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401 lines
15 KiB
401 lines
15 KiB
;*************************************************************************
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;** INTEL Corporation Proprietary Information
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;**
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;** This listing is supplied under the terms of a license
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;** agreement with INTEL Corporation and may not be copied
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;** nor disclosed except in accordance with the terms of
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;** that agreement.
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;**
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;** Copyright (c) 1995 Intel Corporation.
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;** All Rights Reserved.
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;**
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;*************************************************************************
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;//
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;// $Header: S:\h26x\src\dec\cx512241.asv
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;//
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;// $Log: S:\h26x\src\dec\cx512241.asv $
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;//
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;// Rev 1.7 27 Mar 1996 18:39:26 RMCKENZX
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;// Corrected bug in line parity which manifests on odd aspects.
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;//
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;// Rev 1.6 27 Mar 1996 14:41:46 RMCKENZX
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;// Changed YSkipDistance to use register ebp, not eax. When
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;// pitch-width was more than 255, the first 4 pels of odd lines
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;// would get erroneous values for blue, due to the presence of
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;// non-zero values in the high order bits of eax. Also cleaned a
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;// few comments.
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;//
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;// Rev 1.5 18 Mar 1996 09:58:46 bnickers
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;// Make color convertors non-destructive.
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;//
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;// Rev 1.4 05 Feb 1996 13:35:34 BNICKERS
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;// Fix RGB16 color flash problem, by allowing different RGB16 formats at oce.
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;//
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;// Rev 1.3 22 Dec 1995 15:40:52 KMILLS
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;//
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;// added new copyright notice
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;//
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;// Rev 1.2 30 Oct 1995 17:15:30 BNICKERS
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;// Fix color shift in RGB24 color convertors.
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;//
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;// Rev 1.1 26 Oct 1995 09:47:22 BNICKERS
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;// Reduce the number of blanks in the "proc" statement because the assembler
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;// sometimes has problems with statements longer than 512 characters long.
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;//
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;// Rev 1.0 25 Oct 1995 17:59:30 BNICKERS
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;// Initial revision.
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;//
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;////////////////////////////////////////////////////////////////////////////
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;
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; +---------- Color convertor.
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; |+--------- For both H261 and H263.
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; ||+-------- Version for the Pentium(r) Microprocessor.
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; |||++------ Convert from YUV12.
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; |||||++---- Convert to RGB24.
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; |||||||+--- Zoom by one, i.e. non-zoom.
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; ||||||||
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; cx512241 -- This function performs YUV12-to-RGB24 color conversion for H26x.
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; It is tuned for best performance on the Pentium(r) Microprocessor.
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; It handles the format in which the low order byte is B, the
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; second byte is G, and the high order byte is R.
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;
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; The YUV12 input is planar, 8 bits per pel. The Y plane may have
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; a pitch of up to 768. It may have a width less than or equal
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; to the pitch. It must be DWORD aligned, and preferably QWORD
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; aligned. Pitch and Width must be a multiple of four. For best
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; performance, Pitch should not be 4 more than a multiple of 32.
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; Height may be any amount, but must be a multiple of two. The U
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; and V planes may have a different pitch than the Y plane, subject
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; to the same limitations.
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;
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; The color convertor is non-destructive; the input Y, U, and V
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; planes will not be clobbered.
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OPTION PROLOGUE:None
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OPTION EPILOGUE:ReturnAndRelieveEpilogueMacro
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include locals.inc
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include ccinst.inc
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include decconst.inc
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.xlist
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include memmodel.inc
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.list
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.DATA
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; any data would go here
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.CODE
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ASSUME cs : FLAT
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ASSUME ds : FLAT
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ASSUME es : FLAT
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ASSUME fs : FLAT
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ASSUME gs : FLAT
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ASSUME ss : FLAT
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; void FAR ASM_CALLTYPE YUV12ToRGB24 (U8 * YPlane,
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; U8 * VPlane,
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; U8 * UPlane,
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; UN FrameWidth,
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; UN FrameHeight,
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; UN YPitch,
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; UN VPitch,
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; UN AspectAdjustmentCount,
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; U8 * ColorConvertedFrame,
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; U32 DCIOffset,
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; U32 CCOffsetToLine0,
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; IN CCOPitch,
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; IN CCType)
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;
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; CCOffsetToLine0 is relative to ColorConvertedFrame.
