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FFmpeg/libavcodec/ppc/snow_altivec.c
Diego Biurrun a1d0b6a277 cosmetics: Fix AltiVec spelling. 
Originally committed as revision 10639 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-10-02 10:34:57 +00:00

790 lines
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/*
* AltiVec-optimized snow DSP utils
* Copyright (c) 2006 Luca Barbato <lu_zero@gentoo.org>
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "dsputil.h"
#include "gcc_fixes.h"
#include "dsputil_altivec.h"
#include "snow.h"
#undef NDEBUG
#include <assert.h>
//FIXME remove this replication
#define slice_buffer_get_line(slice_buf, line_num) ((slice_buf)->line[line_num] ? (slice_buf)->line[line_num] : slice_buffer_load_line((slice_buf), (line_num)))
static DWTELEM * slice_buffer_load_line(slice_buffer * buf, int line)
{
int offset;
DWTELEM * buffer;
// av_log(NULL, AV_LOG_DEBUG, "Cache hit: %d\n", line);
assert(buf->data_stack_top >= 0);
// assert(!buf->line[line]);
if (buf->line[line])
return buf->line[line];
offset = buf->line_width * line;
buffer = buf->data_stack[buf->data_stack_top];
buf->data_stack_top--;
buf->line[line] = buffer;
// av_log(NULL, AV_LOG_DEBUG, "slice_buffer_load_line: line: %d remaining: %d\n", line, buf->data_stack_top + 1);
return buffer;
}
//altivec code
void ff_snow_horizontal_compose97i_altivec(IDWTELEM *b, int width)
{
#if 0
const int w2= (width+1)>>1;
DECLARE_ALIGNED_16(IDWTELEM, temp[(width>>1)]);
const int w_l= (width>>1);
const int w_r= w2 - 1;
int i;
vector signed short t1, t2, x, y, tmp1, tmp2;
vector signed short *vbuf, *vtmp;
vector unsigned char align;
{ // Lift 0
IDWTELEM * const ref = b + w2 - 1;
IDWTELEM b_0 = b[0];
vector signed short v7 = vec_splat_s16(7);
vbuf = (vector signed short *)b;
tmp1 = vec_ld (0, ref);
align = vec_lvsl (0, ref);
tmp2 = vec_ld (15, ref);
t1 = vec_perm(tmp1, tmp2, align);
for (i=0; i<w_l-15; i+=16) {
#if 0
/* b[i+0] = b[i+0] - ((3 * (ref[i+0] + ref[i+1]) + 4) >> 3);
b[i+1] = b[i+1] - ((3 * (ref[i+1] + ref[i+2]) + 4) >> 3);
b[i+2] = b[i+2] - ((3 * (ref[i+2] + ref[i+3]) + 4) >> 3);
b[i+3] = b[i+3] - ((3 * (ref[i+3] + ref[i+4]) + 4) >> 3);*/
b[i+0] = b[i+0] + ((7 * (ref[i+0] + ref[i+1])-1) >> 8);
#else
tmp1 = vec_ld (0, ref+8+i);
tmp2 = vec_ld (15, ref+8+i);
t2 = vec_perm(tmp1, tmp2, align);
y = vec_add(t1, vec_sld(t1,t2,2));
// y = vec_add(vec_add(y,y),y);
tmp1 = vec_ld (0, ref+12+i);
y = vec_add(y, vec_splat_s32(4));
y = vec_sra(y, vec_splat_u32(3));
tmp2 = vec_ld (15, ref+12+i);
*vbuf = vec_sub(*vbuf, y);
t1 = t2;
vbuf++;
t2 = vec_perm(tmp1, tmp2, align);
y = vec_add(t1,vec_sld(t1,t2,4));
y = vec_add(vec_add(y,y),y);
tmp1 = vec_ld (0, ref+12+i);
y = vec_add(y, vec_splat_s32(4));
y = vec_sra(y, vec_splat_u32(3));
tmp2 = vec_ld (15, ref+12+i);
*vbuf = vec_sub(*vbuf, y);
t1=t2;
vbuf++;
