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Code Issues Releases Wiki Activity

Fix illegal identifier: Rename _ftype_t macro to FLOAT_TYPE.

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git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@26382 b3059339-0415-0410-9bf9-f77b7e298cf2
This commit is contained in:
diego 2008-04-10 10:01:54 +00:00
parent 2a1bc4f6ec
commit 5910188a5e
5 changed files with 92 additions and 73 deletions
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2
libaf/dsp.h
View File

@ -14,7 +14,7 @@
/* Implementation of routines used for DSP */
/* Size of floating point type used in routines */
#define _ftype_t float
#define FLOAT_TYPE float
#include "window.h"
#include "filter.h"

66
libaf/filter.c
View File

@ -25,9 +25,10 @@
w filter taps
x input signal must be a circular buffer which is indexed backwards
*/
inline _ftype_t af_filter_fir(register unsigned int n, _ftype_t* w, _ftype_t* x)
inline FLOAT_TYPE af_filter_fir(register unsigned int n, FLOAT_TYPE* w,
FLOAT_TYPE* x)
{
register _ftype_t y; // Output
register FLOAT_TYPE y; // Output
y = 0.0;
do{
n--;
@ -46,10 +47,12 @@ inline _ftype_t af_filter_fir(register unsigned int n, _ftype_t* w, _ftype_t* x)
y output buffer
s output buffer stride
*/
_ftype_t* af_filter_pfir(unsigned int n, unsigned int d, unsigned int xi, _ftype_t** w, _ftype_t** x, _ftype_t* y, unsigned int s)
FLOAT_TYPE* af_filter_pfir(unsigned int n, unsigned int d, unsigned int xi,
FLOAT_TYPE** w, FLOAT_TYPE** x, FLOAT_TYPE* y,
unsigned int s)
{
register _ftype_t* xt = *x + xi;
register _ftype_t* wt = *w;
register FLOAT_TYPE* xt = *x + xi;
register FLOAT_TYPE* wt = *w;
register int nt = 2*n;
while(d-- > 0){
*y = af_filter_fir(n,wt,xt);
@ -65,9 +68,10 @@ _ftype_t* af_filter_pfir(unsigned int n, unsigned int d, unsigned int xi, _ftype
at the new samples, xi current index in xq and n the length of the
filter. xq must be n*2 by k big, s is the index for in.
*/
int af_filter_updatepq(unsigned int n, unsigned int d, unsigned int xi, _ftype_t** xq, _ftype_t* in, unsigned int s)
int af_filter_updatepq(unsigned int n, unsigned int d, unsigned int xi,
FLOAT_TYPE** xq, FLOAT_TYPE* in, unsigned int s)
{
register _ftype_t* txq = *xq + xi;
register FLOAT_TYPE* txq = *xq + xi;
register int nt = n*2;
while(d-- >0){
@ -95,18 +99,19 @@ int af_filter_updatepq(unsigned int n, unsigned int d, unsigned int xi, _ftype_t
returns 0 if OK, -1 if fail
*/
int af_filter_design_fir(unsigned int n, _ftype_t* w, _ftype_t* fc, unsigned int flags, _ftype_t opt)
int af_filter_design_fir(unsigned int n, FLOAT_TYPE* w, FLOAT_TYPE* fc,
unsigned int flags, FLOAT_TYPE opt)
{
unsigned int o = n & 1; // Indicator for odd filter length
unsigned int end = ((n + 1) >> 1) - o; // Loop end
unsigned int i; // Loop index
_ftype_t k1 = 2 * M_PI; // 2*pi*fc1
_ftype_t k2 = 0.5 * (_ftype_t)(1 - o);// Constant used if the filter has even length
_ftype_t k3; // 2*pi*fc2 Constant used in BP and BS design
_ftype_t g = 0.0; // Gain
_ftype_t t1,t2,t3; // Temporary variables
_ftype_t fc1,fc2; // Cutoff frequencies
FLOAT_TYPE k1 = 2 * M_PI; // 2*pi*fc1
FLOAT_TYPE k2 = 0.5 * (FLOAT_TYPE)(1 - o);// Constant used if the filter has even length
FLOAT_TYPE k3; // 2*pi*fc2 Constant used in BP and BS design
FLOAT_TYPE g = 0.0; // Gain
FLOAT_TYPE t1,t2,t3; // Temporary variables
FLOAT_TYPE fc1,fc2; // Cutoff frequencies
// Sanity check
if(!w || (n == 0)) return -1;
