;405 412 586
;
;
bufer_size=1024*16+2
fichero=4
mcu_ptr=8
color_ptr=12
estado=16
color_c=17
nbits=color_c
idct=20
tmp_bits=24
actable=28
matriz_limit=32
sourcebits=36
sourcebits_index=40
sourcebits_limit=44
qt_ptrs=48
ht_dc_ptrs=64
ht_ac_ptrs=80
matrices=96
tmp_bufer=100
x_org=104
y_org=108
x_mcu=112
y_mcu=116
x_size=120
y_size=124
x_org2=128
y_org2=132
x_mcu2=136
y_mcu2=140
x_size2=144
y_size2=148
q_ptr=152
dc=164
position=204
draw_ptr=208
struct_size=212
jpeg_info: ;fichero en eax
;retorna ebp
xor ebp,ebp
pushad
mov ebp,esp
mov ecx,6
sub esp,ecx
mov edi,esp
call read
pop dx
cmp dx,0d8ffh
je .l1
mov esp,ebp
popad
ret
.l1: push eax
mov ecx,struct_size
call mallocz
mov [edi],ebp
mov ebp,edi
pop dword [ebp+fichero]
pop ax
pop cx
jmp .l3
.l2: mov ebx,[ebp+tmp_bufer]
add ebx,[ebx-4]
mov cx,[ebx-2]
mov ax,[ebx-4]
.l3: push .l2
xchg cl,ch
add cx,2
cmp ch,3
jnc .l4
cmp al,0ffh
jne eoi
cmp ah,0dbh
je dqt
cmp ah,0c4h
je dht
cmp ah,0c0h
je sof0
cmp ah,0dah
je sos
cmp ah,0c2h
je eoi
cmp ah,0c9h
je eoi
cmp ah,0d9h
je eoi
.l4: lea edx,[ecx-4]
xor ecx,ecx
mov eax,[ebp+fichero]
call skip
mov ecx,4
call READ
cmp ecx,[edi-4]
jne eoi
ret
eoi:
mov esp,[ebp]
; do not close file - this will be done by caller
and dword [ebp+fichero], 0
call jpeg_close
popad
xor ebp,ebp
ret
jpeg_close:
test ebp,ebp
jz .l2
pushad
mov eax,[ebp+fichero]
call close
mov edi,[ebp+sourcebits]
call free
lea esi,[ebp+qt_ptrs]
mov ecx,14
.l1: mov edi,[esi]
add esi,4
call free
loop .l1
mov edi,ebp
call free
popad
.l2: ret
dqt: call READ
mov esi,edi
lea eax,[edi+ecx]
push eax
.l1: xor eax,eax
lodsb
cmp al,4
jnc eoi
lea ebx,[ebp+qt_ptrs+eax*4]
test dword [ebx],-1
jnz eoi
mov ecx,64
xor eax,eax
sub esp,128
mov edi,esp
.l2: lodsb
stosw
loop .l2
mov ecx,256
call malloc
mov [ebx],edi
mov eax,esi
mov esi,esp
pushad
mov ebp,zigzag
fninit
mov cl,64
xor eax,eax
.l3: fild word[esi]
mov al,[ebp]
and al,-2
add ebp,2
add esi,2
mov ebx,eax
and ebx,28
fmul dword [ebx+k2]
mov ebx,eax
shr ebx,3
and ebx,4+8+16
fmul dword [ebx+k2]
fstp dword [edi+eax]
dec cl
jnz .l3
popad
mov esi,eax
add esp,128
mov eax,[esp]
sub eax,esi
jc eoi
cmp eax,4
ja .l1
jne eoi
pop eax
ret
sof0: call READ
cmp byte [edi],8