t2 = vec_perm(tmp1, tmp2, align);
y = vec_add(t1,vec_sld(t1,t2,4));
y = vec_add(vec_add(y,y),y);
tmp1 = vec_ld (0, ref+16+i);
y = vec_add(y, vec_splat_s32(4));
y = vec_sra(y, vec_splat_u32(3));
tmp2 = vec_ld (15, ref+16+i);
*vbuf = vec_sub(*vbuf, y);
t1=t2;
t2 = vec_perm(tmp1, tmp2, align);
y = vec_add(t1,vec_sld(t1,t2,4));
y = vec_add(vec_add(y,y),y);
vbuf++;
y = vec_add(y, vec_splat_s32(4));
y = vec_sra(y, vec_splat_u32(3));
*vbuf = vec_sub(*vbuf, y);
t1=t2;
vbuf++;
#endif
}
snow_horizontal_compose_lift_lead_out(i, b, b, ref, width, w_l, 0, W_DM, W_DO, W_DS);
b[0] = b_0 - ((W_DM * 2 * ref[1]+W_DO)>>W_DS);
}
{ // Lift 1
DWTELEM * const dst = b+w2;
i = 0;
for(; (((long)&dst[i]) & 0xF) && i<w_r; i++){
dst[i] = dst[i] - (b[i] + b[i + 1]);
}
align = vec_lvsl(0, b+i);
tmp1 = vec_ld(0, b+i);
vbuf = (vector signed int*) (dst + i);
tmp2 = vec_ld(15, b+i);
t1 = vec_perm(tmp1, tmp2, align);
for (; i<w_r-3; i+=4) {
#if 0
dst[i] = dst[i] - (b[i] + b[i + 1]);
dst[i+1] = dst[i+1] - (b[i+1] + b[i + 2]);
dst[i+2] = dst[i+2] - (b[i+2] + b[i + 3]);
dst[i+3] = dst[i+3] - (b[i+3] + b[i + 4]);
#else
tmp1 = vec_ld(0, b+4+i);
tmp2 = vec_ld(15, b+4+i);
t2 = vec_perm(tmp1, tmp2, align);
y = vec_add(t1, vec_sld(t1,t2,4));
*vbuf = vec_sub (*vbuf, y);
vbuf++;
t1 = t2;
#endif
}
snow_horizontal_compose_lift_lead_out(i, dst, dst, b, width, w_r, 1, W_CM, W_CO, W_CS);
}
{ // Lift 2
DWTELEM * const ref = b+w2 - 1;
DWTELEM b_0 = b[0];
vbuf= (vector signed int *) b;
tmp1 = vec_ld (0, ref);
align = vec_lvsl (0, ref);
tmp2 = vec_ld (15, ref);
t1= vec_perm(tmp1, tmp2, align);
i = 0;
for (; i<w_l-15; i+=16) {
#if 0
b[i] = b[i] - (((8 -(ref[i] + ref[i+1])) - (b[i] <<2)) >> 4);
b[i+1] = b[i+1] - (((8 -(ref[i+1] + ref[i+2])) - (b[i+1]<<2)) >> 4);
b[i+2] = b[i+2] - (((8 -(ref[i+2] + ref[i+3])) - (b[i+2]<<2)) >> 4);
b[i+3] = b[i+3] - (((8 -(ref[i+3] + ref[i+4])) - (b[i+3]<<2)) >> 4);
#else
tmp1 = vec_ld (0, ref+4+i);
tmp2 = vec_ld (15, ref+4+i);
t2 = vec_perm(tmp1, tmp2, align);
y = vec_add(t1,vec_sld(t1,t2,4));
y = vec_sub(vec_splat_s32(8),y);
tmp1 = vec_ld (0, ref+8+i);
x = vec_sl(*vbuf,vec_splat_u32(2));
y = vec_sra(vec_sub(y,x),vec_splat_u32(4));
tmp2 = vec_ld (15, ref+8+i);
*vbuf = vec_sub( *vbuf, y);
t1 = t2;
vbuf++;
t2 = vec_perm(tmp1, tmp2, align);
y = vec_add(t1,vec_sld(t1,t2,4));
y = vec_sub(vec_splat_s32(8),y);
tmp1 = vec_ld (0, ref+12+i);
x = vec_sl(*vbuf,vec_splat_u32(2));
y = vec_sra(vec_sub(y,x),vec_splat_u32(4));
tmp2 = vec_ld (15, ref+12+i);
*vbuf = vec_sub( *vbuf, y);
t1 = t2;
vbuf++;
t2 = vec_perm(tmp1, tmp2, align);
y = vec_add(t1,vec_sld(t1,t2,4));
y = vec_sub(vec_splat_s32(8),y);
tmp1 = vec_ld (0, ref+16+i);
x = vec_sl(*vbuf,vec_splat_u32(2));
y = vec_sra(vec_sub(y,x),vec_splat_u32(4));
tmp2 = vec_ld (15, ref+16+i);
*vbuf = vec_sub( *vbuf, y);
t1 = t2;
vbuf++;
t2 = vec_perm(tmp1, tmp2, align);
