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playwav3.s
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playwav3.s
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; ****************************************************************************
; playwav3.s (for TRDOS 386)
; ----------------------------------------------------------------------------
; PLAYWAV3.PRG ! AC'97 (ICH) .WAV PLAYER program by Erdogan TAN
;
; 28/05/2017
;
; [ Last Modification: 17/06/2017 ]
;
; Modified from PLAYWAV2.PRG .wav player program by Erdogan Tan, 27/05/2017
;
; Assembler: NASM version 2.11
; nasm playwav3.s -l playwav3.txt -o PLAYWAV3.PRG
; ----------------------------------------------------------------------------
; Derived from '.wav file player for DOS' Jeff Leyda, Sep 02, 2002
; CODE
; 01/03/2017
; 16/10/2016
; 29/04/2016
; TRDOS 386 system calls (temporary list!)
_ver equ 0
_exit equ 1
_fork equ 2
_read equ 3
_write equ 4
_open equ 5
_close equ 6
_wait equ 7
_creat equ 8
_link equ 9
_unlink equ 10
_exec equ 11
_chdir equ 12
_time equ 13
_mkdir equ 14
_chmod equ 15
_chown equ 16
_break equ 17
_stat equ 18
_seek equ 19
_tell equ 20
_mount equ 21
_umount equ 22
_setuid equ 23
_getuid equ 24
_stime equ 25
_quit equ 26
_intr equ 27
_fstat equ 28
_emt equ 29
_mdate equ 30
_video equ 31
_audio equ 32
_timer equ 33
_sleep equ 34
_msg equ 35
_geterr equ 36
_fpsave equ 37
_pri equ 38
_rele equ 39
_fff equ 40
_fnf equ 41
_alloc equ 42
_dalloc equ 43
_calbac equ 44
%macro sys 1-4
; 29/04/2016 - TRDOS 386 (TRDOS v2.0)
; 03/09/2015
; 13/04/2015
; Retro UNIX 386 v1 system call.
%if %0 >= 2
mov ebx, %2
%if %0 >= 3
mov ecx, %3
%if %0 = 4
mov edx, %4
%endif
%endif
%endif
mov eax, %1
;int 30h
int 40h ; TRDOS 386 (TRDOS v2.0)
%endmacro
; TRDOS 386 (and Retro UNIX 386 v1) system call format:
; sys systemcall (eax) <arg1 (ebx)>, <arg2 (ecx)>, <arg3 (edx)>
BUFFERSIZE equ 32768 ; audio buffer size
ENDOFFILE equ 1 ; flag for knowing end of file
[BITS 32]
[ORG 0]
_STARTUP:
; Prints the Credits Text.
sys _msg, Credits, 255, 0Bh
; clear bss
mov ecx, bss_end
mov edi, bss_start
sub ecx, edi
shr ecx, 1
xor eax, eax
rep stosw
; Detect (& Enable) AC'97 Audio Device
call DetectAC97
jnc short GetFileName
_dev_not_ready:
; couldn't find the audio device!
sys _msg, noDevMsg, 255, 0Fh
jmp Exit
GetFileName:
mov esi, esp
lodsd
cmp eax, 2 ; two arguments
; (program file name & mod file name)
jb pmsg_usage ; nothing to do
lodsd ; program file name address
lodsd ; mod file name address (file to be read)
mov esi, eax
mov edi, wav_file_name
ScanName:
lodsb
test al, al
je pmsg_usage
cmp al, 20h
je short ScanName ; scan start of name.
stosb
mov ah, 0FFh
a_0:
inc ah
a_1:
lodsb
stosb
cmp al, '.'
je short a_0
and al, al
jnz short a_1
or ah, ah ; if period NOT found,
jnz short _1 ; then add a .WAV extension.
SetExt:
dec edi
mov dword [edi], '.WAV'
mov byte [edi+4], 0
_1:
; Allocate Audio Buffer (for user)
sys _audio, 0200h, BUFFERSIZE, audio_buffer
jnc short _2
error_exit:
sys _msg, trdos386_err_msg, 255, 0Eh
jmp Exit
_2:
; DIRECT CGA (TEXT MODE) MEMORY ACCESS
; bl = 0, bh = 4
; Direct access/map to CGA (Text) memory (0B8000h)
sys _video, 0400h
cmp eax, 0B8000h
jne short error_exit
; Initialize Audio Device (bh = 3)
sys _audio, 0301h, 0, audio_int_handler
; jc short error_exit
_3:
call write_audio_dev_info
; open the file
; open existing file
call openFile ; no error? ok.
