Functions
void	create_audio_system (void)

void	nuAuMgr (void *arg)

s32	nuAuDmaCallBack (s32 addr, s32 len, void *state, u8 useDma)
	DMA callback for audio sample streaming; manages a DMA buffer cache.

void	au_release_voice (u8 index)

void	au_engine_init (s32 outputRate)

void	au_update_clients_for_video_frame (void)
	this is called once per video frame update (50 or 60 times per second)

void	au_update_clients_for_audio_frame (void)
	this is called per audio frame generated by alAudioFrame (every 184 audio samples) there will be multiuple of these per video frame

void	au_syn_begin_audio_frame (AuGlobals *globals)

void	au_reset_nonfree_voice (AuVoice *arg0, u8 arg1)

void	au_reset_voice (AuVoice *voice, u8 voiceIdx)

f32	au_compute_pitch_ratio (s32 tuning)
	Converts a linear pitch value (in cents) into a frequency ratio suitable for adjusting playback speed.

void	au_fade_init (Fade *fade, s32 time, s32 startValue, s32 endValue)

void	au_fade_clear (Fade *fade)

void	au_fade_update (Fade *fade)

void	au_fade_set_volume (u8 arg0, u16 arg1, s32 arg2)

void	au_fade_flush (Fade *fade)

void	au_fade_set_envelope (Fade *fade, s16 value)

void	au_fade_calc_envelope (Fade *fade, u32 arg1, s32 target)

void	au_fade_update_envelope (Fade *fade)

Instrument *	au_get_instrument (AuGlobals globals, BankSetIndex bank, s32 patch, EnvelopeData arg3)
	Note that bank is supplied as BankSetIndex and not BankSet, which means it will be used to perform a raw access into AuGlobals::bankSets.

void	au_get_bgm_player_and_file (u32 playerIndex, BGMHeader outCurrentTrackData, BGMPlayer outPlayer)

void	au_get_bgm_player (u32 playerIndex, BGMPlayer **outPlayer)

AuResult	au_load_song_files (u32 arg0, BGMHeader arg1, BGMPlayer arg2)

AuResult	au_reload_song_files (s32 songID, BGMHeader *arg1)

BGMPlayer *	au_get_snapshot_by_index (s32 index)

AuResult	au_ambient_load (u32 arg0)

BGMPlayer *	au_get_client_by_priority (u8 arg0)

void	au_load_INIT (AuGlobals arg0, s32 romAddr, ALHeap heap)

AuResult	au_fetch_SBN_file (u32 fileIdx, AuFileFormat format, SBNFileEntry *arg2)

void	au_load_PER (AuGlobals *globals, s32 romAddr)

void	au_load_PRG (AuGlobals *arg0, s32 romAddr)

InstrumentBank *	au_get_BK_instruments (BankSet bankSet, u32 bankIndex)

BKFileBuffer *	au_load_BK_to_bank (s32 bkFileOffset, BKFileBuffer *bkFile, s32 bankIndex, BankSet bankSet)
	Loads an instrument bank file from ROM, allocates memory if needed, and sets up instrument pointers.

void	au_swizzle_BK_instruments (s32 bkFileOffset, BKFileBuffer *bkFile, InstrumentBank instruments, u32 instrumentCount, u8 arg4)
	Fixes up (swizzles) instrument pointers in a loaded bank, converting file-relative offsets to valid RAM pointers.

BKFileBuffer *	au_load_static_BK_to_bank (s32 bkFileOffset, void vaddr, s32 bankIndex, BankSet bankSet)
	UNUSED Loads an instrument bank file from ROM to a given buffer (allocates if needed), and sets up instrument pointers.

s32	au_load_aux_bank (s32 bkFileOffset, s32 bankIndex)

void	au_clear_instrument_group (s32 bankIndex, BankSet bankSet)
	unused. resets all instruments in (bankIndex, bankSet) to default

void	au_set_bus_volume_level (s32 arg0, u32 idx)

s32	au_set_reverb_type (s32 arg0, s32 arg1)

void	au_sync_channel_delay_enabled (u32 arg0)

void	au_read_rom (s32 romAddr, void *buffer, u32 size)

void	au_memset (void *dst, s32 size, u8 value)

void	au_copy_bytes (s8 src, s8 dest, s32 size)

void	au_copy_words (void src, void dst, s32 size)

