524 lines
18 KiB
NASM
524 lines
18 KiB
NASM
IDEAL
|
|
|
|
p386
|
|
MODEL flat
|
|
|
|
dataseg
|
|
CODESEG
|
|
|
|
MASM
|
|
ALIGN 4
|
|
|
|
EXTRN _MV_HarshClipTable:DWORD
|
|
EXTRN _MV_MixDestination:DWORD
|
|
EXTRN _MV_MixPosition:DWORD
|
|
EXTRN _MV_LeftVolume:DWORD
|
|
EXTRN _MV_RightVolume:DWORD
|
|
EXTRN _MV_SampleSize:DWORD
|
|
EXTRN _MV_RightChannelOffset:DWORD
|
|
|
|
;================
|
|
;
|
|
; MV_Mix8BitMono16
|
|
;
|
|
;================
|
|
|
|
; eax - position
|
|
; edx - rate
|
|
; ebx - start
|
|
; ecx - number of samples to mix
|
|
|
|
PROC MV_Mix8BitMono16_
|
|
PUBLIC MV_Mix8BitMono16_
|
|
; Two at once
|
|
pushad
|
|
mov ebp, eax
|
|
|
|
mov esi, ebx ; Source pointer
|
|
inc esi
|
|
|
|
; Sample size
|
|
mov ebx, _MV_SampleSize
|
|
mov eax,OFFSET apatch7+2 ; convice tasm to modify code...
|
|
mov [eax],bl
|
|
mov eax,OFFSET apatch8+2 ; convice tasm to modify code...
|
|
mov [eax],bl
|
|
mov eax,OFFSET apatch9+3 ; convice tasm to modify code...
|
|
mov [eax],bl
|
|
|
|
; Volume table ptr
|
|
mov ebx, _MV_LeftVolume ; Since we're mono, use left volume
|
|
mov eax,OFFSET apatch1+4 ; convice tasm to modify code...
|
|
mov [eax],ebx
|
|
mov eax,OFFSET apatch2+4 ; convice tasm to modify code...
|
|
mov [eax],ebx
|
|
|
|
; Harsh Clip table ptr
|
|
mov ebx, _MV_HarshClipTable
|
|
add ebx, 128
|
|
mov eax,OFFSET apatch3+2 ; convice tasm to modify code...
|
|
mov [eax],ebx
|
|
mov eax,OFFSET apatch4+2 ; convice tasm to modify code...
|
|
mov [eax],ebx
|
|
|
|
; Rate scale ptr
|
|
mov eax,OFFSET apatch5+2 ; convice tasm to modify code...
|
|
mov [eax],edx
|
|
mov eax,OFFSET apatch6+2 ; convice tasm to modify code...
|
|
mov [eax],edx
|
|
|
|
mov edi, _MV_MixDestination ; Get the position to write to
|
|
|
|
; Number of samples to mix
|
|
shr ecx, 1 ; double sample count
|
|
cmp ecx, 0
|
|
je exit8m
|
|
|
|
; eax - scratch
|
|
; ebx - scratch
|
|
; edx - scratch
|
|
; ecx - count
|
|
; edi - destination
|
|
; esi - source
|
|
; ebp - frac pointer
|
|
; apatch1 - volume table
|
|
; apatch2 - volume table
|
|
; apatch3 - harsh clip table
|
|
; apatch4 - harsh clip table
|
|
; apatch5 - sample rate
|
|
; apatch6 - sample rate
|
|
|
|
mov eax,ebp ; begin calculating first sample
|
|
add ebp,edx ; advance frac pointer
|
|
shr eax,16 ; finish calculation for first sample
|
|
|
|
mov ebx,ebp ; begin calculating second sample
|
|
add ebp,edx ; advance frac pointer
|
|
shr ebx,16 ; finish calculation for second sample
|
|
|
|
movsx eax, byte ptr [esi+2*eax] ; get first sample
|
|
movsx ebx, byte ptr [esi+2*ebx] ; get second sample
|
|
add eax, 80h
|
|
add ebx, 80h
|
|
|
|
ALIGN 4
|
|
mix8Mloop:
|
|
movzx edx, byte ptr [edi] ; get current sample from destination
|
|
apatch1:
|
|
