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Code Issues Releases Activity

MMX2 scaler: add variable to ease factorization of initMMX2Scaler().

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Originally committed as revision 29452 to svn://svn.mplayerhq.hu/mplayer/trunk/libswscale
This commit is contained in:
Ramiro Polla 2009-07-28 05:41:22 +00:00
parent cbdc08d5a6
commit 901775c714
1 changed files with 4 additions and 3 deletions
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7
libswscale/swscale.c
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@ -1888,6 +1888,7 @@ static void initMMX2HScaler(int dstW, int xInc, uint8_t *funnyCode, int16_t *fil
int b=((xpos+xInc)>>16) - xx;
int c=((xpos+xInc*2)>>16) - xx;
int d=((xpos+xInc*3)>>16) - xx;
int inc = (d+1<4);
filter[i ] = (( xpos & 0xFFFF) ^ 0xFFFF)>>9;
filter[i+1] = (((xpos+xInc ) & 0xFFFF) ^ 0xFFFF)>>9;
@ -1897,17 +1898,17 @@ static void initMMX2HScaler(int dstW, int xInc, uint8_t *funnyCode, int16_t *fil
if (d+1<4)
{
int maxShift= 3-(d+1);
int maxShift= 3-(d+inc);
int shift=0;
memcpy(funnyCode + fragmentPos, fragmentB, fragmentLengthB);
funnyCode[fragmentPos + imm8OfPShufW1B]=
(a+1) | ((b+1)<<2) | ((c+1)<<4) | ((d+1)<<6);
(a+inc) | ((b+inc)<<2) | ((c+inc)<<4) | ((d+inc)<<6);
funnyCode[fragmentPos + imm8OfPShufW2B]=
a | (b<<2) | (c<<4) | (d<<6);
if (i+3>=dstW) shift=maxShift; //avoid overread
if (i+4-inc>=dstW) shift=maxShift; //avoid overread
else if ((filterPos[i/2]&3) <= maxShift) shift=filterPos[i/2]&3; //Align
if (shift && i>=shift)