Decompile alCents2Ratio
This commit is contained in:
Ryan Dwyer
parent
f307e51067
commit
278b7bc586
1
Makefile
1
Makefile
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@ -164,6 +164,7 @@ O3_C_FILES := \
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src/lib/ultra/gu/scale.c
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IDO71_C_FILES := \
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$(shell find src/lib/ultra/audio -name '*.c') \
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$(shell find src/lib/naudio -name '*.c') \
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src/lib/lib_3a100.c
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@ -82,7 +82,7 @@
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build/ROMID/lib/lib_39c80.o (section); \
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build/ROMID/lib/lib_39f70.o (section); \
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build/ROMID/lib/naudio/n_syndelete.o (section); \
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build/ROMID/lib/lib_39fe0.o (section); \
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build/ROMID/lib/ultra/audio/cents2ratio.o (section); \
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build/ROMID/lib/naudio/n_synallocfx.o (section); \
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build/ROMID/lib/lib_3a100.o (section); \
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build/ROMID/lib/naudio/n_drvrNew.o (section); \
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@ -79,7 +79,7 @@
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build/ROMID/lib/lib_39c80.o (section); \
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build/ROMID/lib/lib_39f70.o (section); \
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build/ROMID/lib/naudio/n_syndelete.o (section); \
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build/ROMID/lib/lib_39fe0.o (section); \
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build/ROMID/lib/ultra/audio/cents2ratio.o (section); \
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build/ROMID/lib/naudio/n_synallocfx.o (section); \
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build/ROMID/lib/lib_3a100.o (section); \
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build/ROMID/lib/naudio/n_drvrNew.o (section); \
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@ -79,7 +79,7 @@
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build/ROMID/lib/lib_39c80.o (section); \
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build/ROMID/lib/lib_39f70.o (section); \
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build/ROMID/lib/naudio/n_syndelete.o (section); \
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build/ROMID/lib/lib_39fe0.o (section); \
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build/ROMID/lib/ultra/audio/cents2ratio.o (section); \
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build/ROMID/lib/naudio/n_synallocfx.o (section); \
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build/ROMID/lib/lib_3a100.o (section); \
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build/ROMID/lib/naudio/n_drvrNew.o (section); \
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@ -1,7 +0,0 @@
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#ifndef _IN_LIB_LIB_39FE0_H
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#define _IN_LIB_LIB_39FE0_H
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#include <ultra64.h>
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#include "data.h"
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#include "types.h"
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#endif
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@ -3,7 +3,6 @@
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#include "bss.h"
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#include "lib/mtx.h"
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#include "lib/lib_2fc60.h"
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#include "lib/lib_39fe0.h"
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#include "data.h"
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#include "types.h"
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@ -5,7 +5,6 @@
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#include "lib/lib_2fc60.h"
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#include "lib/lib_317f0.h"
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#include "lib/lib_39c80.h"
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#include "lib/lib_39fe0.h"
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#include "lib/lib_3a100.h"
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#include "lib/lib_3d280.h"
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#include "lib/lib_3e3e0.h"
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@ -1,55 +0,0 @@
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#include <ultra64.h>
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#include "constants.h"
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#include "bss.h"
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#include "lib/lib_3a100.h"
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#include "data.h"
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#include "types.h"
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const u32 var70054a80[] = {0x3f8012ef};
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const u32 var70054a84[] = {0x3f7fda28};
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GLOBAL_ASM(
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glabel alCents2Ratio
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/* 39fe0: 27bdfff8 */ addiu $sp,$sp,-8
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/* 39fe4: 3c013f80 */ lui $at,0x3f80
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/* 39fe8: 44812000 */ mtc1 $at,$f4
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/* 39fec: 00000000 */ nop
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/* 39ff0: e7a40000 */ swc1 $f4,0x0($sp)
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/* 39ff4: 04800005 */ bltz $a0,.L0003a00c
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/* 39ff8: 00000000 */ nop
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/* 39ffc: 3c017005 */ lui $at,%hi(var70054a80)
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/* 3a000: c4264a80 */ lwc1 $f6,%lo(var70054a80)($at)
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/* 3a004: 10000005 */ b .L0003a01c
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/* 3a008: e7a60004 */ swc1 $f6,0x4($sp)
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.L0003a00c:
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/* 3a00c: 3c017005 */ lui $at,%hi(var70054a84)
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/* 3a010: c4284a84 */ lwc1 $f8,%lo(var70054a84)($at)
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/* 3a014: e7a80004 */ swc1 $f8,0x4($sp)
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/* 3a018: 00042023 */ negu $a0,$a0
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.L0003a01c:
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/* 3a01c: 1080000e */ beqz $a0,.L0003a058
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/* 3a020: 00000000 */ nop
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.L0003a024:
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/* 3a024: 308e0001 */ andi $t6,$a0,0x1
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/* 3a028: 11c00005 */ beqz $t6,.L0003a040
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/* 3a02c: 00000000 */ nop
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/* 3a030: c7aa0000 */ lwc1 $f10,0x0($sp)
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/* 3a034: c7b00004 */ lwc1 $f16,0x4($sp)
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/* 3a038: 46105482 */ mul.s $f18,$f10,$f16
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/* 3a03c: e7b20000 */ swc1 $f18,0x0($sp)
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.L0003a040:
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/* 3a040: c7a40004 */ lwc1 $f4,0x4($sp)
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/* 3a044: 46042182 */ mul.s $f6,$f4,$f4
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/* 3a048: e7a60004 */ swc1 $f6,0x4($sp)
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/* 3a04c: 00042043 */ sra $a0,$a0,0x1
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/* 3a050: 1480fff4 */ bnez $a0,.L0003a024
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/* 3a054: 00000000 */ nop
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.L0003a058:
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/* 3a058: 10000003 */ b .L0003a068
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/* 3a05c: c7a00000 */ lwc1 $f0,0x0($sp)
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/* 3a060: 10000001 */ b .L0003a068
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/* 3a064: 00000000 */ nop
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.L0003a068:
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/* 3a068: 03e00008 */ jr $ra
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/* 3a06c: 27bd0008 */ addiu $sp,$sp,0x8
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);
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@ -7,7 +7,6 @@
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#include "lib/lib_2fc60.h"
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#include "lib/lib_317f0.h"
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#include "lib/lib_39c80.h"
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#include "lib/lib_39fe0.h"
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#include "lib/lib_3a100.h"
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#include "lib/lib_3d280.h"
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#include "lib/lib_3e3e0.h"
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@ -0,0 +1,34 @@
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#include <libaudio.h>
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/*
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* alCents2Ratio()
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*
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* Calculates the pitch shift ratio from the number of cents according to
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* ratio = 2^(cents/1200)
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*
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* This is accurate to within one cent for ratios up an octave and down
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* two octaves.
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*/
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f32 alCents2Ratio(s32 cents)
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{
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f32 x;
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f32 ratio = 1.0f;
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if (cents >= 0) {
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x = 1.00057779f; /* 2^(1/1200) */
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} else {
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x = 0.9994225441f; /* 2^(-1/1200) */
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cents = -cents;
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}
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while (cents) {
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if (cents & 1) {
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ratio *= x;
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}
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x *= x;
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cents >>= 1;
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}
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return ratio;
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}
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