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Decomped DseTrackEvent_SongVolumeFade

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Decomped by @Snioflake
This commit is contained in:
AnonymousRandomPerson
2025-08-06 19:51:24 -04:00
parent ad23efbadc
commit 607b7b4ee7
7 changed files with 273 additions and 57 deletions
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43
src/main_02071BF4.c
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@@ -1,12 +1,16 @@
#include "main_02071BF4.h"
extern struct dse_driver_work DRIVER_WORK;
extern u32 DseChannel_SetInstrument(struct dse_channel *channel, u16 instrument_index);
extern u32 _u32_div_f(u32 dividend, u32 divisor);
extern u32 _s32_div_f(s32 dividend, s32 divisor);
u8* DseTrackEvent_Dummy1Byte(u8 *ptr_next_byte, struct dse_sequence *sequence, struct dse_track *track, struct dse_channel *channel)
{
return ptr_next_byte + 1;
}
extern u32 DseChannel_SetInstrument(struct dse_channel *channel, u16 instrument_index);
u8* DseTrackEvent_SetInstrument(u8 *ptr_next_byte, struct dse_sequence *sequence, struct dse_track *track, struct dse_channel *channel)
{
s32 iVar1;
@@ -17,3 +21,38 @@ u8* DseTrackEvent_SetInstrument(u8 *ptr_next_byte, struct dse_sequence *sequence
}
return ptr_next_byte + 1;
}
u8* DseTrackEvent_SongVolumeFade(u8 *ptr_next_byte, struct dse_sequence *sequence, struct dse_track *track, struct dse_channel *channel)
{
s32 iVar2;
u32 uVar3;
u16 uVar4;
uVar4 = (u32)*ptr_next_byte + (u32)ptr_next_byte[1] * 0x100 & 0xffff;
if (uVar4 == 0) {
uVar4 = 0;
}
else {
uVar4 = _u32_div_f(uVar4 * 1000,DRIVER_WORK.microseconds_per_driver_tick);
if (uVar4 == 0) {
uVar4 = 1;
}
}
iVar2 = (u32)ptr_next_byte[2] * 0x10000;
(sequence->volume).target = iVar2;
if (uVar4 == 0) {
(sequence->volume).current = iVar2;
}
else {
iVar2 = iVar2 - (sequence->volume).current;
if (iVar2 == 0) {
uVar4 = 0;
}
else {
uVar3 = _s32_div_f(iVar2,uVar4);
(sequence->volume).delta = uVar3;
}
}
(sequence->volume).ticks_remaining = (short)uVar4;
return ptr_next_byte + 3;
}