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FM Towns: Free Software Collection 8
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FM Towns Free Software Collection 8.iso
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szoom.asm
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Assembly Source File
|
1994-06-01
|
9KB
|
550 lines
; SOUND ZOOM
;
; call from F-BASIC386 or High C
; callm address,varptr(source),varptr(new),varptr(param),varptr(work)
; void SZOOM(*sourcesnd,*newsnd,*param,*work)
;
;
; 1990 3 Hiroshi TODA
;
; 1993 12 High C 用に改造
;
; param: cycle , amp*10000H , time*10000H
; work area = 256Byte
;
;
.386p
param struc
dd ?
dd ?
source dd ? ; source snd.data address
new dd ? ; new snd.data address
paradd dd ? ; param. address
wadd dd ? ; work address
param ends
work struc
;data area
cycle dd ? ; cycle
amp dd ? ; amplitude expand rate
time dd ? ; time expand rate
max dd ? ; max length
;work area
rend dd ? ; read end
rated dd ? ; add rate
ratea dd ? ; add buf.
lst1 dd ? ; loop start check
lst2 dd ? ; loop start
lend1 dd ? ; loop end check
lend2 dd ? ; loop end
pbuf dd ? ; buf
dd ?
dd ?
count1 dd ? ; cycle count buf.
count2 dd ? ; cycle*10000H
work ends
cseg segment dword public use32 'CODE'
assume cs:cseg,ds:cseg
public sndExpand
db 'sndExpand',9
sndExpand proc near
push ebp
mov ebp,esp
push esi
push edi
push ebx
mov esi,[ebp].wadd ; esi <-- work area top add
mov ecx,[ebp].paradd ; ecx <-- para. add.
xor edx,edx ; edx=count
main01: mov eax,[ecx][edx*4] ; para. --> work area
mov [esi][edx*4],eax
inc edx
cmp edx,4
jb main01
mov ebx,[ebp].source ; ebx <-- source snd. add.
mov edi,[ebp].new ; edi <-- new snd. add.
xor edx,edx ; head trans
main02: mov eax,[ebx][edx*4]
mov [edi][edx*4],eax
inc edx
cmp edx,8
jb main02
mov eax,[esi].cycle ; count set
cmp eax,0
jne main00
mov eax,1
mov [esi].cycle,eax
main00: mov [esi].count1,eax
xor ecx,ecx ; ecx <-- counter
mov eax,[ebx+12]
mov [esi].rend,eax
cmp eax,0
je mainE
mov eax,[ebx+16] ; loop start
add eax,ebx
add eax,32
mov [esi].lst1,eax
add eax,[ebx+20] ; loop end
mov [esi].lend1,eax
add ebx,32 ; add head(32Byte)
add edi,32
add [esi].rend,ebx
; sub [esi].rend,1 ; 1993 12 -1は止める
xor eax,eax ; loop clear
mov [esi].lst2,eax
mov [esi].lend2,eax
xor eax,eax ; set time rate
mov [esi].ratea,eax
cmp dword ptr [esi].time,10000H
jb main03
mov eax,[esi].time ; hi
sub eax,10000H
mov [esi].rated,eax
mov eax,[esi].cycle ; set count2
shl eax,16
mov [esi].count2,eax
jmp main04
main03: mov eax,10000H
sub eax,[esi].time
mov [esi].rated,eax
mov eax,10000H ; set count2
sub eax,[esi].rated
mul dword ptr [esi].cycle
mov [esi].count2,eax
main04: mov al,[ebx] ; trans while zero
mov [edi],al
cmp ebx,[esi].lst1
jne main0A
mov [esi].lst2,ecx
main0A: cmp ebx,[esi].lend1
jne main0B
mov [esi].lend2,ecx
main0B: inc ecx
inc ebx
inc edi
cmp ebx,[esi].rend
jae mainE
dec dword ptr [esi].max
je mainE
and al,7fH
je main04
dec ebx
dec edi
dec ecx
inc dword ptr [esi].max
cmp dword ptr [esi].time,10000H
jb main05
call hi
jmp main06
main05: call lw
main06: cmp ecx,2000H ; data min length
jae main0D
cmp [esi].max,0
je main0D
mov al,80H
main0C: mov [edi],al
dec dword ptr [esi].max
je main0D
inc ecx
inc edi
cmp ecx,2000H
jb main0C
main0D: mov edi,[ebp].new ; edi <-- new snd. add.
