Decompile _init_lpfilter
This commit is contained in:
Ryan Dwyer
parent
a3a2d42e93
commit
7163ea66b3
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@ -1,6 +1,33 @@
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#include "n_synthInternals.h"
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#include <os.h>
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/*
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* WARNING: THE FOLLOWING CONSTANT MUST BE KEPT IN SYNC
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* WITH SCALING IN MICROCODE!!!
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*/
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#define SCALE 16384.0f
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/*
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* the following arrays contain default parameters for
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* a few hopefully useful effects.
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*/
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#define ms *(((s32)((f32)44.1))&~0x7)
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s32 SMALLROOM_PARAMS_N[26] = {
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/* sections length */
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3, 55 ms,
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/* chorus chorus filter
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input output fbcoef ffcoef gain rate depth coef */
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0 ms, 29.6 ms, 9830, -9830, 0, 0, 0, 0,
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10.4 ms, 20.8 ms, 3276, -3276, 0x3fff, 0, 0, 0,
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0 ms, 33 ms, 5000, 0, 0, 0, 0, 0x5000,
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};
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s32 BIGROOM_PARAMS_N[10] = {
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0, 0,
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0, 0, 0, 0, 0, 0, 0, 0,
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};
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GLOBAL_ASM(
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glabel func0003b710
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.late_rodata
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@ -106,97 +133,32 @@ glabel var70054ac4
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/* 3b880: 00000000 */ nop
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);
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GLOBAL_ASM(
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glabel _init_lpfilter
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/* 3b884: 27bdffe8 */ addiu $sp,$sp,-24
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/* 3b888: 848e0000 */ lh $t6,0x0($a0)
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/* 3b88c: 3c014680 */ lui $at,0x4680
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/* 3b890: 44814000 */ mtc1 $at,$f8
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/* 3b894: 448e2000 */ mtc1 $t6,$f4
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/* 3b898: 00000000 */ nop
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/* 3b89c: 468021a0 */ cvt.s.w $f6,$f4
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/* 3b8a0: 46083282 */ mul.s $f10,$f6,$f8
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/* 3b8a4: 4600540d */ trunc.w.s $f16,$f10
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/* 3b8a8: 44188000 */ mfc1 $t8,$f16
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/* 3b8ac: 00000000 */ nop
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/* 3b8b0: afb80010 */ sw $t8,0x10($sp)
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/* 3b8b4: 8fb90010 */ lw $t9,0x10($sp)
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/* 3b8b8: 001943c3 */ sra $t0,$t9,0xf
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/* 3b8bc: a7a8000e */ sh $t0,0xe($sp)
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/* 3b8c0: 87a9000e */ lh $t1,0xe($sp)
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/* 3b8c4: 3c014680 */ lui $at,0x4680
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/* 3b8c8: 44819000 */ mtc1 $at,$f18
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/* 3b8cc: 44892000 */ mtc1 $t1,$f4
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/* 3b8d0: 00000000 */ nop
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/* 3b8d4: 468021a0 */ cvt.s.w $f6,$f4
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/* 3b8d8: 46069201 */ sub.s $f8,$f18,$f6
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/* 3b8dc: 4600428d */ trunc.w.s $f10,$f8
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/* 3b8e0: 440b5000 */ mfc1 $t3,$f10
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/* 3b8e4: 00000000 */ nop
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/* 3b8e8: a48b0002 */ sh $t3,0x2($a0)
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/* 3b8ec: ac800028 */ sw $zero,0x28($a0)
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/* 3b8f0: afa00014 */ sw $zero,0x14($sp)
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.L0003b8f4:
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/* 3b8f4: 8fac0014 */ lw $t4,0x14($sp)
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/* 3b8f8: 000c6840 */ sll $t5,$t4,0x1
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/* 3b8fc: 008d7021 */ addu $t6,$a0,$t5
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/* 3b900: a5c00008 */ sh $zero,0x8($t6)
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/* 3b904: 8faf0014 */ lw $t7,0x14($sp)
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/* 3b908: 25f80001 */ addiu $t8,$t7,0x1
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/* 3b90c: 2b010008 */ slti $at,$t8,0x8
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/* 3b910: 1420fff8 */ bnez $at,.L0003b8f4
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/* 3b914: afb80014 */ sw $t8,0x14($sp)
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/* 3b918: 8fa80014 */ lw $t0,0x14($sp)
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/* 3b91c: 87b9000e */ lh $t9,0xe($sp)
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/* 3b920: 00084840 */ sll $t1,$t0,0x1
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/* 3b924: 00895021 */ addu $t2,$a0,$t1
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/* 3b928: a5590008 */ sh $t9,0x8($t2)
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/* 3b92c: 8fab0014 */ lw $t3,0x14($sp)
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/* 3b930: 256c0001 */ addiu $t4,$t3,0x1
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/* 3b934: afac0014 */ sw $t4,0x14($sp)
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/* 3b938: 3c014680 */ lui $at,0x4680
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/* 3b93c: 44818000 */ mtc1 $at,$f16
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/* 3b940: 00000000 */ nop
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/* 3b944: e7b00000 */ swc1 $f16,0x0($sp)
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/* 3b948: 87ad000e */ lh $t5,0xe($sp)
