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;*************************************************************************;** INTEL Corporation Proprietary Information;**;** This listing is supplied under the terms of a license;** agreement with INTEL Corporation and may not be copied;** nor disclosed except in accordance with the terms of;** that agreement.;**;** Copyright (c) 1995 Intel Corporation.;** All Rights Reserved.;**;*************************************************************************;//;// $Header: S:\h26x\src\dec\cx512242.asv;//;// $Log: S:\h26x\src\dec\cx512242.asv $;// ;// Rev 1.8 20 Mar 1996 10:57:22 bnickers;// Fix numerous bugs.;// ;// Rev 1.7 19 Mar 1996 11:50:22 bnickers;// Fix error regarding commitment of pages to stack.;// ;// Rev 1.6 18 Mar 1996 09:58:36 bnickers;// Make color convertors non-destructive.;// ;// Rev 1.5 05 Feb 1996 13:35:36 BNICKERS;// Fix RGB16 color flash problem, by allowing different RGB16 formats at oce.;// ;// Rev 1.4 22 Dec 1995 15:42:18 KMILLS;// added new copyright notice;// ;// Rev 1.3 30 Oct 1995 17:15:32 BNICKERS;// Fix color shift in RGB24 color convertors.;// ;// Rev 1.2 26 Oct 1995 17:49:36 CZHU;// Fix a whole bunch of bugs.;// ;// Rev 1.1 26 Oct 1995 09:46:22 BNICKERS;// Reduce the number of blanks in the "proc" statement because the assembler;// sometimes has problems with statements longer than 512 characters long.;// ;// Rev 1.0 25 Oct 1995 17:59:28 BNICKERS;// Initial revision.;// ;////////////////////////////////////////////////////////////////////////////;; +---------- Color convertor.; |+--------- For both H261 and H263.; ||+-------- Version for the Pentium(r) Microprocessor.; |||++------ Convert from YUV12.; |||||++---- Convert to RGB24.; |||||||+--- Zoom by two.; ||||||||; cx512242 -- This function performs YUV12-to-RGB24 zoom-by-two color conversion; for H26x. It is tuned for best performance on the Pentium(r); Microprocessor. It handles the format in which the low order; byte is B, the second byte is G, and the high order byte is R.;; The YUV12 input is planar, 8 bits per pel. The Y plane may have; a pitch of up to 768. It may have a width less than or equal; to the pitch. It must be DWORD aligned, and preferably QWORD; aligned. Pitch and Width must be a multiple of four. For best; performance, Pitch should not be 4 more than a multiple of 32.; Height may be any amount, but must be a multiple of two. The U; and V planes may have a different pitch than the Y plane, subject; to the same limitations.;; The color convertor is non-destructive; the input Y, U, and V; planes will not be clobbered.
OPTION PROLOGUE:NoneOPTION EPILOGUE:ReturnAndRelieveEpilogueMacro
include locals.incinclude ccinst.incinclude decconst.inc
.xlistinclude memmodel.inc.list.DATA
; any data would go here
.CODE
ASSUME cs : FLATASSUME ds : FLATASSUME es : FLATASSUME fs : FLATASSUME gs : FLATASSUME ss : FLAT
; void FAR ASM_CALLTYPE YUV12ToRGB24ZoomBy2 (U8 * YPlane,; U8 * VPlane,; U8 * UPlane,; UN FrameWidth,; UN FrameHeight,; UN YPitch,; UN VPitch,; UN AspectAdjustmentCount,; U8 FAR * ColorConvertedFrame,; U32 DCIOffset,; U32 CCOffsetToLine0,; IN CCOPitch,; IN CCType);; CCOffsetToLine0 is relative to ColorConvertedFrame.;