jne eoi ;precision
mov ax,[edi+1]
xchg al,ah
mov [ebp+y_size],ax
mov ax,[edi+3]
xchg al,ah
mov [ebp+x_size],ax
mov al,[edi+5] ;ncomponentes
mov cl,al
mov [ebp+color_c],al
mov edx,modes
dec al
jz .l1
dec al
dec al
jnz eoi
mov al,[edi+10]
mov ah,[edi+13]
cmp ax,1111h
jne eoi
mov al,[edi+7]
add edx,16
cmp al,11h
je .l1
add edx,16
cmp al,21h
je .l1
add edx,16
cmp al,22h
jne eoi
.l1: lea ebx,[ebp+q_ptr]
lea esi,[ebp+qt_ptrs]
mov [ebp+mcu_ptr],edx
.l2: movzx eax,byte [edi+8]
add edi,3
cmp al,4
jnc eoi
lea eax,[eax*4+esi]
mov [ebx],eax
add ebx,16
dec cl
jnz .l2
ret
READ: mov eax,[ebp+fichero]
mov edi,[ebp+tmp_bufer]
movzx ecx,cx
call mresize
mov [ebp+tmp_bufer],edi
jmp read
dht: call READ
mov esi,edi
lea eax,[edi+ecx]
push eax
.l1: lodsb
mov edi,esi
mov ebx,3+16
and bl,al
cmp bl,al
jne eoi
shr bl,2
and al,3
or bl,al
lea ebx,[ebp+ht_dc_ptrs+ebx*4]
test dword [ebx],-1
jnz eoi
mov cl,15
mov al,[edi]
.l2: inc edi ;calcular numero de codigos
add al,[edi]
jc eoi
dec cl
jnz .l2
movzx ecx,al
lea ecx,[ecx*4+2]
call malloc
mov [ebx],edi
call arbol_hf
mov eax,[esp]
sub eax,ebx
jc eoi
mov esi,ebx
cmp eax,4
ja .l1
jne eoi
pop eax
ret
arbol_hf: ;esi=ht edi=memoria para el arbol
;retorna en ebx el final de ht
;codigos: bits 0-3=nbits del siguiente numero
; bits 4-7=numero de zeros
; bits 8-14=longitud de este codigo o error si =127
; bit 15=codigo/puntero
push ebp
lea ebx,[edi-2]
add ebx,[ebx-2]
mov word [ebx],-1 ;codigo de error si encontrado
push ebx
push esi
lea ebx,[esi+16]
mov ebp,esp
xor ecx,ecx
push edi
push ecx
add edi,2
mov dx,1
add dh,[esi]
jz .l3
jmp .l2
.l1: push edi
push ecx
add edi,2
.l2: inc cl
cmp cl,dl
jc .l1
mov al,[ebx]
inc ebx
mov ah,128 ;marca de codigo
or ah,dl
cmp edi,[ebp+4]
jnc .l5
stosw
cmp esp,ebp
jnc .l5
pop ecx
pop esi
lea eax,[edi-2]
sub eax,esi
mov [esi],ax
dec dh
jnz .l2 ;ncodigos
mov esi,[ebp]
.l3: inc esi
inc dl
cmp dl,17
jnc .l4
add dh,[esi]
jz .l3
mov [ebp],esi
jmp .l2
.l4: lea esp,[ebp+8]
pop ebp
ret
.l5: mov ebp,[ebp+8]
jmp eoi
sos: sub ecx,4 ;a continuacion vienen los datos de la imagen
call READ
mov eax,[ebp+fichero]
call ftell
mov [ebp+position],edx
mov esi,edi
lea edi,[ebp+q_ptr]
lodsb ;numero de componentes
