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Code

MMX part rewritten and 16 tap filter added for better sound qualty

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git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@4726 b3059339-0415-0410-9bf9-f77b7e298cf2
This commit is contained in:
anders 2002-02-16 13:08:14 +00:00
parent 6292bf2273
commit 1de3804595
3 changed files with 202 additions and 124 deletions
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131
libao2/filter.h
View File

@ -208,3 +208,134 @@
-5, 53, -279, 32759, 289, -55, 6, 0, \
-2, 18, -94, 32767, 95, -18, 2, 0, \
}
#define W16 {\
0, 0, -1, 3, -9, 21, -47, 119,32764, -118, 47, -21, 9, -3, 1, 0, \
0, 0, -3, 10, -27, 65, -143, 361,32757, -352, 141, -63, 27, -10, 3, 0, \
0, 1, -5, 17, -46, 108, -240, 607,32743, -581, 233, -105, 44, -16, 4, -1, \
0, 1, -6, 23, -65, 153, -338, 857,32722, -805, 324, -146, 61, -22, 6, -1, \
0, 1, -8, 30, -84, 197, -438, 1112,32695, -1025, 413, -187, 78, -28, 8, -1, \
0, 2, -10, 37, -103, 243, -538, 1370,32661, -1241, 502, -226, 95, -34, 9, -2, \
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0, 3, -14, 52, -142, 334, -740, 1898,32572, -1659, 674, -304, 127, -45, 12, -2, \
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-4, 34, -150, 465, -1176, 2651, -6027, 21945,18962, -5660, 2508, -1107, 433, -137, 31, -3, \
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-4, 37, -155, 475, -1190, 2675, -6122, 24118,16549, -5214, 2321, -1020, 395, -123, 27, -3, \
-4, 37, -156, 475, -1189, 2672, -6121, 24416,16200, -5140, 2290, -1005, 389, -121, 26, -2, \
-5, 37, -156, 475, -1187, 2666, -6115, 24710,15851, -5064, 2257, -991, 383, -119, 26, -2, \
-5, 37, -156, 474, -1185, 2659, -6106, 25000,15501, -4986, 2224, -975, 377, -117, 25, -2, \
-5, 37, -156, 474, -1182, 2651, -6093, 25286,15151, -4906, 2189, -959, 370, -114, 24, -2, \
-5, 37, -156, 473, -1177, 2640, -6075, 25568,14801, -4824, 2154, -943, 363, -112, 24, -2, \
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-5, 37, -155, 465, -1152, 2579, -5964, 26656,13399, -4476, 2003, -875, 335, -103, 21, -2, \
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-5, 37, -151, 451, -1113, 2488, -5783, 27672,12004, -4103, 1839, -801, 305, -93, 19, -2, \
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-4, 24, -90, 256, -617, 1371, -3310, 31837,4458, -1688, 761, -326, 120, -34, 6, 0, \
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-3, 21, -81, 230, -553, 1228, -2976, 32047,3865, -1474, 665, -284, 104, -30, 5, 0, \
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-3, 19, -71, 202, -486, 1077, -2623, 32230,3285, -1261, 569, -243, 89, -25, 5, 0, \
-3, 18, -66, 188, -451, 1000, -2440, 32312,3001, -1156, 521, -222, 81, -23, 4, 0, \
-3, 16, -61, 173, -415, 921, -2251, 32387,2720, -1051, 474, -202, 74, -21, 4, 0, \
-2, 15, -56, 158, -379, 840, -2058, 32455,2442, -947, 427, -182, 66, -19, 3, 0, \
-2, 14, -51, 143, -342, 758, -1861, 32517,2168, -843, 381, -162, 59, -17, 3, 0, \
-2, 12, -45, 127, -304, 674, -1659, 32572,1898, -740, 334, -142, 52, -14, 3, 0, \
-2, 11, -40, 111, -265, 588, -1452, 32620,1632, -639, 288, -122, 44, -12, 2, 0, \
-2, 9, -34, 95, -226, 502, -1241, 32661,1370, -538, 243, -103, 37, -10, 2, 0, \
-1, 8, -28, 78, -187, 413, -1025, 32695,1112, -438, 197, -84, 30, -8, 1, 0, \
-1, 6, -22, 61, -146, 324, -805, 32722,857, -338, 153, -65, 23, -6, 1, 0, \
-1, 4, -16, 44, -105, 233, -581, 32743,607, -240, 108, -46, 17, -5, 1, 0, \
0, 3, -10, 27, -63, 141, -352, 32757,361, -143, 65, -27, 10, -3, 0, 0, \
0, 1, -3, 9, -21, 47, -118, 32764,119, -47, 21, -9, 3, -1, 0, 0, \
}