jnc short _gsr
; file not found!
sys _msg, noFileErrMsg, 255, 0Fh
jmp Exit
_gsr:
call getSampleRate ; read the sample rate
; pass it onto codec.
jc Exit
mov [sample_rate], ax
mov [stmo], cl
mov [bps], dl
; 06/06/2017
sys _audio, 0E00h ; get audio controller info
jc error_exit
;cmp ah, 2 ; ICH ? (Intel AC'97 Audio Controller)
;jne _dev_not_ready
; EAX = IRQ Number in AL
; Audio Device Number in AH
; EBX = DEV/VENDOR ID
; (DDDDDDDDDDDDDDDDVVVVVVVVVVVVVVVV)
; ECX = BUS/DEV/FN
; (00000000BBBBBBBBDDDDDFFF00000000)
; EDX = NABMBAR/NAMBAR (for AC97)
; (Low word, DX = NAMBAR address)
; EDX = Base IO Addr (DX) for SB16 & VT8233
mov [ac97_int_ln_reg], al
mov [dev_vendor], ebx
mov [bus_dev_fn], ecx
;mov [ac97_NamBar], dx
;shr dx, 16
;mov [ac97_NabmBar], dx
mov [ac97_NamBar], edx
call write_ac97_pci_dev_info
; 01/05/2017
call write_wav_file_info
PlayNow:
;
; position file pointer to start in actual wav data
; MUCH improvement should really be done here to check if sample size is
; supported, make sure there are 2 channels, etc.
;
;mov ah, 42h
;mov al, 0 ; from start of file
;mov bx, [FileHandle]
;xor cx, cx
;mov dx, 44 ; jump past .wav/riff header
;int 21h
sys _seek, [FileHandle], 44, 0
sys _msg, nextline, 255, 07h ; 01/05/2017
; 13/06/2017
;mov byte [factor], 0
cmp byte [bps], 16
je short _set_factor_0
inc byte [factor] ; 1
_set_factor_0:
cmp byte [stmo], 2
je short _set_factor_1
add byte [factor], 2 ; 2 or 3
_set_factor_1:
; play the .wav file. Most of the good stuff is in here.
call PlayWav
; close the .wav file and exit.
StopPlaying:
; Stop Playing
sys _audio, 0700h
; Cancel callback service (for user)
sys _audio, 0900h
; Deallocate Audio Buffer (for user)
sys _audio, 0A00h
; Disable Audio Device
sys _audio, 0C00h
Exit:
call closeFile
sys _exit ; Bye!
here:
jmp short here
pmsg_usage:
sys _msg, msg_usage, 255, 0Bh
jmp short Exit
DetectAC97:
; Detect (BH=1) AC'97 (BL=2) Audio Device
sys _audio, 0102h
retn
;open or create file
;
;input: ds:dx-->filename (asciiz)
; al=file Mode (create or open)
;output: none cs:[FileHandle] filled
;
openFile:
;mov ah, 3Bh ; start with a mode
;add ah, al ; add in create or open mode
;xor cx, cx
;int 21h
;jc short _of1
;;mov [cs:FileHandle], ax
sys _open, wav_file_name, 0
jc short _of1
mov [FileHandle], eax
_of1:
retn
; close the currently open file
; input: none, uses cs:[FileHandle]
closeFile:
cmp dword [FileHandle], -1
je short _cf1
;mov bx, [FileHandle]
;mov ax, 3E00h
;int 21h ;close file
sys _close, [FileHandle]
mov dword [FileHandle], -1
_cf1:
retn
getSampleRate:
; reads the sample rate from the .wav file.
