Macros
#define	SND_HWDEP_DLSYM_VERSION _dlsym_hwdep_001
#define	SND_HWDEP_OPEN_READ (O_RDONLY)
#define	SND_HWDEP_OPEN_WRITE (O_WRONLY)
#define	SND_HWDEP_OPEN_DUPLEX (O_RDWR)
#define	SND_HWDEP_OPEN_NONBLOCK (O_NONBLOCK)
#define	snd_hwdep_info_alloca(ptr) __snd_alloca(ptr, snd_hwdep_info)
#define	snd_hwdep_dsp_status_alloca(ptr) __snd_alloca(ptr, snd_hwdep_dsp_status)
#define	snd_hwdep_dsp_image_alloca(ptr) __snd_alloca(ptr, snd_hwdep_dsp_image)

Typedefs
typedef struct _snd_hwdep_info	snd_hwdep_info_t
typedef struct _snd_hwdep_dsp_status	snd_hwdep_dsp_status_t
typedef struct _snd_hwdep_dsp_image	snd_hwdep_dsp_image_t
typedef struct _snd_hwdep	snd_hwdep_t

Functions
int	snd_hwdep_open (snd_hwdep_t *hwdep, const char name, int mode)
	Opens a new connection to the HwDep interface.
int	snd_hwdep_close (snd_hwdep_t *hwdep)
	close HwDep handle
int	snd_hwdep_poll_descriptors (snd_hwdep_t hwdep, struct pollfd pfds, unsigned int space)
	get poll descriptors
int	snd_hwdep_poll_descriptors_revents (snd_hwdep_t hwdep, struct pollfd pfds, unsigned int nfds, unsigned short *revents)
	get returned events from poll descriptors
int	snd_hwdep_nonblock (snd_hwdep_t *hwdep, int nonblock)
	set nonblock mode
int	snd_hwdep_info (snd_hwdep_t hwdep, snd_hwdep_info_t info)
	get information about HwDep handle
int	snd_hwdep_dsp_status (snd_hwdep_t hwdep, snd_hwdep_dsp_status_t status)
	get the DSP status information
int	snd_hwdep_dsp_load (snd_hwdep_t hwdep, snd_hwdep_dsp_image_t block)
	load the DSP block
int	snd_hwdep_ioctl (snd_hwdep_t hwdep, unsigned int request, void arg)
	do hardware dependent ioctl
ssize_t	snd_hwdep_write (snd_hwdep_t hwdep, const void buffer, size_t size)
	write bytes using HwDep handle
ssize_t	snd_hwdep_read (snd_hwdep_t hwdep, void buffer, size_t size)
	read bytes using HwDep handle
size_t	snd_hwdep_info_sizeof (void)
	get size of the snd_hwdep_info_t structure in bytes
int	snd_hwdep_info_malloc (snd_hwdep_info_t **ptr)
	allocate a new snd_hwdep_info_t structure
void	snd_hwdep_info_free (snd_hwdep_info_t *obj)
	frees the snd_hwdep_info_t structure
void	snd_hwdep_info_copy (snd_hwdep_info_t dst, const snd_hwdep_info_t src)
	copy one snd_hwdep_info_t structure to another
unsigned int	snd_hwdep_info_get_device (const snd_hwdep_info_t *obj)
	get hwdep device number
int	snd_hwdep_info_get_card (const snd_hwdep_info_t *obj)
	get hwdep card number
const char *	snd_hwdep_info_get_id (const snd_hwdep_info_t *obj)
	get hwdep driver identifier
const char *	snd_hwdep_info_get_name (const snd_hwdep_info_t *obj)
	get hwdep driver name
snd_hwdep_iface_t	snd_hwdep_info_get_iface (const snd_hwdep_info_t *obj)
	get hwdep protocol interface
void	snd_hwdep_info_set_device (snd_hwdep_info_t *obj, unsigned int val)
	set hwdep device number
size_t	snd_hwdep_dsp_status_sizeof (void)
	get size of the snd_hwdep_dsp_status_t structure in bytes
int	snd_hwdep_dsp_status_malloc (snd_hwdep_dsp_status_t **ptr)
	allocate a new snd_hwdep_dsp_status_t structure
void	snd_hwdep_dsp_status_free (snd_hwdep_dsp_status_t *obj)
	frees the snd_hwdep_dsp_status_t structure
void	snd_hwdep_dsp_status_copy (snd_hwdep_dsp_status_t dst, const snd_hwdep_dsp_status_t src)
	copy one snd_hwdep_dsp_status_t structure to another
unsigned int	snd_hwdep_dsp_status_get_version (const snd_hwdep_dsp_status_t *obj)
	get the driver version of dsp loader
const char *	snd_hwdep_dsp_status_get_id (const snd_hwdep_dsp_status_t *obj)
	get the driver id of dsp loader
unsigned int	snd_hwdep_dsp_status_get_num_dsps (const snd_hwdep_dsp_status_t *obj)
	get number of dsp blocks
unsigned int	snd_hwdep_dsp_status_get_dsp_loaded (const snd_hwdep_dsp_status_t *obj)
	get the bit flags of the loaded dsp blocks
unsigned int	snd_hwdep_dsp_status_get_chip_ready (const snd_hwdep_dsp_status_t *obj)
	get the chip status of dsp loader
size_t	snd_hwdep_dsp_image_sizeof (void)
	get size of the snd_hwdep_dsp_image_t structure in bytes
int	snd_hwdep_dsp_image_malloc (snd_hwdep_dsp_image_t **ptr)
	allocate a new snd_hwdep_dsp_image_t structure
void	snd_hwdep_dsp_image_free (snd_hwdep_dsp_image_t *obj)
	frees the snd_hwdep_dsp_image_t structure
void	snd_hwdep_dsp_image_copy (snd_hwdep_dsp_image_t dst, const snd_hwdep_dsp_image_t src)
	copy one snd_hwdep_dsp_image_t structure to another
unsigned int	snd_hwdep_dsp_image_get_index (const snd_hwdep_dsp_image_t *obj)
	get the DSP block index
const char *	snd_hwdep_dsp_image_get_name (const snd_hwdep_dsp_image_t *obj)
	get the name of the DSP block
const void *	snd_hwdep_dsp_image_get_image (const snd_hwdep_dsp_image_t *obj)
	get the image pointer of the DSP block
size_t	snd_hwdep_dsp_image_get_length (const snd_hwdep_dsp_image_t *obj)
	get the length of the DSP block
void	snd_hwdep_dsp_image_set_index (snd_hwdep_dsp_image_t *obj, unsigned int _index)
	set the DSP block index
void	snd_hwdep_dsp_image_set_name (snd_hwdep_dsp_image_t obj, const char name)
	set the name of the DSP block
void	snd_hwdep_dsp_image_set_image (snd_hwdep_dsp_image_t obj, void buffer)
	set the DSP block image pointer
void	snd_hwdep_dsp_image_set_length (snd_hwdep_dsp_image_t *obj, size_t length)
	set the DSP block length

