mirror of
https://github.com/YohannDR/mzm.git
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More audio.c code
This commit is contained in:
y.demaisonregne
parent
85c39bb7d4
commit
b19851324d
@ -2,7 +2,7 @@
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This is a work in progress decompilation of Metroid - Zero Mission.
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2531/2721 functions decompiled (93.02%, 190 left)
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2539/2721 functions decompiled (93.31%, 182 left)
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Progress can be seen here : https://docs.google.com/spreadsheets/d/1X8XarD5evY8ZI7r_GQqh1pYmdVMbBcINYfRBUlogmKY/edit#gid=0
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**This decomp is not shiftable, don't use it as a base to work on anything**
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@ -12,10 +12,6 @@ struct MusicTrackInfo {
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i8 unk;
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};
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struct Voice {
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};
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struct Envelope {
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u8 attack;
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u8 decay;
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@ -23,6 +19,16 @@ struct Envelope {
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u8 release;
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};
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struct Voice {
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u8 instrumentType;
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u8 pitch;
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u8 unk_2;
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u8 unk_3;
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u32* pSample;
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struct Envelope envelope;
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};
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struct SoundQueue {
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u8 exists;
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u8 priority;
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@ -294,6 +300,7 @@ extern u8 gSoundCodeB[164];
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extern void* gSoundCodeCPointer;
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extern u8 gSoundCodeC[176];
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extern struct PSGSoundData gUnk_300376c[];
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extern struct PSGSoundData gPsgSounds[4];
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#endif
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319
src/audio.c
319
src/audio.c
@ -1,5 +1,6 @@
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#include "audio.h"
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#include "macros.h"
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#include "gba.h"
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#include "syscalls.h"
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void UpdateMusic(void)
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@ -193,7 +194,61 @@ void unk_1de8(struct TrackVariables* pVariables)
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void unk_1e2c(struct TrackData* pTrack, struct TrackVariables* pVariables)
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{
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// https://decomp.me/scratch/gWp3a
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u8 var_0;
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u8 var_1;
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u8 var_2;
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u8 i;
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struct SoundChannel* pChannel;
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if (pTrack->unknown_3 + pVariables->unknown_B > UCHAR_MAX)
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var_0 = UCHAR_MAX;
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else
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var_0 = pTrack->unknown_3 + pVariables->unknown_B;
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var_2 = var_0;
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var_1 = FALSE;
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pChannel = NULL;
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for (i = 0; i < gMusicInfo.maxSoundChannels; i++)
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{
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if (gMusicInfo.soundChannels[i].unknown_0 == 0)
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{
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pChannel = &gMusicInfo.soundChannels[i];
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// break;
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}
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if ((u8)(gMusicInfo.soundChannels[i].unknown_0 - 5) < 2 || gMusicInfo.soundChannels[i].unknown_0 == 8)
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{
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if (!var_1)
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var_1 = TRUE;
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}
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if (!var_1)
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{
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if (gMusicInfo.soundChannels[i].unknown_2 >= var_2 &&
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(gMusicInfo.soundChannels[i].unknown_2 > var_2 ||
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(gMusicInfo.soundChannels[i].pVariables <= pVariables &&
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gMusicInfo.soundChannels[i].pVariables < pVariables)))
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{
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continue;
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}
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}
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else
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{
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continue;
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}
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var_2 = gMusicInfo.soundChannels[i].unknown_2;
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pVariables = gMusicInfo.soundChannels[i].pVariables;
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pChannel = &gMusicInfo.soundChannels[i];
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}
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if (pChannel != NULL)
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{
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unk_4f8c(pChannel, pVariables, var_0);
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}
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}
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/**
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@ -216,14 +271,56 @@ void unk_1f3c(struct TrackData* pTrack, struct TrackVariables* pVariables)
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}
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}
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/**
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* @brief 1f90 | 50 | To document
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*
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* @param pTrack Track data pointer
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* @param pVariables Track variables pointer
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*/
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void unk_1f90(struct TrackData* pTrack, struct TrackVariables* pVariables)
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{
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u8 var_0;
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struct PSGSoundData* pSound;
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if (pTrack->unknown_3 + pVariables->unknown_B > UCHAR_MAX)
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var_0 = UCHAR_MAX;
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else
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var_0 = pTrack->unknown_3 + pVariables->unknown_B;
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pSound = &gUnk_300376c[pVariables->channel & 7];
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if (pSound->unknown_0 == 0 ||
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(var_0 >= pSound->unknown_16 &&
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(var_0 != pSound->unknown_16 ||
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pVariables <= pSound->pVariables)))
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{
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unk_2030(pSound, pVariables, var_0);
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}
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}
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/**
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* @brief 1fe0 | 50 | To document
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*
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* @param pTrack Track data pointer