sub [ebp+color_c],al
jnz eoi
mov dh,al
.l1: mov ebx,[edi]
mov eax,[ebx]
stosd
lodsw
mov cl,ah
and eax,0f00h
and ecx,0f0h
shr eax,6
shr ecx,2
lea ebx,[ebp+ht_ac_ptrs+eax]
mov eax,[ebx]
lea ebx,[ebp+ht_dc_ptrs+ecx]
mov ecx,[ebx]
test eax,eax
jz eoi
test ecx,ecx
jz eoi
stosd
mov eax,ecx
stosd
add edi,4
dec dh
jnz .l1
mov edx,[ebp+mcu_ptr]
cmp edx,modes
jne .l2
lea esi,[ebp+q_ptr]
lea edi,[ebp+q_ptr+32]
movsd
movsd
movsd
.l2:
mov esi,edx
push dword [esi]
pop dword [ebp+mcu_ptr]
push dword [esi+4]
pop dword[ebp+color_ptr]
push dword [esi+12]
pop dword [ebp+y_mcu]
push dword [esi+8]
pop dword [ebp+x_mcu]
mov ecx,64*18
call malloc
mov [ebp+matrices],edi
mov ecx,bufer_size
call malloc
mov [ebp+sourcebits],edi
mov esp,[ebp]
mov [esp+8],ebp
popad
ret
jpeg_display:
test ebp,ebp
jnz .inicio
ret
.inicio:
pushad
mov [ebp],esp
mov eax,[ebp+fichero]
mov edx,[ebp+position]
call lseek
mov edi,[ebp+sourcebits]
add edi,bufer_size
mov [ebp+sourcebits_index],edi
sub edi,2
mov [ebp+sourcebits_limit],edi
mov edi,[ebp+matrices]
mov [ebp+matriz_limit],edi
xor eax,eax
mov [esp+8],eax
mov [ebp+estado],eax
mov [ebp+tmp_bits],eax
mov [ebp+dc],eax
mov [ebp+dc+16],eax
mov [ebp+dc+32],eax
mov eax,[ebp+y_mcu]
mov ecx,[ebp+y_org]
sub ecx,eax
mov [ebp+y_org2],ecx
mov [ebp+y_mcu2],eax
push dword [ebp+y_size]
pop dword [ebp+y_size2]
.l3: push dword [ebp+x_org]
pop dword [ebp+x_org2]
push dword [ebp+x_mcu]
pop dword [ebp+x_mcu2]
push dword [ebp+x_size]
pop dword [ebp+x_size2]
mov eax,[ebp+y_mcu2]
add [ebp+y_org2],eax
sub [ebp+y_size2],eax
jnc .l4
add eax,[ebp+y_size2]
jnz .cont
mov [esp+8],ebp
popad
ret
.cont:
mov dword [ebp+y_size2],0
mov [ebp+y_mcu2],eax
.l4:
mov eax,[ebp+x_mcu2]
sub [ebp+x_size2],eax
jnc .l5
add eax,[ebp+x_size2]
jz .l3
mov dword [ebp+x_size2],0
mov [ebp+x_mcu2],eax
call dword [ebp+mcu_ptr]
mov eax,[ebp+x_mcu]
mov ecx,[ebp+x_mcu2]
mov edx,[ebp+y_mcu2]
call recortar
jmp .l6
.l5:
call dword [ebp+mcu_ptr]
mov ecx,[ebp+x_mcu2]
mov edx,[ebp+y_mcu2]
.l6:
mov eax,[ebp+x_org2]
mov ebx,[ebp+y_org2]
call dword [ebp+draw_ptr]
add [ebp+x_org2],ecx
mov ax,[ebp+estado]
test al,15
jz .l4
cmp ah,8
jnc .l4
xor edx,edx
mov [ebp+tmp_bits],edx
mov [ebp+dc],edx
mov [ebp+dc+16],edx