void	au_driver_init (AuSynDriver driver, ALConfig config)

void	au_driver_release (void)

void	au_use_global_volume (void)

void	au_set_global_volume (s16 arg0)

s16	au_get_global_volume (void)

void	au_set_stereo_enabled (b8 enabled)

void	au_bus_set_volume (u8 busID, u16 value)

u16	au_bus_get_volume (u8 busID)

void	au_bus_set_effect (u8 busID, u8 effectID)

void	au_bus_set_fx_params (u8 busID, s16 arg1, s16 arg2, s32 arg3)

void	au_pvoice_set_bus (u8 voiceIdx, s8 busID)

void	au_syn_stop_voice (u8 voiceIdx)

void	au_syn_start_voice (u8 index)

void	au_syn_start_voice_params (u8 index, u8 reverbType, Instrument *table, f32 pitch, s16 vol, u8 pan, u8 fxMix, s32 delta)

void	au_syn_set_wavetable (u8 voiceIdx, Instrument *table)

void	au_syn_set_pitch (u8 voiceIdx, f32 pitchRatio)

void	au_syn_set_mixer_params (u8 voiceIdx, s16 volume, s32 arg2, u8 arg3, u8 arg4)

void	au_syn_set_pan_fxmix (u8 voiceIdx, u8 arg1, u8 arg2)

void	au_syn_set_volume_delta (u8 voiceIdx, s16 arg1, s32 arg2)

void	au_syn_set_pan (u8 voiceIdx, u8 pan)

void	au_syn_set_fxmix (u8 voiceIdx, u8 dryAmt)

s32	au_syn_get_playing (u8 voiceIdx)

s32	au_syn_get_bus (u8 voiceIdx)

f32	au_syn_get_pitch (u8 voiceIdx)

u8	au_syn_get_pan (u8 voiceIdx)

s16	au_syn_get_dryamt (u8 voiceIdx)

s16	au_syn_get_wetamt (u8 voiceIdx)

s32	au_syn_get_volume_left (u8 voiceIdx)

s32	au_syn_get_volume_right (u8 voiceIdx)

void	au_set_delay_time (s32 arg0)

void	au_delay_left_channel (u8 arg0)

void	au_delay_right_channel (u8 arg0)

void	au_disable_channel_delay (void)

void	au_init_delay_channel (s16 arg0)

void *	alHeapAlloc (ALHeap *heap, s32 count, s32 size)

void	au_flush_finished_voices (AuGlobals *globals)
	(UNUSED) Immediately flush all voices which have finished playing.

void	au_init_voices (AuGlobals *globals)
	Initializes all voices in the audio system.

void	au_update_voices (AuGlobals *globals)
	Main envelope system update, called once per frame.

void	au_voice_after_volume_change (AuVoice *voice)
	Applies volume update after a client-side volume change.

s32	au_voice_get_delta (s32 usecs)
	Converts envelope step duration from microseconds to num samples delta.

void	au_voice_start (AuVoice voice, EnvelopeData envData)
	Starts a new voice with the given envelope data.

u8	au_voice_step (AuVoice *voice)
	Parses and executes envelope commands until a time interval is found.

void	au_voice_set_vol_changed (AuVoice *voice)
	(UNUSED) Force recalculation of voice envelope volume during next update.

Acmd *	au_pull_voice (AuPVoice pvoice, Acmd cmdBufPos)

void	au_fx_create (AuFX fx, u8 mode, ALHeap heap)

void	au_filter_create (AuFilter filter, ALHeap heap)

void	au_filter_init (AuFilter *filter, s16 arg1, s16 arg2, s16 fc)

void	au_fx_load_preset (AuFX *fx, u8 effectType)

Acmd *	au_pull_fx (AuFX fx, Acmd cmdBusPos, s16, s16)
	Applies a chain of delay-line based effects to audio and mixes into output.

s32	au_fx_param_hdl (AuFX *fx, s16 index, s16 paramID, s32 value)

Function Documentation

◆ alHeapAlloc()

void * alHeapAlloc	(	ALHeap *	heap,
		s32	count,
		s32	size )

Referenced by au_driver_init(), au_engine_init(), au_filter_create(), au_fx_create(), au_load_BK_to_bank(), au_load_INIT(), au_load_static_BK_to_bank(), and create_audio_system().

