?? transfrm.c
字號(hào):
psubw mm4, PACKED_128 ;// convert mm4 from unsigned to signed by substracting 128
packsswb mm0, mm1 ;// pack mm0 and mm1 to get only 8 signed bytes into mm0
packsswb mm3, mm4 ;// pack mm3 and mm4 to get only 8 signed bytes into mm3
paddb mm0, PACKED_128B ;// reverse the effect of convertion to signed
paddb mm3, PACKED_128B ;// reverse the effect of convertion to signed
add ebx, ecx ;// ebx += 2 * lx
movq [edi], mm0 ;// store mm0
movq [edi+edx], mm3 ;// store mm3
movq mm0, [esi+96] ;// mm0 = 4 words into esi[96..103]
movq mm1, [esi+104] ;// mm1 = 4 words into esi[104..111]
movq mm2, [ebx] ;// mm2 = 4 words into ebx[0..7]
movq mm3, [esi+112] ;// mm3 = 4 words into esi[112..119]
movq mm4, [esi+120] ;// mm4 = 4 words into esi[120..127]
movq mm5, [ebx+edx] ;// mm5 = 4 words into (ebx + edx)[0..7]
add edi, ecx ;// edi += 2 * lx
movq mm6, mm2
movq mm7, mm5
punpcklbw mm2, PACKED_0 ;// unpack the lower 4 bytes into mm2
punpckhbw mm6, PACKED_0 ;// unpack the upper 4 bytes into mm6
punpcklbw mm5, PACKED_0 ;// unpack the lower 4 bytes into mm5
punpckhbw mm7, PACKED_0 ;// unpack the upper 4 bytes into mm7
paddw mm0, mm2 ;// mm0 += mm2
paddw mm1, mm6 ;// mm1 += mm6
paddw mm3, mm5 ;// mm3 += mm5
paddw mm4, mm7 ;// mm4 += mm7
psubw mm0, PACKED_128 ;// convert mm0 from unsigned to signed by substracting 128
psubw mm1, PACKED_128 ;// convert mm1 from unsigned to signed by substracting 128
psubw mm3, PACKED_128 ;// convert mm3 from unsigned to signed by substracting 128
psubw mm4, PACKED_128 ;// convert mm4 from unsigned to signed by substracting 128
packsswb mm0, mm1 ;// pack mm0 and mm1 to get only 8 signed bytes into mm0
packsswb mm3, mm4 ;// pack mm3 and mm4 to get only 8 signed bytes into mm3
paddb mm0, PACKED_128B ;// reverse the effect of convertion to signed
paddb mm3, PACKED_128B ;// reverse the effect of convertion to signed
movq [edi], mm0 ;// store mm0
movq [edi+edx], mm3 ;// store mm3
emms ;// empty MMX state
}
}
else
{ for (j=0; j<8; j++) { for (i=0; i<8; i++)
cur[i] = clp[blk[i] + pred[i]];
blk+= 8; cur+= lx; pred+= lx; }
}
}/* 從塊數(shù)據(jù)中減去預(yù)測(cè)信息*/static void sub_pred(pred,cur,lx,blk)unsigned char *pred, *cur;int lx;short *blk;{
int i, j;
if(cpu_MMX)
{
_asm
{
mov esi, cur ;// esi = cur
mov ebx, pred ;// ebx = pred
mov edi, blk ;// edi = blk
mov edx, lx ;// edx = lx
lea ecx, [2*edx] ;// ecx = 2 * lx
movq mm0, [esi] ;// mm0 = 8 bytes into esi[0..7]
movq mm2, [ebx] ;// mm2 = 8 bytes into ebx[0..7]
movq mm4, [esi+edx] ;// mm4 = 8 bytes into (esi + edx)[0..7]
movq mm6, [ebx+edx] ;// mm6 = 8 bytes into (ebx + edx)[0..7]
movq mm1, mm0
movq mm3, mm2
movq mm5, mm4
movq mm7, mm6
punpcklbw mm0, PACKED_0 ;// unpack the lower 4 bytes into mm0