; entry: none - assumes file is already open
; exit: ax = sample rate (11025, 22050, 44100, 48000)
; cx = number of channels (mono=1, stereo=2)
; dx = bits per sample (8, 16)
push ebx
;mov ah, 42h
;mov al, 0 ; from start of file
;mov bx, [FileHandle]
;xor cx, cx
;mov dx, 08h ; "WAVE"
;int 21h
sys _seek, [FileHandle], 8, 0
;mov dx, smpRBuff
;mov cx, 28 ; 28 bytes
;mov ah, 3fh
;int 21h
sys _read, [FileHandle], smpRBuff, 28
cmp dword [smpRBuff], 'WAVE'
jne short gsr_stc
cmp word [smpRBuff+12], 1 ; Offset 20, must be 1 (= PCM)
jne short gsr_stc
mov cx, [smpRBuff+14] ; return num of channels in CX
mov ax, [smpRBuff+16] ; return sample rate in AX
mov dx, [smpRBuff+26] ; return bits per sample value in DX
gsr_retn:
pop ebx
retn
gsr_stc:
stc
jmp short gsr_retn
audio_int_handler:
mov byte [srb], 1 ; interrupt (or signal response byte)
cmp byte [cbs_busy], 1
jnb short _callback_bsy_retn
mov byte [cbs_busy], 1
mov al, [half_buff]
cmp al, 1
jb short _callback_retn
xor byte [half_buff], 3 ; 2->1, 1->2
mov ebx, 0B8000h ; video display page address
mov ah, 4Eh
add al, '0'
mov [ebx], ax ; show playing buffer (1, 2)
_callback_retn:
mov byte [cbs_busy], 0
_callback_bsy_retn:
sys _rele ; return from callback service
; we must not come here !
sys _exit
loadFromFile:
; 13/06/2017
mov edx, BUFFERSIZE
mov cl, [factor]
and cl, cl
jz short _set_factor_2
mov edi, temp_buffer
; bit 0 = 8 bit
; bit 1 = mono
add cl, 1 ; 1 -> 2, 2 -> 3, 3 -> 4
shr cl, 1 ; 4 -> 2, 3 -> 1, 2 -> 1
shr edx, cl
jmp short _set_factor_3
_set_factor_2:
; load 32768 bytes into audio buffer
; (for the first half of DMA buffer)
mov edi, audio_buffer
_set_factor_3:
; 17/03/2017
; edi = buffer address
; edx = buffer size
; 10/03/2017
;push eax
;push ecx
;push edx
;push ebx
test byte [flags], ENDOFFILE ; have we already read the
stc ; last of the file?
jnz short endLFF_retn ; 13/06/2017
;clc
; load file into memory
sys _read, [FileHandle], edi
mov ecx, edx
jc short padfill ; error !
and eax, eax
jz short padfill
sub ecx, eax
jz short endLFF
add edi, eax
padfill:
cmp byte [bps], 16
je short _5
; Minimum Value = 0
xor al, al
rep stosb
_4:
;clc ; don't exit with CY yet.
or byte [flags], ENDOFFILE ; end of file flag
endLFF:
; 17/06/2017
; 13/06/2017
; bit 0 = 8bit (1), 16bit (0)
; bit 1 = mono (1), stereo (0)
mov al, [factor]
or al, al
jz short endLFF_retn
mov esi, temp_buffer
mov edi, audio_buffer
mov ecx, BUFFERSIZE / 4
cmp al, 2
ja short _set_factor_5 ; 8 bit mono
je short _set_factor_6 ; 16 bit mono
; 8 bit stereo
_set_factor_4:
lodsb
and al, al
jnz short _set_factor_4a
mov edx, 80000000h
jmp short _set_factor_4b
_set_factor_4a:
sub al, 80h
mov dl, al
shl edx, 24
_set_factor_4b:
lodsb
or al, al
jnz short _set_factor_4c
mov dx, 8000h
jmp short _set_factor_4d
_set_factor_4c:
sub al, 80h
mov dh, al
_set_factor_4d:
mov eax, edx
stosd
loop _set_factor_4
;jmp short _set_factor_7
clc
endLFF_retn:
;pop ebx
;pop edx
;pop ecx
;pop eax
retn
_5:
; Minimum value = 8000h (-32768)
shr ecx, 1
mov ax, 8000h ; -32768
rep stosw
jmp short _4
_set_factor_5:
; 8 bit mono
lodsb
and al, al
jnz short _set_factor_5a
mov ax, 8000h
jmp short _set_factor_5b
_set_factor_5a:
sub al, 80h
mov ah, al
sub al, al
_set_factor_5b:
mov dx, ax
shl eax, 16
mov ax, dx
stosd
loop _set_factor_5
jmp short _set_factor_7
_set_factor_6:
; 16 bit mono
lodsw
mov dx, ax
shl eax, 16
mov ax, dx
stosd
loop _set_factor_6
_set_factor_7:
clc ; 13/06/2017
;pop ebx
;pop edx
;pop ecx
;pop eax
retn
PlayWav:
; 13/06/2017
; Convert 8 bit samples to 16 bit samples
; and convert mono samples to stereo samples
;mov edi, audio_buffer
;mov edx, BUFFERSIZE
call loadFromFile
jc error_exit
mov byte [half_buff], 1 ; (DMA) Buffer 1
; Set Master Volume Level (BL=0 or 80h)
; for next playing (BL>=80h)
sys _audio, 0B80h, 1D1Dh
; Start to play
mov al, [bps]
shr al, 4 ; 8 -> 0, 16 -> 1
shl al, 1 ; 16 -> 2, 8 -> 0
mov bl, [stmo]
dec bl
or bl, al
mov cx, [sample_rate]
mov bh, 4 ; start to play
sys _audio
;mov ebx, 0B8000h ; video display page address
;mov ah, 4Eh
;mov al, [half_buffer]
;mov [ebx], ax ; show playing buffer (1, 2)
;; load 32768 bytes into audio buffer
;; (for the second half of DMA buffer)
;; 20/05/2017
;mov edi, audio_buffer
;mov edx, BUFFERSIZE
;call loadFromFile
;jc short p_return
;mov byte [half_buff], 2 ; (DMA) Buffer 2
mov byte [srb], 1
p_loop:
mov ah, 1 ; any key pressed?
