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Decompile _timeToSamplesNoRound

This commit is contained in:
Ryan Dwyer 2021-03-28 22:54:15 +10:00
parent dce847981c
commit fcccc9c9e1
2 changed files with 27 additions and 53 deletions
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39
src/include/PR/libaudio.h
View File

@ -304,26 +304,27 @@ typedef struct ALVoiceConfig_s {
u8 unityPitch; /* unity pitch flag */
} ALVoiceConfig;
/**
* This struct needs some modifications but I'm not sure how yet.
* outputRate should be at 0x40
*/
typedef struct {
ALPlayer *head; /* client list head */
ALLink pFreeList; /* list of free physical voices */
ALLink pAllocList; /* list of allocated physical voices */
ALLink pLameList; /* list of voices ready to be freed */
s32 paramSamples;
s32 curSamples; /* samples from start of game */
ALDMANew dma;
ALHeap *heap;
struct ALParam_s *paramList;
struct ALMainBus_s *mainBus;
struct ALAuxBus_s *auxBus; /* ptr to array of aux bus structs */
struct ALFilter_s *outputFilter; /* last filter in the filter chain */
s32 numPVoices;
s32 maxAuxBusses;
s32 outputRate; /* output sample rate */
s32 maxOutSamples; /* Maximum samples rsp can generate
/*0x00*/ ALPlayer *head; /* client list head */
/*0x04*/ ALLink pFreeList; /* list of free physical voices */
/*0x0c*/ ALLink pAllocList; /* list of allocated physical voices */
/*0x14*/ ALLink pLameList; /* list of voices ready to be freed */
/*0x1c*/ s32 paramSamples;
/*0x20*/ s32 curSamples; /* samples from start of game */
/*0x24*/ ALDMANew dma;
/*0x28*/ ALHeap *heap;
/*0x2c*/ struct ALParam_s *paramList;
/*0x30*/ struct ALMainBus_s *mainBus;
/*0x34*/ struct ALAuxBus_s *auxBus; /* ptr to array of aux bus structs */
/*0x38*/ struct ALFilter_s *outputFilter; /* last filter in the filter chain */
/*0x3c*/ s32 numPVoices;
/*0x40*/ s32 maxAuxBusses;
/*0x44*/ s32 outputRate; /* output sample rate */
/*0x48*/ s32 maxOutSamples; /* Maximum samples rsp can generate
at one time at output rate */
} ALSynth;

41
src/lib/lib_30ce0.c
View File

@ -9,11 +9,6 @@
#include "data.h"
#include "types.h"
const u32 var70054730[] = {0x49742400};
const u32 var70054734[] = {0x00000000};
const u32 var70054738[] = {0x00000000};
const u32 var7005473c[] = {0x00000000};
GLOBAL_ASM(
glabel func00030ce0
/* 30ce0: 27bdffc0 */ addiu $sp,$sp,-64
@ -525,35 +520,13 @@ void _freePVoice(PVoice *pvoice)
alLink((ALLink *)pvoice, &alGlobals->drvr.pLameList);
}
GLOBAL_ASM(
glabel _timeToSamplesNoRound
/* 31634: 27bdfff8 */ addiu $sp,$sp,-8
/* 31638: 3c0e8006 */ lui $t6,%hi(alGlobals)
/* 3163c: 8dcef114 */ lw $t6,%lo(alGlobals)($t6)
/* 31640: 44842000 */ mtc1 $a0,$f4
/* 31644: 3c017005 */ lui $at,%hi(var70054730)
/* 31648: 8dcf0040 */ lw $t7,0x40($t6)
/* 3164c: 468021a0 */ cvt.s.w $f6,$f4
/* 31650: c4324730 */ lwc1 $f18,%lo(var70054730)($at)
/* 31654: 448f4000 */ mtc1 $t7,$f8
/* 31658: 3c013f00 */ lui $at,0x3f00
/* 3165c: 468042a0 */ cvt.s.w $f10,$f8
/* 31660: 44814000 */ mtc1 $at,$f8
/* 31664: 460a3402 */ mul.s $f16,$f6,$f10
/* 31668: 46128103 */ div.s $f4,$f16,$f18
/* 3166c: 46082180 */ add.s $f6,$f4,$f8
/* 31670: e7a60004 */ swc1 $f6,0x4($sp)
/* 31674: c7aa0004 */ lwc1 $f10,0x4($sp)
/* 31678: 4600540d */ trunc.w.s $f16,$f10
/* 3167c: 44028000 */ mfc1 $v0,$f16
/* 31680: 10000003 */ b .L00031690
/* 31684: 00000000 */ nop
/* 31688: 10000001 */ b .L00031690
/* 3168c: 00000000 */ nop
.L00031690:
/* 31690: 03e00008 */ jr $ra
/* 31694: 27bd0008 */ addiu $sp,$sp,0x8
);
s32 _timeToSamplesNoRound(s32 micros)
{
// Should be outputRate but struct is not sized correctly
f32 tmp = ((f32)micros) * alGlobals->drvr.maxAuxBusses / 1000000.0f + 0.5f;
return (s32)tmp;
}
GLOBAL_ASM(
glabel func00031698