punpckhbw mm1, PACKED_0 ;// unpack the upper 4 bytes into mm1
punpcklbw mm2, PACKED_0 ;// unpack the lower 4 bytes into mm2
punpckhbw mm3, PACKED_0 ;// unpack the upper 4 bytes into mm3
punpcklbw mm4, PACKED_0 ;// unpack the lower 4 bytes into mm4
punpckhbw mm5, PACKED_0 ;// unpack the upper 4 bytes into mm5
punpcklbw mm6, PACKED_0 ;// unpack the lower 4 bytes into mm6
punpckhbw mm7, PACKED_0 ;// unpack the upper 4 bytes into mm7
psubw mm0, mm2 ;// mm0 -= mm2
psubw mm1, mm3 ;// mm1 -= mm3
psubw mm4, mm6 ;// mm4 -= mm6
psubw mm5, mm7 ;// mm5 -= mm7
add esi, ecx ;// esi += 2 * lx
add ebx, ecx ;// ebx += 2 * lx
movq [edi], mm0 ;// store mm0 into edi[0..7]
movq [edi+8], mm1 ;// store mm1 into edi[8..15]
movq [edi+16], mm4 ;// store mm4 into edi[16..23]
movq [edi+24], mm5 ;// store mm5 into edi[24..31]
movq mm0, [esi] ;// mm0 = 8 bytes into esi[0..7]
movq mm2, [ebx] ;// mm2 = 8 bytes into ebx[0..7]
movq mm4, [esi+edx] ;// mm4 = 8 bytes into (esi + edx)[0..7]
movq mm6, [ebx+edx] ;// mm6 = 8 bytes into (ebx + edx)[0..7]
movq mm1, mm0
movq mm3, mm2
movq mm5, mm4
movq mm7, mm6
punpcklbw mm0, PACKED_0 ;// unpack the lower 4 bytes into mm0
punpckhbw mm1, PACKED_0 ;// unpack the upper 4 bytes into mm1
punpcklbw mm2, PACKED_0 ;// unpack the lower 4 bytes into mm2
punpckhbw mm3, PACKED_0 ;// unpack the upper 4 bytes into mm3
punpcklbw mm4, PACKED_0 ;// unpack the lower 4 bytes into mm4
punpckhbw mm5, PACKED_0 ;// unpack the upper 4 bytes into mm5
punpcklbw mm6, PACKED_0 ;// unpack the lower 4 bytes into mm6
punpckhbw mm7, PACKED_0 ;// unpack the upper 4 bytes into mm7
psubw mm0, mm2 ;// mm0 -= mm2
psubw mm1, mm3 ;// mm1 -= mm3
psubw mm4, mm6 ;// mm4 -= mm6
psubw mm5, mm7 ;// mm5 -= mm7
add esi, ecx ;// esi += 2 * lx
add ebx, ecx ;// ebx += 2 * lx
movq [edi+32], mm0 ;// store mm0 into edi[32..39]
movq [edi+40], mm1 ;// store mm1 into edi[40..47]
movq [edi+48], mm4 ;// store mm4 into edi[48..55]
movq [edi+56], mm5 ;// store mm5 into edi[56..63]
movq mm0, [esi] ;// mm0 = 8 bytes into esi[0..7]
movq mm2, [ebx] ;// mm2 = 8 bytes into ebx[0..7]
movq mm4, [esi+edx] ;// mm4 = 8 bytes into (esi + edx)[0..7]
movq mm6, [ebx+edx] ;// mm6 = 8 bytes into (ebx + edx)[0..7]
movq mm1, mm0
movq mm3, mm2
movq mm5, mm4
movq mm7, mm6
punpcklbw mm0, PACKED_0 ;// unpack the lower 4 bytes into mm0
punpckhbw mm1, PACKED_0 ;// unpack the upper 4 bytes into mm1
punpcklbw mm2, PACKED_0 ;// unpack the lower 4 bytes into mm2
punpckhbw mm3, PACKED_0 ;// unpack the upper 4 bytes into mm3
punpcklbw mm4, PACKED_0 ;// unpack the lower 4 bytes into mm4
punpckhbw mm5, PACKED_0 ;// unpack the upper 4 bytes into mm5
punpcklbw mm6, PACKED_0 ;// unpack the lower 4 bytes into mm6
