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Change the sointu.h api to return -1, 0 or n>0 depending if buffer is full and/or row ended.

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test_render_samples_api.c was added to test the api. bridge.go was modified to reflect that there is no need to check for row manually; su_render_samples already returns the information if a row has ended.
This commit is contained in:
Veikko Sariola
2020-10-24 13:00:08 +03:00
parent c9e8000c5f
commit 6e85ff674a
7 changed files with 158 additions and 38 deletions
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19
src/sointu.asm
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@ -66,7 +66,11 @@ EXPORT MANGLE_FUNC(su_render_samples,12)
mov eax, [_CX + su_synth_state.rowlen]
push _AX ; push the rowlength to stack so we can easily compare to it, normally this would be row
mov eax, [_CX + su_synth_state.rowtick]
su_render_samples_loop:
su_render_samples_loop:
cmp eax, [_SP] ; compare current tick to rowlength
jge su_render_samples_row_advance
sub dword [_SP + PTRSIZE*5], 1 ; compare current tick to rowlength
jb su_render_samples_buffer_full
mov _CX, [_SP + PTRSIZE*3]
push _AX ; push rowtick
mov eax, [_CX + su_synth_state.polyphony]
@ -93,12 +97,11 @@ su_render_samples_loop:
stosd ; clear right channel so the VM is ready to write them again
pop _AX
inc dword [_SP + PTRSIZE] ; increment global time, used by delays
inc eax
dec dword [_SP + PTRSIZE*5]
jz su_render_samples_finish
cmp eax, [_SP] ; compare current tick to rowlength
jl su_render_samples_loop
su_render_samples_finish:
inc eax
jmp su_render_samples_loop
su_render_samples_row_advance:
xor eax, eax ; row has finished, so clear the rowtick for next round
su_render_samples_buffer_full:
pop _CX
pop _BX
pop _DX
@ -107,7 +110,7 @@ su_render_samples_finish:
mov [_CX + su_synth_state.globaltime], ebx
mov [_CX + su_synth_state.rowtick], eax
pop _AX
pop _AX ; todo: return correct value based on this
pop _AX
%if BITS == 32 ; stdcall
popad
ret 12