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/* 3b94c: c7a60000 */ lwc1 $f6,0x0($sp)
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/* 3b950: 448d2000 */ mtc1 $t5,$f4
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/* 3b954: 00000000 */ nop
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/* 3b958: 468024a0 */ cvt.s.w $f18,$f4
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/* 3b95c: 46069203 */ div.s $f8,$f18,$f6
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/* 3b960: e7a80008 */ swc1 $f8,0x8($sp)
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/* 3b964: e7a80004 */ swc1 $f8,0x4($sp)
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/* 3b968: 8fae0014 */ lw $t6,0x14($sp)
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/* 3b96c: 29c10010 */ slti $at,$t6,0x10
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/* 3b970: 10200014 */ beqz $at,.L0003b9c4
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/* 3b974: 00000000 */ nop
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.L0003b978:
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/* 3b978: c7aa0004 */ lwc1 $f10,0x4($sp)
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/* 3b97c: c7b00008 */ lwc1 $f16,0x8($sp)
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/* 3b980: 46105102 */ mul.s $f4,$f10,$f16
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/* 3b984: e7a40004 */ swc1 $f4,0x4($sp)
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/* 3b988: c7b20004 */ lwc1 $f18,0x4($sp)
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/* 3b98c: c7a60000 */ lwc1 $f6,0x0($sp)
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/* 3b990: 8fa80014 */ lw $t0,0x14($sp)
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/* 3b994: 46069202 */ mul.s $f8,$f18,$f6
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/* 3b998: 00084840 */ sll $t1,$t0,0x1
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/* 3b99c: 0089c821 */ addu $t9,$a0,$t1
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/* 3b9a0: 4600428d */ trunc.w.s $f10,$f8
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/* 3b9a4: 44185000 */ mfc1 $t8,$f10
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/* 3b9a8: 00000000 */ nop
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/* 3b9ac: a7380008 */ sh $t8,0x8($t9)
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/* 3b9b0: 8faa0014 */ lw $t2,0x14($sp)
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/* 3b9b4: 254b0001 */ addiu $t3,$t2,0x1
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/* 3b9b8: 29610010 */ slti $at,$t3,0x10
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/* 3b9bc: 1420ffee */ bnez $at,.L0003b978
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/* 3b9c0: afab0014 */ sw $t3,0x14($sp)
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.L0003b9c4:
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/* 3b9c4: 10000001 */ b .L0003b9cc
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/* 3b9c8: 00000000 */ nop
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.L0003b9cc:
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/* 3b9cc: 03e00008 */ jr $ra
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/* 3b9d0: 27bd0018 */ addiu $sp,$sp,0x18
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);
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void _init_lpfilter(ALLowPass *lp)
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{
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s32 i, temp;
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s16 fc;
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f32 ffc, fcoef;
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f32 scale;
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temp = lp->fc * SCALE;
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fc = temp >> 15;
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lp->fgain = SCALE - fc;
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lp->first = 0;
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for (i = 0; i < 8; i++) {
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lp->fcvec.fccoef[i] = 0;
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}
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lp->fcvec.fccoef[i++] = fc;
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scale = SCALE;
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fcoef = ffc = fc / scale;
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for (; i < 16; i++) {
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fcoef *= ffc;
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lp->fcvec.fccoef[i] = (s16)(fcoef * scale);
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}
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}
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GLOBAL_ASM(
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glabel func0003b9d4
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@ -388,33 +350,6 @@ glabel var70054ad4
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/* 3bc4c: 00000000 */ nop
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);
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/*
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* WARNING: THE FOLLOWING CONSTANT MUST BE KEPT IN SYNC
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* WITH SCALING IN MICROCODE!!!
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*/
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#define SCALE 16384
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/*
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* the following arrays contain default parameters for
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* a few hopefully useful effects.
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*/
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#define ms *(((s32)((f32)44.1))&~0x7)
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s32 SMALLROOM_PARAMS_N[26] = {
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/* sections length */
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3, 55 ms,
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/* chorus chorus filter
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input output fbcoef ffcoef gain rate depth coef */
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0 ms, 29.6 ms, 9830, -9830, 0, 0, 0, 0,
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10.4 ms, 20.8 ms, 3276, -3276, 0x3fff, 0, 0, 0,
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0 ms, 33 ms, 5000, 0, 0, 0, 0, 0x5000,
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};
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s32 BIGROOM_PARAMS_N[10] = {
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0, 0,
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0, 0, 0, 0, 0, 0, 0, 0,
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};
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void n_alFxNew(ALFx **fx_ar, ALSynConfig *c, s16 bus, ALHeap *hp)
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{
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u16 i, j, k;
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