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dsio.asm
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dsio.asm
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;----------------------------------------------------------------------------
;
; E L I T E G R O U P
; we are very good.
;
; -> DirectSound output code
;
;---------------------------------------------------------------- ------------
SECTION .bss
%include "win32.inc"
%include "dsound.inc"
%define BUFFERLEN 10000h
struc dsdata
.sbuf resd 1 ; ptr to the secondary IDirectSoundBuffer
.pbuf resd 1 ; ptr to the primary IDirectSoundBuffer
.dssd resd 1 ; ptr to the IDirectSound instance
.callback resd 1 ; ptr to the callback function
.cbparm resd 1 ; parm of the callback function
.vol resd 1 ; float: vol
.exitreq resd 1 ; exit request flag for sound thread
.thndl resd 1 ; handle of sound thread
.buf1 resd 1 ; 1st locked buffer address for streaming
.len1 resd 1 ; length of 1st buffer
.buf2 resd 1 ; 2nd locked buffer address for streaming
.len2 resd 1 ; length of 2nd buffer
.towrite resd 1 ; bytes to write
.curpos resd 1 ; current read position on buffer
.lastpos resd 1 ; last write position in buffer
.dummy resd 1 ; dummy dword for thread ID
.tickev resd 1 ; handle for tick event
.cb1 resd 1 ; clamp val 1
.crsec resb 24 ; critical section
.gppos resd 2 ; pos 2
.bufcnt resd 1 ; filled buffer count
.ltg resd 1 ; last time got
.tempwfx resb WAVEFORMATEX.size
.mixbuffer resb 2*BUFFERLEN ; 32bit stereo mixing buffer
.size
endstruc
extern _CreateThread@24
extern _WaitForSingleObject@8
extern _SetThreadPriority@8
extern _InitializeCriticalSection@4
extern _EnterCriticalSection@4
extern _LeaveCriticalSection@4
extern _DeleteCriticalSection@4
extern _DirectSoundCreate@12
extern _CreateEventA@16
extern _CloseHandle@4
extern _SetEvent@4
global _dsInit@12
global _dsClose@0
global _dsGetCurSmp@0
global _dsSetVolume@4
global _dsTick@0
global _dsLock@0
global _dsUnlock@0
globdat: resb dsdata.size
section .drectve info
db "/defaultlib:dsound.lib "
db "/defaultlib:user32.lib "
db "/defaultlib:kernel32.lib "
db 0
SECTION .text
fc32768 dd 32768.0
; NEU
clamp;
pushad
shr ecx, 1
.lp
fld dword [esi]
fmul dword [ebx + dsdata.vol]
add esi, 4
xor edx, edx
fistp dword [ebx + dsdata.cb1]
mov eax, [ebx + dsdata.cb1]
mov dx, 32600
cmp eax, edx
jng .nocmax
mov eax, edx
.nocmax
neg edx
cmp eax, edx
jnl .clampend
mov eax, edx
.clampend
stosw
loop .lp
popad
ret
_dsInit@12:
pushad
mov ebx, globdat
; clear global data
mov ecx, dsdata.size
mov edi, ebx
xor eax, eax
rep stosb
mov esi, [esp+36]
mov [ebx+dsdata.callback], esi
mov esi, [esp+40]
mov [ebx+dsdata.cbparm], esi
lea esi, [ebx+dsdata.dssd]
mov [esi], eax
push eax
push esi
push eax
call _DirectSoundCreate@12
mov esi, [esi]
or esi, esi
jz .initfailgate
; set DSound cooperative level
mov al, DSSCL_PRIORITY
push eax
push dword [esp + 48] ; second parm (hwnd)
push esi
mov edi, [esi] ; edx = vtbl
call [edi + DirectSound8.SetCooperativeLevel]
or eax, eax
jnz .initfailgate
; obtain primary buffer
push eax
lea ebp, [ebx + dsdata.pbuf]
push ebp
push dword primdesc
push esi
call [edi + DirectSound8.CreateSoundBuffer]
or eax, eax
.initfailgate:
jnz .gate2
; obtain secondary buffer
