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Revision 1104 - (download) (annotate)
Mon Jul 28 14:04:23 2003 UTC (15 years, 7 months ago)
File size: 4535 byte(s)
This commit was manufactured by cvs2svn to create tag 'release-0_9_2'.
;------------------------------------------------------------------------------
;
; MAKE_COLORSPACE(NAME,STACK, BYTES,PIXELS,ROWS, FUNC, ARG1)
;
; This macro provides a assembler width/height scroll loop
; NAME		function name
; STACK		additional stack bytes required by FUNC
; BYTES		bytes-per-pixel for the given colorspace
; PIXELS	pixels (columns) operated on per FUNC call
; VPIXELS	vpixels (rows) operated on per FUNC call
; FUNC		conversion macro name; we expect to find FUNC_INIT and FUNC macros
; ARG1		argument passed to FUNC
; 
; throughout the FUNC the registers mean:
; eax		y_stride
; ebx		u_ptr
; ecx		v_ptr
; edx		x_stride
; esi		y_ptr
; edi		x_ptr
; ebp		width
;
;------------------------------------------------------------------------------
%macro		MAKE_COLORSPACE			8
%define NAME		%1
%define STACK		%2
%define BYTES		%3
%define PIXELS		%4
%define VPIXELS		%5
%define FUNC		%6
%define ARG1		%7
%define ARG2		%8
	; --- define function global/symbol
align 16
cglobal NAME
NAME
	; --- init stack ---

%define pushsize	16
%define localsize	20 + STACK

%define vflip		    esp + localsize + pushsize + 40
%define height		    esp + localsize + pushsize + 36
%define width		    esp + localsize + pushsize + 32
%define uv_stride		esp + localsize + pushsize + 28
%define y_stride		esp + localsize + pushsize + 24
%define v_ptr			esp + localsize + pushsize + 20
%define u_ptr			esp + localsize + pushsize + 16
%define y_ptr			esp	+ localsize + pushsize + 12
%define x_stride		esp + localsize + pushsize + 8
%define x_ptr		    esp + localsize + pushsize + 4
%define _ip				esp + localsize + pushsize + 0

		push ebx	;	esp + localsize + 16
		push esi	;	esp + localsize + 8
		push edi	;	esp + localsize + 4
		push ebp	;	esp + localsize + 0

%define x_dif			esp + localsize - 4
%define y_dif			esp + localsize - 8
%define uv_dif			esp + localsize - 12
%define fixed_width		esp + localsize - 16
%define tmp_height		esp + localsize - 20

		sub esp, localsize

	; --- init varibles ---
	
		mov eax, [width]			; fixed width
		add eax, 15					;
		and eax, ~15				;
		mov [fixed_width],eax				;

		mov ebx, [x_stride]			;
%rep BYTES
		sub ebx, eax				;
%endrep
		mov [x_dif], ebx			; x_dif = x_stride - BYTES*fixed_width

		mov ebx, [y_stride]			;
		sub ebx, eax				;
		mov [y_dif], ebx			; y_dif = y_stride - fixed_width

		mov ebx, [uv_stride]		;
		mov ecx, eax				;
		shr ecx, 1					;
		sub ebx, ecx				;
		mov [uv_dif], ebx			; uv_dif = uv_stride - fixed_width/2

		mov esi, [y_ptr]		; $esi$ = y_ptr
		mov edi, [x_ptr]		; $edi$ = x_ptr
		mov edx, [x_stride]		; $edx$ = x_stride
		mov ebp, [height]		; $ebp$ = height


		mov ebx, [vflip]
		or ebx, ebx
		jz .dont_flip

	; --- do flipping ---

		xor ebx,ebx
%rep BYTES
		sub ebx, eax
%endrep
		sub ebx, edx
		mov [x_dif], ebx		; x_dif = -BYTES*fixed_width - x_stride

		mov eax, ebp
		sub eax, 1
		push edx				
		mul edx
		pop edx
		add edi, eax			; $edi$ += (height-1) * x_stride

		neg edx					; x_stride = -x_stride

.dont_flip

	; --- begin loop ---

		mov eax, [y_stride]		; $eax$ = y_stride
		mov ebx, [u_ptr]		; $ebx$ = u_ptr
		mov ecx, [v_ptr]		; $ecx$ = v_ptr

		FUNC %+ _INIT ARG1, ARG2		; call FUNC_INIT

.y_loop
		mov [tmp_height], ebp
		mov ebp, [fixed_width]

.x_loop
		FUNC ARG1, ARG2			; call FUNC

		add	edi, BYTES*PIXELS		; x_ptr += BYTES*PIXELS
		add	esi, PIXELS				; y_ptr += PIXELS
		add	ebx, PIXELS/2			; u_ptr += PIXELS/2
		add	ecx, PIXELS/2			; v_ptr += PIXELS/2
		
		sub ebp, PIXELS		; $ebp$ -= PIXELS
		jg	.x_loop			; if ($ebp$ > 0) goto .x_loop

		mov ebp, [tmp_height]
		add edi, [x_dif]		; x_ptr += x_dif + (VPIXELS-1)*x_stride
		add esi, [y_dif]		; y_ptr += y_dif + (VPIXELS-1)*y_stride
%rep VPIXELS-1
		add edi, edx			
		add esi, eax			
%endrep

		add ebx, [uv_dif]		; u_ptr += uv_dif + ((VPIXELS/2)-1)*uv_stride
		add ecx, [uv_dif]		; v_ptr += uv_dif + ((VPIXELS/2)-1)*uv_stride
%rep (VPIXELS/2)-1
		add ebx, [uv_stride]
		add ecx, [uv_stride]
%endrep

		sub ebp, VPIXELS	; $ebp$ -= VPIXELS
		jg .y_loop			; if ($ebp$ > 0) goto .y_loop

	; cleanup stack & undef everything

		add esp, localsize
		pop ebp
		pop edi
		pop esi
		pop ebx

%undef vflip
%undef height
%undef width
%undef uv_stride
%undef y_stride
%undef v_ptr
%undef u_ptr
%undef y_ptr
%undef x_stride
%undef x_ptr
%undef _ip
%undef x_dif
%undef y_dif
%undef uv_dif
%undef fixed_width
%undef tmp_height
		ret
%undef NAME
%undef STACK
%undef BYTES
%undef PIXELS
%undef VPIXELS
%undef FUNC
%undef ARG1
%endmacro
;------------------------------------------------------------------------------

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