movsx eax, byte ptr [2*eax+12345678h] ; volume translate first sample
|
|
apatch2:
|
|
movsx ebx, byte ptr [2*ebx+12345678h] ; volume translate second sample
|
|
add eax, edx ; mix first sample
|
|
apatch9:
|
|
movzx edx, byte ptr [edi + 1] ; get current sample from destination
|
|
apatch3:
|
|
mov eax, [eax + 12345678h] ; harsh clip new sample
|
|
add ebx, edx ; mix second sample
|
|
mov [edi], al ; write new sample to destination
|
|
mov edx, ebp ; begin calculating third sample
|
|
apatch4:
|
|
mov ebx, [ebx + 12345678h] ; harsh clip new sample
|
|
apatch5:
|
|
add ebp,12345678h ; advance frac pointer
|
|
shr edx, 16 ; finish calculation for third sample
|
|
mov eax, ebp ; begin calculating fourth sample
|
|
apatch7:
|
|
add edi, 2 ; move destination to second sample
|
|
shr eax, 16 ; finish calculation for fourth sample
|
|
mov [edi], bl ; write new sample to destination
|
|
apatch6:
|
|
add ebp,12345678h ; advance frac pointer
|
|
movsx ebx, byte ptr [esi+2*eax] ; get fourth sample
|
|
movsx eax, byte ptr [esi+2*edx] ; get third sample
|
|
add ebx, 80h
|
|
add eax, 80h
|
|
apatch8:
|
|
add edi, 2 ; move destination to third sample
|
|
dec ecx ; decrement count
|
|
jnz mix8Mloop ; loop
|
|
|
|
mov _MV_MixDestination, edi ; Store the current write position
|
|
mov _MV_MixPosition, ebp ; return position
|
|
exit8m:
|
|
popad
|
|
ret
|
|
ENDP MV_Mix8BitMono16_
|
|
|
|
;================
|
|
;
|
|
; MV_Mix8BitStereo16
|
|
;
|
|
;================
|
|
|
|
; eax - position
|
|
; edx - rate
|
|
; ebx - start
|
|
; ecx - number of samples to mix
|
|
|
|
PROC MV_Mix8BitStereo16_
|
|
PUBLIC MV_Mix8BitStereo16_
|
|
|
|
pushad
|
|
mov ebp, eax
|
|
|
|
mov esi, ebx ; Source pointer
|
|
inc esi
|
|
|
|
; Sample size
|
|
mov ebx, _MV_SampleSize
|
|
mov eax,OFFSET bpatch8+2 ; convice tasm to modify code...
|
|
mov [eax],bl
|
|
; mov eax,OFFSET bpatch9+2 ; convice tasm to modify code...
|
|
; mov [eax],bl
|
|
|
|
; Right channel offset
|
|
mov ebx, _MV_RightChannelOffset
|
|
mov eax,OFFSET bpatch6+3 ; convice tasm to modify code...
|
|
mov [eax],ebx
|
|
mov eax,OFFSET bpatch7+2 ; convice tasm to modify code...
|
|
mov [eax],ebx
|
|
|
|
; Volume table ptr
|
|
mov ebx, _MV_LeftVolume
|
|
mov eax,OFFSET bpatch1+4 ; convice tasm to modify code...
|
|
mov [eax],ebx
|
|
|
|
mov ebx, _MV_RightVolume
|
|
mov eax,OFFSET bpatch2+4 ; convice tasm to modify code...
|
|
mov [eax],ebx
|
|
|
|
; Rate scale ptr
|
|
mov eax,OFFSET bpatch3+2 ; convice tasm to modify code...
|
|
mov [eax],edx
|
|
|
|
; Harsh Clip table ptr
|
|
mov ebx, _MV_HarshClipTable
|
|
add ebx,128
|
|
mov eax,OFFSET bpatch4+2 ; convice tasm to modify code...
|
|
mov [eax],ebx
|
|
mov eax,OFFSET bpatch5+2 ; convice tasm to modify code...