push eax
lea edx, [ebx + dsdata.sbuf]
push edx
push dword streamdesc
push esi
call [edi + DirectSound8.CreateSoundBuffer]
or eax, eax
.gate2
jnz near .InitFailed
; set primary buffer format
lea edi, [ebx + dsdata.tempwfx]
push edi
lea esi, [wfxprimary]
lea ecx, [eax + WAVEFORMATEX.size]
rep movsb
mov esi, [ebp]
push esi
mov edi, [esi] ; edx = vtbl
call [edi + DirectSoundBuffer8.SetFormat]
; lock, clear and unlock secondary buffer
xor esi,esi
push dword DSBLOCK_ENTIREBUFFER
lea edx, [ebx + dsdata.len2]
push edx
lea edx, [ebx + dsdata.buf2]
push edx
lea edx, [ebx + dsdata.len1]
push edx
lea edx, [ebx + dsdata.buf1]
push edx
push esi
push esi
mov ebp, [ebx + dsdata.sbuf]
mov esi, [ebp] ; vtbl
push ebp
call [esi + DirectSoundBuffer8.Lock]
or eax, eax
jnz .gate2
mov ecx, [ebx + dsdata.len1]
mov edi, [ebx + dsdata.buf1]
rep stosb
mov ecx, [ebx + dsdata.len2]
mov edi, [ebx + dsdata.buf2]
rep stosb
push dword [ebx + dsdata.len2]
push dword [ebx + dsdata.buf2]
push dword [ebx + dsdata.len1]
push dword [ebx + dsdata.buf1]
push ebp
call [esi + DirectSoundBuffer8.Unlock]
or eax, eax
jnz .InitFailed
mov [ebx + dsdata.bufcnt], dword -BUFFERLEN
mov [ebx + dsdata.ltg], dword -BUFFERLEN
; tick event init
xor eax,eax
push eax
push eax
push eax
push eax
call _CreateEventA@16
mov [ebx + dsdata.tickev], eax
; critical section init...
lea eax, [ebx + dsdata.crsec]
push eax
call _InitializeCriticalSection@4
; activate the streaming buffer
xor eax,eax
inc al
push eax
push dword DSBPLAY_LOOPING
dec al
push eax
push eax
push ebp
call [esi + DirectSoundBuffer8.Play]
or eax, eax
jnz .InitFailed
; volume control init...
fld dword [fc32768]
fstp dword [ebx + dsdata.vol]
; start sound thread
lea edx, [ebx + dsdata.dummy]
push edx
push eax
push eax
push dword threadfunc
push eax
push eax
call _CreateThread@24
mov [ebx + dsdata.thndl], eax
inc dword [esp] ; <- THREAD_PRIORITY_HIGHER
push eax
call _SetThreadPriority@8
; ok, everything's done
popad
stc
jmp short .initends
.InitFailed ; oh no, we've encountered an error!
call _dsClose@0
popad
clc
.initends
sbb eax,eax
ret 0ch
_dsClose@0:
pushad
mov ebx, globdat
; set exit request..
inc dword [ebx + dsdata.exitreq]
mov eax, [ebx + dsdata.thndl]
or eax, eax
jz .NoThread
; give the thread a chance to finish
push dword 1000
push eax
call _WaitForSingleObject@8
.NoThread:
;tick event release
mov eax, [ebx + dsdata.tickev]
push eax
call _CloseHandle@4
; critical section release...
lea eax, [ebx + dsdata.crsec]
push eax
call _DeleteCriticalSection@4
; remove allocated instances
mov edi, .ReleaseComObj
xchg esi, ebx
lodsd
call edi
lodsd
call edi
lodsd
db 0b1h ; 31337 untergrund trick!
.ReleaseComObj:
pushad
or eax, eax
jz .endRelease
mov edx, [eax]
push eax
call [edx+DirectSound8.Release]
.endRelease
popad
ret
threadfunc:
pushad
mov ebx, globdat
.looping:
; check for exit request
cmp byte [ebx + dsdata.exitreq], 0
je .loopok
popad
xor eax,eax
ret 4h
.loopok:
xor ebp,ebp
lea edx,[ebp+(BUFFERLEN/3000)]
push edx
push dword [ebx + dsdata.tickev]
call _WaitForSingleObject@8
mov [ebx + dsdata.buf1], ebp
mov [ebx + dsdata.buf2], ebp
lea eax, [ebx + dsdata.crsec]
push eax
call _EnterCriticalSection@4
.lockLoop:
; fetch current buffer position
xor eax, eax