@ -150,7 +155,7 @@ int af_filter_design_fir(unsigned int n, _ftype_t* w, _ftype_t* fc, unsigned int
// Create filter
for (i=0 ; i<end ; i++){
t1 = (_ftype_t)(i+1) - k2;
t1 = (FLOAT_TYPE)(i+1) - k2;
w[end-i-1] = w[n-end+i] = w[end-i-1] * sin(k1 * t1)/(M_PI * t1); // Sinc
g += 2*w[end-i-1]; // Total gain in filter
}
@ -163,7 +168,7 @@ int af_filter_design_fir(unsigned int n, _ftype_t* w, _ftype_t* fc, unsigned int
// Create filter
for (i=0 ; i<end ; i++){
t1 = (_ftype_t)(i+1);
t1 = (FLOAT_TYPE)(i+1);
w[end-i-1] = w[n-end+i] = -1 * w[end-i-1] * sin(k1 * t1)/(M_PI * t1); // Sinc
g += ((i&1) ? (2*w[end-i-1]) : (-2*w[end-i-1])); // Total gain in filter
}
@ -188,7 +193,7 @@ int af_filter_design_fir(unsigned int n, _ftype_t* w, _ftype_t* fc, unsigned int
// Create filter
for (i=0 ; i<end ; i++){
t1 = (_ftype_t)(i+1) - k2;
t1 = (FLOAT_TYPE)(i+1) - k2;
t2 = sin(k3 * t1)/(M_PI * t1); // Sinc fc2
t3 = sin(k1 * t1)/(M_PI * t1); // Sinc fc1
g += w[end-i-1] * (t3 + t2); // Total gain in filter
@ -203,7 +208,7 @@ int af_filter_design_fir(unsigned int n, _ftype_t* w, _ftype_t* fc, unsigned int
// Create filter
for (i=0 ; i<end ; i++){
t1 = (_ftype_t)(i+1);
t1 = (FLOAT_TYPE)(i+1);
t2 = sin(k1 * t1)/(M_PI * t1); // Sinc fc1
t3 = sin(k3 * t1)/(M_PI * t1); // Sinc fc2
w[end-i-1] = w[n-end+i] = w[end-i-1] * (t2 - t3);
@ -233,12 +238,13 @@ int af_filter_design_fir(unsigned int n, _ftype_t* w, _ftype_t* fc, unsigned int
returns 0 if OK, -1 if fail
*/
int af_filter_design_pfir(unsigned int n, unsigned int k, _ftype_t* w, _ftype_t** pw, _ftype_t g, unsigned int flags)
int af_filter_design_pfir(unsigned int n, unsigned int k, FLOAT_TYPE* w,
FLOAT_TYPE** pw, FLOAT_TYPE g, unsigned int flags)
{
int l = (int)n/k; // Length of individual FIR filters
int i; // Counters
int j;
_ftype_t t; // g * w[i]
FLOAT_TYPE t; // g * w[i]
// Sanity check
if(l<1 || k<1 || !w || !pw)
@ -274,9 +280,9 @@ int af_filter_design_pfir(unsigned int n, unsigned int k, _ftype_t* w, _ftype_t*
Note that a0 is assumed to be 1, so there is no wrapping
of it.
*/
static void af_filter_prewarp(_ftype_t* a, _ftype_t fc, _ftype_t fs)
static void af_filter_prewarp(FLOAT_TYPE* a, FLOAT_TYPE fc, FLOAT_TYPE fs)
{
_ftype_t wp;
FLOAT_TYPE wp;
wp = 2.0 * fs * tan(M_PI * fc / fs);
a[2] = a[2]/(wp * wp);
a[1] = a[1]/wp;
@ -310,9 +316,10 @@ static void af_filter_prewarp(_ftype_t* a, _ftype_t fc, _ftype_t fs)
Return: On return, set coef z-domain coefficients and k to the gain
required to maintain overall gain = 1.0;
*/
static void af_filter_bilinear(_ftype_t* a, _ftype_t* b, _ftype_t* k, _ftype_t fs, _ftype_t *coef)
static void af_filter_bilinear(FLOAT_TYPE* a, FLOAT_TYPE* b, FLOAT_TYPE* k,
FLOAT_TYPE fs, FLOAT_TYPE *coef)
{
_ftype_t ad, bd;
FLOAT_TYPE ad, bd;
/* alpha (Numerator in s-domain) */
ad = 4. * a[2] * fs * fs + 2. * a[1] * fs + a[0];
@ -410,16 +417,17 @@ static void af_filter_bilinear(_ftype_t* a, _ftype_t* b, _ftype_t* k, _ftype_t f
return -1 if fail 0 if success.
*/
int af_filter_szxform(_ftype_t* a, _ftype_t* b, _ftype_t Q, _ftype_t fc, _ftype_t fs, _ftype_t *k, _ftype_t *coef)
int af_filter_szxform(FLOAT_TYPE* a, FLOAT_TYPE* b, FLOAT_TYPE Q, FLOAT_TYPE fc,
FLOAT_TYPE fs, FLOAT_TYPE *k, FLOAT_TYPE *coef)
{
_ftype_t at[3];
_ftype_t bt[3];
FLOAT_TYPE at[3];
FLOAT_TYPE bt[3];
if(!a || !b || !k || !coef || (Q>1000.0 || Q< 1.0))
return -1;
memcpy(at,a,3*sizeof(_ftype_t));
memcpy(bt,b,3*sizeof(_ftype_t));
memcpy(at,a,3*sizeof(FLOAT_TYPE));
memcpy(bt,b,3*sizeof(FLOAT_TYPE));
bt[1]/=Q;

