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https://gitlab.com/ryandwyer/perfect-dark
synced 2026-07-28 07:07:35 -04:00
Decompile _n_filterBuffer
This commit is contained in:
Ryan Dwyer
@@ -7,7 +7,6 @@
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u32 func0003ae60(void);
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u32 func0003b178(void);
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u32 func0003b370(void);
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u32 func0003b54c(void);
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void func0003b710(f32 outputrate, f32 arg1, f32 arg2, f32 *arg3, f32 *arg4);
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f32 func0003b9d4(s32 arg0);
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void func0003ba64(struct fx *fx, f32 outputrate);
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+15
-69
@@ -1,6 +1,7 @@
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#include <ultra64.h>
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#include <n_libaudio.h>
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#include "synthInternals.h"
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#include "naudio/n_synthInternals.h"
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#include "constants.h"
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#include "game/atan2f.h"
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#include "bss.h"
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@@ -11,6 +12,8 @@
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#define RANGE 2.0f
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Acmd *_n_filterBuffer(ALLowPass *lp, s32 buff, s32 count, Acmd *p);
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GLOBAL_ASM(
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glabel n_alAuxBusPull
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.late_rodata
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@@ -298,7 +301,7 @@ glabel var70054a90
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/* 3a534: 8fa50054 */ lw $a1,0x54($sp)
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/* 3a538: 87a60072 */ lh $a2,0x72($sp)
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/* 3a53c: 8fa7007c */ lw $a3,0x7c($sp)
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/* 3a540: 0c00ed53 */ jal func0003b54c
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/* 3a540: 0c00ed53 */ jal _n_filterBuffer
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/* 3a544: 8d640020 */ lw $a0,0x20($t3)
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/* 3a548: afa2007c */ sw $v0,0x7c($sp)
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.L0003a54c:
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@@ -1134,74 +1137,17 @@ glabel func0003b370
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/* 3b548: 00000000 */ nop
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);
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GLOBAL_ASM(
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glabel func0003b54c
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/* 3b54c: 27bdffd8 */ addiu $sp,$sp,-40
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/* 3b550: afbf0014 */ sw $ra,0x14($sp)
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/* 3b554: afa40028 */ sw $a0,0x28($sp)
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/* 3b558: afa5002c */ sw $a1,0x2c($sp)
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/* 3b55c: afa60030 */ sw $a2,0x30($sp)
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/* 3b560: afa70034 */ sw $a3,0x34($sp)
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/* 3b564: 8fae0034 */ lw $t6,0x34($sp)
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/* 3b568: afae0024 */ sw $t6,0x24($sp)
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/* 3b56c: 8faf0030 */ lw $t7,0x30($sp)
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/* 3b570: 000fc203 */ sra $t8,$t7,0x8
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/* 3b574: a7b80022 */ sh $t8,0x22($sp)
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/* 3b578: 8fb90024 */ lw $t9,0x24($sp)
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/* 3b57c: 27280008 */ addiu $t0,$t9,0x8
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/* 3b580: afa80024 */ sw $t0,0x24($sp)
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/* 3b584: afb9001c */ sw $t9,0x1c($sp)
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/* 3b588: 8faa001c */ lw $t2,0x1c($sp)
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/* 3b58c: 3c090b00 */ lui $t1,0xb00
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/* 3b590: 35290020 */ ori $t1,$t1,0x20
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/* 3b594: ad490000 */ sw $t1,0x0($t2)
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/* 3b598: 8fa40028 */ lw $a0,0x28($sp)
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/* 3b59c: 0c012d20 */ jal osVirtualToPhysical
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/* 3b5a0: 24840008 */ addiu $a0,$a0,0x8
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/* 3b5a4: 8fab001c */ lw $t3,0x1c($sp)
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/* 3b5a8: ad620004 */ sw $v0,0x4($t3)
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/* 3b5ac: 8fac0024 */ lw $t4,0x24($sp)
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/* 3b5b0: 258d0008 */ addiu $t5,$t4,0x8
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/* 3b5b4: afad0024 */ sw $t5,0x24($sp)
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/* 3b5b8: afac0018 */ sw $t4,0x18($sp)
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/* 3b5bc: 8fae0028 */ lw $t6,0x28($sp)
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/* 3b5c0: 8fac0018 */ lw $t4,0x18($sp)
