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40% faster decode 

Originally committed as revision 5315 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Luca Barbato 2006-04-25 17:29:31 +00:00
parent ddbddce547
commit f420826c35
1 changed files with 17 additions and 4 deletions
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21
libavcodec/ppc/dsputil_snow_altivec.c
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@ -423,8 +423,8 @@ static void inner_add_yblock_bw_8_obmc_16_altivec(uint8_t *obmc,
{
int y, x;
DWTELEM * dst;
vector bool int mask;
vector signed int vs;
// vector bool int mask;
// vector signed int vs;
vector unsigned short h1, h2, l1, l2;
vector unsigned char ih, il, tmp1, tmp2, align;
vector unsigned char b0,b1,b2,b3;
@ -546,6 +546,18 @@ static void inner_add_yblock_bw_8_obmc_16_altivec(uint8_t *obmc,
#endif
#if 1
for(x=0; x<b_w; x++)
if(add){
vbuf[x] += dst[x + src_x];
vbuf[x] = (vbuf[x] + (1<<(FRAC_BITS-1))) >> FRAC_BITS;
if(vbuf[x]&(~255)) vbuf[x]= ~(vbuf[x]>>31);
dst8[x + y*src_stride] = vbuf[x];
}else{
dst[x + src_x] -= vbuf[x];
}
#else
if(add)
{
for(x=0; x<b_w/4; x++)
@ -579,7 +591,7 @@ static void inner_add_yblock_bw_8_obmc_16_altivec(uint8_t *obmc,
else
for(x=0; x<b_w/4; x++)
d[x] = vec_sub(d[x], v[x]);
#endif
}
@ -792,11 +804,12 @@ void ff_snow_inner_add_yblock_altivec(uint8_t *obmc, const int obmc_stride,
slice_buffer * sb, int add,
uint8_t * dst8)
{
//FIXME implement src_x&15 cases later
if (b_w == 16)
inner_add_yblock_bw_16_obmc_32_altivec(obmc, obmc_stride, block, b_w,
b_h, src_x, src_y, src_stride,
sb, add, dst8);
else if (b_w == 8 && ! src_x&15 )
else if (b_w == 8)
inner_add_yblock_bw_8_obmc_16_altivec(obmc, obmc_stride, block,
b_w, b_h, src_x, src_y,
src_stride, sb, add, dst8);