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;
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PUBLIC YUV12ToRGB24
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; due to the need for the ebp reg, these parameter declarations aren't used,
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; they are here so the assembler knows how many bytes to relieve from the stack,
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; or, rather, how to mangle the entry name.
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YUV12ToRGB24 proc DIST LANG AYPlane: DWORD,
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AVPlane: DWORD,
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AUPlane: DWORD,
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AFrameWidth: DWORD,
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AFrameHeight: DWORD,
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AYPitch: DWORD,
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AVPitch: DWORD,
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AAspectAdjustmentCnt: DWORD,
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AColorConvertedFrame: DWORD,
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ADCIOffset: DWORD,
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ACCOffsetToLine0: DWORD,
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ACCOPitch: DWORD,
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ACCType: DWORD
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LocalFrameSize = 60+768*4+16
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RegisterStorageSize = 16
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; Arguments:
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YPlane_arg = RegisterStorageSize + 4
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VPlane_arg = RegisterStorageSize + 8
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UPlane_arg = RegisterStorageSize + 12
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FrameWidth_arg = RegisterStorageSize + 16
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FrameHeight = RegisterStorageSize + 20
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YPitch = RegisterStorageSize + 24
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ChromaPitch_arg = RegisterStorageSize + 28
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AspectAdjustmentCount_arg = RegisterStorageSize + 32
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ColorConvertedFrame = RegisterStorageSize + 36
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DCIOffset = RegisterStorageSize + 40
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CCOffsetToLine0 = RegisterStorageSize + 44
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CCOPitch = RegisterStorageSize + 48
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CCType_arg = RegisterStorageSize + 52
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EndOfArgList = RegisterStorageSize + 56
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; Locals (on local stack frame)
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CCOCursor EQU [esp+ 0]
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CCOSkipDistance EQU [esp+ 4]
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ChromaLineLen EQU [esp+ 8]
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YSkipDistance EQU [esp+12]
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YLimit EQU [esp+16]
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YCursor EQU [esp+20]
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VCursor EQU [esp+24]
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DistanceFromVToU EQU [esp+28]
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EndOfChromaLine EQU [esp+32]
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AspectCount EQU [esp+36]
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FrameWidth EQU [esp+40]
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ChromaPitch EQU [esp+44]
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AspectAdjustmentCount EQU [esp+48]
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LineParity EQU [esp+52]
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StashESP EQU [esp+56]
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ChromaContribution EQU [esp+60]
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G2B2R1G1 EQU [esp+68]
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R3G3B3R2 EQU [esp+72]
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push esi
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push edi
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push ebp
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push ebx
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mov edi,esp
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sub esp,LocalFrameSize
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and esp,0FFFFF000H
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mov eax,[edi+FrameWidth_arg]
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mov ebx,[edi+ChromaPitch_arg]
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mov ecx,[edi+AspectAdjustmentCount_arg]
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mov FrameWidth,eax
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mov ChromaPitch,ebx
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mov AspectAdjustmentCount,ecx
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mov AspectCount,ecx
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mov ebx,[edi+VPlane_arg]
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mov ecx,[edi+UPlane_arg]
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mov eax,[edi+YPlane_arg]
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sub ecx,ebx
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mov DistanceFromVToU,ecx
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mov VCursor,ebx
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mov YCursor,eax
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mov eax,[edi+ColorConvertedFrame]
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add eax,[edi+DCIOffset]
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add eax,[edi+CCOffsetToLine0]
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mov CCOCursor,eax
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mov StashESP,edi
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mov edx,[edi+FrameHeight]
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mov ecx,[edi+YPitch]
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imul edx,ecx
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mov ebx,FrameWidth
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mov eax,[edi+CCOPitch]
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sub eax,ebx
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sub ecx,ebx
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sub eax,ebx
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mov YSkipDistance,ecx
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sub eax,ebx
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mov esi,YCursor ; Fetch cursor over luma plane.