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/* 3b5c4: 3c010e00 */ lui $at,0xe00
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/* 3b5c8: 8dcf0028 */ lw $t7,0x28($t6)
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/* 3b5cc: 85c90002 */ lh $t1,0x2($t6)
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/* 3b5d0: 31f800ff */ andi $t8,$t7,0xff
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/* 3b5d4: 0018cc00 */ sll $t9,$t8,0x10
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/* 3b5d8: 03214025 */ or $t0,$t9,$at
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/* 3b5dc: 312affff */ andi $t2,$t1,0xffff
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/* 3b5e0: 010a5825 */ or $t3,$t0,$t2
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/* 3b5e4: ad8b0000 */ sw $t3,0x0($t4)
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/* 3b5e8: 8faf002c */ lw $t7,0x2c($sp)
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/* 3b5ec: 8fad0028 */ lw $t5,0x28($sp)
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/* 3b5f0: 000fc080 */ sll $t8,$t7,0x2
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/* 3b5f4: 01b8c821 */ addu $t9,$t5,$t8
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/* 3b5f8: 0c012d20 */ jal osVirtualToPhysical
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/* 3b5fc: 8f24002c */ lw $a0,0x2c($t9)
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/* 3b600: 87a90022 */ lh $t1,0x22($sp)
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/* 3b604: 3c0100ff */ lui $at,0xff
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/* 3b608: 8fac0018 */ lw $t4,0x18($sp)
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/* 3b60c: 3421ffff */ ori $at,$at,0xffff
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/* 3b610: 312800ff */ andi $t0,$t1,0xff
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/* 3b614: 00085600 */ sll $t2,$t0,0x18
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/* 3b618: 00417024 */ and $t6,$v0,$at
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/* 3b61c: 01ca5825 */ or $t3,$t6,$t2
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/* 3b620: ad8b0004 */ sw $t3,0x4($t4)
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/* 3b624: 8faf0028 */ lw $t7,0x28($sp)
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/* 3b628: ade00028 */ sw $zero,0x28($t7)
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/* 3b62c: 10000003 */ b .L0003b63c
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/* 3b630: 8fa20024 */ lw $v0,0x24($sp)
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/* 3b634: 10000001 */ b .L0003b63c
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/* 3b638: 00000000 */ nop
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.L0003b63c:
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/* 3b63c: 8fbf0014 */ lw $ra,0x14($sp)
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/* 3b640: 27bd0028 */ addiu $sp,$sp,0x28
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/* 3b644: 03e00008 */ jr $ra
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/* 3b648: 00000000 */ nop
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);
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Acmd *_n_filterBuffer(ALLowPass *lp, s32 buff, s32 count, Acmd *p)
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{
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Acmd *ptr = p;
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s16 tmp = count >> 8;
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n_aLoadADPCM(ptr++, 32, osVirtualToPhysical(lp->fcvec.fccoef));
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n_aPoleFilter(ptr++, lp->first, lp->fgain, tmp, osVirtualToPhysical(lp->fstate[buff]));
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lp->first = 0;
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return ptr;
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}
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/**
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* Generate a triangle wave from -1 to 1, and find the current position
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@@ -214,8 +214,8 @@ void n_alFxNew(ALFx **fx_ar, ALSynConfig *c, s16 bus, ALHeap *hp)
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if (param[j]) {
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d->lp = alHeapAlloc(hp, 1, sizeof(ALLowPass));
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d->lp->fstate = alHeapAlloc(hp, 1, sizeof(POLEF_STATE));
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d->lp->unk30 = alHeapAlloc(hp, 1, 8);
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d->lp->fstate[0] = alHeapAlloc(hp, 1, sizeof(POLEF_STATE));
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d->lp->fstate[1] = alHeapAlloc(hp, 1, sizeof(POLEF_STATE));
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d->lp->fc = param[j++];
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_init_lpfilter(d->lp);
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} else {
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@@ -197,8 +197,7 @@ typedef struct {
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s64 force_aligned;
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} fcvec;
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s32 first;
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POLEF_STATE *fstate; // might need to be swapped with unk30
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void *unk30; // size 8
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POLEF_STATE *fstate[2];
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s32 unk34;
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} ALLowPass;
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