45 lines
1.2 KiB
C
45 lines
1.2 KiB
C
#ifndef AUDIO_EFFECTS_H
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#define AUDIO_EFFECTS_H
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#include "internal.h"
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#include "platform_info.h"
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#define ADSR_STATE_DISABLED 0
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#define ADSR_STATE_INITIAL 1
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#define ADSR_STATE_START_LOOP 2
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#define ADSR_STATE_LOOP 3
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#define ADSR_STATE_FADE 4
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#define ADSR_STATE_HANG 5
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#define ADSR_STATE_DECAY 6
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#define ADSR_STATE_RELEASE 7
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#define ADSR_STATE_SUSTAIN 8
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#define ADSR_ACTION_RELEASE 0x10
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#define ADSR_ACTION_DECAY 0x20
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#define ADSR_ACTION_HANG 0x40
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#define ADSR_DISABLE 0
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#define ADSR_HANG -1
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#define ADSR_GOTO -2
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#define ADSR_RESTART -3
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// Envelopes are always stored as big endian, to match sequence files which are
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// byte blobs and can embed envelopes. Hence this byteswapping macro.
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#if IS_BIG_ENDIAN
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#define BSWAP16(x) (x)
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#else
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#define BSWAP16(x) (((x) & 0xff) << 8 | (((x) >> 8) & 0xff))
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#endif
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void sequence_player_process_sound(struct SequencePlayer *seqPlayer);
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void note_vibrato_update(struct Note *note);
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void note_vibrato_init(struct Note *note);
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void adsr_init(struct AdsrState *adsr, struct AdsrEnvelope *envelope, s16 *volOut);
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#ifdef VERSION_EU
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f32 adsr_update(struct AdsrState *adsr);
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#else
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s32 adsr_update(struct AdsrState *adsr);
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#endif
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#endif /* AUDIO_EFFECTS_H */
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