|
|
mov [eax],ebx
|
|
|
|
mov edi, _MV_MixDestination ; Get the position to write to
|
|
|
|
; Number of samples to mix
|
|
cmp ecx, 0
|
|
je short exit8S
|
|
|
|
; eax - scratch
|
|
; ebx - scratch
|
|
; edx - scratch
|
|
; ecx - count
|
|
; edi - destination
|
|
; esi - source
|
|
; ebp - frac pointer
|
|
; bpatch1 - left volume table
|
|
; bpatch2 - right volume table
|
|
; bpatch3 - sample rate
|
|
; bpatch4 - harsh clip table
|
|
; bpatch5 - harsh clip table
|
|
|
|
mov eax,ebp ; begin calculating first sample
|
|
shr eax,16 ; finish calculation for first sample
|
|
|
|
movsx ebx, byte ptr [esi+2*eax] ; get first sample
|
|
add ebx, 80h
|
|
|
|
ALIGN 4
|
|
mix8Sloop:
|
|
bpatch1:
|
|
movsx eax, byte ptr [2*ebx+12345678h] ; volume translate left sample
|
|
movzx edx, byte ptr [edi] ; get current sample from destination
|
|
bpatch2:
|
|
movsx ebx, byte ptr [2*ebx+12345678h] ; volume translate right sample
|
|
add eax, edx ; mix left sample
|
|
bpatch3:
|
|
add ebp,12345678h ; advance frac pointer
|
|
bpatch6:
|
|
movzx edx, byte ptr [edi+12345678h] ; get current sample from destination
|
|
bpatch4:
|
|
mov eax, [eax + 12345678h] ; harsh clip left sample
|
|
add ebx, edx ; mix right sample
|
|
mov [edi], al ; write left sample to destination
|
|
bpatch5:
|
|
mov ebx, [ebx + 12345678h] ; harsh clip right sample
|
|
mov edx, ebp ; begin calculating second sample
|
|
bpatch7:
|
|
mov [edi+12345678h], bl ; write right sample to destination
|
|
shr edx, 16 ; finish calculation for second sample
|
|
bpatch8:
|
|
add edi, 1 ; move destination to second sample
|
|
movsx ebx, byte ptr [esi+2*edx] ; get second sample
|
|
add ebx, 80h
|
|
dec ecx ; decrement count
|
|
jnz mix8Sloop ; loop
|
|
|
|
mov _MV_MixDestination, edi ; Store the current write position
|
|
mov _MV_MixPosition, ebp ; return position
|
|
|
|
EXIT8S:
|
|
popad
|
|
ret
|
|
ENDP MV_Mix8BitStereo16_
|
|
|
|
;================
|
|
;
|
|
; MV_Mix16BitMono16
|
|
;
|
|
;================
|
|
|
|
; eax - position
|
|
; edx - rate
|
|
; ebx - start
|
|
; ecx - number of samples to mix
|
|
|
|
PROC MV_Mix16BitMono16_
|
|
PUBLIC MV_Mix16BitMono16_
|
|
|
|
pushad
|
|
mov ebp, eax
|
|
|
|
mov esi, ebx ; Source pointer
|
|
|
|
; Sample size
|
|
mov ebx, _MV_SampleSize
|
|
mov eax,OFFSET cpatch4+2 ; convice tasm to modify code...
|
|
mov [eax],bl
|
|
mov eax,OFFSET cpatch5+3 ; convice tasm to modify code...
|
|
mov [eax],bl
|
|
|
|
; Volume table ptr
|
|
mov ebx, _MV_LeftVolume
|
|
mov eax,OFFSET cpatch2+4 ; convice tasm to modify code...
|
|
mov [eax],ebx
|
|
mov eax,OFFSET cpatch1+4 ; convice tasm to modify code...
|
|
inc ebx
|
|
mov [eax],ebx
|
|
|
|
; Rate scale ptr
|
|
mov eax,OFFSET cpatch3+2 ; convice tasm to modify code...