Detailed Description

The Hardware Dependant Interface.

Macro Definition Documentation

#define SND_HWDEP_DLSYM_VERSION _dlsym_hwdep_001

dlsym version for interface entry callback

#define snd_hwdep_dsp_image_alloca ( ptr ) __snd_alloca(ptr, snd_hwdep_dsp_image)

allocate snd_hwdep_dsp_image_t container on stack

#define snd_hwdep_dsp_status_alloca ( ptr ) __snd_alloca(ptr, snd_hwdep_dsp_status)

allocate snd_hwdep_dsp_status_t container on stack

#define snd_hwdep_info_alloca ( ptr ) __snd_alloca(ptr, snd_hwdep_info)

allocate snd_hwdep_info_t container on stack

#define SND_HWDEP_OPEN_DUPLEX (O_RDWR)

open for reading and writing

#define SND_HWDEP_OPEN_NONBLOCK (O_NONBLOCK)

open mode flag: open in nonblock mode

#define SND_HWDEP_OPEN_READ (O_RDONLY)

open for reading

#define SND_HWDEP_OPEN_WRITE (O_WRONLY)

open for writing

Typedef Documentation

typedef struct _snd_hwdep_dsp_image snd_hwdep_dsp_image_t

HwDep DSP image container

typedef struct _snd_hwdep_dsp_status snd_hwdep_dsp_status_t

HwDep DSP status container

typedef struct _snd_hwdep_info snd_hwdep_info_t

HwDep information container

typedef struct _snd_hwdep snd_hwdep_t

HwDep handle

Enumeration Type Documentation

enum snd_hwdep_iface_t

HwDep interface

Enumerator:

SND_HWDEP_IFACE_OPL2	OPL2 raw driver
SND_HWDEP_IFACE_OPL3	OPL3 raw driver
SND_HWDEP_IFACE_OPL4	OPL4 raw driver
SND_HWDEP_IFACE_SB16CSP	SB16CSP driver
SND_HWDEP_IFACE_EMU10K1	EMU10K1 driver
SND_HWDEP_IFACE_YSS225	YSS225 driver
SND_HWDEP_IFACE_ICS2115	ICS2115 driver
SND_HWDEP_IFACE_SSCAPE	Ensoniq SoundScape ISA card (MC68EC000)
SND_HWDEP_IFACE_VX	Digigram VX cards
SND_HWDEP_IFACE_MIXART	Digigram miXart cards
SND_HWDEP_IFACE_USX2Y	Tascam US122, US224 & US428 usb
SND_HWDEP_IFACE_EMUX_WAVETABLE	EmuX wavetable
SND_HWDEP_IFACE_BLUETOOTH	Bluetooth audio
SND_HWDEP_IFACE_USX2Y_PCM	Tascam US122, US224 & US428 raw USB PCM
SND_HWDEP_IFACE_PCXHR	Digigram PCXHR
SND_HWDEP_IFACE_SB_RC	SB Extigy/Audigy2NX remote control
SND_HWDEP_IFACE_LAST	last known hwdep interface

enum snd_hwdep_type_t

HwDep handle type

Enumerator:

SND_HWDEP_TYPE_HW	Kernel level HwDep
SND_HWDEP_TYPE_SHM	Shared memory client HwDep (not yet implemented)
SND_HWDEP_TYPE_INET	INET client HwDep (not yet implemented)

Function Documentation

int snd_hwdep_close ( snd_hwdep_t * hwdep )

close HwDep handle

Parameters

hwdep HwDep handle

Returns: 0 on success otherwise a negative error code

Closes the specified HwDep handle and frees all associated resources.

void snd_hwdep_dsp_image_copy	(	snd_hwdep_dsp_image_t *	dst,
		const snd_hwdep_dsp_image_t *	src
	)

copy one snd_hwdep_dsp_image_t structure to another

Parameters

dst	destination snd_hwdep_dsp_image_t structure
src	source snd_hwdep_dsp_image_t structure

void snd_hwdep_dsp_image_free ( snd_hwdep_dsp_image_t * info )

frees the snd_hwdep_dsp_image_t structure

Parameters

info	pointer to the snd_hwdep_dsp_image_t structure to free

Frees the given snd_hwdep_dsp_image_t structure using the standard free C library function.

const void* snd_hwdep_dsp_image_get_image ( const snd_hwdep_dsp_image_t * obj )

get the image pointer of the DSP block

Parameters

obj	pointer to a snd_hwdep_dsp_image_t structure

Returns: the image pointer of the DSP block

unsigned int snd_hwdep_dsp_image_get_index ( const snd_hwdep_dsp_image_t * obj )

get the DSP block index

Parameters

obj	pointer to a snd_hwdep_dsp_image_t structure

Returns: the index of the DSP block

size_t snd_hwdep_dsp_image_get_length ( const snd_hwdep_dsp_image_t * obj )

get the length of the DSP block

Parameters

obj	pointer to a snd_hwdep_dsp_image_t structure

Returns: the length of the DSP block in bytes

const char* snd_hwdep_dsp_image_get_name ( const snd_hwdep_dsp_image_t * obj )

get the name of the DSP block

Parameters

obj	pointer to a snd_hwdep_dsp_image_t structure

Returns: the name string of the DSP block

int snd_hwdep_dsp_image_malloc ( snd_hwdep_dsp_image_t ** info )

allocate a new snd_hwdep_dsp_image_t structure

Parameters

info	returned pointer

Returns: 0 on success otherwise a negative error code if fails

Allocates a new snd_hwdep_dsp_image_t structure using the standard malloc C library function.

void snd_hwdep_dsp_image_set_image	(	snd_hwdep_dsp_image_t *	obj,
		void *	image
	)

set the DSP block image pointer

Parameters

obj	pointer to a snd_hwdep_dsp_image_t structure
image	the DSP image pointer

void snd_hwdep_dsp_image_set_index	(	snd_hwdep_dsp_image_t *	obj,
		unsigned int	index
	)

set the DSP block index

Parameters

obj	pointer to a snd_hwdep_dsp_image_t structure
index	the index value to set

void snd_hwdep_dsp_image_set_length	(	snd_hwdep_dsp_image_t *	obj,
		size_t	length
	)

set the DSP block length

Parameters

obj	pointer to a snd_hwdep_dsp_image_t structure
length	the length of the DSP block

void snd_hwdep_dsp_image_set_name	(	snd_hwdep_dsp_image_t *	obj,
		const char *	name
	)

set the name of the DSP block

Parameters

obj	pointer to a snd_hwdep_dsp_image_t structure
name	the name string

size_t snd_hwdep_dsp_image_sizeof ( void )

get size of the snd_hwdep_dsp_image_t structure in bytes

Returns: size of the snd_hwdep_dsp_image_t structure in bytes

int snd_hwdep_dsp_load	(	snd_hwdep_t *	hwdep,
		snd_hwdep_dsp_image_t *	block
	)

load the DSP block

Parameters

hwdep	HwDep handle
block	pointer to a snd_hwdep_dsp_image_t structure to transfer