mov [ebp+dc+32],edx
add dword [ebp+sourcebits_index],2
and word [ebp+estado],0c0h
test al,32
jz .l4
jmp .l3
color100:
push edi
.l1: lodsw
mov dl,ah
mov ah,al
stosw
mov ah,dl
stosb
mov al,dl
stosb
stosw
dec cl
jnz .l1
pop edi
ret
color111:
push edi
.l1: lodsw
mov bx,[esi+62]
mov dx,[esi+126]
xchg ah,bh
xchg ah,dl
xchg ah,bl
stosw
mov ax,bx
stosw
mov ax,dx
stosw
dec cl
jnz .l1
pop edi
mov ecx,64*3
jmp ybr_bgr
color411:
push ebp
push edi
lea ebp,[esi+ecx*8]
.l1: push ecx
mov ax,[esi]
mov cx,[ebp]
mov dx,[ebp+64]
add ebp,2
xchg ch,dl
mov bx,ax
mov ah,cl
mov bl,ch
mov [edi],ax
mov [edi+2],bx
mov [edi+4],cx
mov ax,[esi+8]
mov bh,ah
mov ah,cl
mov [edi+48],ax
mov [edi+48+2],bx
mov [edi+48+4],cx
mov ax,[esi+2]
mov bx,ax
mov ah,dl
mov bl,dh
mov [edi+6],ax
mov [edi+2+6],bx
mov [edi+4+6],dx
mov ax,[esi+8+2]
mov bh,ah
mov ah,dl
mov [edi+48+6],ax
mov [edi+48+2+6],bx
mov [edi+48+4+6],dx
pop ecx
add edi,12
dec ecx
add esi,4
test cl,1
jnz .l1
add esi,64-8
test cl,2
jnz .l1
sub esi,128-16
add edi,48
test cl,15
jnz .l1
add esi,64
test cl,cl
jnz .l1
pop edi
pop ebp
mov ecx,64*4*3
jmp ybr_bgr
color211:
push ebp
push edi
lea ebp,[esi+ecx*4]
.l1: push ecx
mov ax,[esi]
mov cx,[ebp]
mov dx,[ebp+64]
add ebp,2
xchg ch,dl
mov bx,ax
mov ah,cl
mov bl,ch
mov [edi],ax
mov [edi+2],bx
mov [edi+4],cx
mov ax,[esi+2]
mov bx,ax
mov ah,dl
mov bl,dh
mov [edi+6],ax
mov [edi+2+6],bx
mov [edi+4+6],dx
pop ecx
add edi,12
dec cl
add esi,4
test cl,1
jnz .l1
add esi,64-8
test cl,2
jnz .l1
sub esi,128-8
test cl,cl
jnz .l1
pop edi
pop ebp
mov ecx,64*3*2
jmp ybr_bgr
mcu411: lea ebx,[ebp+q_ptr]
call hufdecode
lea ebx,[ebp+q_ptr]
call hufdecode
mcu211: lea ebx,[ebp+q_ptr]
call hufdecode
mcu111: lea ebx,[ebp+q_ptr]
call hufdecode
lea ebx,[ebp+q_ptr+16]
call hufdecode
mcu100: lea ebx,[ebp+q_ptr+32]
call hufdecode
mov esi,[ebp+matrices]
mov dword [ebp+matriz_limit],esi
mov ecx,32
lea edi,[esi+64*6]
jmp dword [ebp+color_ptr]
cargar_bits: ;edx=bits,cl=nbits,
;bp=data struct
;cr: cl,edx,eax,si
;ncr bx,bp,di,ch
mov esi,[ebp+sourcebits_index]
cmp esi,[ebp+sourcebits_limit]
jnc .l6
movzx eax,byte [esi]
inc esi
add cl,8
cmp al,-1
je .l2
mov ah,al
lodsb
add cl,8
cmp al,-1
je .l2
