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-rw-r--r--home/audio.asm269
1 files changed, 152 insertions, 117 deletions
diff --git a/home/audio.asm b/home/audio.asm
index 9210924c..c982d9d6 100644
--- a/home/audio.asm
+++ b/home/audio.asm
@@ -1,182 +1,217 @@
-PlayDefaultMusic:: ; 2307 (0:2307)
+PlayDefaultMusic::
call WaitForSoundToFinish
xor a
ld c, a
ld d, a
- ld [wcfca], a
- jr asm_2324
+ ld [wLastMusicSoundID], a
+ jr PlayDefaultMusicCommon
-Func_2312:: ; 2312 (0:2312)
- ld c, $a
- ld d, $0
+PlayDefaultMusicFadeOutCurrent::
+; Fade out the current music and then play the default music.
+ ld c, 10
+ ld d, 0
ld a, [wd72e]
- bit 5, a
- jr z, asm_2324
+ bit 5, a ; has a battle just ended?
+ jr z, PlayDefaultMusicCommon
xor a
- ld [wcfca], a
- ld c, $8
+ ld [wLastMusicSoundID], a
+ ld c, 8
ld d, c
-asm_2324:: ; 2324 (0:2324)
+
+PlayDefaultMusicCommon::
ld a, [wWalkBikeSurfState]
and a
- jr z, .asm_2343
+ jr z, .walking
cp $2
- jr z, .asm_2332
+ jr z, .surfing
ld a, MUSIC_BIKE_RIDING
- jr .asm_2334
-.asm_2332
+ jr .next
+
+.surfing
ld a, MUSIC_SURFING
-.asm_2334
+
+.next
ld b, a
ld a, d
- and a
+ and a ; should current music be faded out first?
ld a, BANK(Music_BikeRiding)
- jr nz, .asm_233e
- ld [wc0ef], a
-.asm_233e
- ld [wc0f0], a
- jr .asm_234c
-.asm_2343
- ld a, [wd35b]
+ jr nz, .next2
+
+; Only change the audio ROM bank if the current music isn't going to be faded
+; out before the default music begins.
+ ld [wAudioROMBank], a
+
+.next2
+; [wAudioSavedROMBank] will be copied to [wAudioROMBank] after fading out the
+; current music (if the current music is faded out).
+ ld [wAudioSavedROMBank], a
+ jr .next3
+
+.walking
+ ld a, [wMapMusicSoundID]
ld b, a
- call Func_2385
- jr c, .asm_2351
-.asm_234c
- ld a, [wcfca]
- cp b
- ret z
-.asm_2351
+ call CompareMapMusicBankWithCurrentBank
+ jr c, .next4
+
+.next3
+ ld a, [wLastMusicSoundID]
+ cp b ; is the default music already playing?
+ ret z ; if so, do nothing
+
+.next4
ld a, c
- ld [wMusicHeaderPointer], a
+ ld [wAudioFadeOutControl], a
ld a, b
- ld [wcfca], a
- ld [wc0ee], a
+ ld [wLastMusicSoundID], a
+ ld [wNewSoundID], a
jp PlaySound
-Func_235f:: ; 235f (0:235f)
- ld a, [wc0ef]
+UpdateMusic6Times::
+; This is called when entering a map, before fading out the current music and
+; playing the default music (i.e. the map's music or biking/surfing music).
+ ld a, [wAudioROMBank]
ld b, a
- cp BANK(Music2_UpdateMusic)
- jr nz, .checkForBank08
-.bank02
- ld hl, Music2_UpdateMusic
- jr .asm_2378
-.checkForBank08
- cp BANK(Music8_UpdateMusic)
- jr nz, .bank1F
-.bank08
- ld hl, Music8_UpdateMusic
- jr .asm_2378
-.bank1F
- ld hl, Music1f_UpdateMusic
-.asm_2378
- ld c, $6
-.asm_237a
+ cp BANK(Audio1_UpdateMusic)
+ jr nz, .checkForAudio2
+
+; audio 1
+ ld hl, Audio1_UpdateMusic
+ jr .next
+
+.checkForAudio2
+ cp BANK(Audio2_UpdateMusic)
+ jr nz, .audio3
+
+; audio 2
+ ld hl, Audio2_UpdateMusic
+ jr .next
+
+.audio3
+ ld hl, Audio3_UpdateMusic
+
+.next
+ ld c, 6
+.loop
push bc
push hl
call Bankswitch
pop hl
pop bc
dec c
- jr nz, .asm_237a
+ jr nz, .loop
ret
-Func_2385:: ; 2385 (0:2385)
- ld a, [wd35c]
+CompareMapMusicBankWithCurrentBank::
+; Compares the map music's audio ROM bank with the current audio ROM bank
+; and updates the audio ROM bank variables.
+; Returns whether the banks are different in carry.