mov [edi+12],ecx ; set length
mov eax,[esi].lst2 ; set loop point
cmp eax,ecx
jb main07
mov eax,ecx
dec eax
main07: mov [edi+16],eax
mov eax,[esi].lend2 ; set loop length
sub eax,[esi].lst2
mov edx,eax
add edx,[edi+16]
cmp edx,ecx
jb main08
mov eax,ecx
sub eax,[edi+16]
main08: mov [edi+20],eax
mainE:
pop ebx
pop edi
pop esi
mov esp,ebp
pop ebp
ret
hi: call red ; read
imul dword ptr [esi].amp
shrd eax,edx,16
call wr ; write
cmp ebx,[esi].lst1 ; sound loop check
jne hi0A
mov [esi].lst2,ecx
hi0A: cmp ebx,[esi].lend1
jne hi0B
mov [esi].lend2,ecx
hi0B: inc ecx
dec dword ptr [esi].max
je hiE
; mov ax,[edi-2] ; cross check
; cmp ax,8080H
; je hi00
; and eax,8080H
; cmp eax,80H
call close_ck
jne hi03
hi00: mov eax,[esi].rated ; ratea=ratea+rated
add [esi].ratea,eax
hi01: mov eax,[esi].ratea
cmp eax,[esi].count2
jb hi03
sub eax,[esi].count2
mov [esi].ratea,eax
mov [esi].pbuf,ebx ; make wave
mov eax,[esi].cycle ; set cycle count
mov [esi].count1,eax
hi02: inc ebx ; loop start
call red ; read
imul dword ptr [esi].amp
shrd eax,edx,16
call wr
cmp ebx,[esi].lst1 ; sound loop check
jne hi0C
mov [esi].lst2,ecx
hi0C: cmp ebx,[esi].lend1
jne hi0D
mov [esi].lend2,ecx
hi0D: inc ecx
cmp ebx,[esi].rend
jae hiE
dec dword ptr [esi].max
je hiE
; mov ax,[edi-2]
; cmp ax,8080H
; je hi0E
; and eax,8080H
; cmp eax,80H
call close_ck
jne hi02 ; loop end
hi0E: dec dword ptr [esi].count1 ; cycle count
jne hi02
mov ebx,[esi].pbuf ; buf. -> ebx
dec edi ; 1Byte over write
; dec edi
; mov eax,[edi]
; call red2
; sar eax,2
; call wr
; call red
; imul dword ptr [esi].amp
; shrd eax,edx,16
; sar eax,2
mov eax,[edi-1]
call red2
push eax ; over write data を push
inc ebx ; 1つ先と平均化
call red ; read
dec ebx
imul dword ptr [esi].amp
shrd eax,edx,16
add [esp],eax
pop eax
sar eax,1 ; over write data と 平均化
call wr
jmp hi01
hi03: inc ebx
cmp ebx,[esi].rend
jb hi
hiE: ret
lw: call red ; read
imul dword ptr [esi].amp
shrd eax,edx,16
call wr ; write
cmp ebx,[esi].lst1 ; sound loop check
jne lw0A
mov [esi].lst2,ecx
lw0A: cmp ebx,[esi].lend1
jne lw0B
mov [esi].lend2,ecx
lw0B: inc ecx
dec dword ptr [esi].max
je lwE
; mov ax,[edi-2] ; cross check
; cmp ax,8080H
; je lw00
; and eax,8080H
; cmp eax,80H
call close_ck
jne lw03
lw00: mov eax,[esi].rated ; ratea=ratea+rated
add [esi].ratea,eax
lw01: mov eax,[esi].ratea
cmp eax,[esi].count2
jb lw03
sub eax,[esi].count2 ; delete wave
mov [esi].ratea,eax
mov [esi].pbuf,ecx ; count(ecx,edi,max) -> buf.
