RedAlert/WIN32LIB/AUDIO/OLD/OLSOSDEC.ASM

;
;	Command & Conquer Red Alert(tm)
;	Copyright 2025 Electronic Arts Inc.
;
;	This program is free software: you can redistribute it and/or modify
;	it under the terms of the GNU General Public License as published by
;	the Free Software Foundation, either version 3 of the License, or
;	(at your option) any later version.
;
;	This program 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 General Public License for more details.
;
;	You should have received a copy of the GNU General Public License
;	along with this program.  If not, see <http://www.gnu.org/licenses/>.
;

;****************************************************************************
;*
;*          Copyright (c) 1994, HMI, INC. All Rights Reserved
;*
;*---------------------------------------------------------------------------
;*
;* FILE
;*     soscodec.asm
;*
;* DESCRIPTION
;*     HMI SOS ADPCM compression/decompression.
;*
;* PROGRAMMER
;*     Nick Skrepetos
;*     Denzil E. Long, Jr. (Fixed bugs, rewrote for watcom)
;*	   Bill Petro		   (Added stereo support)
;* DATE
;*     Febuary 15, 1995
;*
;*---------------------------------------------------------------------------
;*
;* PUBLIC
;*
;****************************************************************************

	IDEAL
	P386
	MODEL	USE32 FLAT
	LOCALS	??


DPMI_INTR		equ	31h
IF_LOCKED_PM_CODE	equ	1h		; Locked PM code for DPMI.
IF_LOCKED_PM_DATA	equ	2h		; Locked PM code for DPMI.

	STRUC	sCompInfo
lpSource		DD	?	;Compressed data pointer
lpDest			DD	?	;Uncompressed data pointer
dwCompSize		DD	?	;Compressed size
dwUnCompSize		DD	?	;Uncompressed size

dwSampleIndex		DD	?	;Index into sample
dwPredicted		DD	?	;Next predicted value
dwDifference		DD	?	;Difference from last sample
wCodeBuf		DW	?	;Holds 2 nibbles for decompression
wCode			DW	?	;Current 4 bit code
wStep			DW	?	;Step value in table
wIndex			DW	?	;Index into step table

dwSampleIndex2		DD	?	;Index into sample
dwPredicted2		DD	?	;Next predicted value
dwDifference2		DD	?	;Difference from last sample
wCodeBuf2 		DW	?	;Holds 2 nibbles for decompression
wCode2			DW	?	;Current 4 bit code
wStep2			DW	?	;Step value in table
wIndex2		DW	?	;Index into step table

wBitSize		DW	?	;Bit size for decompression
wChannels		DW	?    	;number of channels
	ENDS	sCompInfo

	DATASEG


InitFlags	DD	0		; Flags to indicate what has been initialized.


LABEL	LockedDataStart	BYTE

;* Index table for stepping into step table

wCODECIndexTab	DW	-1,-1,-1,-1,2,4,6,8
		DW	-1,-1,-1,-1,2,4,6,8


;Lookup table of replacement values
;The actual sound value is replaced with an index to lookup in this table
;The index only takes up a nibble(4bits) and represents an int(16bits)
;Essentially:
;Get a value
;compare it with the value before it
;find closest value in table and store the index into the table
;if i'm going down then negitize it
;go to next byte.

;Theory for stereo:
;1)handle stereo and mono in two seperate loops. cleaner...
;start at byte 0 and skip every other byte(or word) both write and read
;when we get done
;	set start byte to 1 and do it again




;This table essentialy round off to closes values in 3 distinct bands
; precalculated and optimized(i guess) for human hearing.

wCODECStepTab	DW	7,  	8,  	9,   	10,   	11,  	12,   	13,14
	DW	16, 	17, 	19, 	21,  	23,   	25,  	28,   	31
	DW	34, 	37, 	41, 	45,  	50,   	55,  	60,   	66
	DW	73, 	80, 	88, 	97,  	107,  	118, 	130,  	143
	DW	157,	173,	190,	209, 	230,  	253, 	279,  	307
	DW	337,	371,	408,	449, 	494,  	544, 	598,  	658
	DW	724,	796,	876,	963, 	1060,	1166,	1282,	1411
	DW	1552,	1707,	1878,	2066,	2272,	2499,	2749,	3024
	DW	3327,	3660,	4026,	4428,	4871,	5358,	5894,	6484
	DW	7132,	7845,	8630,	9493,	10442,	11487,	12635,	13899
	DW	15289,	16818,	18500,	20350,	22385,	24623,	27086,	29794
	DW	32767