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sar ebx,1
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mov CCOSkipDistance,eax
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add edx,esi
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mov ChromaLineLen,ebx
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mov YLimit,edx
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mov YCursor,esi
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mov esi,VCursor
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xor eax,eax
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mov LineParity,eax
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; Register Usage:
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;
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; edi -- Chroma contribution Line cursor.
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; esi -- Chroma Line cursor.
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; ebp -- V contribution to RGB; sum of U and V contributions.
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; edx -- Distance from V pel to U pel.
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; ecx -- A U pel.
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; ebx -- U contribution to RGB.
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; eax -- A V pel.
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PrepareChromaLine:
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mov edi,ChromaLineLen
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xor eax,eax
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mov edx,DistanceFromVToU
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mov al,[esi] ; Fetch V.
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add edi,esi ; Compute EOL address.
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xor ecx,ecx
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mov ebp,PD V24Contrib[eax*8] ; ebp[24:31] -- Zero (blue).
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; ; ebp[16:24] -- V contrib to G.
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; ; ebp[ 9:15] -- Zero (pad).
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; ; ebp[ 0: 8] -- V contrib to R.
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mov cl,[esi+edx] ; Fetch U.
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mov EndOfChromaLine,edi
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xor ebx,ebx ; Keep pairing happy.
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mov ebx,PD U24Contrib[ecx*8] ; ebx[24:31] -- U contrib to B.
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; ; ebx[16:24] -- U contrib to G.
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; ; ebx[ 9:15] -- Zero (pad).
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; ; ebx[ 0: 8] -- Zero (red).
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mov cl,[esi+edx+1] ; Fetch next U.
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lea edi,ChromaContribution
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add ebp,ebx ; Chroma contributions to RGB.
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NextChromaPel:
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mov ebx,PD U24Contrib[ecx*8] ; See above.
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mov al,[esi+1] ; Fetch V.
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mov [edi],ebp ; Store contribs to use for even chroma pel.
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mov cl,[esi+edx+2] ; Fetch next U.
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mov ebp,PD V24Contrib[eax*8] ; See above.
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add edi,16
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add ebp,ebx ; Chroma contributions to RGB.
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mov al,[esi+2] ; Fetch V.
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mov [edi-12],ebp ; Store contribs to use for odd chroma pel.
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mov ebx,PD U24Contrib[ecx*8] ; See above.
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mov ebp,PD V24Contrib[eax*8] ; See above.
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mov cl,[esi+edx+3] ; Fetch next U.
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add ebp,ebx ; Chroma contributions to RGB.
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add esi,2 ; Inc Chroma cursor.
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cmp esi,EndOfChromaLine
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jne NextChromaPel
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xor ecx,ecx
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xor ebx,ebx
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mov [edi+4],ecx ; Store EOL indicator.
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mov edx,AspectCount
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mov edi,CCOCursor
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dec edx ; If count is non-zero, we keep the line.
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mov esi,YCursor
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mov AspectCount,edx
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jne KeepLine0
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add esi,FrameWidth
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mov edx,AspectAdjustmentCount
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mov AspectCount,edx
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jmp SkipLine0
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KeepLine0:
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KeepLine1:
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; Register Usage:
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;
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; edi -- Cursor over the color converted output image.
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; esi -- Cursor over a line of the Y Plane.
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; ebp -- V contribution to R field of RGB value.
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; edx -- Construction of one and a third pels of RGB24.
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; cl -- Y value (i.e. Y contribution to R, G, and B);
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; bl,al -- UV contrib to G field of RGB val, U contrib to B field of RGB val.
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mov cl,[esi+3] ; Get Y03.
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mov bl,ChromaContribution+6 ; Get UV contribution to G value.
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mov ebp,ChromaContribution+4 ; Get V contribution to R value.
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sub esp,3072
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and ebp,01FFH ; Extract V contribution to R value.
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mov dl,PB G24Value[ecx+ebx] ; Get clamped G value for Pel03.
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DoNext4YPelsOfLine0:
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mov dh,PB R24Value[ecx+ebp*1] ; Get clamped R value for Pel03.
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mov al,ChromaContribution+3072+7 ; Get U contribution to B value.
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shl edx,16 ; Position R and G value for Pel03.
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mov bl,[esi+2] ; Get Y02.