PUBLIC YUV12ToRGB24ZoomBy2
; due to the need for the ebp reg, these parameter declarations aren't used,; they are here so the assembler knows how many bytes to relieve from the stack
YUV12ToRGB24ZoomBy2 proc DIST LANG AYPlane: DWORD,AVPlane: DWORD,AUPlane: DWORD,AFrameWidth: DWORD,AFrameHeight: DWORD,AYPitch: DWORD,AVPitch: DWORD,AAspectAdjustmentCnt: DWORD,AColorConvertedFrame: DWORD,ADCIOffset: DWORD,ACCOffsetToLine0: DWORD,ACCOPitch: DWORD,ACCType: DWORD
LocalFrameSize = 64+768*8+32RegisterStorageSize = 16
; Arguments:
YPlane_arg = RegisterStorageSize + 4VPlane_arg = RegisterStorageSize + 8UPlane_arg = RegisterStorageSize + 12FrameWidth_arg = RegisterStorageSize + 16FrameHeight = RegisterStorageSize + 20YPitch_arg = RegisterStorageSize + 24ChromaPitch_arg = RegisterStorageSize + 28AspectAdjustmentCount_arg = RegisterStorageSize + 32ColorConvertedFrame = RegisterStorageSize + 36DCIOffset = RegisterStorageSize + 40CCOffsetToLine0 = RegisterStorageSize + 44CCOPitch = RegisterStorageSize + 48CCType_arg = RegisterStorageSize + 52EndOfArgList = RegisterStorageSize + 56
; Locals (on local stack frame)
CCOCursor EQU [esp+ 0]CCOSkipDistance EQU [esp+ 4]ChromaLineLen EQU [esp+ 8]YSkipDistance EQU [esp+12]YLimit EQU [esp+16]YCursor EQU [esp+20]VCursor EQU [esp+24]DistanceFromVToU EQU [esp+28]EndOfChromaLine EQU [esp+32]AspectCount EQU [esp+36]ChromaPitch EQU [esp+40]AspectAdjustmentCount EQU [esp+44]LineParity EQU [esp+48]LumaPitch EQU [esp+52]FrameWidth EQU [esp+56]StashESP EQU [esp+60]
ChromaContribution EQU [esp+64]B0R0G0B0 EQU [esp+72]G1B1R0G0 EQU [esp+76]R1G1B1R1 EQU [esp+80]B2R2G2B2 EQU [esp+84]G3B3R2G2 EQU [esp+88]R3G3B3R3 EQU [esp+92]
push esi push edi push ebp push ebx
mov edi,esp sub esp,4096 mov eax,[esp] sub esp,LocalFrameSize-4096 and esp,0FFFFF000H mov eax,[esp] and esp,0FFFFE000H mov eax,[esp] sub esp,1000H mov eax,[esp] sub esp,1000H mov eax,[esp] add esp,2000H mov eax,[edi+YPitch_arg] mov ebx,[edi+ChromaPitch_arg] mov ecx,[edi+AspectAdjustmentCount_arg] mov edx,[edi+FrameWidth_arg] mov LumaPitch,eax mov ChromaPitch,ebx mov AspectAdjustmentCount,ecx mov AspectCount,ecx mov FrameWidth,edx mov ebx,[edi+VPlane_arg] mov ecx,[edi+UPlane_arg] mov eax,[edi+YPlane_arg] sub ecx,ebx mov DistanceFromVToU,ecx mov VCursor,ebx mov YCursor,eax mov eax,[edi+ColorConvertedFrame] add eax,[edi+DCIOffset] add eax,[edi+CCOffsetToLine0] mov CCOCursor,eax mov StashESP,edi
mov edx,[edi+FrameHeight] mov ecx,LumaPitch imul edx,ecx mov ebx,FrameWidth mov eax,[edi+CCOPitch] sub ecx,ebx mov esi,YCursor ; Fetch cursor over luma plane. lea ebp,[ebx+ebx*4] add edx,esi add ebp,ebx mov YSkipDistance,ecx sub eax,ebp mov YLimit,edx shr ebx,1 mov CCOSkipDistance,eax mov ChromaLineLen,ebx mov ecx,AspectAdjustmentCount mov esi,VCursor mov AspectCount,ecx
; Register Usage:;; edi -- Y Line cursor. Chroma contribs go in lines above current Y line.; esi -- Chroma Line cursor.; ebp -- Y Pitch; edx -- Distance from V pel to U pel.; ecx -- V contribution to RGB; sum of U and V contributions.; ebx -- U contribution to RGB.; eax -- Alternately a U and a V pel.