y = vec_add(t1,vec_sld(t1,t2,4));
y = vec_sub(vec_splat_s32(8),y);
t1 = t2;
x = vec_sl(*vbuf,vec_splat_u32(2));
y = vec_sra(vec_sub(y,x),vec_splat_u32(4));
*vbuf = vec_sub( *vbuf, y);
vbuf++;
#endif
}
snow_horizontal_compose_liftS_lead_out(i, b, b, ref, width, w_l);
b[0] = b_0 - (((-2 * ref[1] + W_BO) - 4 * b_0) >> W_BS);
}
{ // Lift 3
DWTELEM * const src = b+w2;
vbuf = (vector signed int *)b;
vtmp = (vector signed int *)temp;
i = 0;
align = vec_lvsl(0, src);
for (; i<w_r-3; i+=4) {
#if 0
temp[i] = src[i] - ((-3*(b[i] + b[i+1]))>>1);
temp[i+1] = src[i+1] - ((-3*(b[i+1] + b[i+2]))>>1);
temp[i+2] = src[i+2] - ((-3*(b[i+2] + b[i+3]))>>1);
temp[i+3] = src[i+3] - ((-3*(b[i+3] + b[i+4]))>>1);
#else
tmp1 = vec_ld(0,src+i);
t1 = vec_add(vbuf[0],vec_sld(vbuf[0],vbuf[1],4));
tmp2 = vec_ld(15,src+i);
t1 = vec_sub(vec_splat_s32(0),t1); //bad!
t1 = vec_add(t1,vec_add(t1,t1));
t2 = vec_perm(tmp1 ,tmp2 ,align);
t1 = vec_sra(t1,vec_splat_u32(1));
vbuf++;
*vtmp = vec_sub(t2,t1);
vtmp++;
#endif
}
snow_horizontal_compose_lift_lead_out(i, temp, src, b, width, w_r, 1, -3, 0, 1);
}
{
//Interleave
int a;
vector signed int *t = (vector signed int *)temp,
*v = (vector signed int *)b;
snow_interleave_line_header(&i, width, b, temp);
for (; (i & 0xE) != 0xE; i-=2){
b[i+1] = temp[i>>1];
b[i] = b[i>>1];
}
for (i-=14; i>=0; i-=16){
a=i/4;
v[a+3]=vec_mergel(v[(a>>1)+1],t[(a>>1)+1]);
v[a+2]=vec_mergeh(v[(a>>1)+1],t[(a>>1)+1]);
v[a+1]=vec_mergel(v[a>>1],t[a>>1]);
v[a]=vec_mergeh(v[a>>1],t[a>>1]);
}
}
#endif
}
void ff_snow_vertical_compose97i_altivec(DWTELEM *b0, DWTELEM *b1, DWTELEM *b2, DWTELEM *b3, DWTELEM *b4, DWTELEM *b5, int width)
{
int i, w4 = width/4;
vector signed int *v0, *v1,*v2,*v3,*v4,*v5;
vector signed int t1, t2;
v0=(vector signed int *)b0;
v1=(vector signed int *)b1;
v2=(vector signed int *)b2;
v3=(vector signed int *)b3;
v4=(vector signed int *)b4;
v5=(vector signed int *)b5;
for (i=0; i< w4;i++)
{
#if 0
b4[i] -= (3*(b3[i] + b5[i])+4)>>3;
b3[i] -= ((b2[i] + b4[i]));
b2[i] += ((b1[i] + b3[i])+4*b2[i]+8)>>4;
b1[i] += (3*(b0[i] + b2[i]))>>1;
#else
t1 = vec_add(v3[i], v5[i]);
t2 = vec_add(t1, vec_add(t1,t1));
t1 = vec_add(t2, vec_splat_s32(4));
v4[i] = vec_sub(v4[i], vec_sra(t1,vec_splat_u32(3)));
v3[i] = vec_sub(v3[i], vec_add(v2[i], v4[i]));
t1 = vec_add(vec_splat_s32(8), vec_add(v1[i], v3[i]));
t2 = vec_sl(v2[i], vec_splat_u32(2));
v2[i] = vec_add(v2[i], vec_sra(vec_add(t1,t2),vec_splat_u32(4)));
t1 = vec_add(v0[i], v2[i]);
t2 = vec_add(t1, vec_add(t1,t1));
v1[i] = vec_add(v1[i], vec_sra(t2,vec_splat_u32(1)));
#endif
}
for(i*=4; i < width; i++)
{
b4[i] -= (W_DM*(b3[i] + b5[i])+W_DO)>>W_DS;
b3[i] -= (W_CM*(b2[i] + b4[i])+W_CO)>>W_CS;
b2[i] += (W_BM*(b1[i] + b3[i])+4*b2[i]+W_BO)>>W_BS;
b1[i] += (W_AM*(b0[i] + b2[i])+W_AO)>>W_AS;
}
}
#define LOAD_BLOCKS \
tmp1 = vec_ld(0, &block[3][y*src_stride]);\