Returns: 0 on success otherwise a negative error code

int snd_hwdep_dsp_status	(	snd_hwdep_t *	hwdep,
		snd_hwdep_dsp_status_t *	info
	)

get the DSP status information

Parameters

hwdep	HwDep handle
info	pointer to a snd_hwdep_dsp_status_t structure to be filled

Returns: 0 on success otherwise a negative error code

void snd_hwdep_dsp_status_copy	(	snd_hwdep_dsp_status_t *	dst,
		const snd_hwdep_dsp_status_t *	src
	)

copy one snd_hwdep_dsp_status_t structure to another

Parameters

dst	destination snd_hwdep_dsp_status_t structure
src	source snd_hwdep_dsp_status_t structure

void snd_hwdep_dsp_status_free ( snd_hwdep_dsp_status_t * info )

frees the snd_hwdep_dsp_status_t structure

Parameters

info	pointer to the snd_hwdep_dsp_status_t structure to free

Frees the given snd_hwdep_dsp_status_t structure using the standard free C library function.

unsigned int snd_hwdep_dsp_status_get_chip_ready ( const snd_hwdep_dsp_status_t * obj )

get the chip status of dsp loader

Parameters

obj	pointer to a snd_hwdep_dsp_status_t structure

Returns: non-zero if all DSP blocks are loaded and the chip is ready

unsigned int snd_hwdep_dsp_status_get_dsp_loaded ( const snd_hwdep_dsp_status_t * info )

get the bit flags of the loaded dsp blocks

Parameters

info	pointer to a snd_hwdep_dsp_status_t structure

Returns: the big flags of the loaded dsp blocks

const char* snd_hwdep_dsp_status_get_id ( const snd_hwdep_dsp_status_t * obj )

get the driver id of dsp loader

Parameters

obj	pointer to a snd_hwdep_dsp_status_t structure

Returns: the driver id string

unsigned int snd_hwdep_dsp_status_get_num_dsps ( const snd_hwdep_dsp_status_t * obj )

get number of dsp blocks

Parameters

obj	pointer to a snd_hwdep_dsp_status_t structure

Returns: number of dsp blocks

unsigned int snd_hwdep_dsp_status_get_version ( const snd_hwdep_dsp_status_t * obj )

get the driver version of dsp loader

Parameters

obj	pointer to a snd_hwdep_dsp_status_t structure

Returns: the driver version

int snd_hwdep_dsp_status_malloc ( snd_hwdep_dsp_status_t ** info )

allocate a new snd_hwdep_dsp_status_t structure

Parameters

info	returned pointer

Returns: 0 on success otherwise a negative error code if fails

Allocates a new snd_hwdep_dsp_status_t structure using the standard malloc C library function.

size_t snd_hwdep_dsp_status_sizeof ( void )

get size of the snd_hwdep_dsp_status_t structure in bytes

Returns: size of the snd_hwdep_dsp_status_t structure in bytes

int snd_hwdep_info	(	snd_hwdep_t *	hwdep,
		snd_hwdep_info_t *	info
	)

get information about HwDep handle

Parameters

hwdep	HwDep handle
info	pointer to a snd_hwdep_info_t structure to be filled

Returns: 0 on success otherwise a negative error code

void snd_hwdep_info_copy	(	snd_hwdep_info_t *	dst,
		const snd_hwdep_info_t *	src
	)

copy one snd_hwdep_info_t structure to another

Parameters

dst	destination snd_hwdep_info_t structure
src	source snd_hwdep_info_t structure

void snd_hwdep_info_free ( snd_hwdep_info_t * info )

frees the snd_hwdep_info_t structure

Parameters

info	pointer to the snd_hwdep_info_t structure to free

Frees the given snd_hwdep_info_t structure using the standard free C library function.

