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47 lines
791 B
NASM
47 lines
791 B
NASM
FadeOutAudio::
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ld a, [wAudioFadeOutControl]
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and a ; currently fading out audio?
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jr nz, .fadingOut
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ld a, [wStatusFlags2]
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bit BIT_NO_AUDIO_FADE_OUT, a
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ret nz
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ld a, $77
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ldh [rAUDVOL], a
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ret
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.fadingOut
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ld a, [wAudioFadeOutCounter]
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and a
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jr z, .counterReachedZero
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dec a
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ld [wAudioFadeOutCounter], a
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ret
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.counterReachedZero
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ld a, [wAudioFadeOutCounterReloadValue]
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ld [wAudioFadeOutCounter], a
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ldh a, [rAUDVOL]
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and a ; has the volume reached 0?
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jr z, .fadeOutComplete
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ld b, a
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and $f
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dec a
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ld c, a
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ld a, b
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and $f0
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swap a
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dec a
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swap a
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or c
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ldh [rAUDVOL], a
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ret
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.fadeOutComplete
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ld a, [wAudioFadeOutControl]
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ld b, a
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xor a
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ld [wAudioFadeOutControl], a
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call StopAllMusic
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ld a, [wAudioSavedROMBank]
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ld [wAudioROMBank], a
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ld a, b
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ld [wNewSoundID], a
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jp PlaySound
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