|
|
mov [eax],edx
|
|
|
|
mov edi, _MV_MixDestination ; Get the position to write to
|
|
|
|
; Number of samples to mix
|
|
cmp ecx, 0
|
|
je exit16M
|
|
|
|
; eax - scratch
|
|
; ebx - scratch
|
|
; edx - scratch
|
|
; ecx - count
|
|
; edi - destination
|
|
; esi - source
|
|
; ebp - frac pointer
|
|
; cpatch1 - volume table
|
|
; cpatch2 - volume table
|
|
; cpatch3 - sample rate
|
|
; cpatch4 - sample rate
|
|
|
|
mov ebx,ebp ; begin calculating first sample
|
|
add ebp,edx ; advance frac pointer
|
|
shr ebx,16 ; finish calculation for first sample
|
|
movzx eax, word ptr [esi+2*ebx] ; get low byte of sample
|
|
xor eax, 8000h
|
|
movzx ebx, ah
|
|
sub ah, ah
|
|
|
|
movsx edx, word ptr [edi] ; get current sample from destination
|
|
|
|
ALIGN 4
|
|
mix16Mloop:
|
|
cpatch1:
|
|
movsx eax, byte ptr [2*eax+12345678h] ; volume translate low byte of sample
|
|
cpatch2:
|
|
movsx ebx, word ptr [2*ebx+12345678h] ; volume translate high byte of sample
|
|
lea eax, [ eax + ebx + 80h ] ; mix high byte of sample
|
|
add eax, edx ; mix low byte of sample
|
|
cpatch5:
|
|
movsx edx, word ptr [edi + 2] ; get current sample from destination
|
|
|
|
cmp eax, -32768 ; Harsh clip sample
|
|
jge short m16skip1
|
|
mov eax, -32768
|
|
jmp short m16skip2
|
|
m16skip1:
|
|
cmp eax, 32767
|
|
jle short m16skip2
|
|
mov eax, 32767
|
|
m16skip2:
|
|
mov ebx, ebp ; begin calculating second sample
|
|
mov [edi], ax ; write new sample to destination
|
|
|
|
shr ebx, 16 ; finish calculation for second sample
|
|
cpatch3:
|
|
add ebp, 12345678h ; advance frac pointer
|
|
|
|
movzx eax, word ptr [esi+2*ebx] ; get second sample
|
|
cpatch4:
|
|
add edi, 2 ; move destination to second sample
|
|
xor eax, 8000h
|
|
movzx ebx, ah
|
|
sub ah, ah
|
|
|
|
dec ecx ; decrement count
|
|
jnz mix16Mloop ; loop
|
|
|
|
mov _MV_MixDestination, edi ; Store the current write position
|
|
mov _MV_MixPosition, ebp ; return position
|
|
EXIT16M:
|
|
popad
|
|
ret
|
|
ENDP MV_Mix16BitMono16_
|
|
|
|
;================
|
|
;
|
|
; MV_Mix16BitStereo16
|
|
;
|
|
;================
|
|
|
|
; eax - position
|
|
; edx - rate
|
|
; ebx - start
|
|
; ecx - number of samples to mix
|
|
|
|
PROC MV_Mix16BitStereo16_
|
|
PUBLIC MV_Mix16BitStereo16_
|
|
|
|
pushad
|
|
mov ebp, eax
|
|
|
|
mov esi, ebx ; Source pointer
|
|
|
|
; Sample size
|
|
mov ebx, _MV_SampleSize
|
|
mov eax,OFFSET dpatch9+2 ; convice tasm to modify code...
|
|
mov [eax],bl
|
|
|
|
; Right channel offset
|
|
mov ebx, _MV_RightChannelOffset
|
|
mov eax,OFFSET dpatch7+3 ; convice tasm to modify code...
|
|
mov [eax],ebx
|
|
mov eax,OFFSET dpatch8+3 ; convice tasm to modify code...
|
|
mov [eax],ebx
|
|
|
|
; Volume table ptr
|
|
mov ebx, _MV_LeftVolume
|
|
mov eax,OFFSET dpatch1+4 ; convice tasm to modify code...
|
|
mov [eax],ebx
|
|
mov eax,OFFSET dpatch2+4 ; convice tasm to modify code...
|
|
inc ebx
|
|
mov [eax],ebx
|
|
|
|
mov ebx, _MV_RightVolume
|
|
mov eax,OFFSET dpatch3+4 ; convice tasm to modify code...
|
|
mov [eax],ebx
|
|
mov eax,OFFSET dpatch4+4 ; convice tasm to modify code...