◆ au_ambient_load()

AuResult au_ambient_load ( u32 arg0 )

Referenced by snd_load_ambient().

◆ au_bus_get_volume()

u16 au_bus_get_volume ( u8 busID )

◆ au_bus_set_effect()

void au_bus_set_effect	(	u8	busID,
		u8	effectID )

Referenced by au_syn_begin_audio_frame().

◆ au_bus_set_fx_params()

void au_bus_set_fx_params	(	u8	busID,
		s16	arg1,
		s16	arg2,
		s32	arg3 )

◆ au_bus_set_volume()

void au_bus_set_volume	(	u8	busID,
		u16	value )

Referenced by au_fade_set_volume().

◆ au_clear_instrument_group()

void au_clear_instrument_group	(	s32	bankIndex,
		BankSet	bankSet )

unused. resets all instruments in (bankIndex, bankSet) to default

◆ au_compute_pitch_ratio()

f32 au_compute_pitch_ratio ( s32 tuning )

Converts a linear pitch value (in cents) into a frequency ratio suitable for adjusting playback speed.

This function computes the playback rate corresponding to a pitch shift (up or down) in cents. Positive values increase pitch (higher frequency), and negative values decrease it. Recall 100 cents = 1 semitone, and therefore 1200 cents = 1 octave.

Parameters

tuning The pitch offset in cents, from +4095 (~ 40.95 semitones up) to -16383 (~ 163.83 semitones down)

Returns: Floating point output rate multiplier. Multiply this with the base sample rate to apply the pitch.

Referenced by au_bgm_player_update_playing(), au_mseq_player_update(), and au_mseq_restore_voices().

◆ au_copy_bytes()

void au_copy_bytes	(	s8 *	src,
		s8 *	dest,
		s32	size )

◆ au_copy_words()

void au_copy_words	(	void *	src,
		void *	dst,
		s32	size )

Referenced by au_bgm_process_suspend(), au_bgm_restore_copied_player(), au_load_PER(), and au_load_PRG().

◆ au_delay_left_channel()

void au_delay_left_channel ( u8 arg0 )

Referenced by au_syn_begin_audio_frame().

◆ au_delay_right_channel()

void au_delay_right_channel ( u8 arg0 )

Referenced by au_syn_begin_audio_frame().

◆ au_disable_channel_delay()

void au_disable_channel_delay ( void )

Referenced by au_syn_begin_audio_frame().

◆ au_driver_init()

void au_driver_init	(	AuSynDriver *	driver,
		ALConfig *	config )

Referenced by create_audio_system().

◆ au_driver_release()

void au_driver_release ( void )

◆ au_engine_init()

void au_engine_init ( s32 outputRate )

Referenced by create_audio_system().

◆ au_fade_calc_envelope()

void au_fade_calc_envelope	(	Fade *	fade,
		u32	arg1,
		s32	target )

Referenced by au_bgm_adjust_volume().

◆ au_fade_clear()

void au_fade_clear ( Fade * fade )

◆ au_fade_flush()

void au_fade_flush ( Fade * fade )

Referenced by au_set_bus_volume_level().

◆ au_fade_init()

void au_fade_init	(	Fade *	fade,
		s32	time,
		s32	startValue,
		s32	endValue )

Referenced by au_bgm_process_init_song(), au_bgm_restore_copied_player(), and au_sfx_init().

◆ au_fade_set_envelope()

void au_fade_set_envelope	(	Fade *	fade,
		s16	value )

Referenced by au_bgm_player_init().

◆ au_fade_set_volume()

void au_fade_set_volume	(	u8	arg0,
		u16	arg1,
		s32	arg2 )

Referenced by au_bgm_update_bus_volumes(), au_sfx_init(), and au_update_clients_for_audio_frame().

◆ au_fade_update()

void au_fade_update ( Fade * fade )

Referenced by au_update_clients_for_audio_frame().

◆ au_fade_update_envelope()

void au_fade_update_envelope ( Fade * fade )

Referenced by au_update_clients_for_audio_frame().

◆ au_fetch_SBN_file()

AuResult au_fetch_SBN_file	(	u32	fileIdx,
		AuFileFormat	format,
		SBNFileEntry *	arg2 )

Referenced by au_engine_init(), au_load_BK_headers(), au_load_song_files(), and au_reload_song_files().