punpckhbw mm7, PACKED_0 ;// unpack the upper 4 bytes into mm7
psubw mm0, mm2 ;// mm0 -= mm2
psubw mm1, mm3 ;// mm1 -= mm3
psubw mm4, mm6 ;// mm4 -= mm6
psubw mm5, mm7 ;// mm5 -= mm7
add esi, ecx ;// esi += 2 * lx
add ebx, ecx ;// ebx += 2 * lx
movq [edi+64], mm0 ;// store mm0 into edi[64..71]
movq [edi+72], mm1 ;// store mm1 into edi[72..79]
movq [edi+80], mm4 ;// store mm4 into edi[80..87]
movq [edi+88], mm5 ;// store mm5 into edi[88..95]
movq mm0, [esi] ;// mm0 = 8 bytes into esi[0..7]
movq mm2, [ebx] ;// mm2 = 8 bytes into ebx[0..7]
movq mm4, [esi+edx] ;// mm4 = 8 bytes into (esi + edx)[0..7]
movq mm6, [ebx+edx] ;// mm6 = 8 bytes into (ebx + edx)[0..7]
movq mm1, mm0
movq mm3, mm2
movq mm5, mm4
movq mm7, mm6
punpcklbw mm0, PACKED_0 ;// unpack the lower 4 bytes into mm0
punpckhbw mm1, PACKED_0 ;// unpack the upper 4 bytes into mm1
punpcklbw mm2, PACKED_0 ;// unpack the lower 4 bytes into mm2
punpckhbw mm3, PACKED_0 ;// unpack the upper 4 bytes into mm3
punpcklbw mm4, PACKED_0 ;// unpack the lower 4 bytes into mm4
punpckhbw mm5, PACKED_0 ;// unpack the upper 4 bytes into mm5
punpcklbw mm6, PACKED_0 ;// unpack the lower 4 bytes into mm6
punpckhbw mm7, PACKED_0 ;// unpack the upper 4 bytes into mm7
psubw mm0, mm2 ;// mm0 -= mm2
psubw mm1, mm3 ;// mm1 -= mm3
psubw mm4, mm6 ;// mm4 -= mm6
psubw mm5, mm7 ;// mm5 -= mm7
movq [edi+96], mm0 ;// store mm0 into edi[96..103]
movq [edi+104], mm1 ;// store mm1 into edi[104..111]
movq [edi+112], mm4 ;// store mm4 into edi[112..119]
movq [edi+120], mm5 ;// store mm5 into edi[120..127]
emms ;// empty MMX state
}
}
else
{
for (j=0; j<8; j++)
{
for (i=0; i<8; i++)
blk[i] = cur[i] - pred[i];
blk+= 8;
cur+= lx;
pred+= lx;
}
}
}/* * 選擇幀DCT或場(chǎng)DCT */void dct_type_estimation(pred,cur,mbi)unsigned char *pred,*cur;struct mbinfo *mbi;{ short blk0[128], blk1[128]; int i, j, i0, j0, k, offs, s0, s1, sq0, sq1, s01; double d, r;
k = 0; for (j0=0; j0<height2; j0+=16) for (i0=0; i0<width; i0+=16) { if (frame_pred_dct || pict_struct!=FRAME_PICTURE) mbi[k].dct_type = 0; else { for (j=0; j<8; j++) { offs = width*((j<<1)+j0) + i0; for (i=0; i<16; i++) { blk0[16*j+i] = cur[offs] - pred[offs]; blk1[16*j+i] = cur[offs+width] - pred[offs+width]; offs++; } } /* correlate fields */ s0=s1=sq0=sq1=s01=0; for (i=0; i<128; i++) { s0+= blk0[i]; sq0+= blk0[i]*blk0[i]; s1+= blk1[i]; sq1+= blk1[i]*blk1[i]; s01+= blk0[i]*blk1[i]; } d = (sq0-(s0*s0)/128.0)*(sq1-(s1*s1)/128.0); if (d>0.0) { r = (s01-(s0*s1)/128.0)/sqrt(d); if (r>0.5) mbi[k].dct_type = 0; /* frame DCT */ else mbi[k].dct_type = 1; /* field DCT */ } else mbi[k].dct_type = 1; /* field DCT */ } k++; }}?? 快捷鍵說(shuō)明
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