align = vec_lvsl(0, &block[3][y*src_stride]);\
tmp2 = vec_ld(15, &block[3][y*src_stride]);\
\
b3 = vec_perm(tmp1,tmp2,align);\
\
tmp1 = vec_ld(0, &block[2][y*src_stride]);\
align = vec_lvsl(0, &block[2][y*src_stride]);\
tmp2 = vec_ld(15, &block[2][y*src_stride]);\
\
b2 = vec_perm(tmp1,tmp2,align);\
\
tmp1 = vec_ld(0, &block[1][y*src_stride]);\
align = vec_lvsl(0, &block[1][y*src_stride]);\
tmp2 = vec_ld(15, &block[1][y*src_stride]);\
\
b1 = vec_perm(tmp1,tmp2,align);\
\
tmp1 = vec_ld(0, &block[0][y*src_stride]);\
align = vec_lvsl(0, &block[0][y*src_stride]);\
tmp2 = vec_ld(15, &block[0][y*src_stride]);\
\
b0 = vec_perm(tmp1,tmp2,align);
#define LOAD_OBMCS \
tmp1 = vec_ld(0, obmc1);\
align = vec_lvsl(0, obmc1);\
tmp2 = vec_ld(15, obmc1);\
\
ob1 = vec_perm(tmp1,tmp2,align);\
\
tmp1 = vec_ld(0, obmc2);\
align = vec_lvsl(0, obmc2);\
tmp2 = vec_ld(15, obmc2);\
\
ob2 = vec_perm(tmp1,tmp2,align);\
\
tmp1 = vec_ld(0, obmc3);\
align = vec_lvsl(0, obmc3);\
tmp2 = vec_ld(15, obmc3);\
\
ob3 = vec_perm(tmp1,tmp2,align);\
\
tmp1 = vec_ld(0, obmc4);\
align = vec_lvsl(0, obmc4);\
tmp2 = vec_ld(15, obmc4);\
\
ob4 = vec_perm(tmp1,tmp2,align);
/* interleave logic
* h1 <- [ a,b,a,b, a,b,a,b, a,b,a,b, a,b,a,b ]
* h2 <- [ c,d,c,d, c,d,c,d, c,d,c,d, c,d,c,d ]
* h <- [ a,b,c,d, a,b,c,d, a,b,c,d, a,b,c,d ]
*/
#define STEPS_0_1\
h1 = (vector unsigned short)\
vec_mergeh(ob1, ob2);\
\
h2 = (vector unsigned short)\
vec_mergeh(ob3, ob4);\
\
ih = (vector unsigned char)\
vec_mergeh(h1,h2);\
\
l1 = (vector unsigned short) vec_mergeh(b3, b2);\
\
ih1 = (vector unsigned char) vec_mergel(h1, h2);\
\
l2 = (vector unsigned short) vec_mergeh(b1, b0);\
\
il = (vector unsigned char) vec_mergeh(l1, l2);\
\
v[0] = (vector signed int) vec_msum(ih, il, vec_splat_u32(0));\
\
il1 = (vector unsigned char) vec_mergel(l1, l2);\
\
v[1] = (vector signed int) vec_msum(ih1, il1, vec_splat_u32(0));
#define FINAL_STEP_SCALAR\
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];\
}
static void inner_add_yblock_bw_8_obmc_16_altivec(uint8_t *obmc,
const int obmc_stride,
uint8_t * * block, int b_w,
int b_h, int src_x, int src_y,
int src_stride, slice_buffer * sb,
int add, uint8_t * dst8)
{
int y, x;
DWTELEM * dst;
vector unsigned short h1, h2, l1, l2;
vector unsigned char ih, il, ih1, il1, tmp1, tmp2, align;
vector unsigned char b0,b1,b2,b3;
vector unsigned char ob1,ob2,ob3,ob4;
DECLARE_ALIGNED_16(int, vbuf[16]);
vector signed int *v = (vector signed int *)vbuf, *d;
for(y=0; y<b_h; y++){
//FIXME ugly misuse of obmc_stride
uint8_t *obmc1= obmc + y*obmc_stride;
uint8_t *obmc2= obmc1+ (obmc_stride>>1);
uint8_t *obmc3= obmc1+ obmc_stride*(obmc_stride>>1);
uint8_t *obmc4= obmc3+ (obmc_stride>>1);
dst = slice_buffer_get_line(sb, src_y + y);
d = (vector signed int *)(dst + src_x);
//FIXME i could avoid some loads!
