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authorGravatar arpi <arpi@b3059339-0415-0410-9bf9-f77b7e298cf2>2002-10-05 22:53:21 +0000
committerGravatar arpi <arpi@b3059339-0415-0410-9bf9-f77b7e298cf2>2002-10-05 22:53:21 +0000
commit8c465db5773df58f4e0a6529f05dbcdd181fe2df (patch)
tree068285de6388db297b2b1f48ae9b764f9578a7b0 /libaf
parent25d99f9d617e1108ec62077f78de27794116793a (diff)
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
Diffstat (limited to 'libaf')
-rw-r--r--libaf/af_resample.c24
1 files changed, 10 insertions, 14 deletions
diff --git a/libaf/af_resample.c b/libaf/af_resample.c
index 5c07d7ec19..31efb63cc9 100644
--- a/libaf/af_resample.c
+++ b/libaf/af_resample.c
@@ -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;
}