;dwCODECByteIndex		DD	0 ; this is when to stop compressing
;dwCODECTempStep		DD	0 ; tempory storage for step value
;wCODECMask			DW	0 ; Current mask

LABEL	LockedDataEnd	BYTE


	CODESEG

LABEL	LockedCodeStart	BYTE

;****************************************************************************
;*
;* NAME
;*     sosCODECInitStream - Initialize compression stream.
;*
;* SYNOPSIS
;*     sosCODECInitStream(CompInfo)
;*
;*     void sosCODECInitStream(_SOS_COMPRESS_INFO *);
;*
;* FUNCTION
;*     Initialize compression stream for compression and decompression.
;*
;* INPUTS
;*     CompInfo - Compression information structure.
;*
;* RESULT
;*     NONE
;*
;****************************************************************************

	GLOBAL	C sosCODECInitStream:NEAR
	PROC	sosCODECInitStream C NEAR

	ARG	sSOSInfo:NEAR PTR

	mov	eax,[sSOSInfo]
	mov	[(sCompInfo eax).wIndex],0 		; starting index 0
	mov	[(sCompInfo eax).wStep],7  		; start with a step of 7
	mov	[(sCompInfo eax).dwPredicted],0 	; no predicted value
	mov	[(sCompInfo eax).dwSampleIndex],0	;start at head of index
	mov	[(sCompInfo eax).wIndex2],0 		; starting index 0
	mov	[(sCompInfo eax).wStep2],7  		; start with a step of 7
	mov	[(sCompInfo eax).dwPredicted2],0 	; no predicted value
	mov	[(sCompInfo eax).dwSampleIndex2],0 	;start at head of index
	ret

	ENDP	sosCODECInitStream



;****************************************************************************
;*
;* NAME
;*     sosCODECDecompressData - Decompress audio data.
;*
;* SYNOPSIS
;*     Size = sosCODECDecompressData(CompInfo, NumBytes)
;*
;*     long sosCODECDecompressData(_SOS_COMPRESS_INFO *, long);
;*
;* FUNCTION
;*     Decompress data from a 4:1 ADPCM compressed stream. The number of
;*     bytes decompressed is returned.
;*
;* INPUTS
;*     CompInfo - Compress information structure.
;*     NumBytes - Number of bytes to compress.
;*
;* RESULT
;*     Size - Size of decompressed data.
;*
;****************************************************************************

	GLOBAL	C General_sosCODECDecompressData:NEAR
	PROC	General_sosCODECDecompressData C NEAR

	ARG	sSOSInfo:NEAR PTR
	ARG	wBytes:DWORD

	local	dwCODECBytesProcessed:dword             ;bytes to decompress
	local	dwCODECByteIndex:dword			;this is when to stop compressing
							; these need to be local if the function is to be reenterant
	push	esi
	push	edi
	push	ebx
	push	ecx
	push	edx

;*---------------------------------------------------------------------------
;*	Initialize
;*---------------------------------------------------------------------------

	mov	ebx,[sSOSInfo]
	mov	eax,[wBytes]
	mov	[dwCODECBytesProcessed],eax
	mov	[(sCompInfo ebx).dwSampleIndex],0 	;start at head of index
	mov	[(sCompInfo ebx).dwSampleIndex2],0 	;start at head of index

							;Check for 16 bit decompression

	cmp	[(sCompInfo ebx).wBitSize],16
	jne	short ??skipByteDivide

	shr	eax,1	;Divide size by two

??skipByteDivide:
	mov	[dwCODECByteIndex],eax
	mov	esi,[(sCompInfo ebx).lpSource]
	mov	edi,[(sCompInfo ebx).lpDest]
	cmp	[(sCompInfo ebx).wChannels],2		;stereo check
	je	??mainloopl				;do left side first

;	Determine if sample index is even or odd. This will determine
;	if we need to get a new token or not.

