huffmandecode.asm

这是一个数字图像处理的matlab仿真程序

		.code
HuffmanDecode?	proc	uses ebx esi edi,$lpMemory
		LOCAL	@ResultFlag,@SizeImage,@x,@lpMemory

		mov	@ResultFlag,FALSE
		mov	eax,$lpMemory
		.if	dword ptr [eax] == 'FUH'
			lea	ebx,[eax+4]
			add	eax,4+256*8
			lea	esi,[eax+sizeof BITMAPINFOHEADER+1024]
			assume	eax:ptr BITMAPINFOHEADER
			m2m	@SizeImage,[eax].biSizeImage
			invoke	GlobalAlloc,GMEM_FIXED or GMEM_ZEROINIT,[eax].biSizeImage
			mov	@lpMemory,eax
			assume	eax:nothing
			mov	edi,eax
			mov	edx,7
			mov	@x,0
			.repeat
				mov	eax,0
				mov	ecx,0
				.repeat
					inc	ecx
					bt	[esi],edx
					rcl	eax,1
					sub	edx,1
					.if	carry?
						mov	edx,7
						inc	esi
					.endif
					push	edi
					mov	edi,0
					.repeat
						.if	ecx == [ebx+edi*8+4] && eax == [ebx+edi*8]
							jmp	OutLabel
						.endif
						inc	edi
					.until	edi ==	256
					pop	edi
				.until	ecx ==	32
		OutLabel:	mov	eax,edi
				pop	edi
				mov	byte ptr [edi],al
				inc	edi
				inc	@x
				mov	eax,@x
			.until	eax ==	@SizeImage
		.endif
		mov	eax,@lpMemory
		ret
HuffmanDecode?	endp