◆ au_filter_create()

void au_filter_create	(	AuFilter *	filter,
		ALHeap *	heap )

◆ au_filter_init()

void au_filter_init	(	AuFilter *	filter,
		s16	arg1,
		s16	arg2,
		s16	fc )

Referenced by au_filter_create().

◆ au_flush_finished_voices()

void au_flush_finished_voices ( AuGlobals * globals )

(UNUSED) Immediately flush all voices which have finished playing.

These are normally released automatically during the start of each audio frame.

◆ au_fx_create()

void au_fx_create	(	AuFX *	fx,
		u8	effectType,
		ALHeap *	heap )

Parameters

effectType from enum AuEffectType

Referenced by au_driver_init().

◆ au_fx_load_preset()

void au_fx_load_preset	(	AuFX *	fx,
		u8	effectType )

Referenced by au_bus_set_effect(), and au_fx_create().

◆ au_fx_param_hdl()

s32 au_fx_param_hdl	(	AuFX *	fx,
		s16	index,
		s16	paramID,
		s32	value )

Referenced by au_bus_set_fx_params().

◆ au_get_bgm_player()

void au_get_bgm_player	(	u32	playerIndex,
		BGMPlayer **	outPlayer )

◆ au_get_bgm_player_and_file()

void au_get_bgm_player_and_file	(	u32	playerIndex,
		BGMHeader **	outCurrentTrackData,
		BGMPlayer **	outPlayer )

Referenced by snd_song_load().

◆ au_get_BK_instruments()

InstrumentBank * au_get_BK_instruments	(	BankSet	bankSet,
		u32	bankIndex )

Referenced by au_clear_instrument_group(), au_load_BK_to_bank(), and au_load_static_BK_to_bank().

◆ au_get_client_by_priority()

BGMPlayer * au_get_client_by_priority ( u8 arg0 )

Referenced by au_bgm_process_resume().

◆ au_get_global_volume()

s16 au_get_global_volume ( void )

Referenced by nuAuPreNMIProc().

◆ au_get_instrument()

Instrument * au_get_instrument	(	AuGlobals *	globals,
		BankSetIndex	bank,
		s32	patch,
		EnvelopeData *	envData )

Note that bank is supplied as BankSetIndex and not BankSet, which means it will be used to perform a raw access into AuGlobals::bankSets.

This does not affect values above 3, but 1 and 2 differ.

Referenced by au_bgm_player_update_playing(), au_BGMCmd_E8_TrackOverridePatch(), au_BGMCmd_F5_UseInstrument(), and au_mseq_player_update().

◆ au_get_snapshot_by_index()

BGMPlayer * au_get_snapshot_by_index ( s32 index )

Referenced by au_bgm_process_resume(), and au_bgm_process_suspend().

◆ au_init_delay_channel()

void au_init_delay_channel ( s16 arg0 )

Referenced by au_engine_init().

◆ au_init_voices()

void au_init_voices ( AuGlobals * globals )

Initializes all voices in the audio system.

Sets default values and clears previous envelope state.

Referenced by au_engine_init().

◆ au_load_aux_bank()

s32 au_load_aux_bank	(	s32	bkFileOffset,
		s32	bankIndex )

Referenced by au_ambient_load(), au_load_BGM(), au_load_song_files(), and au_reload_song_files().

◆ au_load_BK_to_bank()

BKFileBuffer * au_load_BK_to_bank	(	s32	bkFileOffset,
		BKFileBuffer *	bkFile,
		s32	bankIndex,
		BankSet	bankSet )

Loads an instrument bank file from ROM, allocates memory if needed, and sets up instrument pointers.

Instruments in the bank will be configured to use DMA streaming for sample/codebook data. This is the standard loader for streamed instrument banks.

Referenced by au_load_aux_bank(), and au_load_BK_headers().

◆ au_load_INIT()

void au_load_INIT	(	AuGlobals *	arg0,
		s32	romAddr,
		ALHeap *	heap )

Referenced by au_engine_init().

◆ au_load_PER()

void au_load_PER	(	AuGlobals *	globals,
		s32	romAddr )

Referenced by au_engine_init().

◆ au_load_PRG()

void au_load_PRG	(	AuGlobals *	arg0,
		s32	romAddr )

Referenced by au_engine_init().

◆ au_load_song_files()

AuResult au_load_song_files	(	u32	arg0,
		BGMHeader *	arg1,
		BGMPlayer *	arg2 )

Referenced by snd_song_load().