.l1: ror eax,cl
or edx,eax
mov [ebp+sourcebits_index],esi
ret
.l2: lodsb
test al,al
jnz .l3
mov al,-1
call .l1
cmp cl,16
jc cargar_bits
ret
.l3: sub esi,2
sub cl,8
sub al,0d0h
cmp al,8
jc .l4
sub al,9
mov al,63
jz .l4
mov al,127
.l4: inc al
or [ebp+estado],al
movzx eax,ah
jmp .l1
.l5: mov [ebp+sourcebits_limit],edi
mov word [edi],0d9ffh
popad
jmp cargar_bits
.l6: ;read file
pushad
mov ecx,bufer_size-2
mov edx,[ebp+sourcebits_limit]
mov edi,[ebp+sourcebits]
mov ax,[edx]
sub edx,edi
stosw
sub esi,edx
mov [ebp+sourcebits_index],esi
cmp edx,ecx
jne .l5
mov eax,[ebp+fichero]
call read
lea ecx,[edi+ecx-2]
mov [ebp+sourcebits_limit],ecx
popad
jmp cargar_bits
hufdecode: ;si->dctable [bp+20]->actable di->outbufer edx->bits cl->bits en edx
;[bp+24]->sourcebits
;[bp+22]=outbufer+128
;[bx] q ptr para aa&n
;[bx+2] a ptr
;[bx+4] d ptr
;[bx+8] dc componente
fninit
push dword [ebx]
mov cl,[ebp+nbits]
mov edx,[ebp+tmp_bits]
cmp cl,16
jnc .l1
call cargar_bits
.l1: mov eax,[ebx+4]
mov esi,[ebx+8]
mov [ebp+actable],eax
movzx eax,word [esi]
add esi,2
.l2: add edx,edx
jnc .l3
add esi,eax
.l3: lodsw
test ax,ax
jns .l2
;codigo encontrado
and ax,7f0fh
mov edi,[ebp+matriz_limit] ;arrays
sub cl,ah
jns .l4
fldz
.error:
xor ecx,ecx
or byte [ebp+estado],32
jmp .l12
.l4: cmp cl,al
jnc .l5
push eax
call cargar_bits
pop eax
.l5: sub cl,al
mov ch,cl
mov cl,al
mov eax,edx
shl edx,cl
sar eax,17
xor ax,8000h
xor cl,15
sar ax,cl
mov cl,ch
mov ch,2
add ax,8000h ;incrementar si negativo
adc ax,8000h
add [ebx+12],ax
fild word [ebx+12]
push ecx
mov ecx,64
xor eax,eax
add [ebp+matriz_limit],ecx
rep stosd
pop ecx
sub edi,64*4
mov ebx,[esp]
fmul dword [ebx]
.l6: cmp cl,16
jnc .l7
call cargar_bits
.l7: mov esi,[ebp+actable]
movzx eax,word[esi]
add esi,2
.l8: add edx,edx
jnc .l9
add esi,eax
.l9: lodsw
test ax,ax
jns .l8
;codigo encontrado
and ah,127
xor ebx,ebx
sub cl,ah
js .error
or bl,al
jz .l12
and al,0f0h
shr al,3
add ch,al
js .error
and bl,0fh
jz .l11
cmp cl,bl
jnc .l10
call cargar_bits
.l10: sub cl,bl
xchg bl,cl
mov eax,edx
shl edx,cl
sar eax,17
xor cl,15
xor ax,8000h
sar ax,cl
add ax,8000h ;incrementar si negativo
adc ax,8000h
mov cl,bl
mov bl,ch
mov [ebp+tmp_bits],ax
