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optimization of the FIR macros, extending outfreq range to 2..192khz 

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@7603 b3059339-0415-0410-9bf9-f77b7e298cf2
This commit is contained in:
arpi 2002-10-05 22:53:21 +00:00
parent 25d99f9d61
commit 8c465db577
1 changed files with 10 additions and 14 deletions
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24
libaf/af_resample.c
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@ -36,23 +36,19 @@
#define L 8 // Filter length
// Unrolled loop to speed up execution
#define FIR(x,w,y){ \
int16_t a = (w[0]*x[0]+w[1]*x[1]+w[2]*x[2]+w[3]*x[3]) >> 16; \
int16_t b = (w[4]*x[4]+w[5]*x[5]+w[6]*x[6]+w[7]*x[7]) >> 16; \
(y[0]) = a+b; \
}
#define FIR(x,w,y) \
(y[0]) = ( w[0]*x[0]+w[1]*x[1]+w[2]*x[2]+w[3]*x[3] \
+ w[4]*x[4]+w[5]*x[5]+w[6]*x[6]+w[7]*x[7] ) >> 16
#else /* Fast machine */
#define L 16
// Unrolled loop to speed up execution
#define FIR(x,w,y){ \
int16_t a = (w[0] *x[0] +w[1] *x[1] +w[2] *x[2] +w[3] *x[3] ) >> 16; \
int16_t b = (w[4] *x[4] +w[5] *x[5] +w[6] *x[6] +w[7] *x[7] ) >> 16; \
int16_t c = (w[8] *x[8] +w[9] *x[9] +w[10]*x[10]+w[11]*x[11]) >> 16; \
int16_t d = (w[12]*x[12]+w[13]*x[13]+w[14]*x[14]+w[15]*x[15]) >> 16; \
y[0] = (a+b+c+d) >> 1; \
}
#define FIR(x,w,y) \
y[0] = ( w[0] *x[0] +w[1] *x[1] +w[2] *x[2] +w[3] *x[3] \
+ w[4] *x[4] +w[5] *x[5] +w[6] *x[6] +w[7] *x[7] \
+ w[8] *x[8] +w[9] *x[9] +w[10]*x[10]+w[11]*x[11] \
+ w[12]*x[12]+w[13]*x[13]+w[14]*x[14]+w[15]*x[15] ) >> 16
#endif /* Fast machine */
@ -271,8 +267,8 @@ static int control(struct af_instance_s* af, int cmd, void* arg)
// Reinit must be called after this function has been called
// Sanity check
if(((int*)arg)[0] <= 8000 || ((int*)arg)[0] > 192000){
mp_msg(MSGT_AFILTER,MSGL_ERR,"[resample] The output sample frequency must be between 8kHz and 192kHz. Current value is %i \n",((int*)arg)[0]);
if(((int*)arg)[0] < 2000 || ((int*)arg)[0] > 192000){
mp_msg(MSGT_AFILTER,MSGL_ERR,"[resample] The output sample frequency must be between 2kHz and 192kHz. Current value is %i \n",((int*)arg)[0]);
return AF_ERROR;
}