// load blocks
LOAD_BLOCKS
// load obmcs
LOAD_OBMCS
// steps 0 1
STEPS_0_1
FINAL_STEP_SCALAR
}
}
#define STEPS_2_3\
h1 = (vector unsigned short) vec_mergel(ob1, ob2);\
\
h2 = (vector unsigned short) vec_mergel(ob3, ob4);\
\
ih = (vector unsigned char) vec_mergeh(h1,h2);\
\
l1 = (vector unsigned short) vec_mergel(b3, b2);\
\
l2 = (vector unsigned short) vec_mergel(b1, b0);\
\
ih1 = (vector unsigned char) vec_mergel(h1,h2);\
\
il = (vector unsigned char) vec_mergeh(l1,l2);\
\
v[2] = (vector signed int) vec_msum(ih, il, vec_splat_u32(0));\
\
il1 = (vector unsigned char) vec_mergel(l1,l2);\
\
v[3] = (vector signed int) vec_msum(ih1, il1, vec_splat_u32(0));
static void inner_add_yblock_bw_16_obmc_32_altivec(uint8_t *obmc,
const int obmc_stride,
uint8_t * * block, int b_w,
int b_h, int src_x, int src_y,
int src_stride, slice_buffer * sb,
int add, uint8_t * dst8)
{
int y, x;
DWTELEM * dst;
vector unsigned short h1, h2, l1, l2;
vector unsigned char ih, il, ih1, il1, tmp1, tmp2, align;
vector unsigned char b0,b1,b2,b3;
vector unsigned char ob1,ob2,ob3,ob4;
DECLARE_ALIGNED_16(int, vbuf[b_w]);
vector signed int *v = (vector signed int *)vbuf, *d;
for(y=0; y<b_h; y++){
//FIXME ugly misuse of obmc_stride
uint8_t *obmc1= obmc + y*obmc_stride;
uint8_t *obmc2= obmc1+ (obmc_stride>>1);
uint8_t *obmc3= obmc1+ obmc_stride*(obmc_stride>>1);
uint8_t *obmc4= obmc3+ (obmc_stride>>1);
dst = slice_buffer_get_line(sb, src_y + y);
d = (vector signed int *)(dst + src_x);
// load blocks
LOAD_BLOCKS
// load obmcs
LOAD_OBMCS
// steps 0 1 2 3
STEPS_0_1
STEPS_2_3
FINAL_STEP_SCALAR
}
}
#define FINAL_STEP_VEC \
\
if(add)\
{\
for(x=0; x<b_w/4; x++)\
{\
v[x] = vec_add(v[x], d[x]);\
v[x] = vec_sra(vec_add(v[x],\
vec_sl( vec_splat_s32(1),\
vec_splat_u32(7))),\
vec_splat_u32(8));\
\
mask = (vector bool int) vec_sl((vector signed int)\
vec_cmpeq(v[x],v[x]),vec_splat_u32(8));\
mask = (vector bool int) vec_and(v[x],vec_nor(mask,mask));\
\
mask = (vector bool int)\
vec_cmpeq((vector signed int)mask,\
(vector signed int)vec_splat_u32(0));\
\
vs = vec_sra(v[x],vec_splat_u32(8));\
vs = vec_sra(v[x],vec_splat_u32(8));\
vs = vec_sra(v[x],vec_splat_u32(15));\
\
vs = vec_nor(vs,vs);\
\
v[x]= vec_sel(v[x],vs,mask);\
}\
\
for(x=0; x<b_w; x++)\
dst8[x + y*src_stride] = vbuf[x];\
\
}\
else\
for(x=0; x<b_w/4; x++)\
d[x] = vec_sub(d[x], v[x]);
static void inner_add_yblock_a_bw_8_obmc_16_altivec(uint8_t *obmc,
const int obmc_stride,
uint8_t * * block, int b_w,
int b_h, int src_x, int src_y,
int src_stride, slice_buffer * sb,
int add, uint8_t * dst8)
{
int y, x;
DWTELEM * dst;
vector bool int mask;
vector signed int vs;
vector unsigned short h1, h2, l1, l2;