◆ au_load_static_BK_to_bank()

BKFileBuffer * au_load_static_BK_to_bank	(	s32 *	inAddr,
		void *	outAddr,
		s32	bankIndex,
		BankSet	bankSet )

UNUSED Loads an instrument bank file from ROM to a given buffer (allocates if needed), and sets up instrument pointers.

Instruments are configured to always bypass DMA: sample and codebook data is assumed to be already present in RAM. Use this only for banks whose sample data is guaranteed to be preloaded, not for standard streaming.

◆ au_memset()

void au_memset	(	void *	dst,
		s32	size,
		u8	value )

Referenced by au_mseq_manager_init(), and au_mseq_play_sequence().

◆ au_pull_fx()

Acmd * au_pull_fx	(	AuFX *	fx,
		Acmd *	ptr,
		s16	wetDmem,
		s16	tempDmem )

Applies a chain of delay-line based effects to audio and mixes into output.

For each delay tap in the FX chain:

Loads delay input/output from circular buffer.
Applies optional modulation and resampling.
Applies feedforward/feedback mixing.
Applies optional lowpass filtering.
Mixes result into wet output buffer.

Parameters

fx	Pointer to FX state (delay taps, buffers, etc.)
ptr	Pointer to the current audio command list position.
wetDmem	DMEM offset to mix wet output into.
tempDmem	Base DMEM offset for temporary working buffers.

Returns: Updated command list pointer.

Referenced by alAudioFrame().

◆ au_pull_voice()

Acmd * au_pull_voice	(	AuPVoice *	pvoice,
		Acmd *	cmdBufPos )

Referenced by alAudioFrame().

◆ au_pvoice_set_bus()

void au_pvoice_set_bus	(	u8	voiceIdx,
		s8	busID )

Referenced by au_engine_init().

◆ au_read_rom()

void au_read_rom	(	s32	romAddr,
		void *	buffer,
		u32	size )

Referenced by au_ambient_load(), au_engine_init(), au_load_BK_headers(), au_load_BK_to_bank(), au_load_INIT(), au_load_PER(), au_load_PRG(), au_load_song_files(), au_load_static_BK_to_bank(), and au_reload_song_files().

◆ au_release_voice()

void au_release_voice ( u8 index )

Referenced by au_pull_voice().

◆ au_reload_song_files()

AuResult au_reload_song_files	(	s32	songID,
		BGMHeader *	arg1 )

Referenced by au_bgm_process_resume().

◆ au_reset_nonfree_voice()

void au_reset_nonfree_voice	(	AuVoice *	arg0,
		u8	arg1 )

◆ au_reset_voice()

void au_reset_voice	(	AuVoice *	voice,
		u8	voiceIdx )

Referenced by au_bgm_player_update_playing(), au_bgm_reset_all_voices(), au_BGMCmd_FC_Branch(), au_mseq_player_stop(), au_mseq_player_update(), and au_mseq_restore_voices().

◆ au_set_bus_volume_level()

void au_set_bus_volume_level	(	s32	arg0,
		u32	idx )

Referenced by snd_set_bgm_volume(), and snd_set_sfx_volume().

◆ au_set_delay_time()

void au_set_delay_time ( s32 arg0 )

Referenced by au_syn_begin_audio_frame().

◆ au_set_global_volume()

void au_set_global_volume ( s16 arg0 )

Referenced by nuAuPreNMIProc().

◆ au_set_reverb_type()

s32 au_set_reverb_type	(	s32	arg0,
		s32	arg1 )

Referenced by snd_set_sfx_reverb_type().

◆ au_set_stereo_enabled()

void au_set_stereo_enabled ( b8 enabled )

Referenced by snd_set_mono(), and snd_set_stereo().

◆ au_swizzle_BK_instruments()

void au_swizzle_BK_instruments	(	s32	bkFileOffset,
		BKFileBuffer *	file,
		InstrumentBank	instruments,
		u32	instrumentCount,
		u8	useDma )

Fixes up (swizzles) instrument pointers in a loaded bank, converting file-relative offsets to valid RAM pointers.

Sets whether each instrument uses DMA streaming or not, and updates pitch ratios to match output rate. Replaces nullptr instruments with a default instrument to ensure all loaded patches point to valid data.