int 32h ; no, Loop.
jz short q_loop
mov ah, 0 ; flush key buffer...
int 32h
p_return:
mov byte [half_buff], 0
retn
q_loop:
cmp byte [srb], 0
jna short p_loop
mov byte [srb], 0
;mov edi, audio_buffer
;mov edx, BUFFERSIZE
call loadFromFile
jc short p_return
;mov byte [srb], 0
jmp short p_loop
write_audio_dev_info:
; EBX = Message address
; ECX = Max. message length (or stop on ZERO character)
; (1 to 255)
; DL = Message color (07h = light gray, 0Fh = white)
sys _msg, msgAudioCardInfo, 255, 0Fh
retn
write_wav_file_info:
; 01/05/2017
sys _msg, msgWavFileName, 255, 0Fh
sys _msg, wav_file_name, 255, 0Fh
write_sample_rate:
; 01/05/2017
mov ax, [sample_rate]
; ax = sample rate (hertz)
xor edx, edx
mov cx, 10
div cx
add [msgHertz+4], dl
sub edx, edx
div cx
add [msgHertz+3], dl
sub edx, edx
div cx
add [msgHertz+2], dl
sub edx, edx
div cx
add [msgHertz+1], dl
add [msgHertz], al
sys _msg, msgSampleRate, 255, 0Fh
mov esi, msg16Bits
cmp byte [bps], 16
je short wsr_1
mov esi, msg8Bits
wsr_1:
sys _msg, esi, 255, 0Fh
mov esi, msgMono
cmp byte [stmo], 1
je short wsr_2
mov esi, msgStereo
wsr_2:
sys _msg, esi, 255, 0Fh
retn
write_ac97_pci_dev_info:
; 06/06/2017
; 03/06/2017
; BUS/DEV/FN
; 00000000BBBBBBBBDDDDDFFF00000000
; DEV/VENDOR
; DDDDDDDDDDDDDDDDVVVVVVVVVVVVVVVV
mov esi, [dev_vendor]
mov eax, esi
movzx ebx, al
mov dl, bl
and bl, 0Fh
mov al, [ebx+hex_chars]
mov [msgVendorId+3], al
mov bl, dl
shr bl, 4
mov al, [ebx+hex_chars]
mov [msgVendorId+2], al
mov bl, ah
mov dl, bl
and bl, 0Fh
mov al, [ebx+hex_chars]
mov [msgVendorId+1], al
mov bl, dl
shr bl, 4
mov al, [ebx+hex_chars]
mov [msgVendorId], al
shr eax, 16
mov bl, al
mov dl, bl
and bl, 0Fh
mov al, [ebx+hex_chars]
mov [msgDevId+3], al
mov bl, dl
shr bl, 4
mov al, [ebx+hex_chars]
mov [msgDevId+2], al
mov bl, ah
mov dl, bl
and bl, 0Fh
mov al, [ebx+hex_chars]
mov [msgDevId+1], al
mov bl, dl
shr bl, 4
mov al, [ebx+hex_chars]
mov [msgDevId], al
mov esi, [bus_dev_fn]
shr esi, 8
mov ax, si
mov bl, al
mov dl, bl
and bl, 7 ; bit 0,1,2
mov al, [ebx+hex_chars]
mov [msgFncNo+1], al
mov bl, dl
shr bl, 3
mov dl, bl
and bl, 0Fh
mov al, [ebx+hex_chars]
mov [msgDevNo+1], al
mov bl, dl
shr bl, 4
mov al, [ebx+hex_chars]
mov [msgDevNo], al
mov bl, ah
mov dl, bl
and bl, 0Fh
mov al, [ebx+hex_chars]
mov [msgBusNo+1], al
mov bl, dl
shr bl, 4
mov al, [ebx+hex_chars]
mov [msgBusNo], al
mov ax, [ac97_NamBar]
mov bl, al
mov dl, bl
and bl, 0Fh
mov al, [ebx+hex_chars]