+ ld a, [wMapMusicROMBank]
ld e, a
- ld a, [wc0ef]
+ ld a, [wAudioROMBank]
cp e
- jr nz, .asm_2394
- ld [wc0f0], a
+ jr nz, .differentBanks
+ ld [wAudioSavedROMBank], a
and a
ret
-.asm_2394
- ld a, c
+.differentBanks
+ ld a, c ; this is a fade-out counter value and it's always non-zero
and a
ld a, e
- jr nz, .asm_239c
- ld [wc0ef], a
-.asm_239c
- ld [wc0f0], a
+ jr nz, .next
+; If the fade-counter is non-zero, we don't change the audio ROM bank because
+; it's needed to keep playing the music as it fades out. The FadeOutAudio
+; routine will take care of copying [wAudioSavedROMBank] to [wAudioROMBank]
+; when the music has faded out.
+ ld [wAudioROMBank], a
+.next
+ ld [wAudioSavedROMBank], a
scf
ret
-PlayMusic:: ; 23a1 (0:23a1)
+PlayMusic::
ld b, a
- ld [wc0ee], a
+ ld [wNewSoundID], a
xor a
- ld [wMusicHeaderPointer], a
+ ld [wAudioFadeOutControl], a
ld a, c
- ld [wc0ef], a
- ld [wc0f0], a
+ ld [wAudioROMBank], a
+ ld [wAudioSavedROMBank], a
ld a, b
; plays music specified by a. If value is $ff, music is stopped
-PlaySound:: ; 23b1 (0:23b1)
+PlaySound::
push hl
push de
push bc
ld b, a
- ld a, [wc0ee]
+ ld a, [wNewSoundID]
and a
- jr z, .asm_23c8
+ jr z, .next
xor a
- ld [wc02a], a
- ld [wc02b], a
- ld [wc02c], a
- ld [wc02d], a
-.asm_23c8
- ld a, [wMusicHeaderPointer]
- and a
- jr z, .asm_23e3
- ld a, [wc0ee]
- and a
- jr z, .asm_2425
+ ld [wChannelSoundIDs + Ch4], a
+ ld [wChannelSoundIDs + Ch5], a
+ ld [wChannelSoundIDs + Ch6], a
+ ld [wChannelSoundIDs + Ch7], a
+.next
+ ld a, [wAudioFadeOutControl]
+ and a ; has a fade-out length been specified?
+ jr z, .noFadeOut
+ ld a, [wNewSoundID]
+ and a ; is the new sound ID 0?
+ jr z, .done ; if so, do nothing
xor a
- ld [wc0ee], a
- ld a, [wcfca]
- cp $ff
- jr nz, .asm_2414
+ ld [wNewSoundID], a
+ ld a, [wLastMusicSoundID]
+ cp $ff ; has the music been stopped?
+ jr nz, .fadeOut ; if not, fade out the current music
+; If it has been stopped, start playing the new music immediately.
xor a
- ld [wMusicHeaderPointer], a
-.asm_23e3
+ ld [wAudioFadeOutControl], a
+.noFadeOut
xor a
- ld [wc0ee], a
+ ld [wNewSoundID], a
ld a, [H_LOADEDROMBANK]
- ld [$ffb9], a
- ld a, [wc0ef]
+ ld [hSavedROMBank], a
+ ld a, [wAudioROMBank]
ld [H_LOADEDROMBANK], a
- ld [$2000], a
- cp BANK(Func_9876)
- jr nz, .checkForBank08
-.bank02
+ ld [MBC1RomBank], a
+ cp BANK(Audio1_PlaySound)
+ jr nz, .checkForAudio2
+
+; audio 1
ld a, b
- call Func_9876
- jr .asm_240b
-.checkForBank08
- cp BANK(Func_22035)
- jr nz, .bank1F
-.bank08
+ call Audio1_PlaySound
+ jr .next2
+
+.checkForAudio2
+ cp BANK(Audio2_PlaySound)
+ jr nz, .audio3
+
+; audio 2
ld a, b
- call Func_22035
- jr .asm_240b
-.bank1F
+ call Audio2_PlaySound
+ jr .next2
+
+.audio3
ld a, b
- call Func_7d8ea
-.asm_240b
- ld a, [$ffb9]
+ call Audio3_PlaySound
+
+.next2
+ ld a, [hSavedROMBank]
ld [H_LOADEDROMBANK], a
- ld [$2000], a
- jr .asm_2425
-.asm_2414
+ ld [MBC1RomBank], a
+ jr .done
+
+.fadeOut
ld a, b
- ld [wcfca], a
- ld a, [wMusicHeaderPointer]
- ld [wcfc8], a
- ld [wcfc9], a
+ ld [wLastMusicSoundID], a
+ ld a, [wAudioFadeOutControl]
+ ld [wAudioFadeOutCounterReloadValue], a
+ ld [wAudioFadeOutCounter], a
ld a, b
- ld [wMusicHeaderPointer], a
-.asm_2425
+ ld [wAudioFadeOutControl], a
+
+.done
pop bc
pop de
pop hl
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