PrepareChromaLine:
mov edi,ChromaLineLen xor eax,eax mov edx,DistanceFromVToU mov al,[esi] ; Fetch V. add edi,esi ; Compute EOL address. xor ecx,ecx mov ebp,PD V24Contrib[eax*8] ; ebp[ 0: 7] -- Zero ; ; ebp[ 8:15] -- V contrib to G. ; ; ebp[16:23] -- V contrib to R. ; ; ebp[24:31] -- Zero. mov cl,[esi+edx] ; Fetch U. mov EndOfChromaLine,edi xor ebx,ebx ; Keep pairing happy. mov ebx,PD U24Contrib[ecx*8] ; ebx[ 0: 7] -- U contrib to B. ; ; ebx[ 8:15] -- U contrib to G. ; ; ebx[16:23] -- Zero. mov cl,[esi+edx+1] ; Fetch next U. lea edi,ChromaContribution add ebp,ebx ; Chroma contributions to RGB.
NextChromaPel:
mov ebx,PD U24Contrib[ecx*8] ; See above. mov al,[esi+1] ; Fetch V. mov [edi],ebp ; Store contribs to use for even chroma pel. mov cl,[esi+edx+2] ; Fetch next U. mov ebp,PD V24Contrib[eax*8] ; See above. add edi,32 add ebp,ebx ; Chroma contributions to RGB. mov al,[esi+2] ; Fetch V. mov [edi-28],ebp ; Store contribs to use for odd chroma pel. mov ebx,PD U24Contrib[ecx*8] ; See above. mov ebp,PD V24Contrib[eax*8] ; See above. mov cl,[esi+edx+3] ; Fetch next U. add ebp,ebx ; Chroma contributions to RGB. add esi,2 ; Inc Chroma cursor. cmp esi,EndOfChromaLine jne NextChromaPel
xor eax,eax mov esi,YCursor mov [edi+4],eax ; Store EOL indicator. mov LineParity,eax
DoLine1: ; EAX EBX ECX EDX EBP xor ebx,ebx ; -- -- -- -- >-- -- -- -- ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? xor ecx,ecx ; -- -- -- -- -- -- -- -- >-- -- -- -- ?? ?? ?? ?? ?? ?? ?? ?? mov ebp,ChromaContribution ; Fetch preprocessed chroma contribs. -- -- -- -- -- -- -- -- -- -- -- -- ?? ?? ?? ?? AA AA AA AA xor edx,edx ; -- -- -- -- -- -- -- -- -- -- -- -- >-- -- -- -- AA AA AA AA mov cl,[esi] ; Fetch Y0. -- -- -- -- -- -- -- -- m>-- -- -- y0 -- -- -- -- AA AA AA AA mov bl,ChromaContribution+3 ; Fetch U contrib to B value. -- -- -- -- m>-- -- -- uB01 -- -- -- y0 -- -- -- -- AA AA AA AA mov dl,ChromaContribution+2 ; Fetch UV contrib to G value. -- -- -- -- -- -- -- uB01 -- -- -- y0 m>-- -- -- uvG01 AA AA AA AA and ebp,0000001FFH ; Extract V contrib to R. -- -- -- -- -- -- -- uB01 -- -- -- y0 -- -- -- uvG01 >-- -- -1 AA mov edi,CCOCursor ; -- -- -- -- -- -- -- uB01 -- -- -- y0 -- -- -- uvG01 -- -- -1 AA sub esp,6144 ; -- -- -- -- -- -- -- uB01 -- -- -- y0 -- -- -- uvG01 -- -- -1 AA xor eax,eax ; >-- -- -- -- -- -- -- uB01 -- -- -- y0 -- -- -- uvG01 -- -- -1 AA
; Register Usage:;; esi -- Cursor over a line of the Y Plane.; edi -- Cursor over the color conv output.; ebp -- V contribution to R field of RGB value.; edx -- UV contrib to G field; U contrib to B field of RGB value.; ecx -- Y value (i.e. Y contribution to R, G, and B);; ebx -- Construction of one and a third pels of RGB24.; eax -- Construction of one and a third pels of RGB24.