mov ax,[ebx+zigzag]
mov ebx,[esp]
fild word [ebp+tmp_bits]
or [ebp+idct],ax
and eax,11111100b
fmul dword [ebx+eax]
fstp dword [edi+eax]
.l11: add ch,2
jns .l6
.l12: mov [ebp+nbits],cl
mov [ebp+tmp_bits],edx
xor ebx,ebx
add esp,4
xchg ebx,[ebp+idct]
cmp ch,2
je idctf1
fstp dword [edi]
test bh,0feh
jnz idctf3
idctf2a: test bh,1
mov esi,edi
jz .l1
test bl,1
jnz idctf3
push idctf2b
jmp idctf3b
.l1: call idctf3a
mov cl,4
call limit
mov eax,[edi-8]
mov edx,[edi-4]
mov cl,7
.l2: mov [edi],eax
mov [edi+4],edx
add edi,8
dec cl
jnz .l2
ret
idctf1: fistp word[edi+64]
mov ax,128
add ax,[edi+64]
jz .l2
test ah,ah
jz .l1
mov al,-1
js .l2
.l1: mov ah,al
stosw
stosw
mov eax,[edi-4]
mov ecx,15
rep stosd
.l2: ret
idctf3: mov bl,8
mov esi,edi
.l1: rcr bh,1
jc .l3
mov eax,[esi]
test eax,eax
jz .l4
mov cl,7
.l2: add esi,32
mov [esi],eax
dec cl
jnz .l2
sub esi,32*7-4
dec bl
jnz .l1
jmp .l5
.l3: call idctf3b
.l4: add esi,4
dec bl
jnz .l1
.l5: mov esi,edi
mov cl,8
.l6: call idctf3a
add esi,32
add edi,16
dec cl
jnz .l6
sub edi,128
mov esi,edi
mov cl,32
limit: mov dx,[esi]
mov bx,[esi+2]
add esi,4
add dx,128
add bx,128
test dh,dh
mov ax,dx
jz .l1
mov al,0
js .l1
mov al,-1
.l1: test bh,bh
mov ah,bl
jz .l2
mov ah,0
js .l2
mov ah,-1
.l2: stosw
dec cl
jnz limit
ret
idctf2b:
mov dl,8
.l1: fld dword[esi]
add esi,32
mov ax,128
fistp word [edi]
add ax,[edi]
test ah,ah
jz .l2
mov al,0
js .l2
mov al,-1
.l2: mov ah,al
stosw
stosw
stosw
stosw
dec dl
jnz .l1
ret
idctf3a: ;si(d float),di(w int) ncr
fld dword[esi+1*4] ;f1 ;t21=f1+f7
fld st0
fld dword[esi+7*4] ;f7
fadd st2,st0
fsubp st1,st0 ;t22=f1-f7
fld dword[esi+5*4]
fld st0 ;f5 ;t23=f5+f3
fld dword[esi+3*4] ;f3
fadd st2,st0
fsubp st1,st0 ;t20=f5-f3
fld st0
fadd st0,st3 ;t25=(t20+t22)*k2
fmul dword[k+4] ;k2 ;t25,t20,t23,t22,t21
fld st4 ;t7=t21+t23
fadd st0,st3 ;t7,t25,t20,t23,t22,t21
fld dword[k+12] ;k4 ;t6=k4*t20+t25-t7
fmulp st3,st0
fsub st2,st0
fld st1
faddp st3,st0 ;t7,t25,t6,t23,t22,t21
fld st5 ;t5=(t21-t23)*k1-t6
fsub st0,st4
fmul dword[k] ;k1
fsub st0,st3
fstp st6 ;t7,t25,t6,t23,t22,t5
fstp st3 ;t25,t6,t7,t22,t5
fxch st3
fmul dword[k+8] ;k3 ;t4=k3*t22-t25+t5
fadd st0,st4 ;t22*k3+t5,t6,t7,t25,t5
fsubrp st3,st0 ;t6,t7,t4,t5