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* @param pVariables Track variables pointer
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*/
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void unk_1fe0(struct TrackData* pTrack, struct TrackVariables* pVariables)
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{
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u8 var_0;
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struct PSGSoundData* pSound;
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if (pTrack->unknown_3 + pVariables->unknown_B > UCHAR_MAX)
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var_0 = UCHAR_MAX;
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else
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var_0 = pTrack->unknown_3 + pVariables->unknown_B;
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pSound = &gUnk_300376c[pVariables->channel & 7];
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if (pSound->unknown_0 == 0 ||
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(var_0 >= pSound->unknown_16 &&
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(var_0 != pSound->unknown_16 ||
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pVariables <= pSound->pVariables)))
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{
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unk_2030(pSound, pVariables, var_0);
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}
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}
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/**
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@ -291,14 +388,91 @@ u16 GetNoteDelay(struct TrackVariables* pVariables, u8 param_2, u8 param_3)
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}
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/**
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* @brief 2140 | 70 | To document
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*
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* @param pTrack Track data pointer
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* @param pVariables Track variables pointer
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*/
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void unk_2140(struct TrackData* pTrack, struct TrackVariables* pVariables)
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{
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struct SoundChannel* pChannel;
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struct SoundChannel* pNext;
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if (pVariables->pSoundPSG != NULL)
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{
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ClearRegistersForPsg(pVariables->pSoundPSG, (pVariables->channel & 7) - 1);
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pVariables->pSoundPSG->unknown_0 = 0;
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pVariables->pSoundPSG->pVariables = NULL;
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}
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if (pVariables->pChannel != NULL)
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{
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for (pChannel = pVariables->pChannel; pChannel != NULL; pChannel = pNext)
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{
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pChannel->unknown_0 = 10;
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pChannel->pVariables = NULL;
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pNext = pChannel->pChannel2;
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pChannel->pChannel2 = NULL;
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pChannel->pChannel1 = NULL;
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}
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}
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pVariables->pSoundPSG = NULL;
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pVariables->pChannel = NULL;
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if (++pTrack->unknown_4 == pTrack->amountOfTracks)
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{
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unk_2a38(pTrack);
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pTrack->flags = 0;
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pTrack->unknown_4 = 0;
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}
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pVariables->unknown_0 = 0;
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}
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/**
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* @brief 21b0 | 7c | To document
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*
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* @param pTrack Track data pointer
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* @param pVariables Track variables pointer
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*/
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void unk_21b0(struct TrackData* pTrack, struct TrackVariables* pVariables)
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{
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struct SoundChannel* pChannel;
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struct SoundChannel* pNext;
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if (pVariables->pSoundPSG != NULL)
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{
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ClearRegistersForPsg(pVariables->pSoundPSG, (pVariables->channel & 7) - 1);
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pVariables->pSoundPSG->unknown_0 = 0;
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pVariables->pSoundPSG->pVariables = NULL;
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}
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if (pVariables->pChannel != NULL)
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{
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for (pChannel = pVariables->pChannel; pChannel != NULL; pChannel = pNext)
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{
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pChannel->unknown_0 = 10;
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pChannel->pVariables = NULL;
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pNext = pChannel->pChannel2;
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pChannel->pChannel2 = NULL;
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pChannel->pChannel1 = NULL;
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}
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}
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pVariables->pSoundPSG = NULL;
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pVariables->pChannel = NULL;
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if (++pTrack->unknown_4 == pTrack->amountOfTracks)
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{
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unk_2a38(pTrack);
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pTrack->flags = 0;
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pTrack->unknown_4 = 0;
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pTrack->queueFlags |= 0x2;
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}
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pVariables->unknown_0 = 0;
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}
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/**
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@ -372,9 +546,67 @@ void unk_22b4(struct TrackVariables* pVariables)
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pVariables->pRawData++;
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}
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/**
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* @brief 22cc | c0 | To document
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*
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* @param pTrack Track data pointer
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* @param pVariables Track variables pointer
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*/
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void unk_22cc(struct TrackData* pTrack, struct TrackVariables* pVariables)
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{
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struct Voice* pVoice;
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u32 channel;
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pVoice = &pTrack->pVoice[*pVariables->pRawData];
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pVariables->channel = pVoice->instrumentType;
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if (pVariables->channel > 0x3F)
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{
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if (pVariables->channel == 0x80)
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{
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pVariables->unknown_0 |= 0x80;
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pVariables->pSample2 = pVoice->pSample;
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}
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else if (pVariables->channel == 0x40)
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{