Next4YPelsLine0: ; EAX EBX ECX EDX EBP mov al,PB B24Value[ecx+ebx*2] ; Fetch Pel0 B m>-- -- -- B0 <-- -- -- uB01 <-- -- -- y0 -- -- -- uvG01 -- -- -1 AA mov bh,PB R24Value[ecx+ebp*1] ; Fetch Pel0 R. -- -- -- B0 m>-- -- R0 uB01 <-- -- -- y0 -- -- -- uvG01 <-- -- -1 AA mov bl,PB G24Value[ecx+edx] ; Fetch Pel0 G. -- -- -- B0 m>-- -- R0 G0 <-- -- -- y0 <-- -- -- uvG01 -- -- -1 AA mov cl,[esi+1] ; Fetch Y1. -- -- -- B0 -- -- R0 G0 m>-- -- -- y1 -- -- -- uvG01 -- -- -1 AA shl ebx,8 ; -- -- -- B0 >-- R0 G0 -- -- -- -- y1 -- -- -- uvG01 -- -- -1 AA
shl ebx,8 ; -- -- -- B0 >R0 G0 -- -- -- -- -- y1 -- -- -- uvG01 -- -- -1 AA mov bh,PB G24Value[ecx+edx] ; Fetch Pel1 G. -- -- -- B0 m>R0 G0 G1 -- <-- -- -- y1 <-- -- -- uvG01 -- -- -1 AA mov dl,ChromaContribution+6144+3 ; Refetch U contrib to B value. -- -- -- B0 R0 G0 G1 -- -- -- -- y1 m>-- -- -- uB01 -- -- -1 AA mov bl,PB B24Value[ecx+edx*2] ; Fetch Pel1 B. -- -- -- B0 m>R0 G0 G1 B1 <-- -- -- y1 <-- -- -- uB01 -- -- -1 AA add al,bl ; Fetch Pel1 B. r>-- -- -- B0+B1 R0 G0 G1 B1 -- -- -- y1 -- -- -- uB01 -- -- -1 AA shr al,1 ; Fetch Pel1 B. >-- -- -- B01 R0 G0 G1 B1 -- -- -- y1 -- -- -- uB01 -- -- -1 AA
or eax,ebx ; r>-- R0 G0 B0 <-- R0 G0 -- -- -- -- y1 -- -- -- uvG01 -- -- -1 AA mov bh,PB G24Value[ecx+edx] ; Fetch Pel1 G. -- R0 G0 B0 m>-- R0 G1 -- <-- -- -- y1 <-- -- -- uvG01 -- -- -1 AA mov dl,ChromaContribution+6144+3 ; Refetch U contrib to B value. -- R0 G0 B0 -- R0 G1 -- -- -- -- y1 m>-- -- -- uB01 -- -- -1 AA mov bl,PB B24Value[ecx+edx*2] ; Fetch Pel1 B. -- R0 G0 B0 m>-- R0 G1 B1 <-- -- -- y1 <-- -- -- uB01 -- -- -1 AA rol ebx,16 ; Make room for R1 -- R0 G0 B0 >G1 B1 -- R0 -- -- -- y1 -- -- -- uB01 -- -- -1 AA mov dl,bl ; Save R0. -- R0 G0 B0 G1 B1 -- R0 -- -- -- y1 >-- -- -- R0 -- -- -1 AA mov bl,PB R24Value[ecx+ebp*1] ; Fetch Pel1 R1. -- R0 G0 B0 >G1 B1 -- R1 <-- -- -- y1 -- -- -- R0 <-- -- -1 AA add dl,bl ; Add R1 to R0. -- R0 G0 B0 G1 B1 -- R1 -- -- -- y1 >-- -- -- R0+R1 -- -- -1 AA shr edx,1 ; Compute (R1+R0)/2. -- R0 G0 B0 G1 B1 -- R1 -- -- -- y1 >-- -- -- R01 -- -- -1 AA mov bh,dl ; Save R01. -- R0 G0 B0 >G1 B1 R01R1 -- -- -- y1 <-- -- -- R01 -- -- -1 AA rol ebx,16 ; Reorder components. -- R0 G0 B0 >R01R1 G1 B1 -- -- -- y1 -- -- -- R01 -- -- -1 AA mov dl,al ; Copy B0. <-- R0 G0 B0 R01R1 G1 B1 -- -- -- y1 r>-- -- -- B0 -- -- -1 AA mov cl,bh ; Copy G1. -- R0 G0 B0 <R01R1 G1 B1 r>-- -- -- G1 -- -- -- B0 -- -- -1 AA add dl,bl ; Add B1 to B0. -- R0 G0 B0 <R01R1 G1 B1 -- -- -- G1 r>-- -- -- B0+B1 -- -- -1 AA add cl,ah ; Add G0 to G1. <-- R0 G0 B0 R01R1 G1 B1 r>-- -- -- G1+G0 -- -- -- B0+B1 -- -- -1 AA shr edx,1 ; Compute (B1+B0)/2. -- R0 G0 B0 R01R1 G1 B1 -- -- -- G1+G0 >-- -- -- B01 -- -- -1 AA shr ecx,1 ; Compute (G1+G0)/2. -- R0 G0 B0 R01R1 G1 B1 >-- -- -- G01 -- -- -- B01 -- -- -1 AA shl ecx,24 ; Reorder nibbles. -- R0 G0 B0 R01R1 G1 B1 -- -- -- G01 >B01-- -- -- -- -- -1 AA or eax,edx ; Reorder nibbles. r>B01R0 G0 B0 R01R1 G1 B1 -- -- -- G01 <B01-- -- -- -- -- -1 AA mov Ze [edi],eax ; Save B01R0G0B0. m<B01R0 G0 B0 R01R1 G1 B1 -- -- -- G01 B01-- -- -- -- -- -1 AA mov edx,ebx ; B01R0 G0 B0 <R01R1 G1 B1 -- -- -- G01 >R01R1 G1 B1 -- -- -1 AA rol edx,16 ; B01R0 G0 B0 R01R1 G1 B1 -- -- -- G01 >G1 B1 R01R1 -- -- -1 AA mov dl,cl ; B01R0 G0 B0 R01R1 G1 B1 <-- -- -- G01 >R1 B1 R01G01 -- -- -1 AA mov Ze [edi+4],edx ; Save R1B1R01G01. B01R0 G0 B0 R01R1 G1 B1 -- -- -- G01 m<R1 B1 R01G01 -- -- -1 AA
mov ebp,ChromaContribution+6144+4 ; Fetch preprocessed chroma contribs. B0 R0 G0 B0 G1 B1 R0 R1 -- -- -- y1 -- -- -- uB01 BB BB BB BB mov bh,bl ; Copy Pel1 R. B0 R0 G0 B0 >G1 B1 R1 R1 -- -- -- y1 -- -- -- uB01 BB BB BB BB mov cl,[esi+2] ; Fetch Y2. B0 R0 G0 B0 G1 B1 R1 R1 m>-- -- -- y2 -- -- -- uB01 BB BB BB BB ror ebx,8 ; Third output: B0 R0 G0 B0 >R1 G1 B1 R1 -- -- -- y2 -- -- -- uB01 BB BB BB BB and ebp,0000001FFH ; Extract V contrib to R. B0 R0 G0 B0 >R1 G1 B1 R1 -- -- -- y2 -- -- -- uB01 -- -- -1 BB mov dl,ChromaContribution+6144+6 ; Fetch UV contrib to G value. B0 R0 G0 B0 R1 G1 B1 R1 -- -- -- y2 >-- -- -- uvG23 -- -- -1 BB xor eax,eax ; >-- -- -- -- R1 G1 B1 R1 -- -- -- y2 -- -- -- uvG23 -- -- -1 BB mov al,ChromaContribution+6144+7 ; Fetch U contrib to B value. >-- -- -- uB23 R1 G1 B1 R1 -- -- -- y2 -- -- -- uvG23 -- -- -1 BB mov R1G1B1R1+6144,ebx ; Stash for saving to second line. -- -- -- uB23 m<R1 G1 B1 R1 -- -- -- y2 -- -- -- uvG23 -- -- -1 BB mov Ze [edi+8],ebx ; Save R1G1B1R1. -- -- -- uB23 m<R1 G1 B1 R1 -- -- -- y2 -- -- -- uvG23 -- -- -1 BB xor ebx,ebx ; -- -- -- uB23 >-- -- -- -- -- -- -- y2 -- -- -- uvG23 -- -- -1 BB mov bh,PB B24Value[ecx+eax*2] ; Fetch Pel2 B. <-- -- -- uB23 >-- -- B2 -- <-- -- -- y2 -- -- -- uvG23 -- -- -1 BB mov ah,PB R24Value[ecx+ebp*1] ; Fetch Pel2 R. >-- -- R2 uB23 -- -- B2 -- <-- -- -- y2 -- -- -- uvG23 <-- -- -1 BB mov al,PB G24Value[ecx+edx] ; Fetch Pel2 G. >-- -- R2 G2 -- -- B2 -- <-- -- -- y2 <-- -- -- uvG23 -- -- -1 BB mov cl,[esi+3] ; Fetch Y3. -- -- R2 G2 -- -- B2 -- >-- -- -- y3 -- -- -- uvG23 -- -- -1 BB shl eax,16 ; R2 G2 -- -- >R2 G2 -- -- -- -- B2 -- -- -- -- y3 -- -- -- uvG23 -- -- -1 BB mov bl,bh ; Copy Pel2 B. -- -- B2 B2 R2 G2 -- -- >-- -- B2 B2 -- -- -- y3 -- -- -- uvG23 -- -- -1 BB or ebx,eax ; R2 G2 B2 B2 R2 G2 -- -- >R2 G2 B2 B2 -- -- -- y3 -- -- -- uvG23 -- -- -1 BB mov ah,PB G24Value[ecx+edx] ; Fetch Pel1 G. R2 G2 G3 -- >R2 G2 G3 -- R2 G2 B2 B2 <-- -- -- y3 <-- -- -- uvG23 -- -- -1 BB ror ebx,8 ; Fourth output: B2 R2 G2 B2 R2 G2 G3 -- >B2 R2 G2 B2 -- -- -- y3 -- -- -- uvG23 -- -- -1 BB mov dl,ChromaContribution+6144+7 ; Refetch U contrib to B value. R2 G2 G3 -- B2 R2 G2 B2 -- -- -- y3 >-- -- -- uB23 -- -- -1 BB mov Ze [edi+12],ebx ; Save B2R2G2B2. R2 G2 G3 -- m<B2 R2 G2 B2 -- -- -- y3 -- -- -- uB23 -- -- -1 BB mov al,PB B24Value[ecx+edx*2] ; Fetch Pel3 B. R2 G2 G3 B3 m>R2 G2 G3 B3 B2 R2 G2 B2 <-- -- -- y3 <-- -- -- uB23 -- -- -1 BB rol eax,16 ; Fifth output: G3 B3 R2 G2 >G3 B3 R2 G2 B2 R2 G2 B2 -- -- -- y3 -- -- -- uB23 -- -- -1 BB mov B2R2G2B2+6144,ebx ; Stash for saving to second line. G3 B3 R2 G2 m<B2 R2 G2 B2 -- -- -- y3 -- -- -- uB23 -- -- -1 BB mov Ze [edi+16],eax ; Save G3B3R2G2. m<G3 B3 R2 G2 B2 R2 G2 B2 -- -- -- y3 -- -- -- uB23 -- -- -1 BB mov G3B3R2G2+6144,eax ; Stash for saving to second line. m<G3 B3 R2 G2 B2 R2 G2 B2 -- -- -- y3 -- -- -- uB23 -- -- -1 BB mov al,PB R24Value[ecx+ebp*1] ; Fetch Pel3 R. G3 B3 -- R3 m>G3 B3 R2 R3 B2 R2 G2 B2 <-- -- -- y3 -- -- -- uB23 <-- -- -1 BB mov ebp,ChromaContribution+6144+32; Fetch preprocessed chroma contribs. G3 B3 R2 R3 B2 R2 G2 B2 -- -- -- y3 -- -- -- uB23 m>CC CC CC CC mov ah,al ; Copy Pel3 R. G3 B3 R3 R3 >G3 B3 R3 R3 B2 R2 G2 B2 -- -- -- y3 -- -- -- uB23 CC CC CC CC mov cl,[esi+4] ; Fetch