Low-level sound support and memory management. More...

#include <sys/cdefs.h>
#include <arch/types.h>
#include <stdint.h>
#include <stdbool.h>

Functions
uint32	snd_mem_malloc (size_t size)
	Allocate memory in the SPU RAM pool.

void	snd_mem_free (uint32 addr)
	Free a block of allocated memory in the SPU RAM pool.

uint32	snd_mem_available (void)
	Get the size of the largest allocateable block in the SPU RAM pool.

int	snd_mem_init (uint32 reserve)
	Reinitialize the SPU RAM pool.

void	snd_mem_shutdown (void)
	Shutdown the SPU RAM allocator.

int	snd_init (void)
	Initialize the sound system.

void	snd_shutdown (void)
	Shut down the sound system.

int	snd_sh4_to_aica (void *packet, uint32 size)
	Copy a request packet to the AICA queue.

void	snd_sh4_to_aica_start (void)
	Begin processing AICA queue requests.

void	snd_sh4_to_aica_stop (void)
	Stop processing AICA queue requests.

int	snd_aica_to_sh4 (void *packetout)
	Transfer a packet of data from the AICA's SH4 queue.

void	snd_poll_resp (void)
	Poll for a response from the AICA.

void	snd_pcm16_split (uint32_t data, uint32_t left, uint32_t *right, size_t size)
	Separates stereo PCM samples into 2 mono channels.

void	snd_pcm16_split_sq (uint32_t *data, uintptr_t left, uintptr_t right, size_t size)
	Separates stereo PCM samples into 2 mono channels with SQ transfer.

void	snd_pcm8_split (uint32_t data, uint32_t left, uint32_t *right, size_t size)
	Separates stereo PCM samples into 2 mono channels.

void	snd_adpcm_split (uint32_t data, uint32_t left, uint32_t *right, size_t size)
	Separates stereo ADPCM samples into 2 mono channels.

uint16_t	snd_get_pos (unsigned int ch)
	Get AICA channel position.

bool	snd_is_playing (unsigned int ch)
	Get AICA channel playback state.

Detailed Description

Low-level sound support and memory management.

This file contains declarations for low-level sound operations and for SPU RAM pool memory management. Most of the time you'll be better off using the higher-level functionality in the sound effect support or streaming support, but this stuff can be very useful for some things.

Author: Megan Potter; Ruslan Rostovtsev

Function Documentation

◆ snd_get_pos()

uint16_t snd_get_pos ( unsigned int ch )

Get AICA channel position.

This function returns actual the channel position that stores in SPU memory and updated by the SPU firmware.

Parameters

chn	The channel to retrieve position.

Returns: Last channel position in samples.

◆ snd_is_playing()

bool snd_is_playing ( unsigned int ch )

Get AICA channel playback state.

This function returns actual the channel playback state that stores in AICA registers directly.

Parameters

chn	The channel to check.

Returns: True if the channel is playing.

Functions

Detailed Description

Function Documentation

◆ snd_get_pos()

◆ snd_is_playing()