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More documenting for JASAramStream and JASDSPInterface

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PJB3005
2026-03-14 12:20:02 +01:00
parent e2fb0e3a70
commit 2ee0b8a27c
4 changed files with 337 additions and 175 deletions
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libs/JSystem/include/JSystem/JAudio2/JASDSPInterface.h
+37 -5
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@@ -94,11 +94,29 @@ namespace JASDsp {
void setDistFilter(s16);
void setBusConnect(u8 outputChannel, u8 param_1);
/**
* Whether this channel is currently actively playing audio.
*/
/* 0x000 */ u16 mIsActive;
/**
* Written by DSP to indicate playback has finished.
*/
/* 0x002 */ u16 mIsFinished;
/**
* Pitch shift via changing playback speed.
*/
/* 0x004 */ u16 mPitch;
/* 0x006 */ short _unused1;
/* 0x008 */ u16 field_0x008;
/**
* Set to 1 when playback starts, cleared by DSP later,
* checked by JASAramStream before actually doing processing.
* Presumably to instruct DSP to clear state?
* (Corroborated by fields JASAramStream checks never being cleared explicitly by CPU.)
*/
/* 0x008 */ u16 mResetFlag;
/* 0x00A */ u8 _unused2[0x00C - 0x00A];
/* 0x00C */ s16 mPauseFlag;
/* 0x00E */ short _unused3;
@@ -112,19 +130,33 @@ namespace JASDsp {
/* 0x05A */ u8 _unused5[0x060 - 0x05A];
/* 0x060 */ short field_0x060; // Only cleared to zero, presumed used by DSP.
/* 0x062 */ u8 _unused6[0x064 - 0x062];
/**
* Samples per ADPCM frame for ADPCM audio. Seems just set to 1 for PCM formats.
* Name could use improvement, probably?
*/
/* 0x064 */ u16 mSamplesPerBlock;
/* 0x066 */ short field_0x066; // Only cleared to zero, presumed used by DSP.
/* 0x068 */ int mSamplePosition; // Only ever initialized by code, name is guess.
/* 0x068 */ u32 mSamplePosition; // Only ever initialized by code, name is guess.
/* 0x06C */ u8 _unused7[0x070 - 0x06C];
/* 0x070 */ int mAramStreamPosition; // Seems written by DSP, used for audio streaming.
/* 0x074 */ int field_0x074;
/**
* Current audio read position in ARAM. Updated by DSP.
*/
/* 0x070 */ u32 mAramStreamPosition;
/**
* Amount of (decoded) audio samples left until the end of the buffer.
* Gets written by DSP, but also CPU.
*/
/* 0x074 */ u32 mSamplesLeft; // Never directly cleared to zero. Seems sus. Cleared by DSP?
/* 0x078 */ short field_0x078[4]; // Only cleared to zero, presumed used by DSP.
/* 0x080 */ short field_0x080[20]; // Only cleared to zero, presumed used by DSP.
/* 0x0A8 */ short field_0x0a8[4]; // Only cleared to zero, presumed used by DSP.
/* 0x0B0 */ u16 field_0x0b0[16]; // Only cleared to zero, presumed used by DSP.
/* 0x0D0 */ u8 _unused8[0x100 - 0x0D0];
/* 0x100 */ u16 mBytesPerBlock;
/* 0x102 */ u16 field_0x102;
/* 0x102 */ u16 mLoopFlag;
/**
* Used for decoding ADPCM data around loop edges.