har0ke/FFmpeg
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

vorbis_inverse_coupling_altivec

Browse Source 
Originally committed as revision 5914 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Luca Barbato 2006-08-03 13:19:32 +00:00
parent 90530cec20
commit 3b0df5254e
1 changed files with 23 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

23
libavcodec/ppc/dsputil_altivec.c
View File

@ -1698,6 +1698,29 @@ int has_altivec(void)
#endif /* __AMIGAOS4__ */
}
static void vorbis_inverse_coupling_altivec(float *mag, float *ang,
int blocksize)
{
int i;
vector float m, a;
vector bool int t0, t1;
const vector unsigned int v_31 = //XXX
vec_add(vec_add(vec_splat_u32(15),vec_splat_u32(15)),vec_splat_u32(1));
for(i=0; i<blocksize; i+=4) {
m = vec_ld(0, mag+i);
a = vec_ld(0, ang+i);
t0 = vec_cmple(m, (vector float)vec_splat_u32(0));
t1 = vec_cmple(a, (vector float)vec_splat_u32(0));
a = vec_xor(a, vec_sl((vector unsigned int)t0, v_31)); // (a ^ sign(m))
t0 = vec_and(a, t1);
t1 = vec_andc(a, t1);
a = vec_add(m, t0);
m = vec_sub(m, t1);
vec_ste(a, 0, ang+i);
vec_ste(m, 0, mag+i);
}
}
/* next one assumes that ((line_size % 8) == 0) */
void avg_pixels8_xy2_altivec(uint8_t *block, const uint8_t *pixels, int line_size, int h)
{