24
libaf/filter.h
View File

@ -44,18 +44,28 @@
#define ODD 0x00000010 // Make filter HP
// Exported functions
extern _ftype_t af_filter_fir(unsigned int n, _ftype_t* w, _ftype_t* x);
extern FLOAT_TYPE af_filter_fir(unsigned int n, FLOAT_TYPE* w, FLOAT_TYPE* x);
extern _ftype_t* af_filter_pfir(unsigned int n, unsigned int k, unsigned int xi, _ftype_t** w, _ftype_t** x, _ftype_t* y, unsigned int s);
extern FLOAT_TYPE* af_filter_pfir(unsigned int n, unsigned int k,
unsigned int xi, FLOAT_TYPE** w,
FLOAT_TYPE** x, FLOAT_TYPE* y,
unsigned int s);
//extern int af_filter_updateq(unsigned int n, unsigned int xi, _ftype_t* xq, _ftype_t* in);
extern int af_filter_updatepq(unsigned int n, unsigned int k, unsigned int xi, _ftype_t** xq, _ftype_t* in, unsigned int s);
//extern int af_filter_updateq(unsigned int n, unsigned int xi,
// FLOAT_TYPE* xq, FLOAT_TYPE* in);
extern int af_filter_updatepq(unsigned int n, unsigned int k, unsigned int xi,
FLOAT_TYPE** xq, FLOAT_TYPE* in, unsigned int s);
extern int af_filter_design_fir(unsigned int n, _ftype_t* w, _ftype_t* fc, unsigned int flags, _ftype_t opt);
extern int af_filter_design_fir(unsigned int n, FLOAT_TYPE* w, FLOAT_TYPE* fc,
unsigned int flags, FLOAT_TYPE opt);
extern int af_filter_design_pfir(unsigned int n, unsigned int k, _ftype_t* w, _ftype_t** pw, _ftype_t g, unsigned int flags);
extern int af_filter_design_pfir(unsigned int n, unsigned int k, FLOAT_TYPE* w,
FLOAT_TYPE** pw, FLOAT_TYPE g,
unsigned int flags);
extern int af_filter_szxform(_ftype_t* a, _ftype_t* b, _ftype_t Q, _ftype_t fc, _ftype_t fs, _ftype_t *k, _ftype_t *coef);
extern int af_filter_szxform(FLOAT_TYPE* a, FLOAT_TYPE* b, FLOAT_TYPE Q,
FLOAT_TYPE fc, FLOAT_TYPE fs, FLOAT_TYPE *k,
FLOAT_TYPE *coef);
/* Add new data to circular queue designed to be used with a FIR
filter. xq is the circular queue, in pointing at the new sample, xi