Referenced by au_load_BK_to_bank(), and au_load_static_BK_to_bank().

◆ au_syn_begin_audio_frame()

void au_syn_begin_audio_frame ( AuGlobals * globals )

Referenced by au_update_clients_for_audio_frame().

◆ au_syn_get_bus()

s32 au_syn_get_bus ( u8 voiceIdx )

◆ au_syn_get_dryamt()

s16 au_syn_get_dryamt ( u8 voiceIdx )

◆ au_syn_get_pan()

u8 au_syn_get_pan ( u8 voiceIdx )

◆ au_syn_get_pitch()

f32 au_syn_get_pitch ( u8 voiceIdx )

◆ au_syn_get_playing()

s32 au_syn_get_playing ( u8 voiceIdx )

◆ au_syn_get_volume_left()

s32 au_syn_get_volume_left ( u8 voiceIdx )

◆ au_syn_get_volume_right()

s32 au_syn_get_volume_right ( u8 voiceIdx )

◆ au_syn_get_wetamt()

s16 au_syn_get_wetamt ( u8 voiceIdx )

◆ au_syn_set_fxmix()

void au_syn_set_fxmix	(	u8	voiceIdx,
		u8	dryAmt )

◆ au_syn_set_mixer_params()

void au_syn_set_mixer_params	(	u8	voiceIdx,
		s16	volume,
		s32	arg2,
		u8	arg3,
		u8	arg4 )

Referenced by au_syn_begin_audio_frame().

◆ au_syn_set_pan()

void au_syn_set_pan	(	u8	voiceIdx,
		u8	pan )

Referenced by alAudioFrame().

◆ au_syn_set_pan_fxmix()

void au_syn_set_pan_fxmix	(	u8	voiceIdx,
		u8	arg1,
		u8	arg2 )

Referenced by au_syn_begin_audio_frame().

◆ au_syn_set_pitch()

void au_syn_set_pitch	(	u8	voiceIdx,
		f32	pitchRatio )

Referenced by au_syn_begin_audio_frame().

◆ au_syn_set_volume_delta()

void au_syn_set_volume_delta	(	u8	voiceIdx,
		s16	arg1,
		s32	arg2 )

Referenced by au_reset_nonfree_voice(), and au_reset_voice().

◆ au_syn_set_wavetable()

void au_syn_set_wavetable	(	u8	voiceIdx,
		Instrument *	table )

Referenced by au_engine_init().

◆ au_syn_start_voice()

void au_syn_start_voice ( u8 index )

◆ au_syn_start_voice_params()

void au_syn_start_voice_params	(	u8	index,
		u8	reverbType,
		Instrument *	table,
		f32	pitch,
		s16	vol,
		u8	pan,
		u8	fxMix,
		s32	delta )

Referenced by au_syn_begin_audio_frame().

◆ au_syn_stop_voice()

void au_syn_stop_voice ( u8 voiceIdx )

Referenced by au_flush_finished_voices(), and au_syn_begin_audio_frame().

◆ au_sync_channel_delay_enabled()

void au_sync_channel_delay_enabled ( u32 arg0 )

Referenced by snd_set_mono(), and snd_set_stereo().

◆ au_update_clients_for_audio_frame()

void au_update_clients_for_audio_frame ( void )

this is called per audio frame generated by alAudioFrame (every 184 audio samples) there will be multiuple of these per video frame

Updates MSEQ, SFX, and BGM players for the current audio frame.

Referenced by alAudioFrame().

◆ au_update_clients_for_video_frame()

void au_update_clients_for_video_frame ( void )

this is called once per video frame update (50 or 60 times per second)

Referenced by alAudioFrame().

◆ au_update_voices()

void au_update_voices ( AuGlobals * globals )

Main envelope system update, called once per frame.

Progresses envelope state for all active voices.

Referenced by au_update_clients_for_audio_frame().

◆ au_use_global_volume()

void au_use_global_volume ( void )

Referenced by nuAuPreNMIProc().

◆ au_voice_after_volume_change()

void au_voice_after_volume_change ( AuVoice * voice )

Applies volume update after a client-side volume change.

This is deferred to avoid modifying envelope state mid-step.

Referenced by au_update_voices().

◆ au_voice_get_delta()

s32 au_voice_get_delta ( s32 usecs )

Converts envelope step duration from microseconds to num samples delta.