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pVariables->unknown_0 |= 0x40;
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pVariables->pSample2 = pVoice->pSample;
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pVariables->envelope2 = pVoice->envelope;
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}
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}
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else
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{
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pVariables->unknown_0 &= 0xF;
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pVariables->unknown_36 = pVoice->unk_2;
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channel = pVariables->channel & 7;
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if (channel == 0)
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{
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pVariables->pSample1 = pVoice->pSample;
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}
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else if (channel < 3)
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{
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if (!(pVoice->unk_3 & 0x80) && pVoice->unk_3 & 0x70)
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pVariables->unknown_37 = pVoice->unk_3;
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else
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pVariables->unknown_37 = 8;
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pVariables->pSample1 = (u32*)((u32)pVoice->pSample << 0x1E >> 0x18);
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}
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else if (channel == 3)
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{
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UploadSampleToWaveRAM(pVoice->pSample);
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}
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else if (channel == 4)
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{
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pVariables->pSample1 = (u32*)((u32)pVoice->pSample << 0x1B >> 0x18);
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}
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pVariables->envelope1 = pVoice->envelope;
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}
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pVariables->pRawData++;
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}
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/**
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@ -507,9 +739,46 @@ void unk_2430(struct TrackVariables* pVariables)
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}
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}
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/**
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* @brief 2460 | 5c | To document
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*
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* @param pVariables Track variables pointer
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*/
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void unk_2460(struct TrackVariables* pVariables)
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{
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struct SoundChannel* pChannel;
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struct PSGSoundData* pSound;
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u32 var_0;
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if ((i8)*pVariables->pRawData >= 0)
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{
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var_0 = *pVariables->pRawData;
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pVariables->unknown_1 = var_0;
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pVariables->pRawData++;
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}
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else
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{
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var_0 = pVariables->unknown_1;
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}
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if (pVariables->pChannel)
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{
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for (pChannel = pVariables->pChannel; pChannel != NULL; pChannel = pChannel->pChannel2)
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{
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if ((u8)(pChannel->unknown_0 - 1) < 4 && pChannel->unknown_6 == var_0)
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{
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pChannel->unknown_0 = 5;
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break;
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}
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}
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}
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pSound = pVariables->pSoundPSG;
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if (pSound != NULL && pSound->unknown_17 == var_0)
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{
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pSound->unknown_0 = 5;
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pVariables->pSoundPSG->unknown_18 = 0;
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}
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}
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/**
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@ -522,13 +791,61 @@ void Music_Empty(struct TrackVariables* pVariables)
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return;
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}
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/**
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* @brief 24c0 | 5c | Clears the registers for a PSG sound
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*
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* @param pSound PSG sound pointer
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* @param channel Channel
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*/
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void ClearRegistersForPsg(struct PSGSoundData* pSound, u8 channel)
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{
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switch (channel)
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{
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case 0:
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write8(REG_SOUND1CNT_H + 1, 8);
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write16(REG_SOUND1CNT_X, 0x8000);
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break;
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case 1:
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write8(REG_SOUND2CNT_L + 1, 8);
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write16(REG_SOUND2CNT_H, 0x8000);
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break;
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case 2:
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write8(REG_SOUND3CNT_L, 0);
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break;
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case 3:
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write8(REG_SOUND4CNT_L + 1, 8);
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write16(REG_SOUND4CNT_H, 0x8000);
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break;
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}
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}
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/**
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* @brief 251c | 48 | Clears the registers for a PSG sound, unused
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*
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* @param pSound PSG sound pointer
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* @param channel Channel
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*/
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void ClearRegistersForPsg_Unused(struct PSGSoundData* pSound, u8 channel)
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{
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switch (channel)
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{
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case 0:
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write8(REG_SOUND1CNT_H + 1, 0);
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break;
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case 1:
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write8(REG_SOUND2CNT_L + 1, 0);
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break;
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case 2:
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write8(REG_SOUND3CNT_L, 0);
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break;
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case 3:
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write8(REG_SOUND4CNT_L + 1, 0);
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break;
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}
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}
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