mov [msgNamBar+3], al
mov bl, dl
shr bl, 4
mov al, [ebx+hex_chars]
mov [msgNamBar+2], al
mov bl, ah
mov dl, bl
and bl, 0Fh
mov al, [ebx+hex_chars]
mov [msgNamBar+1], al
mov bl, dl
shr bl, 4
mov al, [ebx+hex_chars]
mov [msgNamBar], al
mov ax, [ac97_NabmBar]
mov bl, al
mov dl, bl
and bl, 0Fh
mov al, [ebx+hex_chars]
mov [msgNabmBar+3], al
mov bl, dl
shr bl, 4
mov al, [ebx+hex_chars]
mov [msgNabmBar+2], al
mov bl, ah
mov dl, bl
and bl, 0Fh
mov al, [ebx+hex_chars]
mov [msgNabmBar+1], al
mov bl, dl
shr bl, 4
mov al, [ebx+hex_chars]
mov [msgNabmBar], al
xor ah, ah
mov al, [ac97_int_ln_reg]
mov cl, 10
div cl
add [msgIRQ], ax
and al, al
jnz short _w_ac97imsg_
mov al, [msgIRQ+1]
mov ah, ' '
mov [msgIRQ], ax
_w_ac97imsg_:
sys _msg, msgAC97Info, 255, 07h
retn
; DATA
FileHandle:
dd -1
Credits:
db 'Tiny WAV Player for TRDOS 386 by Erdogan Tan. '
db 'June 2017.',10,13,0
db '17/06/2017', 10,13,0
msgAudioCardInfo:
db 'for Intel AC97 (ICH) Audio Controller.', 10,13,0
msg_usage:
db 'usage: playwav3 filename.wav',10,13,0
noDevMsg:
db 'Error: Unable to find AC97 audio device!'
db 10,13,0
noFileErrMsg:
db 'Error: file not found.',10,13,0
trdos386_err_msg:
db 'TRDOS 386 System call error !',10,13,0
msgWavFileName: db 0Dh, 0Ah, "WAV File Name: ",0
msgSampleRate: db 0Dh, 0Ah, "Sample Rate: "
msgHertz: db "00000 Hz, ", 0
msg8Bits: db "8 bits, ", 0
msgMono: db "Mono", 0Dh, 0Ah, 0
msg16Bits: db "16 bits, ", 0
msgStereo: db "Stereo"
nextline: db 0Dh, 0Ah, 0
; 03/06/2017
hex_chars db "0123456789ABCDEF", 0
msgAC97Info db 0Dh, 0Ah
db "AC97 Audio Controller & Codec Info", 0Dh, 0Ah
db "Vendor ID: "
msgVendorId db "0000h Device ID: "
msgDevId db "0000h", 0Dh, 0Ah
db "Bus: "
msgBusNo db "00h Device: "
msgDevNo db "00h Function: "
msgFncNo db "00h"
db 0Dh, 0Ah
db "NAMBAR: "
msgNamBar db "0000h "
db "NABMBAR: "
msgNabmBar db "0000h IRQ: "
msgIRQ dw 3030h
db 0Dh, 0Ah, 0
EOF:
; BSS
bss_start:
ABSOLUTE bss_start
alignb 4
stmo: resb 1 ; stereo or mono (1=stereo)
bps: resb 1 ; bits per sample (8,16)
sample_rate: resw 1 ; Sample Frequency (Hz)
cbs_busy: resb 1
half_buff: resb 1
flags: resb 1
srb: resb 1
smpRBuff: resw 14
wav_file_name:
resb 80 ; wave file, path name (<= 80 bytes)
resw 1
ac97_int_ln_reg: resb 1
factor: resb 1 ; 13/06/2017
dev_vendor: resd 1
bus_dev_fn: resd 1
ac97_NamBar: resw 1
ac97_NabmBar: resw 1
bss_end:
alignb 4096
audio_buffer: resb BUFFERSIZE ; DMA Buffer Size / 2 (32768)
; 13/06/2017
temp_buffer: resb BUFFERSIZE