168
libao2/fir.h
View File

@ -11,123 +11,75 @@
#ifndef __FIR_H__
#define __FIR_H__
/* 4, 8 and 16 tap FIR filters implemented using SSE instructions
int16_t* x Input data
int16_t* y Output value
int16_t* w Filter weights
C function
for(int i = 0 ; i < L ; i++)
*y += w[i]*x[i];
*/
/* Fixpoint 16 bit fir filter FIR filter. The filter is implemented
both in C and MMX assembly. The filter consists of one macro
UPDATE_QUE and one inline function firn. The macro can be used for
adding new data to the circular buffer used by the filter firn.
Limitations: max length of n = 16*4 and n must be multiple of 4 (pad
fiter with zeros for other lengths). Sometimes it works with filters
longer than 4*16 (the problem is overshoot and the acumulated energy
in the filter taps). */
#ifdef HAVE_SSE
#ifdef HAVE_MMX
inline int32_t firn(int16_t* x, int16_t* w, int16_t n)
{
register int32_t y; // Output
// Prologue
asm volatile(" pxor %mm1, %mm1;\n" ); // Clear buffer yt
// Main loop
while((n-=4)>=0){
asm volatile(
" movq (%1), %%mm0;\n" // Load x(n:n+4)
" pmaddwd (%0), %%mm0;\n" // yt(n:n+1)=sum(x(n:n+4).*w(n:n+4))
" psrld $16, %%mm0;\n" // yt(n:n+1)=yt(n:n+1)>>16
" paddd %%mm0, %%mm1;\n" // yt(n:n+1)=yt(n-2:n-1)+yt(n:n+1)
:: "r" (w), "r" (x));
w+=4; x+=4;
}
// Epilogue
asm volatile(
" movq %%mm1, %%mm0;\n"
" punpckhdq %%mm1, %%mm0;\n"
" paddd %%mm0, %%mm1;\n" //yt(n)=yt(n)+yt(n+1)
" movd %%mm1, %0 ;\n" //y=yt
" emms ;\n"
: "=&r" (y));
return y;
}
// This block should be MMX only compatible, but it isn't...
#ifdef L4
#define LOAD_QUE(x) \
__asm __volatile("movq %0, %%mm2\n\t" \
: \
:"m"((x)[0]) \
:"memory");
#define SAVE_QUE(x) \
__asm __volatile("movq %%mm2, %0\n\t" \
"emms \n\t" \
:"=m"(x[0]) \
: \
:"memory");
#define UPDATE_QUE(in) \
__asm __volatile("psllq $16, %%mm2\n\t" \
"pinsrw $0, %0,%%mm2\n\t" \
: \
:"m" ((in)[0]) \
:"memory");
#define FIR(x,w,y) \
__asm __volatile("movq %%mm2, %%mm0\n\t" \
"pmaddwd %1, %%mm0\n\t" \
"movq %%mm0, %%mm1\n\t" \
"psrlq $32, %%mm1\n\t" \
"paddd %%mm0, %%mm1\n\t" \
"movd %%mm1, %%esi\n\t" \
"shrl $16, %%esi\n\t" \
"movw %%si, %0\n\t" \
: "=m" ((y)[0]) \
: "m" ((w)[0]) \
: "memory", "%esi");
#endif /* L4 */
#else /* HAVE_MMX */
// Same thing as above but in C
inline int32_t firn(int16_t* x, int16_t* w, int16_t n)
{
register int32_t y=0;
while((n-=4) >=0)
y+=w[n]*x[n]+w[n+1]*x[n+1]+w[n+2]*x[n+2]+w[n+3]*x[n+3] >> 16;
return y;
}
#endif /* HAVE_MMX */
// Macro to add new data to circular queue
#define UPDATE_QUE(ind,xq,xid) \
xid=(--xid)&(L-1); \
xq[xid]=xq[xid+L]=*(ind);
// It is possible to make the 8 bit filter a lot faster by using the
// 128 bit registers, feel free to optimize.
#ifdef L8
#define LOAD_QUE(x) \
__asm __volatile("movq %0, %%mm5\n\t" \
"movq %1, %%mm4\n\t" \
: \
:"m"((x)[0]), \
"m"((x)[4]) \
:"memory");
#define SAVE_QUE(x) \
__asm __volatile("movq %%mm5, %0\n\t" \
"movq %%mm4, %1\n\t" \
"emms \n\t" \
:"=m"((x)[0]), \
"=m"((x)[4]) \
: \
:"memory");
// Below operation could replace line 2 to 5 in macro below but can
// not cause of compiler bug ???
// "pextrw $3, %%mm5,%%eax\n\t"
#define UPDATE_QUE(in) \
__asm __volatile("psllq $16, %%mm4\n\t" \
"movq %%mm5, %%mm0\n\t" \
"psrlq $48, %%mm0\n\t" \
"movd %%mm0, %%eax\n\t" \
"pinsrw $0, %%eax,%%mm4\n\t" \
"psllq $16, %%mm5\n\t" \
"pinsrw $0, %0,%%mm5\n\t" \
: \
:"m" ((in)[0]) \
:"memory", "%eax");
#define FIR(x,w,y) \
__asm __volatile("movq %%mm5, %%mm0\n\t" \
"pmaddwd %1, %%mm0\n\t" \
"movq %%mm4, %%mm1\n\t" \
"pmaddwd %2, %%mm1\n\t" \
"paddd %%mm1, %%mm0\n\t" \
"movq %%mm0, %%mm1\n\t" \
"psrlq $32, %%mm1\n\t" \
"paddd %%mm0, %%mm1\n\t" \
"movd %%mm1, %%esi\n\t" \
"shrl $16, %%esi\n\t" \
"movw %%si, %0\n\t" \
: "=m" ((y)[0]) \
: "m" ((w)[0]), \
"m" ((w)[4]) \
: "memory", "%esi");
#endif /* L8 */
#else /* HAVE_SSE */
#define LOAD_QUE(x)
#define SAVE_QUE(x)
#define UPDATE_QUE(inm) \
xi=(--xi)&(L-1); \
x[xi]=x[xi+L]=*(inm);
#ifdef L4
#define FIR(x,w,y) \
y[0]=(w[0]*x[0]+w[1]*x[1]+w[2]*x[2]+w[3]*x[3]) >> 16;
#else
#ifdef HAVE_MMX
#define FIR(x,w,y) *y=(int16_t)firn(x,w,8);
#else /* HAVE_MMX */
// 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; \
}
#endif /* L4 */
#endif /* HAVE_MMX */
#endif /* L8 */
#endif /* HAVE_SSE */
#ifdef L16
#define FIR(x,w,y) *y=(int16_t)firn(x,w,16);
#endif /* L16 */
#endif /* __FIR_H__ */