;---------------------------------------------------------------------------
;Main Mono Loop
;---------------------------------------------------------------------------



??mainloop:
	test	[(sCompInfo ebx).dwSampleIndex],1	;odd ??
	je	short ??fetchToken			; if so get new token
	xor	eax,eax					;else shift int codebuf
	mov	ax,[(sCompInfo ebx).wCodeBuf]		;ored with Code
	shr	eax,4
	and	eax,000Fh
	mov	[(sCompInfo ebx).wCode],ax
	jmp	short ??calcDifference

??fetchToken:
	xor	eax,eax					;get a new token
	mov	al,[esi]				;put in codebuf
	mov	[(sCompInfo ebx).wCodeBuf],ax
	inc	esi
	and	eax,000Fh
	mov	[(sCompInfo ebx).wCode],ax		;and then code

??calcDifference:
	mov	[(sCompInfo ebx).dwDifference],0	;reset diff
	xor	ecx,ecx
	mov	cx,[(sCompInfo ebx).wStep]		;cx is step value
	test	eax,4					;Check for wCode & 4
	je	short ??no4
	add	[(sCompInfo ebx).dwDifference],ecx	;Add wStep

??no4:
	test	eax,2					;Check for wCode & 2
	je	short ??no2
	mov	edx,ecx					;Add wStep >> 1
	shr	edx,1
	add	[(sCompInfo ebx).dwDifference],edx

??no2:
	test	eax,1					;Check for wCode & 1
	je	short ??no1
	mov	edx,ecx					;Add wStep >> 2
	shr	edx,2
	add	[(sCompInfo ebx).dwDifference],edx

??no1:
	mov	edx,ecx					;Add in wStep >> 3
	shr	edx,3
	add	[(sCompInfo ebx).dwDifference],edx
	test	eax,8					;Check for wCode & 8
	je	short ??no8
	neg	[(sCompInfo ebx).dwDifference]		;Negate diff

??no8:
	; add difference to predicted value.

	mov	eax,[(sCompInfo ebx).dwPredicted]
	add	eax,[(sCompInfo ebx).dwDifference]

	; make sure there is no under or  overflow.

	cmp	eax,7FFFh
	jl	short ??noOverflow
	mov	eax,7FFFh

??noOverflow:
	cmp	eax,0FFFF8000h
	jg	short ??noUnderflow
	mov	eax,0FFFF8000h

??noUnderflow:
	mov	[(sCompInfo ebx).dwPredicted],eax
	cmp	[(sCompInfo ebx).wBitSize],16
	jne	short ??output8Bit
	mov	[edi],ax				;Output 16bit sample
	add	edi,2
	jmp	short ??adjustIndex

??output8Bit:
	; output 8 bit sample

	xor	ah,80h
	mov	[edi],ah
	inc	edi

??adjustIndex:
	xor	ecx,ecx
	mov	cx,[(sCompInfo ebx).wCode]
	xor	eax,eax
	shl	ecx,1
	mov	ax,[wCODECIndexTab + ecx]
	add	[(sCompInfo ebx).wIndex],ax 		;check if wIndex < 0
	cmp	[(sCompInfo ebx).wIndex],8000h
	jb	short ??checkOverflow
	mov	[(sCompInfo ebx).wIndex],0		;reset index to zero
	jmp	short ??adjustStep

??checkOverflow:
	cmp	[(sCompInfo ebx).wIndex],88		;check if wIndex > 88
	jbe	short ??adjustStep
	mov	[(sCompInfo ebx).wIndex],88		;reset index to 88

??adjustStep:
	; fetch wIndex so we can fetch new step value

	xor	ecx,ecx
	mov	cx,[(sCompInfo ebx).wIndex]
	xor	eax,eax
	shl	ecx,1
	mov	ax,[wCODECStepTab + ecx]

	; advance index and store step value

	add	[(sCompInfo ebx).dwSampleIndex],1
	mov	[(sCompInfo ebx).wStep],ax

	; decrement bytes processed and loop back.

	dec	[dwCODECByteIndex]
	jne	??mainloop
	jmp	??exitout

;--------------------------------------------------------------------------
;Left Channel Start
;--------------------------------------------------------------------------


??mainloopl:
	test	[(sCompInfo ebx).dwSampleIndex],1
	je	short ??fetchTokenl

	xor	eax,eax
	mov	ax,[(sCompInfo ebx).wCodeBuf]
	shr	eax,4
	and	eax,000Fh
	mov	[(sCompInfo ebx).wCode],ax
	jmp	short ??calcDifferencel