fld dword[esi] ;f0 ;t10=f0+f4
fst st5 ;f0,t4,t5,t6,t7,f0
fld dword[esi+4*4] ;f4
fsub st6,st0 ;t11=f0-f4
faddp st1,st0
fld st0 ;t10,t10,t6,t7,t4,t5,t11
fld dword[esi+2*4] ;f2 ;t13=f2+f6
fadd dword[esi+6*4] ;f6 ;t13,t10,t10,t6,t7,t4,t5,t11
fadd st2,st0 ;t13,t10,t0,t6,t7,t4,t5,t11 ;t0=t10+t13
fsubp st1,st0 ;t3,t0,t6,t7,t4,t5,t11 ;t3=t10-t13
fld st0 ;p3=t3-t4
fsub st0,st5
fistp word [edi+3*2] ;p3
fadd st0,st4 ;p4=t3+t4
fld dword[esi+2*4] ;f2
fstp st5
fistp word [edi+4*2] ;p4 ;t0,t6,t7,f2,t5,t11
fld st0 ;p0=t0+t7
fsub st0,st3
fistp word [edi+7*2] ;p7
fadd st0,st2 ;p7=t0-t7
fistp word [edi] ;p0 ;t6,t7,f2,t5,t11
fld st2 ;f2 ;f2,t6,t7,f2,t5,t11 ;t12=(f2-f6)*k1-t13
fld dword[esi+6*4] ;f6
fadd st4,st0 ;f6,f2,t6,t7,t13,t5,t11
fsubp st1,st0
fmul dword[k] ;k1
fsub st0,st3
fst st3 ;t12,t6,t7,t12,t5,t11
fadd st0,st5 ;t1=t11+t12
fst st2 ;t1,t6,t1,t12,t5,t11
fadd st0,st1 ;p1=t1+t6
fistp word [edi+2] ;p1 ;t6,t1,t12,t5,t11
fsubp st1,st0 ;p6=t1-t6
fistp word [edi+6*2] ;p6 ;t12,t5,t11
fsubp st2,st0 ;t2=t11-t12 ;t5,t2
fld st0
fadd st0,st2 ;p2=t2+t5
fistp word [edi+2*2] ;p2
fsubp st1,st0 ;p5=t2-t5 ;t5,t2
fistp word [edi+5*2]
ret ;p5
idctf3b: ;si ncr
fld dword[esi+1*32]
fld st0 ;f1 ;t21=f1+f7
fld dword[esi+7*32]
fadd st2,st0 ;f7
fsubp st1,st0 ;t22=f1-f7
fld dword[esi+5*32]
fld st0 ;f5 ;t23=f5+f3
fld dword[esi+3*32] ;f3
fadd st2,st0
fsubp st1,st0
fld st0 ;t20=f5-f3
fadd st0,st3 ;t25=(t20+t22)*k2
fmul dword[k+4] ;k2 ;t25,t20,t23,t22,t21
fld st4 ;t7=t21+t23
fadd st0,st3 ;t7,t25,t20,t23,t22,t21
fld dword[k+12] ;k4 ;t6=k4*t20+t25-t7
fmulp st3,st0
fsub st2,st0
fld st1
faddp st3,st0 ;t7,t25,t6,t23,t22,t21
fld st5 ;t5=(t21-t23)*k1-t6
fsub st0,st4
fmul dword[k] ;k1
fsub st0,st3
fstp st6 ;t7,t25,t6,t23,t22,t5
fstp st3
fxch st3 ;t25,t6,t7,t22,t5
fmul dword[k+8] ;k3 ;t4=k3*t22-t25+t5
fadd st0,st4 ;t22*k3+t5,t6,t7,t25,t5
fsubrp st3,st0 ;t6,t7,t4,t5
fld dword[esi] ;f0 ;t10=f0+f4
fst st5 ;f0,t4,t5,t6,t7,f0
fld dword[esi+4*32] ;f4
fsub st6,st0 ;t11=f0-f4
faddp st1,st0
fld st0 ;t10,t10,t6,t7,t4,t5,t11
fld dword[esi+2*32] ;f2 ;t13=f2+f6
fadd dword[esi+6*32] ;f6 ;t13,t10,t10,t6,t7,t4,t5,t11
fadd st2,st0 ;t13,t10,t0,t6,t7,t4,t5,t11 ;t0=t10+t13
fsubp st1,st0 ;t3,t0,t6,t7,t4,t5,t11 ;t3=t10-t13