mov [esi].pbuf+4,edi
mov eax,[esi].max
mov [esi].pbuf+8,eax
mov eax,[esi].cycle ; set cycle count
mov [esi].count1,eax
lw02: inc ebx ; loop start
call red ; read
imul dword ptr [esi].amp
shrd eax,edx,16
call wr
cmp ebx,[esi].lst1 ; sound loop check
jne lw0C
mov [esi].lst2,ecx
lw0C: cmp ebx,[esi].lend1
jne lw0D
mov [esi].lend2,ecx
lw0D: inc ecx
cmp ebx,[esi].rend
jae lwE
dec dword ptr [esi].max
je lwE
; mov ax,[edi-2]
; cmp ax,8080H
; je lw0E
; and eax,8080H
; cmp eax,80H
call close_ck
jne lw02 ; loop end
lw0E: dec dword ptr [esi].count1 ; cycle count
jne lw02
mov ecx,[esi].pbuf ; buf. -> count(ecx,edi)
mov edi,[esi].pbuf+4
mov eax,[esi].pbuf+8
mov [esi].max,eax
dec edi ; 1Byte over write
; dec edi
; mov eax,[edi]
; call red2
; sar eax,2
; call wr
; call red
; imul dword ptr [esi].amp
; shrd eax,edx,16
; sar eax,2
mov eax,[edi-1]
call red2
push eax ; over write data を push
inc ebx ; 1つ先と平均化
call red ; read
dec ebx
imul dword ptr [esi].amp
shrd eax,edx,16
add [esp],eax
pop eax
sar eax,1 ; over write data と 平均化
call wr
jmp lw01
lw03: inc ebx
cmp ebx,[esi].rend
jb lw
lwE: ret
; edi-4を境にクロスしてるかをフィルタ(平均化)にかけて判断
; eax = 0ならクロス, eax != 0ならノンクロス
close_ck:
push ecx
push edx
; mov eax,[edi-8]
mov eax,[ebx-2] ; オリジナルを見るように変更
shld edx,eax,8
cmp dl,80h
jb cls00
mov dh,dl
mov dl,80h
sub dl,dh
cls00:
movsx edx,dl
mov ecx,edx
shld edx,eax,16
cmp dl,80h
jb cls01
mov dh,dl
mov dl,80h
sub dl,dh
cls01:
movsx edx,dl
add ecx,edx
add ecx,edx
shld edx,eax,24
cmp dl,80h
jb cls02
mov dh,dl
mov dl,80h
sub dl,dh
cls02:
movsx edx,dl
add ecx,edx
shld edx,eax,32
cmp dl,80h
jb cls03
mov dh,dl
mov dl,80h
sub dl,dh
cls03:
movsx edx,dl
; add ecx,edx
cmp ecx,0
; jge cls_no
jg cls_no
; mov eax,[edi-4]
mov eax,[ebx-1] ; オリジナルを見るように変更
shld edx,eax,8
cmp dl,80h
jb cls10
mov dh,dl
mov dl,80h
sub dl,dh
cls10:
movsx edx,dl
mov ecx,edx
shld edx,eax,16
cmp dl,80h
jb cls11
mov dh,dl
mov dl,80h
sub dl,dh
cls11:
movsx edx,dl
add ecx,edx
add ecx,edx
shld edx,eax,24
cmp dl,80h
jb cls12
mov dh,dl
mov dl,80h
sub dl,dh
cls12:
movsx edx,dl
add ecx,edx
shld edx,eax,32
cmp dl,80h
jb cls13
mov dh,dl
mov dl,80h
sub dl,dh
cls13:
movsx edx,dl
; add ecx,edx
cmp ecx,0
; jle cls_no
jl cls_no
xor eax,eax
jmp cls_end
cls_no:
xor eax,eax
sub eax,1
cls_end:
pop edx
pop ecx
ret
; WRITE DATA
; eax -> pcm data -> [edi] & inc edi
wr: cmp eax,0 ; write
js wr01
je wr01
cmp eax,128 ; +
jb wr02
mov eax,127
jmp wr02
wr01: mov edx,eax ; -
mov eax,128
sub eax,edx
cmp eax,256-1 ; data255はloopStopの意味があるから除外 1993 12
jb wr02
mov eax,255-1 ; data255はloopStopの意味があるから除外 1993 12
wr02: mov [edi],al
inc edi
ret
; PCM DATA READ
; [ebx] -> output eax
red: mov al,[ebx] ; read
red2: and eax,0ffH ; eaxにあるpcm dataをsigned intに変換するときに呼ぶ
cmp eax,128
jb red01
mov edx,eax
mov eax,128
sub eax,edx
red01: ret
sndExpand endp
cseg ends
end