??fetchTokenl:
	xor	eax,eax
	mov	al,[esi]
	mov	[(sCompInfo ebx).wCodeBuf],ax
	add	esi,2					;2 for stereo
	and	eax,000Fh
	mov	[(sCompInfo ebx).wCode],ax

??calcDifferencel:
							; reset difference

	mov	[(sCompInfo ebx).dwDifference],0
	xor	ecx,ecx
	mov	cx,[(sCompInfo ebx).wStep]
	test	eax,4					;Check for wCode & 4
	je	short ??no4l
	add	[(sCompInfo ebx).dwDifference],ecx	;Add wStep

??no4l:
	test	eax,2					;Check for wCode & 2
	je	short ??no2l
	mov	edx,ecx					;Add wStep >> 1
	shr	edx,1
	add	[(sCompInfo ebx).dwDifference],edx

??no2l:
	test	eax,1					;Check for wCode & 1
	je	short ??no1l
	mov	edx,ecx					;Add wStep >> 2
	shr	edx,2
	add	[(sCompInfo ebx).dwDifference],edx

??no1l:
	mov	edx,ecx					;Add in wStep >> 3
	shr	edx,3
	add	[(sCompInfo ebx).dwDifference],edx
	test	eax,8					;Check for wCode & 8
	je	short ??no8l
	neg	[(sCompInfo ebx).dwDifference]		;Negate diff

??no8l:
		; add difference to predicted value.

	mov	eax,[(sCompInfo ebx).dwPredicted]
	add	eax,[(sCompInfo ebx).dwDifference]

		; make sure there is no under or  overflow.

	cmp	eax,7FFFh
	jl	short ??noOverflowl
	mov	eax,7FFFh

??noOverflowl:
	cmp	eax,0FFFF8000h
	jg	short ??noUnderflowl
	mov	eax,0FFFF8000h

??noUnderflowl:
	mov	[(sCompInfo ebx).dwPredicted],eax
	cmp	[(sCompInfo ebx).wBitSize],16
	jne	short ??output8Bitl
	mov	[edi],ax				;Output 16bit sample
	add	edi,4					;4 for stereo
	jmp	short ??adjustIndexl

??output8Bitl:
	; output 8 bit sample

	xor	ah,80h
	mov	[edi],ah
	add	edi,2					;2 for stereo

??adjustIndexl:
	xor	ecx,ecx
	mov	cx,[(sCompInfo ebx).wCode]
	xor	eax,eax
	shl	ecx,1
	mov	ax,[wCODECIndexTab + ecx]
	add	[(sCompInfo ebx).wIndex],ax
							; check if wIndex < 0
	cmp	[(sCompInfo ebx).wIndex],8000h
	jb	short ??checkOverflowl
	mov	[(sCompInfo ebx).wIndex],0
	jmp	short ??adjustStepl			;reset index to zero


??checkOverflowl:

	cmp	[(sCompInfo ebx).wIndex],88		; check if wIndex > 88
	jbe	short ??adjustStepl
	mov	[(sCompInfo ebx).wIndex],88		; reset index to 88

??adjustStepl:
	; fetch wIndex so we can fetch new step value

	xor	ecx,ecx
	mov	cx,[(sCompInfo ebx).wIndex]
	xor	eax,eax
	shl	ecx,1
	mov	ax,[wCODECStepTab + ecx]

	; advance index and store step value

	add	[(sCompInfo ebx).dwSampleIndex],1
	mov	[(sCompInfo ebx).wStep],ax

	; decrement bytes processed and loop back.

	sub	[dwCODECByteIndex],2
	jne	??mainloopl
;----------------------------------------------------------------------------
; Right Side Setup
;----------------------------------------------------------------------------
	mov	eax,[wBytes]
	mov	[dwCODECBytesProcessed],eax
	mov	esi,[(sCompInfo ebx).lpSource]
	mov	edi,[(sCompInfo ebx).lpDest]
	inc	esi					; skip left channel
	inc	edi				     	; skip left channel
	cmp	[(sCompInfo ebx).wBitSize],16		;16 bit ??
	je	short ??doByteDivide
	mov	[dwCODECByteIndex],eax
	jmp  short ??mainloopr