59
libaf/window.c
View File

@ -24,7 +24,7 @@
// n window length
// w buffer for the window parameters
*/
void af_window_boxcar(int n, _ftype_t* w)
void af_window_boxcar(int n, FLOAT_TYPE* w)
{
int i;
// Calculate window coefficients
@ -44,16 +44,16 @@ void af_window_boxcar(int n, _ftype_t* w)
// n window length
// w buffer for the window parameters
*/
void af_window_triang(int n, _ftype_t* w)
void af_window_triang(int n, FLOAT_TYPE* w)
{
_ftype_t k1 = (_ftype_t)(n & 1);
_ftype_t k2 = 1/((_ftype_t)n + k1);
FLOAT_TYPE k1 = (FLOAT_TYPE)(n & 1);
FLOAT_TYPE k2 = 1/((FLOAT_TYPE)n + k1);
int end = (n + 1) >> 1;
int i;
// Calculate window coefficients
for (i=0 ; i<end ; i++)
w[i] = w[n-i-1] = (2.0*((_ftype_t)(i+1))-(1.0-k1))*k2;
w[i] = w[n-i-1] = (2.0*((FLOAT_TYPE)(i+1))-(1.0-k1))*k2;
}
@ -65,14 +65,14 @@ void af_window_triang(int n, _ftype_t* w)
// n window length
// w buffer for the window parameters
*/
void af_window_hanning(int n, _ftype_t* w)
void af_window_hanning(int n, FLOAT_TYPE* w)
{
int i;
_ftype_t k = 2*M_PI/((_ftype_t)(n+1)); // 2*pi/(N+1)
FLOAT_TYPE k = 2*M_PI/((FLOAT_TYPE)(n+1)); // 2*pi/(N+1)
// Calculate window coefficients
for (i=0; i<n; i++)
*w++ = 0.5*(1.0 - cos(k*(_ftype_t)(i+1)));
*w++ = 0.5*(1.0 - cos(k*(FLOAT_TYPE)(i+1)));
}
/*
@ -84,14 +84,14 @@ void af_window_hanning(int n, _ftype_t* w)
// n window length
// w buffer for the window parameters
*/
void af_window_hamming(int n,_ftype_t* w)
void af_window_hamming(int n,FLOAT_TYPE* w)
{
int i;
_ftype_t k = 2*M_PI/((_ftype_t)(n-1)); // 2*pi/(N-1)
FLOAT_TYPE k = 2*M_PI/((FLOAT_TYPE)(n-1)); // 2*pi/(N-1)
// Calculate window coefficients
for (i=0; i<n; i++)
*w++ = 0.54 - 0.46*cos(k*(_ftype_t)i);
*w++ = 0.54 - 0.46*cos(k*(FLOAT_TYPE)i);
}
/*
@ -103,15 +103,15 @@ void af_window_hamming(int n,_ftype_t* w)
// n window length
// w buffer for the window parameters
*/
void af_window_blackman(int n,_ftype_t* w)
void af_window_blackman(int n,FLOAT_TYPE* w)
{
int i;
_ftype_t k1 = 2*M_PI/((_ftype_t)(n-1)); // 2*pi/(N-1)
_ftype_t k2 = 2*k1; // 4*pi/(N-1)
FLOAT_TYPE k1 = 2*M_PI/((FLOAT_TYPE)(n-1)); // 2*pi/(N-1)
FLOAT_TYPE k2 = 2*k1; // 4*pi/(N-1)
// Calculate window coefficients
for (i=0; i<n; i++)
*w++ = 0.42 - 0.50*cos(k1*(_ftype_t)i) + 0.08*cos(k2*(_ftype_t)i);
*w++ = 0.42 - 0.50*cos(k1*(FLOAT_TYPE)i) + 0.08*cos(k2*(FLOAT_TYPE)i);
}
/*
@ -123,15 +123,16 @@ void af_window_blackman(int n,_ftype_t* w)
// n window length
// w buffer for the window parameters
*/
void af_window_flattop(int n,_ftype_t* w)
