP1));
fprintf(fid, '\n'); fprintf(fid, '\n');
@ -71,6 +84,12 @@ fprintf(fid, '\n');
fprintf(fid, '#define DECIM_D_3_2 '); fprintf(fid, '#define DECIM_D_3_2 ');
fprintf(fid, int2str(D3_2)); fprintf(fid, int2str(D3_2));
fprintf(fid, '\n'); fprintf(fid, '\n');
fprintf(fid, '#define INTERP_I_12_7 ');
fprintf(fid, int2str(I12_7));
fprintf(fid, '\n');
fprintf(fid, '#define DECIM_D_12_7 ');
fprintf(fid, int2str(D12_7));
fprintf(fid, '\n');
fprintf(fid, '#define INTERP_DECIM_I_D1 '); fprintf(fid, '#define INTERP_DECIM_I_D1 ');
fprintf(fid, int2str(I1)); fprintf(fid, int2str(I1));
fprintf(fid, '\n'); fprintf(fid, '\n');
@ -83,6 +102,9 @@ ExportFilterTaps(fid, 'fResTaps2[INTERP_I_2 * DECIM_D_2 * NUM_TAPS_PER_PHASE2]',
fprintf(fid, '\n// Filter for ratio 3 / 2\n'); fprintf(fid, '\n// Filter for ratio 3 / 2\n');
ExportFilterTaps(fid, 'fResTaps3_2[INTERP_I_3_2 * DECIM_D_3_2 * NUM_TAPS_PER_PHASE3_2]', h3_2); ExportFilterTaps(fid, 'fResTaps3_2[INTERP_I_3_2 * DECIM_D_3_2 * NUM_TAPS_PER_PHASE3_2]', h3_2);
fprintf(fid, '\n// Filter for ratio 12 / 7\n');
ExportFilterTaps(fid, 'fResTaps12_7[INTERP_I_12_7 * DECIM_D_12_7 * NUM_TAPS_PER_PHASE12_7]', h12_7);
fprintf(fid, '// Filter for ratios close to 1\n'); fprintf(fid, '// Filter for ratios close to 1\n');
ExportFilterTaps(fid, 'fResTaps1[INTERP_DECIM_I_D1 * NUM_TAPS_PER_PHASE1]', h1); ExportFilterTaps(fid, 'fResTaps1[INTERP_DECIM_I_D1 * NUM_TAPS_PER_PHASE1]', h1);