27
libao2/pl_resample.c
View File

@ -40,22 +40,22 @@ LIBAO_PLUGIN_EXTERN(resample)
#define max(a,b) (((a) > (b)) ? (a) : (b))
/* Below definition selects the length of each poly phase component.
Valid definitions are L4 and L8, where the number denotes the
Valid definitions are L8 and L16, where the number denotes the
length of the filter. This definition affects the computational
complexity (see play()), the performance (see filter.h) and the
memory usage. For now the filterlenght is choosen to 4 and without
assembly optimization if no SSE is present.
memory usage. The filterlenght is choosen to 8 if the machine is
slow and to 16 if the machine is fast and has MMX.
*/
// #ifdef HAVE_SSE
#if !defined(HAVE_SSE) && !defined(HAVE_3DNOW) //This machine is slow
#define L8 1 // Filter bank type
#define W W8 // Filter bank parameters
#define L 8 // Filter length
// #else
// #define L4 1
// #define W W4
// #define L 4
// #endif
#else // Fat machine
#define L16 1
#define W W16
#define L 16
#endif
#define CH 6 // Max number of channels
#define UP 128 /* Up sampling factor. Increasing this value will
@ -188,14 +188,12 @@ int upsample(){
wi = pwi; xi = pxi;
LOAD_QUE(x);
while(in < end){
register uint16_t i = inc;
if(wi<level) i++;
UPDATE_QUE(in);
UPDATE_QUE(in,x,xi);
in+=nch;
while(i--){
// Run the FIR filter
FIR((&x[xi]),(&w[wi*L]),out);
@ -204,7 +202,6 @@ int upsample(){
wi=(wi+dn)%up;
}
}
SAVE_QUE(x);
}
// Save values that needs to be kept for next time
@ -243,10 +240,9 @@ int downsample(){
register int16_t* end = in+ao_plugin_data.len/2;
i = pi; wi = pwi; xi = pxi;
LOAD_QUE(x);
while(in < end){
UPDATE_QUE(in);
UPDATE_QUE(in,x,xi);
in+=nch;
if(!--i){
@ -262,7 +258,6 @@ int downsample(){
if(wi<level) i++;
}
}
SAVE_QUE(x);
}
// Save values that needs to be kept for next time
pwi = wi;