; MoonBlaster Wave modules player
DEVICE ZXSPECTRUM128
include "../_sdk/sys_h.asm"
include "playerdefs.asm"
MUSICTITLE = 0x80dc
org PLAYERSTART
begin PLAYERHEADER
isfilesupported
;cde = file extension
;out: zf=1 if this player can handle the file and the sound hardware is available, zf=0 otherwise
mwmsupported=$+1
ld a,'m'
cp c
ret nz
ld hl,'wm'
sub hl,de
ret nz
;prepare local variables
ld (MUSICTITLEADDR),hl
ld hl,musicprogress+1
ld (MUSICPROGRESSADDR),hl
jp initprogress
playerinit
;hl = GPSETTINGS
;a = player page
;out: zf=1 if init is successful, hl=init message
ld de,songdata_bank1
ld bc,3
ldir
ld ix,step_buffer
call opl4initwave
ret z
ld a,255
ld (mwmsupported),a ;writes 255 disabling the extension
ret
playerdeinit
ret
musicload
;cde = file extension
;hl = input file name
;out: zf=1 if the file is ready for playing, zf=0 otherwise
;
;First try loading wavekit with the same filename as input file.
;This allows overriding wavekit specified in MWM header without
;having the file edited.
ld (filenameaddr),hl
ld c,'.'
call findlastchar ;out: de = after last dot or start
ld hl,2
add hl,de
ld (hl),'k'
filenameaddr=$+1
ld de,0
push hl
call openstream_file
pop hl
ld (hl),'m'
or a
jr z,loadmwkdata
;didn't find wavekit, so now have to load and parse module header
ld de,(filenameaddr)
call openstream_file
or a
ret nz
ld a,(songdata_bank1)
SETPG8000
ld de,0x8000
ld hl,284
call readstream_file
call closestream_file
;check if this is a valid MWM file
ld de,0x8000
ld a,8 ;file type 8 = wave user song
call check_header
ret nz
;check if wavekit is needed
ld hl,0x8114
ld de,mwknone
ld b,8
call chk_headerlus
jr z,loadmwm
;build filename
ld hl,(filenameaddr)
ld de,0x8000
call strcopy_hltode
ld hl,0x8000
ld c,'/'
call findlastchar ;out: de = after last slash or start
ld hl,0x8114
ld b,8
filenamecopyloop
ld a,(hl)
cp ' '
jr z,donefilenamecopy
ld (de),a
inc hl
inc de
djnz filenamecopyloop
donefilenamecopy
ex de,hl
ld (hl),'.'
inc hl
ld (hl),'m'
inc hl
ld (hl),'w'
inc hl
ld (hl),'k'
inc hl
ld (hl),0
;load wavekit
ld de,0x8000
call openstream_file
or a
ret nz
loadmwkdata
call mwkload
push af
call closestream_file
pop af
ret nz
loadmwm
ld de,(filenameaddr)
call openstream_file
or a
ret nz
call mwmload
ret nz
call closestream_file
call start_music
;set music length
ld a,(xloop)
ld c,a
ld b,0
cp 255
ld a,(xleng)
jr nc,noloopinmusic
;the loop is played one additional time
ld l,a
ld h,b
add hl,hl
sbc hl,bc
ld a,l
srl h
noloopinmusic
rra
adc a,b
call setprogressdelta
;make title avaialable
ld hl,MUSICTITLE
ld (MUSICTITLEADDR),hl
;null terminate string
xor a
ld (MUSICTITLE+50),a
;init progress vars
ld (lastplaypos),a
ld (loopcounter),a
ld hl,0
ld (playposacc),hl
ret
musicunload
jp stop_music
musicplay
;out: zf=0 if still playing, zf=1 otherwise
ld a,(play_busy)
or a
ret z
in a,(MOON_STAT)
rlca
jr nc,$-3
call play_int
;update progress
lastplaypos=$+1
ld b,0
ld a,(play_pos)
ld (lastplaypos),a
sub b
jr z,playposunchanged
jr nc,loopwasnotencountered
ld hl,xleng
add a,(hl)
ld hl,xloop
sub (hl)
ld hl,loopcounter
inc (hl)
loopwasnotencountered
playposacc=$+1
ld hl,0
ld c,a
ld b,0
add hl,bc
ld (playposacc),hl
ld a,l
srl h
rra
call updateprogress
playposunchanged
ld a,(play_busy)
or a
ret z
loopcounter=$+1
ld a,0
cp 2 ;repeat the loop once
sbc a,a
ret
strcopy_hltode
ld a,(hl)
ld (de),a
or a
ret z
inc hl
inc de
jr strcopy_hltode
;c = character
;hl = poi to filename in string
;out: de = after last dot or start
findlastchar
ld d,h
ld e,l ;de = after last char
findlastchar0
ld a,(hl)
inc hl
or a
ret z
cp c
jr nz,findlastchar0
jr findlastchar
load_file
push de
push ix
call readstream_file
pop ix
pop de
ret
selbank_FE
SETPG8000
ret
include "../_sdk/file.asm"
include "common/opl4utils.asm"
include "mbwave/basic.asm"
include "progress.asm"
mwknone
db "NONE "
playernamestr
db "Moonblaster Wave Replayer",0
end
savebin "mwm.bin",begin,end-begin