forked from KolibriOS/kolibrios
226 lines
5.5 KiB
NASM
226 lines
5.5 KiB
NASM
; MINI.ASM
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; --------
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; Minimalistic uFMOD usage example.
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; Shows how to play an XM track in memory,
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; including proper error handling.
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BITS 32
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org 0
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db "MENUET01"
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dd 1
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dd START ; Entry point
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dd uFMOD_IMG_END ; End of code and initialized data
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dd MEMORY_END ; End of uninitialized (BSS) data
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dd STACK_B ; Bottom of the stack
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dd 0 ; Args
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dd 0 ; Reserved
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; uFMOD setup:
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%define f48000 ; Set sampling rate to 48KHz (22050, 44100, 48000)
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%define STRONG ; Select STRONG interpolation (NONE, WEAK, STRONG)
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%define UNSAFE ; Select UNSAFE mode (NORMAL, UNSAFE)
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%define NODEBUG ; Skip debug-board messages
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%define NOLINKER ; Select "no linker" mode
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; uFMOD constants:
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%define uFMOD_MIN_VOL 0
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%define uFMOD_MAX_VOL 25
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%define uFMOD_DEFAULT_VOL 25
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; The XM track.
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xm incbin "..\ufmodlib\media\mini.xm"
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xm_length equ $ - xm
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; Optimization:
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; This header file is suitable for mini.xm track only!
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; If you change the track, update the optimization header.
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; (Use the standart eff.inc file for a general purpose player app.)
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%include "..\ufmodlib\media\mini.eff.inc"
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; UI text messages.
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msg_txt db "uFMOD ruleZ!"
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msg_txt_l equ $ - msg_txt
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msg_cap db "NASM",0
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err_txt db "Error"
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err_txt_l equ $ - err_txt
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err_cap db ":-(",0
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START:
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; Start playback.
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push XM_MEMORY
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push xm_length
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push xm
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call _uFMOD_LoadSong
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; Stack fixing is required here, but in this simple
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; example leaving ESP as it is won't harm. In a real
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; application you should uncomment the following line:
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; add esp,12
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test eax,eax
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jz error
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; Wait for user input.
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push _uFMOD_WaveOut ; cbProc <- continue fetching data!
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push msg_txt_l ; cbString
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push msg_txt ; lpString
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push msg_cap ; szCap
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call _MessageBoxCB
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; add esp,16
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; Stop playback.
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call _uFMOD_StopSong
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r: ; Exit.
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xor eax,eax
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dec eax
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int 40h
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error:
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push 0 ; cbProc <- no callback
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push err_txt_l ; cbString
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push err_txt ; lpString
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push err_cap ; szCap
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call _MessageBoxCB
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; add esp,16
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jmp r
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; ---------------------------------------------------------------
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; void _cdecl _MessageBoxCB(szCap, lpString, cbString, cbProc);
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; ---------------------------------------------------------------
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; This is similar to a Win32 MessageBox. The box is centered
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; on screen. It contains a single-line text message and an
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; "OK" button. This function returns when user closes the
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; box (via the X button or via the OK button). An optional
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; callback subroutine may be specified to be called when no
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; events are pending in the event queue.
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; NOTE: Doesn't work if you already have defined a window
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; in the current process! Doesn't modify the event mask. So,
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; make sure keyboard events are enabled before calling this
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; function. This function doesn't check the validity of the
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; supplied parameters!
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; Parameters:
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; szCap - A pointer to the ASCIIz string containing the
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; caption. A trailing zero char IS required.
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; lpString - A pointer to an ASCII string containing a single
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; line message to pop up in the box. No trailing
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; zero char is required.
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; cbString - number of characters in string.
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; cbProc - Address of the callback subroutine. Can be NULL.
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sOK db "OK"
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_MessageBoxCB:
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push ebp
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push esi
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push edi
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push ebx
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xor ebp,ebp ; global 0
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mov esi,[esp+28] ; cbString
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mov edi,[esp+20] ; szCap
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; Get screen metrics.
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lea eax,[ebp+14]
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int 40h
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mov ecx,eax
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movzx eax,ax
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shr ecx,16 ; screen w
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xchg eax,edx ; screen h
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lea ebx,[esi*2+esi]
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lea ebx,[ebx*2+28] ; w = string len * 6 + 28
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sub ecx,ebx
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shr ecx,1
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shl ecx,16
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or ebx,ecx
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lea ecx,[ebp+52h] ; h = 52h
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sub edx,ecx
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shr edx,1
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shl edx,16
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or ecx,edx ; y = (screen h - window h) / 2
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mov edx,ebx ; x = (screen w - window w) / 2
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_MessageBoxCB_redraw:
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; Start redraw.
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push edx
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lea eax,[ebp+12]
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lea ebx,[ebp+1]
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int 40h
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; Define and draw window.
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xor eax,eax
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mov ebx,edx ; x, w (ECX: y, h)
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mov edx,34C0C0C0h ; style and BG color
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int 40h
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; Define the OK button.
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push esi
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lea eax,[ebp+8]
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sub ebx,28+0Ah
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shr bx,1
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shl ebx,16 ; x = (window w - button w) / 2
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mov bx,18+0Ah ; w = 18 + 0Ah
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mov ecx,001C0012h ; y = 1Ch, h = 12h
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lea edx,[ebp+1] ; ID = close
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mov esi,0C0C0C0h ; color
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int 40h
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; Draw the OK label.
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lea eax,[ebp+4]
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add ebx,90000h ; x = button x + 9
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mov bx,22h ; y = 22h
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xor ecx,ecx ; style, font and color
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mov edx,sOK ; string
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lea esi,[ebp+2] ; length
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int 40h
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pop esi
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; Draw text string.
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lea eax,[ebp+4]
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mov ebx,000A000Ah ; x = 0Ah, y = 0Ah
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xor ecx,ecx ; style, font and color
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mov edx,[esp+28] ; lpString
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int 40h
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; End redraw.
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lea eax,[ebp+12]
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lea ebx,[ebp+2]
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int 40h
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_MessageBoxCB_eventloop:
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mov edx,[esp+36] ; cbProc
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test edx,edx
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lea eax,[ebp+10]
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jz _MessageBoxCB_peekevent
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; Invoke the callback.
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call edx
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lea eax,[ebp+23]
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lea ebx,[ebp+10] ; wait for at most 0.1 sec
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_MessageBoxCB_peekevent:
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int 40h
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dec eax
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js _MessageBoxCB_eventloop
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pop edx
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jz _MessageBoxCB_redraw
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pop ebx
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pop edi
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pop esi
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pop ebp
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ret
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; Include the whole uFMOD sources here. (Right after
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; your main code to avoid naming conflicts, but still
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; inside your code section.)
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%include "nasm.asm"
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alignb 4
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resb 1020
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STACK_B resd 1 ; Stack bottom
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MEMORY_END: ; End of uninitialized (BSS) data
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