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audio improvement wip

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git-svn-id: file:///home/notaz/opt/svn/PicoDrive@33 be3aeb3a-fb24-0410-a615-afba39da0efa
This commit is contained in:
notaz 2007-02-08 23:19:53 +00:00
parent f80d67e12b
commit 85f8e92973
11 changed files with 65 additions and 27 deletions
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6
Pico/sound/ym2612.s
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@ -2,6 +2,8 @@
@ it does not seem to give much performance increase (if any at all), so don't use it if it causes trouble.
@ - notaz, 2006
@ vim:filetype=armasm
.equiv SLOT1, 0
.equiv SLOT2, 2
.equiv SLOT3, 1
@ -725,7 +727,7 @@ upd_slot1:
@ lr=context, r12=pack (stereo, lastchan, disabled, lfo_enabled | pan_r, pan_l, ams[2] | AMmasks[4] | FB[4] | lfo_ampm[16])
@ r0-r2=scratch, r3=sin_tab/scratch, r4=(length<<8)|algo, r5=tl_tab/slot,
@ r0-r2=scratch, r3=sin_tab/scratch, r4=(length<<8)|unused[4],was_update,algo[3], r5=tl_tab/slot,
@ r6-r7=vol_out[4], r8=eg_timer, r9=eg_timer_add[31:16], r10=op1_out, r11=buffer
.global chan_render_loop @ chan_rend_context *ct, int *buffer, int length
@ -856,6 +858,7 @@ crl_algo_done:
@ -- WRITE SAMPLE --
tst r0, r0
beq ctl_sample_skip
orr r4, r4, #8 @ have_output
tst r12, #1
beq ctl_sample_mono
@ -908,6 +911,7 @@ crl_do_phase:
crl_loop_end:
str r8, [lr, #0x44] @ eg_timer
str r12, [lr, #0x4c] @ pack (for lfo_ampm)
str r4, [lr, #0x50] @ was_update
str r10, [lr, #0x54] @ op1_out
ldmfd sp!, {r4-r11,pc}