??doByteDivide:
	shr	eax,1 					;Divide size by two
	inc	edi   					; 16 bit so skip 1 more
	mov	[dwCODECByteIndex],eax


;--------------------------------------------------------------------------
;Right Channel Start
;--------------------------------------------------------------------------


??mainloopr:
	test	[(sCompInfo ebx).dwSampleIndex2],1
	je	short ??fetchTokenr
	xor	eax,eax
	mov	ax,[(sCompInfo ebx).wCodeBuf2]
	shr	eax,4
	and	eax,000Fh
	mov	[(sCompInfo ebx).wCode2],ax
	jmp	short ??calcDifferencer

??fetchTokenr:
	xor	eax,eax
	mov	al,[esi]
	mov	[(sCompInfo ebx).wCodeBuf2],ax
	add	esi,2				     	;2 for stereo
	and	eax,000Fh
	mov	[(sCompInfo ebx).wCode2],ax

??calcDifferencer:
							; reset difference

	mov	[(sCompInfo ebx).dwDifference2],0
	xor	ecx,ecx
	mov	cx,[(sCompInfo ebx).wStep2]
	test	eax,4					;Check for wCode & 4
	je	short ??no4r
	add	[(sCompInfo ebx).dwDifference2],ecx	;Add wStep

??no4r:
	test	eax,2					;Check for wCode & 2
	je	short ??no2r
	mov	edx,ecx					;Add wStep >> 1
	shr	edx,1
	add	[(sCompInfo ebx).dwDifference2],edx

??no2r:
	test	eax,1					;Check for wCode & 1
	je	short ??no1r
	mov	edx,ecx					;Add wStep >> 2
	shr	edx,2
	add	[(sCompInfo ebx).dwDifference2],edx

??no1r:
	mov	edx,ecx					;Add in wStep >> 3
	shr	edx,3
	add	[(sCompInfo ebx).dwDifference2],edx
	test	eax,8					;Check for wCode & 8
	je	short ??no8r
	neg	[(sCompInfo ebx).dwDifference2]		;Negate diff

??no8r:
	; add difference to predicted value.
	mov	eax,[(sCompInfo ebx).dwPredicted2]
	add	eax,[(sCompInfo ebx).dwDifference2]
	cmp	eax,7FFFh
	jl	short ??noOverflowr
	mov	eax,7FFFh

??noOverflowr:
	cmp	eax,0FFFF8000h
	jg	short ??noUnderflowr
	mov	eax,0FFFF8000h

??noUnderflowr:
	mov	[(sCompInfo ebx).dwPredicted2],eax
	cmp	[(sCompInfo ebx).wBitSize],16
	jne	short ??output8Bitr
	mov	[edi],ax				;Output 16bit sample
	add	edi,4					;4 for stereo		***
	jmp	short ??adjustIndexr

??output8Bitr:
							; output 8 bit sample
	xor	ah,80h
	mov	[edi],ah
	add	edi,2					;2 for stereo

??adjustIndexr:
	xor	ecx,ecx
	mov	cx,[(sCompInfo ebx).wCode2]
	xor	eax,eax
	shl	ecx,1
	mov	ax,[wCODECIndexTab + ecx]
	add	[(sCompInfo ebx).wIndex2],ax
							; check if wIndex < 0
	cmp	[(sCompInfo ebx).wIndex2],8000h
	jb	short ??checkOverflowr
							; reset index to zero
	mov	[(sCompInfo ebx).wIndex2],0
	jmp	short ??adjustStepr

??checkOverflowr:
							; check if wIndex > 88
	cmp	[(sCompInfo ebx).wIndex2],88
	jbe	short ??adjustStepr
	mov	[(sCompInfo ebx).wIndex2],88		; reset index to 88

??adjustStepr:
	; fetch wIndex so we can fetch new step value

	xor	ecx,ecx
	mov	cx,[(sCompInfo ebx).wIndex2]
	xor	eax,eax
	shl	ecx,1
	mov	ax,[wCODECStepTab + ecx]

	; advance index and store step value

	add	[(sCompInfo ebx).dwSampleIndex2],1
	mov	[(sCompInfo ebx).wStep2],ax

	; decrement bytes processed and loop back.

	sub	[dwCODECByteIndex],2
	jne	??mainloopr


??exitout:
;		don't think we need this but just in case i'll leave it here!!

