adpcm.c File Reference

#include <stdio.h>
#include <thbase.h>
#include <thsemap.h>
#include <loadcore.h>
#include <sysmem.h>
#include <intrman.h>
#include <libsd.h>
#include <sysclib.h>
#include <audsrv.h>
#include "audsrv_internal.h"
#include "common.h"
#include "rpc_server.h"
#include "spu.h"
#include "debug_printf.h"

Include dependency graph for adpcm.c:

Go to the source code of this file.

Data Structures
struct	adpcm_list_t

Typedefs
typedef struct adpcm_list_t	adpcm_list_t

Functions
static u32 sbuffer[16]	__attribute__ ((aligned(16)))
static adpcm_list_t *	alloc_new_sample (void)
static void	free_all_samples ()
int	free_sample (u32 id)
static adpcm_list_t *	adpcm_loaded (int id)
static void	audsrv_read_adpcm_header (adpcm_list_t *adpcm, const u32 *buffer)
void *	audsrv_load_adpcm (u32 *buffer, int size, int id)
int	audsrv_is_adpcm_playing (int ch, u32 id)
static int	audsrv_adpcm_alloc_channel (void)
int	audsrv_ch_play_adpcm (int ch, u32 id)
int	audsrv_adpcm_init ()
int	audsrv_adpcm_set_volume (int ch, int voll, int volr)

Variables
static adpcm_list_t *	adpcm_list_head = 0
static adpcm_list_t *	adpcm_list_tail = 0

Detailed Description

audsrv adpcm module

Definition in file adpcm.c.

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Data Structure Documentation

adpcm_list_t

struct adpcm_list_t

Definition at line 31 of file adpcm.c.

Collaboration diagram for adpcm_list_t:

Data Fields
struct adpcm_list_t *	next
int	id
int	pitch
int	loop
int	channels
int	size
int	spu2_addr

Function Documentation

alloc_new_sample()

static adpcm_list_t * alloc_new_sample ( void  )

static

Allocates memory for a new sample.

Definition at line 49 of file adpcm.c.

References CpuResumeIntr(), and CpuSuspendIntr().

Referenced by audsrv_load_adpcm().

free_all_samples()

static void free_all_samples ( )

static

Frees up all memory taken by the linked list of samples

Definition at line 62 of file adpcm.c.

References CpuResumeIntr(), and CpuSuspendIntr().

Referenced by audsrv_adpcm_init().

free_sample()

int free_sample

(

u32

id

)

Remove an adpcm sample uploaded with audsrv_load_adpcm() from the list of loaded sounds

Parameters

id	sample identifier, as specified in load()

SPU memory is freed only when there are no sounds in the list that where loaded after the ones that have been freed

Definition at line 84 of file adpcm.c.

References AUDSRV_ERR_NOERROR, CpuResumeIntr(), and CpuSuspendIntr().

Referenced by rpc_command().

adpcm_loaded()

static adpcm_list_t * adpcm_loaded ( int  id )

static

Looks up the given identifier in list of loaded samples

Parameters

id	sample identifier

Returns

node entry from container, NULL on failure

Definition at line 126 of file adpcm.c.

Referenced by audsrv_ch_play_adpcm(), and audsrv_load_adpcm().

audsrv_read_adpcm_header()

static void audsrv_read_adpcm_header ( adpcm_list_t *  adpcm, const u32 *  buffer  )

static

Extracts adpcm parameters from header

Parameters

adpcm	node entry
buffer	pointer to adpcm header

Definition at line 147 of file adpcm.c.

Referenced by audsrv_load_adpcm().

audsrv_load_adpcm()

void * audsrv_load_adpcm	(	u32 *	buffer,
		int	size,
		int	id
	)

Uploads a sample to SPU2 memory

Parameters

buffer	pointer to adpcm sample header
size	size of sample in bytes
id	sample identifier (to be later used in play())

Returns

pointer to local adpcm buffer

Definition at line 160 of file adpcm.c.

References adpcm_loaded(), alloc_new_sample(), and audsrv_read_adpcm_header().

audsrv_is_adpcm_playing()

int audsrv_is_adpcm_playing	(	int	ch,
		u32	id
	)

Definition at line 211 of file adpcm.c.

audsrv_adpcm_alloc_channel()

static int audsrv_adpcm_alloc_channel ( void  )

static

Definition at line 233 of file adpcm.c.

audsrv_ch_play_adpcm()

int audsrv_ch_play_adpcm	(	int	ch,
		u32	id
	)

Plays an adpcm sample already uploaded with audsrv_load_adpcm()

Parameters

ch	channel identifier. Specifies one of the 24 voice channel to play the ADPCM channel on. If set to an invalid channel ID, an unoccupied channel will be selected.
id	sample identifier, as specified in load()

Returns

channel identifier on success, negative value on error

When ch is set to an invalid channel ID, the sample will be played in an unoccupied channel. If all 24 channels are used, then -AUDSRV_ERR_NO_MORE_CHANNELS is returned. When ch is set to a valid channel ID, -AUDSRV_ERR_NO_MORE_CHANNELS is returned if the channel is currently in use. Trying to play a sample which is unavailable will result in -AUDSRV_ERR_ARGS

Definition at line 277 of file adpcm.c.

References adpcm_loaded().

audsrv_adpcm_init()

int audsrv_adpcm_init

(

)

Initializes adpcm unit of audsrv

Returns

zero on success, negative value on error

Definition at line 319 of file adpcm.c.

References AUDSRV_ERR_NOERROR, AUDSRV_INIT_ADPCM, call_rpc_1(), and free_all_samples().

Referenced by _start(), audsrv_quit(), and rpc_command().

audsrv_adpcm_set_volume()

int audsrv_adpcm_set_volume	(	int	ch,
		int	voll,
		int	volr
	)

Sets output volume for the specified voice channel.

Parameters

ch	Voice channel ID
voll	left volume in SPU2 units [0 .. 0x3fff]
volr	right volume in SPU2 units [0 .. 0x3fff]

Returns

0 on success, negative otherwise

Definition at line 347 of file adpcm.c.

References AUDSRV_ERR_NOERROR, and MAX_VOLUME.

Variable Documentation

adpcm_list_head

adpcm_list_t* adpcm_list_head = 0

static

Definition at line 43 of file adpcm.c.

adpcm_list_tail

adpcm_list_t* adpcm_list_tail = 0

static

Definition at line 44 of file adpcm.c.