Y4. G3 B3 R3 R3 B2 R2 G2 B2 >-- -- -- y4 -- -- -- uB23 CC CC CC CC ror eax,8 ; Sixth output: R3 G3 B3 R3 >R3 G3 B3 R3 B2 R2 G2 B2 -- -- -- y4 -- -- -- uB23 CC CC CC CC xor ebx,ebx ; R3 G3 B3 R3 >-- -- -- -- -- -- -- y4 -- -- -- uB23 CC CC CC CC mov dl,ChromaContribution+6144+34 ; Fetch UV contrib to G value. R3 G3 B3 R3 -- -- -- -- -- -- -- y4 m>-- -- -- uvG45 CC CC CC CC and ebp,0000001FFH ; Extract U contrib to B. R3 G3 B3 R3 -- -- -- -- -- -- -- y4 -- -- -- uvG45 >-- -- -1 CC mov bl,ChromaContribution+6144+35 ; Fetch U contrib to B value. R3 G3 B3 R3 >-- -- -- uB45 -- -- -- y4 -- -- -- uvG45 -- -- -1 CC lea esi,[esi+4] ; Advance input cursor. R3 G3 B3 R3 -- -- -- uB45 -- -- -- y4 -- -- -- uvG45 -- -- -1 CC mov Ze [edi+20],eax ; Save R3G3B3R3. m<R3 G3 B3 R3 -- -- -- uB45 -- -- -- y4 -- -- -- uvG45 -- -- -1 CC mov R3G3B3R3+6144,eax ; Stash for saving to second line. m<R3 G3 B3 R3 -- -- -- uB45 -- -- -- y4 -- -- -- uvG45 -- -- -1 CC mov eax,ebx ; r>-- -- -- uB45 <-- -- -- uB45 -- -- -- y4 -- -- -- uvG45 -- -- -1 C lea esp,[esp+32] lea edi,[edi+24] ; Advance output cursor. jne Next4YPelsLine0
and esp,0FFFFE000H add esp,02000H mov ebx,CCOSkipDistance mov ebp,AspectCount add edi,ebx sub ebp,2 ; If count is non-zero, we keep the line. mov AspectCount,ebp lea ecx,B0R0G0B0 mov eax,FrameWidth jg Keep2ndLineOfLine0
add ebp,AspectAdjustmentCount mov AspectCount,ebp jmp Skip2ndLineOfLine0
Keep2ndLineOfLine0:Keep2ndLineOfLine0_Loop:
mov ebp,[ecx] sub eax,4 mov Ze PD [edi],ebp mov ebp,[ecx+4] mov Ze PD [edi+4],ebp mov ebp,[ecx+8] mov Ze PD [edi+8],ebp mov ebp,[ecx+12] mov Ze PD [edi+12],ebp mov ebp,[ecx+16] mov Ze PD [edi+16],ebp mov ebp,[ecx+20] mov Ze PD [edi+20],ebp lea ecx,[ecx+32] lea edi,[edi+24] jne Keep2ndLineOfLine0_Loop
add edi,ebx
Skip2ndLineOfLine0:
mov bl,LineParity add esi,YSkipDistance xor bl,1 mov CCOCursor,edi mov YCursor,esi mov LineParity,bl jne DoLine1
mov eax,esi mov esi,VCursor ; Inc VPlane cursor to next line. mov ebp,ChromaPitch mov ebx,YLimit ; Done with last line? add esi,ebp cmp eax,ebx mov VCursor,esi jb PrepareChromaLine
Done:
mov esp,StashESP pop ebx pop ebp pop edi pop esi rturn
YUV12ToRGB24ZoomBy2 endp
END
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