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optimization 

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@7079 b3059339-0415-0410-9bf9-f77b7e298cf2
This commit is contained in:
michael 2002-08-23 21:55:57 +00:00
parent 325311af33
commit cfa281e0ef
1 changed files with 23 additions and 21 deletions
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44
libmpcodecs/vf_eq.c
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@ -31,48 +31,49 @@ static void process_MMX(unsigned char *dest, int dstride, unsigned char *src, in
int sstep = sstride-w;
short brvec[4];
short contvec[4];
short centvec[4] = { -128, -128, -128, -128 };
brightness = ((brightness+100)*511)/200-128;
contrast = ((contrast+100)*256)/200;
contrast = ((contrast+100)*256*16)/100;
brightness = ((brightness+100)*511)/200-128 - contrast/32;
brvec[0] = brvec[1] = brvec[2] = brvec[3] = brightness;
contvec[0] = contvec[1] = contvec[2] = contvec[3] = contrast;
while (h--) {
asm (
asm volatile (
"movq (%5), %%mm3 \n\t"
"movq (%6), %%mm4 \n\t"
"movq (%7), %%mm5 \n\t"
"pxor %%mm0, %%mm0 \n\t"
"movl %4, %%eax\n\t"
".align 16 \n\t"
"1: \n\t"
"movq (%0), %%mm1 \n\t"
"movq (%0), %%mm2 \n\t"
"punpcklbw %%mm0, %%mm1 \n\t"
"punpckhbw %%mm0, %%mm2 \n\t"
"paddw %%mm5, %%mm1 \n\t"
"paddw %%mm5, %%mm2 \n\t"
"pmullw %%mm4, %%mm1 \n\t"
"pmullw %%mm4, %%mm2 \n\t"
"psraw $7, %%mm1 \n\t"
"psraw $7, %%mm2 \n\t"
"paddsw %%mm3, %%mm1 \n\t"
"paddsw %%mm3, %%mm2 \n\t"
"psllw $4, %%mm1 \n\t"
"psllw $4, %%mm2 \n\t"
"pmulhw %%mm4, %%mm1 \n\t"
"pmulhw %%mm4, %%mm2 \n\t"
"paddw %%mm3, %%mm1 \n\t"
"paddw %%mm3, %%mm2 \n\t"
"packuswb %%mm2, %%mm1 \n\t"
"addl $8, %0 \n\t"
"movq %%mm1, (%1) \n\t"
"addl $8, %1 \n\t"
"decl %4 \n\t"
"decl %%eax \n\t"
"jnz 1b \n\t"
: "=r" (src), "=r" (dest)
: "0" (src), "1" (dest), "r" (w/8), "r" (brvec), "r" (contvec), "r" (centvec)
: "0" (src), "1" (dest), "r" (w>>3), "r" (brvec), "r" (contvec)
: "%eax"
);
for (i = w&7; i; i--)
{
pel = ((*src++ - 128) * contrast)/256 + brightness;
*dest++ = pel > 255 ? 255 : (pel < 0 ? 0 : pel);
pel = ((*src++* contrast)>>12) + brightness;
if(pel&768) pel = (-pel)>>31;
*dest++ = pel;
}
src += sstep;
dest += dstep;
}
@ -88,14 +89,15 @@ static void process_C(unsigned char *dest, int dstride, unsigned char *src, int
int dstep = dstride-w;
int sstep = sstride-w;
brightness = ((brightness+100)*511)/200-128;
contrast = ((contrast+100)*256)/200;
contrast = ((contrast+100)*256*256)/100;
brightness = ((brightness+100)*511)/200-128 - contrast/512;
while (h--) {
for (i = w; i; i--)
{
pel = ((*src++ - 128) * contrast)/128 + brightness;
*dest++ = pel > 255 ? 255 : (pel < 0 ? 0 : pel);
pel = ((*src++* contrast)>>16) + brightness;
if(pel&768) pel = (-pel)>>31;
*dest++ = pel;
}
src += sstep;
dest += dstep;