vector unsigned char ih, il, ih1, il1, tmp1, tmp2, align;
vector unsigned char b0,b1,b2,b3;
vector unsigned char ob1,ob2,ob3,ob4;
DECLARE_ALIGNED_16(int, vbuf[16]);
vector signed int *v = (vector signed int *)vbuf, *d;
for(y=0; y<b_h; y++){
//FIXME ugly misuse of obmc_stride
uint8_t *obmc1= obmc + y*obmc_stride;
uint8_t *obmc2= obmc1+ (obmc_stride>>1);
uint8_t *obmc3= obmc1+ obmc_stride*(obmc_stride>>1);
uint8_t *obmc4= obmc3+ (obmc_stride>>1);
dst = slice_buffer_get_line(sb, src_y + y);
d = (vector signed int *)(dst + src_x);
//FIXME i could avoid some loads!
// load blocks
LOAD_BLOCKS
// load obmcs
LOAD_OBMCS
// steps 0 1
STEPS_0_1
FINAL_STEP_VEC
}
}
static void inner_add_yblock_a_bw_16_obmc_32_altivec(uint8_t *obmc,
const int obmc_stride,
uint8_t * * block, int b_w,
int b_h, int src_x, int src_y,
int src_stride, slice_buffer * sb,
int add, uint8_t * dst8)
{
int y, x;
DWTELEM * dst;
vector bool int mask;
vector signed int vs;
vector unsigned short h1, h2, l1, l2;
vector unsigned char ih, il, ih1, il1, tmp1, tmp2, align;
vector unsigned char b0,b1,b2,b3;
vector unsigned char ob1,ob2,ob3,ob4;
DECLARE_ALIGNED_16(int, vbuf[b_w]);
vector signed int *v = (vector signed int *)vbuf, *d;
for(y=0; y<b_h; y++){
//FIXME ugly misuse of obmc_stride
uint8_t *obmc1= obmc + y*obmc_stride;
uint8_t *obmc2= obmc1+ (obmc_stride>>1);
uint8_t *obmc3= obmc1+ obmc_stride*(obmc_stride>>1);
uint8_t *obmc4= obmc3+ (obmc_stride>>1);
dst = slice_buffer_get_line(sb, src_y + y);
d = (vector signed int *)(dst + src_x);
// load blocks
LOAD_BLOCKS
// load obmcs
LOAD_OBMCS
// steps 0 1 2 3
STEPS_0_1
STEPS_2_3
FINAL_STEP_VEC
}
}
void ff_snow_inner_add_yblock_altivec(uint8_t *obmc, const int obmc_stride,
uint8_t * * block, int b_w, int b_h,
int src_x, int src_y, int src_stride,
slice_buffer * sb, int add,
uint8_t * dst8)
{
if (src_x&15) {
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)
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);
else
ff_snow_inner_add_yblock(obmc, obmc_stride, block, b_w, b_h, src_x,
src_y, src_stride, sb, add, dst8);
} else {
if (b_w == 16)
inner_add_yblock_a_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)
inner_add_yblock_a_bw_8_obmc_16_altivec(obmc, obmc_stride, block,
b_w, b_h, src_x, src_y,
src_stride, sb, add, dst8);
else
ff_snow_inner_add_yblock(obmc, obmc_stride, block, b_w, b_h, src_x,
src_y, src_stride, sb, add, dst8);
}
}
void snow_init_altivec(DSPContext* c, AVCodecContext *avctx)
{
#if 0
c->horizontal_compose97i = ff_snow_horizontal_compose97i_altivec;
c->vertical_compose97i = ff_snow_vertical_compose97i_altivec;
c->inner_add_yblock = ff_snow_inner_add_yblock_altivec;
#endif
}
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