;	mov	[(sCompInfo ebx).lpSource],esi
;	mov	[(sCompInfo ebx).lpDest],edi
	; set up return value for number of bytes processed.
	mov	eax,[dwCODECBytesProcessed]
	pop	edx
	pop	ecx
	pop	ebx
	pop	edi
	pop	esi
	ret

	ENDP	General_sosCODECDecompressData

LABEL	LockedCodeEnd	BYTE

;***************************************************************************
;* sosCODEC_LOCK -- locks the JLB audio decompression code		   *
;*                                                                         *
;* INPUT:	none                                                       *
;*                                                                         *
;* OUTPUT:      BOOL true is lock sucessful, false otherwise		   *
;*                                                                         *
;* PROTO:       BOOL sosCODEC_Lock(void);                         	   *
;*                                                                         *
;* HISTORY:								   *
;*   06/26/1995 PWG : Created.                                             *
;*=========================================================================*
	GLOBAL	C sosCODEC_Lock:NEAR
	PROC	sosCODEC_Lock C NEAR USES ebx ecx edx esi edi

	;
	; Lock the code that is used by the sos decompression method.
	;
	mov	eax,0600h			; function number.
	mov	ecx,OFFSET LockedCodeStart	; ecx must have start of memory.
	mov	edi,OFFSET LockedCodeEnd	; edi will have size of region in bytes.
	shld	ebx,ecx,16
	sub	edi, ecx
	shld	esi,edi,16
  	int	DPMI_INTR			; do call.
	jc	??error
	or	[InitFlags], IF_LOCKED_PM_CODE

	;
	; Lock the data used by the sos decompression method.
	;
	mov	eax,0600h			; function number.
	mov	ecx,OFFSET LockedDataStart	; ecx must have start of memory.
	mov	edi,OFFSET LockedDataEnd	; edi will have size of region in bytes.
	shld	ebx,ecx,16
	sub	edi, ecx
	shld	esi,edi,16
   	int	DPMI_INTR			; do call.
	jc	??error				; eax = 8 if mem err, eax = 9 if invalid mem region.
	or	[InitFlags], IF_LOCKED_PM_DATA

	mov	eax,1
	jmp	??exit
??error:
	xor	eax,eax
??exit:
	ret
	ENDP	sosCODEC_Lock

;***************************************************************************
;* DECOMPRESS_FRAME_UNLOCK -- Unlocks the JLB audio compression code       *
;*                                                                         *
;* INPUT:	none                                                       *
;*                                                                         *
;* OUTPUT:      BOOL true is unlock sucessful, false otherwise		   *
;*                                                                         *
;* PROTO:	BOOL sosCODEC_Unlock(void);                        	   *
;*                                                                         *
;* HISTORY:								   *
;*   06/26/1995 PWG : Created.                                             *
;*=========================================================================*
	GLOBAL	C sosCODEC_Unlock:NEAR
	PROC	sosCODEC_Unlock C NEAR USES ebx ecx edx esi edi

	test	[InitFlags],IF_LOCKED_PM_CODE
	jz	??code_not_locked

	mov	eax , 0601h
	mov	ecx,OFFSET LockedCodeStart	; ecx must have start of memory.
	mov	edi,OFFSET LockedCodeEnd	; edx will have size of region in bytes.
	sub	edi,ecx				;  - figure size.
	shld	ebx , ecx , 16
	shld	esi , edi , 16
	int	DPMI_INTR			; do call.
	jc	??error

??code_not_locked:
	test	[InitFlags],IF_LOCKED_PM_DATA
	jz	??data_not_locked

	mov	ax,0601h				; set es to descriptor of data.
	mov	ecx,OFFSET LockedDataStart	; ecx must have start of memory.
	mov	edi,OFFSET LockedDataEnd	; edx will have size of region in bytes.
	sub	edi,ecx				;  - figure size.
	shld	ebx , ecx , 16
	shld	esi , edi , 16
	int	DPMI_INTR			; do call.
	jc	??error				; eax = 8 if mem err, eax = 9 if invalid mem region.

??data_not_locked:
	mov	[InitFlags],0
	mov	eax,1
	jmp	??exit
??error:
	xor	eax,eax
??exit:
	ret
	ENDP	sosCODEC_Unlock


	END