push eax
lea eax, [ebx + dsdata.curpos]
push eax
mov ebp, [ebx + dsdata.sbuf]
push ebp
mov edx, [ebp] ; vtbl
call [edx + DirectSoundBuffer8.GetCurrentPosition]
cmp eax, 88780096h
je .tryRestore
; find out how many bytes to write
mov eax, [ebx + dsdata.curpos]
and eax, ~1fh
mov ecx, eax
sub eax, [ebx + dsdata.lastpos]
jnz .fast
jmp .after
.fast
jns .ja
add eax, BUFFERLEN
.ja:
mov edi, eax
add [ebx + dsdata.bufcnt], eax
; try to lock the buffer
xor esi,esi
push esi
lea edx, [ebx + dsdata.len2]
push edx
lea edx, [ebx + dsdata.buf2]
push edx
lea edx, [ebx + dsdata.len1]
push edx
lea edx, [ebx + dsdata.buf1]
push edx
push eax
push dword [ebx + dsdata.lastpos]
mov [ebx + dsdata.lastpos],ecx
mov edx, [ebp] ; vtbl
push ebp
call [edx + DirectSoundBuffer8.Lock]
cmp eax, 88780096h; DSERR_BUFFERLOST
jne .lockOK
.tryRestore:
mov edx, [ebp] ; vtbl
push ebp
call [edx + DirectSoundBuffer8.Restore]
jmp .lockLoop
.lockOK:
mov eax, edi
shr eax, 2
push eax
lea edi, [ebx + dsdata.mixbuffer]
push edi
push dword [ebx + dsdata.cbparm]
call [ebx + dsdata.callback]
mov esi, edi
push ebp
mov ebp, clamp
; check buffer one
mov edi, [ebx + dsdata.buf1]
or edi, edi
jz .nobuf1
mov ecx, [ebx + dsdata.len1]
call ebp
shl ecx, 1
add esi, ecx
.nobuf1:
; check buffer two
mov edi, [ebx + dsdata.buf2]
or edi, edi
jz .nobuf2
mov ecx, [ebx + dsdata.len2]
call ebp
.nobuf2:
fstp st0
pop ebp
push dword [ebx + dsdata.len2]
push dword [ebx + dsdata.buf2]
push dword [ebx + dsdata.len1]
push dword [ebx + dsdata.buf1]
push ebp
mov esi, [ebp] ; vtbl
call [esi + DirectSoundBuffer8.Unlock]
.after
lea eax, [ebx + dsdata.crsec]
push eax
call _LeaveCriticalSection@4
jmp .looping
_dsGetCurSmp@0:
push ebx
push ebp
mov ebx, globdat
lea eax, [ebx + dsdata.crsec]
push eax
call _EnterCriticalSection@4
; fetch current buffer position
xor eax, eax
push eax
lea eax, [ebx + dsdata.gppos]
push eax
mov ebp, [ebx + dsdata.sbuf]
push ebp
mov edx, [ebp] ; vtbl
call [edx + DirectSoundBuffer8.GetCurrentPosition]
lea eax, [ebx + dsdata.crsec]
push eax
call _LeaveCriticalSection@4
mov eax, [ebx+dsdata.gppos]
sub eax, [ebx+dsdata.lastpos]
jns .noadd
add eax, BUFFERLEN
.noadd
; WORKAROUNDMANIE!
cmp eax, BUFFERLEN/4
jl .isgut
mov eax, [ebx+dsdata.ltg]
sub eax, [ebx+dsdata.bufcnt]
.isgut
add eax, [ebx+dsdata.bufcnt]
mov [ebx+dsdata.ltg], eax
pop ebp
pop ebx
ret
_dsSetVolume@4:
push ebx
mov ebx, globdat
fld dword [esp+8]
fmul dword [fc32768]
fstp dword [ebx + dsdata.vol]
pop ebx
ret 4
_dsTick@0:
push ebx
mov ebx, globdat
push dword [ebx + dsdata.tickev]
call _SetEvent@4
pop ebx
ret
_dsLock@0:
push ebx
mov ebx, globdat
lea eax, [ebx + dsdata.crsec]
push eax
call _EnterCriticalSection@4
pop ebx
ret
_dsUnlock@0:
push ebx
mov ebx, globdat
lea eax, [ebx + dsdata.crsec]
push eax
call _LeaveCriticalSection@4
pop ebx
ret
wfxprimary:
dw 1 ; wFormatTag: WAVEFORMAT_PCM
dw 2 ; nChannels
dd 44100 ; nSamplesPerSec: 44100
dd 176400 ; nAvgBytesPerSec
dw 4 ; nBlockAlign
dw 16 ; wBitsPerSample
dw 0 ; cbSize
streamdesc:
dd streamdesc.size-streamdesc
dd DSBCAPS_GETCURRENTPOSITION2|DSBCAPS_GLOBALFOCUS
dd BUFFERLEN ; dwBufferBytes
dd 0 ; dwReserved
dd wfxprimary ; lpwfxFormat
.size
primdesc:
dd primdesc.size-primdesc
dd DSBCAPS_PRIMARYBUFFER
dd 0
dd 0
dd 0
.size