mirror of https://github.com/zeldaret/mm.git
100 lines
4.0 KiB
C
100 lines
4.0 KiB
C
#ifndef AUDIO_REVERB_H
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#define AUDIO_REVERB_H
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#include "soundfont.h"
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#include "PR/ultratypes.h"
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#define REVERB_INDEX_NONE -1
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typedef enum ReverbDataType {
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/* 0 */ REVERB_DATA_TYPE_SETTINGS, // Reverb Settings (Init)
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/* 1 */ REVERB_DATA_TYPE_DELAY, // Reverb Delay (numSamples)
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/* 2 */ REVERB_DATA_TYPE_DECAY, // Reverb Decay Ratio
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/* 3 */ REVERB_DATA_TYPE_SUB_VOLUME, // Reverb Sub-Volume
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/* 4 */ REVERB_DATA_TYPE_VOLUME, // Reverb Volume
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/* 5 */ REVERB_DATA_TYPE_LEAK_RIGHT, // Reverb Leak Right Channel
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/* 6 */ REVERB_DATA_TYPE_LEAK_LEFT, // Reverb Leak Left Channel
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/* 7 */ REVERB_DATA_TYPE_FILTER_LEFT, // Reverb Left Filter
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/* 8 */ REVERB_DATA_TYPE_FILTER_RIGHT, // Reverb Right Filter
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/* 9 */ REVERB_DATA_TYPE_9 // Reverb Unk
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} ReverbDataType;
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typedef struct ReverbSettings {
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/* 0x00 */ u8 downsampleRate;
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/* 0x02 */ u16 delayNumSamples;
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/* 0x04 */ u16 decayRatio; // determines how fast reverb dissipates
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/* 0x06 */ u16 subDelay;
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/* 0x08 */ u16 subVolume;
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/* 0x0A */ u16 volume;
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/* 0x0C */ u16 leakRtl;
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/* 0x0E */ u16 leakLtr;
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/* 0x10 */ s8 mixReverbIndex;
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/* 0x12 */ u16 mixReverbStrength;
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/* 0x14 */ s16 lowPassFilterCutoffLeft;
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/* 0x16 */ s16 lowPassFilterCutoffRight;
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} ReverbSettings; // size = 0x18
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/**
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* Stores an entry of decompressed samples in a reverb ring buffer.
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* By storing the sample in a ring buffer, the time it takes to loop
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* around back to the same sample acts as a delay, leading to an echo effect.
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*/
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typedef struct ReverbBufferEntry {
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/* 0x00 */ s16 numSamplesAfterDownsampling; // never read
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/* 0x02 */ s16 numSamples; // never read
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/* 0x04 */ s16* toDownsampleLeft;
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/* 0x08 */ s16* toDownsampleRight; // data pointed to by left and right are adjacent in memory
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/* 0x0C */ s32 startPos; // start pos in ring buffer
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/* 0x10 */ s16 size; // first length in ring buffer (from startPos, at most until end)
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/* 0x12 */ s16 wrappedSize; // second length in ring buffer (from pos 0)
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/* 0x14 */ u16 loadResamplePitch;
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/* 0x16 */ u16 saveResamplePitch;
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/* 0x18 */ u16 saveResampleNumSamples;
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} ReverbBufferEntry; // size = 0x1C
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typedef struct SynthesisReverb {
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/* 0x000 */ u8 resampleFlags;
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/* 0x001 */ u8 useReverb;
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/* 0x002 */ u8 framesToIgnore;
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/* 0x003 */ u8 curFrame;
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/* 0x004 */ u8 downsampleRate;
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/* 0x005 */ s8 mixReverbIndex; // mix in reverb from this index. set to 0xFF to not mix any
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/* 0x006 */ u16 delayNumSamples; // number of samples between echos
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/* 0x008 */ s16 mixReverbStrength; // the gain/amount to mix in reverb from mixReverbIndex
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/* 0x00A */ s16 volume;
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/* 0x00C */ u16 decayRatio; // determines how fast reverb dissipate
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/* 0x00E */ u16 downsamplePitch;
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/* 0x010 */ s16 leakRtl;
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/* 0x012 */ s16 leakLtr;
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/* 0x014 */ u16 subDelay; // number of samples between sub echos
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/* 0x016 */ s16 subVolume; // strength of the sub echos
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/* 0x018 */ u8 resampleEffectOn;
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/* 0x019 */ s8 resampleEffectExtraSamples;
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/* 0x01A */ u16 resampleEffectLoadUnk;
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/* 0x01C */ u16 resampleEffectSaveUnk;
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/* 0x01E */ u8 delayNumSamplesAfterDownsampling;
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/* 0x020 */ s32 nextReverbBufPos;
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/* 0x024 */ s32 delayNumSamplesUnk; // May be bufSizePerChan
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/* 0x028 */ s16* leftReverbBuf;
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/* 0x02C */ s16* rightReverbBuf;
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/* 0x030 */ s16* leftLoadResampleBuf;
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/* 0x034 */ s16* rightLoadResampleBuf;
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/* 0x038 */ s16* leftSaveResampleBuf;
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/* 0x03C */ s16* rightSaveResampleBuf;
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/* 0x040 */ ReverbBufferEntry bufEntry[2][5];
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/* 0x158 */ ReverbBufferEntry subBufEntry[2][5];
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/* 0x270 */ s16* filterLeft;
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/* 0x274 */ s16* filterRight;
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/* 0x278 */ s16* filterLeftInit;
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/* 0x27C */ s16* filterRightInit;
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/* 0x280 */ s16* filterLeftState;
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/* 0x284 */ s16* filterRightState;
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/* 0x288 */ TunedSample tunedSample;
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/* 0x290 */ Sample sample;
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/* 0x2A0 */ AdpcmLoop loop;
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} SynthesisReverb; // size = 0x2D0
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extern ReverbSettings* gReverbSettingsTable[10];
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#endif
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