fld st0 ;p3=t3-t4
fsub st0,st5
fstp dword[esi+3*32] ;p3
fadd st0,st4 ;p4=t3+t4
fld dword[esi+2*32] ;f2
fstp st5
fstp dword[esi+4*32] ;p4 ;t0,t6,t7,f2,t5,t11
fld st0
fsub st0,st3 ;p0=t0+t7
fstp dword[esi+7*32] ;p7
fadd st0,st2 ;p7=t0-t7
fstp dword[esi] ;p0 ;t6,t7,f2,t5,t11
fld st2 ;f2 ;f2,t6,t7,f2,t5,t11 ;t12=(f2-f6)*k1-t13
fld dword[esi+6*32] ;f6
fadd st4,st0 ;f6,f2,t6,t7,t13,t5,t11
fsubp st1,st0
fmul dword[k] ;k1
fsub st0,st3
fst st3 ;t12,t6,t7,t12,t5,t11
fadd st0,st5 ;t1=t11+t12
fst st2 ;t1,t6,t1,t12,t5,t11
fadd st0,st1 ;p1=t1+t6
fstp dword[esi+1*32] ;p1 ;t6,t1,t12,t5,t11
fsubp st1,st0 ;p6=t1-t6
fstp dword[esi+6*32] ;p6 ;t12,t5,t11
fsubp st2,st0
fld st0 ;t2=t11-t12 ;t5,t2
fadd st0,st2 ;p2=t2+t5
fstp dword[esi+2*32] ;p2
fsubp st1,st0 ;p5=t2-t5 ;t5,t2
fstp dword[esi+5*32]
ret ;p5
ybr_bgr: ;edi=bmp ecx=n_BYTES
;retorna edi+=ecx
pushad
mov esi,edi
add edi,ecx
push edi
mov edi,[colortabla]
.l1: lodsw
movzx ebx,ah
movzx ebp,al
movzx eax,al
movzx ecx,byte[esi]
lea ebx,[ebx*4+edi+1024]
lea ecx,[ecx*4+edi]
add eax,[ebx] ;cb ;solo se usan 16 bits
mov edx,[ebx+2] ;pero el codigo de 32 bits es mas rapido
mov ebx,[ecx] ;cr
add eax,[ecx+2]
add ebx,ebp ;b
add edx,ebp ;r
test ah,ah
jz .l2
mov al,0
js .l2
mov al,-1
.l2: test dh,dh
jz .l3
mov dl,0
js .l3
mov dl,-1
.l3: test bh,bh
mov dh,al
jz .l4
mov bl,0
js .l4
mov bl,-1
.l4: mov [esi-2],dx
mov [esi],bl
inc esi
cmp esi,[esp]
jc .l1
pop edi
popad
ret
recortar: ;edi=bufer eax=ancho en pixels (ecx,edx)tama¤o deseado
pushad
dec edx
jz .l2
lea ebx,[ecx*3]
lea eax,[eax*3]
lea esi,[edi+eax]
add edi,ebx
sub eax,ebx
.l1: mov ecx,ebx
call movedata
add esi,eax
dec edx
jnz .l1
.l2: popad
ret
;R = Y + 1.402 *(Cr-128)
;G = Y - 0.34414*(Cb-128) - 0.71414*(Cr-128)
;B = Y + 1.772 *(Cb-128)
colortabla: dd 0
colorprecalc: ;prepara la tabla para convertir ycb a rgb
mov ecx,1024*2
call malloc
mov [colortabla],edi
fninit
fld dword [.k+4]
fld dword [.k]
mov dl,0
call .l1
fld dword [.k+12]
fld dword[.k+8]
.l1: mov cx,-128
.l2: mov [edi],ecx
inc ecx
fild word[edi]
fld st0
fmul st0,st2
fistp word[edi]
fmul st0,st2
fistp word[edi+2]
add edi,4
inc dl
jnz .l2
ret
.k: dd 1.402,-0.71414,-0.34414,+1.772