virtualenv/FFmpeg
1
0
Fork 0
mirror of https://github.com/FFmpeg/FFmpeg.git synced 2025-01-13 21:28:01 +02:00
Code Issues Releases Activity

Forgotten accurate rounding function YSCALEYUV2YV121_ACCURATE.

Browse Source 
Originally committed as revision 27321 to svn://svn.mplayerhq.hu/mplayer/trunk/libswscale
This commit is contained in:
Michael Niedermayer 2008-07-17 23:42:06 +00:00
parent 7bae01c62c
commit bf2bdde67a
1 changed files with 31 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

33
libswscale/swscale_template.c
View File

@ -181,6 +181,24 @@
"add $8, %%"REG_a" \n\t"\
"jnc 1b \n\t"
#define YSCALEYUV2YV121_ACCURATE \
"mov %2, %%"REG_a" \n\t"\
"pcmpeqw %%mm7, %%mm7 \n\t"\
"psrlw $15, %%mm7 \n\t"\
"psllw $6, %%mm7 \n\t"\
ASMALIGN(4) /* FIXME Unroll? */\
"1: \n\t"\
"movq (%0, %%"REG_a", 2), %%mm0 \n\t"\
"movq 8(%0, %%"REG_a", 2), %%mm1 \n\t"\
"paddw %%mm7, %%mm0 \n\t"\
"paddw %%mm7, %%mm1 \n\t"\
"psraw $7, %%mm0 \n\t"\
"psraw $7, %%mm1 \n\t"\
"packuswb %%mm1, %%mm0 \n\t"\
MOVNTQ(%%mm0, (%1, %%REGa))\
"add $8, %%"REG_a" \n\t"\
"jnc 1b \n\t"
/*
:: "m" (-lumFilterSize), "m" (-chrFilterSize),
"m" (lumMmxFilter+lumFilterSize*4), "m" (chrMmxFilter+chrFilterSize*4),
@ -969,7 +987,7 @@ yuv2nv12XinC(lumFilter, lumSrc, lumFilterSize,
dest, uDest, dstW, chrDstW, dstFormat);
}
static inline void RENAME(yuv2yuv1)(int16_t *lumSrc, int16_t *chrSrc,
static inline void RENAME(yuv2yuv1)(SwsContext *c, int16_t *lumSrc, int16_t *chrSrc,
uint8_t *dest, uint8_t *uDest, uint8_t *vDest, long dstW, long chrDstW)
{
#ifdef HAVE_MMX
@ -978,6 +996,16 @@ static inline void RENAME(yuv2yuv1)(int16_t *lumSrc, int16_t *chrSrc,
uint8_t *dst[3]= {dest, uDest, vDest};
long counter[3] = {dstW, chrDstW, chrDstW};
if (c->flags & SWS_ACCURATE_RND){
while(p--){
asm volatile(
YSCALEYUV2YV121_ACCURATE
:: "r" (src[p]), "r" (dst[p] + counter[p]),
"g" (-counter[p])
: "%"REG_a
);
}
}else{
while(p--){
asm volatile(
YSCALEYUV2YV121
@ -986,6 +1014,7 @@ static inline void RENAME(yuv2yuv1)(int16_t *lumSrc, int16_t *chrSrc,
: "%"REG_a
);
}
}
#else
int i;
@ -3178,7 +3207,7 @@ static int RENAME(swScale)(SwsContext *c, uint8_t* src[], int srcStride[], int s
{
int16_t *lumBuf = lumPixBuf[0];
int16_t *chrBuf= chrPixBuf[0];
RENAME(yuv2yuv1)(lumBuf, chrBuf, dest, uDest, vDest, dstW, chrDstW);
RENAME(yuv2yuv1)(c, lumBuf, chrBuf, dest, uDest, vDest, dstW, chrDstW);
}
else //General YV12
{