Uses AU_FRAME_USEC as the base time slice, returning the number of audio samples corresponding to the provided duration.

Parameters

msecs Time duration in microseconds.

Returns: Number of samples that should pass in this interval.

Referenced by au_update_voices(), au_voice_after_volume_change(), and au_voice_start().

◆ au_voice_set_vol_changed()

void au_voice_set_vol_changed ( AuVoice * voice )

(UNUSED) Force recalculation of voice envelope volume during next update.

◆ au_voice_start()

void au_voice_start	(	AuVoice *	voice,
		EnvelopeData *	envData )

Starts a new voice with the given envelope data.

Initializes envelope state and prepares the press phase for playback.

Parameters

voice	Pointer to the voice being started.
envData	Envelope command lists (press and release) to use.

Referenced by au_syn_begin_audio_frame().

◆ au_voice_step()

u8 au_voice_step ( AuVoice * voice )

Parses and executes envelope commands until a time interval is found.

Commands include setting multipliers, loop control, etc.

Referenced by au_update_voices(), and au_voice_start().

◆ create_audio_system()

void create_audio_system ( void )

Referenced by create_audio_system_obfuscated().

◆ nuAuDmaCallBack()

s32 nuAuDmaCallBack	(	s32	addr,
		s32	len,
		void *	state,
		u8	useDma )

DMA callback for audio sample streaming; manages a DMA buffer cache.

Referenced by nuAuDmaNew().

◆ nuAuMgr()

void nuAuMgr ( void * arg )

Referenced by create_audio_system().

papermario Decompilation of Paper Mario

Functions

Function Documentation

◆ alHeapAlloc()

◆ au_ambient_load()

◆ au_bus_get_volume()

◆ au_bus_set_effect()

◆ au_bus_set_fx_params()

◆ au_bus_set_volume()

◆ au_clear_instrument_group()

◆ au_compute_pitch_ratio()

◆ au_copy_bytes()

◆ au_copy_words()

◆ au_delay_left_channel()

◆ au_delay_right_channel()

◆ au_disable_channel_delay()

◆ au_driver_init()

◆ au_driver_release()

◆ au_engine_init()

◆ au_fade_calc_envelope()

◆ au_fade_clear()

◆ au_fade_flush()

◆ au_fade_init()

◆ au_fade_set_envelope()

◆ au_fade_set_volume()

◆ au_fade_update()

◆ au_fade_update_envelope()

◆ au_fetch_SBN_file()

◆ au_filter_create()

◆ au_filter_init()

◆ au_flush_finished_voices()

◆ au_fx_create()

◆ au_fx_load_preset()

◆ au_fx_param_hdl()

◆ au_get_bgm_player()

◆ au_get_bgm_player_and_file()

◆ au_get_BK_instruments()

◆ au_get_client_by_priority()

◆ au_get_global_volume()

◆ au_get_instrument()

◆ au_get_snapshot_by_index()

◆ au_init_delay_channel()

◆ au_init_voices()

◆ au_load_aux_bank()

◆ au_load_BK_to_bank()

◆ au_load_INIT()

◆ au_load_PER()

◆ au_load_PRG()

◆ au_load_song_files()

◆ au_load_static_BK_to_bank()

◆ au_memset()

◆ au_pull_fx()

◆ au_pull_voice()

◆ au_pvoice_set_bus()

◆ au_read_rom()

◆ au_release_voice()

◆ au_reload_song_files()

◆ au_reset_nonfree_voice()

◆ au_reset_voice()

◆ au_set_bus_volume_level()

◆ au_set_delay_time()

◆ au_set_global_volume()

◆ au_set_reverb_type()

◆ au_set_stereo_enabled()

◆ au_swizzle_BK_instruments()

◆ au_syn_begin_audio_frame()

◆ au_syn_get_bus()

◆ au_syn_get_dryamt()

◆ au_syn_get_pan()

◆ au_syn_get_pitch()

◆ au_syn_get_playing()

◆ au_syn_get_volume_left()

◆ au_syn_get_volume_right()

◆ au_syn_get_wetamt()

◆ au_syn_set_fxmix()

◆ au_syn_set_mixer_params()

◆ au_syn_set_pan()

◆ au_syn_set_pan_fxmix()

◆ au_syn_set_pitch()

◆ au_syn_set_volume_delta()

◆ au_syn_set_wavetable()