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Use some of the unused space of synth object for curvoices.

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This commit is contained in:
Veikko Sariola
2020-05-24 00:45:59 +03:00
parent 457c1fdc32
commit 2c6f4f44d5
2 changed files with 7 additions and 19 deletions
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24
src/player.asm
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@ -18,13 +18,6 @@
%endmacro
%endif
%ifdef INCLUDE_MULTIVOICE_TRACKS
struc trackarray
.curvoices resd MAX_TRACKS
.size
endstruc
%endif
struc su_playerstack ; the structure of stack _as the output sound sees it_
.rowtick RESPTR 1 ; which tick within this row are we at
.row RESPTR 1 ; which total row of the song are we at
@ -32,7 +25,6 @@ struc su_playerstack ; the structure of stack _as the output sound sees it_
.randseed RESPTR 1
%ifdef INCLUDE_MULTIVOICE_TRACKS
.trackbits RESPTR 1
.trackarray resb trackarray.size
%endif
.cleanup
%if BITS == 32
@ -141,11 +133,7 @@ EXPORT MANGLE_FUNC(su_render,PTRSIZE) ; Stack: ptr
call su_gmdls_load
%endif
xor eax, eax
%ifdef INCLUDE_MULTIVOICE_TRACKS ; TODO: it's nice to keep the curvoices in stack but it's very unnice having to clear them ourselves
sub _SP, trackarray.size; reserve space from stack for the current voiceno
mov _DI, _SP
mov ecx, trackarray.size/4
rep stosd
%ifdef INCLUDE_MULTIVOICE_TRACKS
push VOICETRACK_BITMASK
%endif
push 1 ; randseed
@ -201,7 +189,7 @@ su_update_voices: ; Stack: retaddr row
apply {lea _SI,},MANGLE_DATA(su_tracks),_AX,{} ; esi points to the pattern data for current track
xor eax, eax ; eax is the first voice of next track
xor ebx, ebx ; ebx is the first voice of current track
lea _BP, [_SP + su_playerstack.trackarray] ; ebp points to the current_voiceno array
mov _BP, PTRWORD su_synth_obj ; ebp points to the current_voiceno array
su_update_voices_trackloop:
movzx eax, byte [_SI] ; eax = current pattern
imul eax, PATTERN_SIZE ; eax = offset to current pattern data
@ -217,7 +205,7 @@ su_calculate_voices_loop: ; do {
push _CX ; Stack: next_instr ptrnrow
cmp al, HLD ; anything but hold causes action
je short su_update_voices_nexttrack
mov ecx, dword [_BP]
mov cl, byte [_BP]
mov edi, ecx
add edi, ebx
shl edi, MAX_UNITS_SHIFT + 6 ; each unit = 64 bytes and there are 1<<MAX_UNITS_SHIFT units + small header
@ -229,7 +217,7 @@ su_calculate_voices_loop: ; do {
jl su_update_voices_skipreset
xor ecx,ecx ; curvoice = 0
su_update_voices_skipreset:
mov dword [_BP],ecx
mov byte [_BP],cl
add ecx, ebx
shl ecx, MAX_UNITS_SHIFT + 6 ; each unit = 64 bytes and there are 1<<MAX_UNITS_SHIFT units + small header
apply {lea _DI,},su_synth_obj+su_synth.voices,_CX,{}
@ -241,8 +229,8 @@ su_update_voices_nexttrack:
pop _BX ; ebx=first voice of next instrument, Stack: ptrnrow
pop _DX ; edx=patrnrow
add _SI, MAX_PATTERNS
add _BP, 4
lea _AX, [_SP + su_playerstack.trackarray + MAX_TRACKS*4]
inc _BP
apply {lea _AX,},su_synth_obj,MAX_TRACKS,{}
cmp _BP,_AX
jl su_update_voices_trackloop
ret

2
src/sointu.inc
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@ -246,7 +246,7 @@ endstruc
; synth struct
;-------------------------------------------------------------------------------
struc su_synth
.reserved resd 8 ; this is so that left/right/aux ports are aligned to the input ports of units
.curvoices resb 32 ; these are used by the multitrack player to store which voice is playing on which track
.left resd 1
.right resd 1
.aux resd 6 ; 3 auxiliary signals