|
|
inc ebx
|
|
mov [eax],ebx
|
|
|
|
; Rate scale ptr
|
|
mov eax,OFFSET dpatch5+2 ; convice tasm to modify code...
|
|
mov [eax],edx
|
|
|
|
; Source ptr
|
|
mov eax,OFFSET dpatch6+4 ; convice tasm to modify code...
|
|
mov [eax],esi
|
|
|
|
mov edi, _MV_MixDestination ; Get the position to write to
|
|
|
|
; Number of samples to mix
|
|
cmp ecx, 0
|
|
je exit16S
|
|
|
|
; eax - scratch
|
|
; ebx - scratch
|
|
; edx - scratch
|
|
; esi - scratch
|
|
; ecx - count
|
|
; edi - destination
|
|
; ebp - frac pointer
|
|
; dpatch1 - left volume table
|
|
; dpatch2 - right volume table
|
|
; dpatch3 - sample rate
|
|
|
|
mov ebx,ebp ; begin calculating first sample
|
|
shr ebx,16 ; finish calculation for first sample
|
|
|
|
movzx edx, word ptr [esi+2*ebx] ; get first sample
|
|
xor edx, 8000h ; Change from signed to unsigned
|
|
movzx esi, dh ; put high byte in esi
|
|
sub dh, dh ; lo byte in edx
|
|
|
|
ALIGN 4
|
|
mix16Sloop:
|
|
; Left channel
|
|
dpatch1:
|
|
movsx eax, word ptr [2*esi+12345678h] ; volume translate high byte of sample
|
|
dpatch2:
|
|
movsx ebx, byte ptr [2*edx+12345678h] ; volume translate low byte of sample
|
|
lea eax, [ eax + ebx + 80h ] ; mix high byte of sample
|
|
|
|
; Right channel
|
|
dpatch3:
|
|
movsx esi, word ptr [2*esi+12345678h] ; volume translate high byte of sample
|
|
dpatch4:
|
|
movsx ebx, byte ptr [2*edx+12345678h] ; volume translate low byte of sample
|
|
lea ebx, [ esi + ebx + 80h ] ; mix high byte of sample
|
|
|
|
dpatch7:
|
|
movsx edx, word ptr [edi+12345678h] ; get current sample from destination
|
|
dpatch5:
|
|
add ebp,12345678h ; advance frac pointer
|
|
|
|
add eax, edx ; mix left sample
|
|
|
|
cmp eax, -32768 ; Harsh clip sample
|
|
jge short s16skip1
|
|
mov eax, -32768
|
|
jmp short s16skip2
|
|
s16skip1:
|
|
cmp eax, 32767
|
|
jle short s16skip2
|
|
mov eax, 32767
|
|
s16skip2:
|
|
movsx edx, word ptr [edi+2] ; get current sample from destination
|
|
mov [edi], ax ; write left sample to destination
|
|
add ebx, edx ; mix right sample
|
|
|
|
cmp ebx, -32768 ; Harsh clip sample
|
|
jge short s16skip3
|
|
mov ebx, -32768
|
|
jmp short s16skip4
|
|
s16skip3:
|
|
cmp ebx, 32767
|
|
jle short s16skip4
|
|
mov ebx, 32767
|
|
s16skip4:
|
|
|
|
mov edx, ebp ; begin calculating second sample
|
|
dpatch8:
|
|
mov [edi+12345678h], bx ; write right sample to destination
|
|
shr edx, 16 ; finish calculation for second sample
|
|
dpatch9:
|
|
add edi, 4 ; move destination to second sample
|
|
|
|
dpatch6:
|
|
movzx edx, word ptr [2*edx+12345678h] ; get second sample
|
|
xor edx, 8000h ; Change from signed to unsigned
|
|
movzx esi, dh ; put high byte in esi
|
|
sub dh, dh ; lo byte in edx
|
|
|
|
dec ecx ; decrement count
|
|
jnz mix16Sloop ; loop
|
|
|
|
mov _MV_MixDestination, edi ; Store the current write position
|
|
mov _MV_MixPosition, ebp ; return position
|
|
exit16S:
|
|
popad
|
|
ret
|
|
ENDP MV_Mix16BitStereo16_
|
|
|
|
ENDS
|
|
|
|
END
|