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mov dh,PB B24Value[ecx+eax*2] ; Get clamped B value for Pel03.
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mov cl,ChromaContribution+3072+6 ; Reload UV contribution to G value.
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mov dl,PB R24Value[ebx+ebp*1] ; Get clamped R value for Pel02.
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mov ebp,ChromaContribution+3072 ; Get V contribution to R value.
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mov R3G3B3R2+3072,edx ; Stash 1.33 pels.
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mov dl,PB B24Value[ebx+eax*2] ; Get clamped B value for Pel02.
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mov dh,PB G24Value[ebx+ecx] ; Get clamped G value for Pel02.
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mov cl,[esi+1] ; Get Y01.
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mov bl,ChromaContribution+3072+2 ; Get UV contribution to G value.
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and ebp,01FFH ; Extract V contribution to R value.
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shl edx,16 ; Position G and B values for Pel02.
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mov al,ChromaContribution+3072+3 ; Get U contribution to B value.
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mov dl,PB G24Value[ecx+ebx] ; Get clamped G value for Pel01.
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mov bl,[esi] ; Get Y00.
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mov dh,PB R24Value[ecx+ebp*1] ; Get clamped R value for Pel01.
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add esi,4 ; Advance source stream cursor.
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mov G2B2R1G1+3072,edx ; Stash 1.33 pels.
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mov dh,PB B24Value[ecx+eax*2] ; Get clamped B value for Pel01.
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mov cl,ChromaContribution+3072+2 ; Reload UV contribution to G value.
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add edi,12 ; Advance color converted output cursor.
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mov dl,PB R24Value[ebx+ebp*1] ; Get clamped R value for Pel00.
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mov ebp,ChromaContribution+3072+20 ; Get next V contribution to R value.
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shl edx,16 ; Position R for Pel00 and B for Pel01.
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and ebp,01FFH ; Extract V contrib to R val. 0 --> EOL.
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mov dl,PB B24Value[ebx+eax*2] ; Get clamped B value for Pel00.
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mov eax,G2B2R1G1+3072 ; Reload 2nd 1.33 pels.
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mov dh,PB G24Value[ebx+ecx] ; Get clamped G value for Pel00.
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mov cl,[esi+3] ; Get next Y03.
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mov Ze [edi-12],edx ; Write the first 1.33 pels out.
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mov bl,ChromaContribution+3072+22 ; Get UV contribution to G value.
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mov Ze [edi-8],eax ; Write the second 1.33 pels out.
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mov edx,R3G3B3R2+3072
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mov Ze [edi-4],edx ; Write the third 1.33 pels out.
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mov eax,ebx ; Zero out upper bytes of eax.
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mov dl,PB G24Value[ecx+ebx] ; Get clamped G value for Pel03.
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lea esp,[esp+16]
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jne DoNext4YPelsOfLine0
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and esp,0FFFFF000H
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add esp,1000H
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add edi,CCOSkipDistance
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SkipLine0:
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mov bl,LineParity
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mov ebp,YSkipDistance ; *** change to use ebp *** rgm 3/27/96
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xor bl,1
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je Line1Done
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mov LineParity,bl
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mov edx,AspectCount
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add esi,ebp ; *** change to use ebp *** rgm 3/27/96
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dec edx ; If count is non-zero, we keep the line.
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mov AspectCount,edx
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jne KeepLine1
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add esi,FrameWidth
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mov edx,AspectAdjustmentCount
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mov AspectCount,edx
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xor ebx, ebx ; *** change to advance parity *** rgm
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Line1Done:
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mov LineParity,bl
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add ebp,esi ; *** change to use ebp *** rgm 3/27/96
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mov CCOCursor,edi
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mov esi,VCursor ; Inc VPlane cursor to next line.
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mov ebx,ChromaPitch
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mov YCursor,ebp ; *** change to use ebp *** rgm 3/27/96
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add esi,ebx
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mov ebx,YLimit ; Done with last line?
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mov VCursor,esi
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cmp ebp,ebx ; *** change to use ebp *** rgm 3/27/96
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jb PrepareChromaLine
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mov esp,StashESP
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pop ebx
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pop ebp
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pop edi
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pop esi
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rturn
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YUV12ToRGB24 endp
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END
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