void af_window_flattop(int n,FLOAT_TYPE* w)
{
int i;
_ftype_t k1 = 2*M_PI/((_ftype_t)(n-1)); // 2*pi/(N-1)
_ftype_t k2 = 2*k1; // 4*pi/(N-1)
FLOAT_TYPE k1 = 2*M_PI/((FLOAT_TYPE)(n-1)); // 2*pi/(N-1)
FLOAT_TYPE k2 = 2*k1; // 4*pi/(N-1)
// Calculate window coefficients
for (i=0; i<n; i++)
*w++ = 0.2810638602 - 0.5208971735*cos(k1*(_ftype_t)i) + 0.1980389663*cos(k2*(_ftype_t)i);
*w++ = 0.2810638602 - 0.5208971735*cos(k1*(FLOAT_TYPE)i)
+ 0.1980389663*cos(k2*(FLOAT_TYPE)i);
}
/* Computes the 0th order modified Bessel function of the first kind.
@ -142,16 +143,16 @@ void af_window_flattop(int n,_ftype_t* w)
*/
#define BIZ_EPSILON 1E-21 // Max error acceptable
static _ftype_t besselizero(_ftype_t x)
static FLOAT_TYPE besselizero(FLOAT_TYPE x)
{
_ftype_t temp;
_ftype_t sum = 1.0;
_ftype_t u = 1.0;
_ftype_t halfx = x/2.0;
FLOAT_TYPE temp;
FLOAT_TYPE sum = 1.0;
FLOAT_TYPE u = 1.0;
FLOAT_TYPE halfx = x/2.0;
int n = 1;
do {
temp = halfx/(_ftype_t)n;
temp = halfx/(FLOAT_TYPE)n;
u *=temp * temp;
sum += u;
n++;
@ -186,17 +187,17 @@ static _ftype_t besselizero(_ftype_t x)
// 8.960 5.7 0.000275 -90
// 10.056 6.4 0.000087 -100
*/
void af_window_kaiser(int n, _ftype_t* w, _ftype_t b)
void af_window_kaiser(int n, FLOAT_TYPE* w, FLOAT_TYPE b)
{
_ftype_t tmp;
_ftype_t k1 = 1.0/besselizero(b);
FLOAT_TYPE tmp;
FLOAT_TYPE k1 = 1.0/besselizero(b);
int k2 = 1 - (n & 1);
int end = (n + 1) >> 1;
int i;
// Calculate window coefficients
for (i=0 ; i<end ; i++){
tmp = (_ftype_t)(2*i + k2) / ((_ftype_t)n - 1.0);
tmp = (FLOAT_TYPE)(2*i + k2) / ((FLOAT_TYPE)n - 1.0);
w[end-(1&(!k2))+i] = w[end-1-i] = k1 * besselizero(b*sqrt(1.0 - tmp*tmp));
}
}

14
libaf/window.h
View File

@ -22,12 +22,12 @@
#ifndef MPLAYER_WINDOW_H
#define MPLAYER_WINDOW_H
extern void af_window_boxcar(int n, _ftype_t* w);
extern void af_window_triang(int n, _ftype_t* w);
extern void af_window_hanning(int n, _ftype_t* w);
extern void af_window_hamming(int n,_ftype_t* w);
extern void af_window_blackman(int n,_ftype_t* w);
extern void af_window_flattop(int n,_ftype_t* w);
extern void af_window_kaiser(int n, _ftype_t* w,_ftype_t b);
extern void af_window_boxcar(int n, FLOAT_TYPE* w);
extern void af_window_triang(int n, FLOAT_TYPE* w);
extern void af_window_hanning(int n, FLOAT_TYPE* w);
extern void af_window_hamming(int n, FLOAT_TYPE* w);
extern void af_window_blackman(int n, FLOAT_TYPE* w);
extern void af_window_flattop(int n, FLOAT_TYPE* w);
extern void af_window_kaiser(int n, FLOAT_TYPE* w, FLOAT_TYPE b);
#endif /* MPLAYER_WINDOW_H */