int snd_hwdep_info_get_card ( const snd_hwdep_info_t * obj )

get hwdep card number

Parameters

obj	pointer to a snd_hwdep_info_t structure

Returns: hwdep card number

unsigned int snd_hwdep_info_get_device ( const snd_hwdep_info_t * info )

get hwdep device number

Parameters

info	pointer to a snd_hwdep_info_t structure

Returns: hwdep device number

const char* snd_hwdep_info_get_id ( const snd_hwdep_info_t * obj )

get hwdep driver identifier

Parameters

obj	pointer to a snd_hwdep_info_t structure

Returns: hwdep driver identifier

snd_hwdep_iface_t snd_hwdep_info_get_iface ( const snd_hwdep_info_t * obj )

get hwdep protocol interface

Parameters

obj	pointer to a snd_hwdep_info_t structure

Returns: hwdep protocol interface

const char* snd_hwdep_info_get_name ( const snd_hwdep_info_t * obj )

get hwdep driver name

Parameters

obj	pointer to a snd_hwdep_info_t structure

Returns: hwdep driver name

int snd_hwdep_info_malloc ( snd_hwdep_info_t ** info )

allocate a new snd_hwdep_info_t structure

Parameters

info	returned pointer

Returns: 0 on success otherwise a negative error code if fails

Allocates a new snd_hwdep_info_t structure using the standard malloc C library function.

void snd_hwdep_info_set_device	(	snd_hwdep_info_t *	obj,
		unsigned int	val
	)

set hwdep device number

Parameters

obj	pointer to a snd_hwdep_info_t structure
val	hwdep device

size_t snd_hwdep_info_sizeof ( void )

get size of the snd_hwdep_info_t structure in bytes

Returns: size of the snd_hwdep_info_t structure in bytes

int snd_hwdep_ioctl	(	snd_hwdep_t *	hwdep,
		unsigned int	request,
		void *	arg
	)

do hardware dependent ioctl

Parameters

hwdep	HwDep handle
request	ioctl command
arg	ioctl argument

Returns: 0 on success otherwise a negative error code

int snd_hwdep_nonblock	(	snd_hwdep_t *	hwdep,
		int	nonblock
	)

set nonblock mode

Parameters

hwdep	HwDep handle
nonblock	0 = block, 1 = nonblock mode

Returns: 0 on success otherwise a negative error code

int snd_hwdep_open	(	snd_hwdep_t **	hwdep,
		const char *	name,
		int	mode
	)

Opens a new connection to the HwDep interface.

Parameters

hwdep	Returned handle (NULL if not wanted)
name	ASCII identifier of the HwDep handle
mode	Open mode

Returns: 0 on success otherwise a negative error code

Opens a new connection to the HwDep interface specified with an ASCII identifier and mode.

int snd_hwdep_poll_descriptors	(	snd_hwdep_t *	hwdep,
		struct pollfd *	pfds,
		unsigned int	space
	)

get poll descriptors

Parameters

hwdep	HwDep handle
pfds	array of poll descriptors
space	space in the poll descriptor array

Returns: count of filled descriptors

int snd_hwdep_poll_descriptors_revents	(	snd_hwdep_t *	hwdep,
		struct pollfd *	pfds,
		unsigned int	nfds,
		unsigned short *	revents
	)

get returned events from poll descriptors

Parameters

hwdep	HwDep handle
pfds	array of poll descriptors
nfds	count of poll descriptors
revents	returned events

Returns: zero if success, otherwise a negative error code

ssize_t snd_hwdep_read	(	snd_hwdep_t *	hwdep,
		void *	buffer,
		size_t	size
	)

read bytes using HwDep handle

Parameters

hwdep	HwDep handle
buffer	buffer to store the input bytes
size	input buffer size in bytes

ssize_t snd_hwdep_write	(	snd_hwdep_t *	hwdep,
		const void *	buffer,
		size_t	size
	)

write bytes using HwDep handle

Parameters

hwdep	HwDep handle
buffer	buffer containing bytes to write
size	output buffer size in bytes

Enumerations
enum	snd_hwdep_iface_t { SND_HWDEP_IFACE_OPL2 = 0, SND_HWDEP_IFACE_OPL3, SND_HWDEP_IFACE_OPL4, SND_HWDEP_IFACE_SB16CSP, SND_HWDEP_IFACE_EMU10K1, SND_HWDEP_IFACE_YSS225, SND_HWDEP_IFACE_ICS2115, SND_HWDEP_IFACE_SSCAPE, SND_HWDEP_IFACE_VX, SND_HWDEP_IFACE_MIXART, SND_HWDEP_IFACE_USX2Y, SND_HWDEP_IFACE_EMUX_WAVETABLE, SND_HWDEP_IFACE_BLUETOOTH, SND_HWDEP_IFACE_USX2Y_PCM, SND_HWDEP_IFACE_PCXHR, SND_HWDEP_IFACE_SB_RC, SND_HWDEP_IFACE_LAST = SND_HWDEP_IFACE_SB_RC }
enum	snd_hwdep_type_t { SND_HWDEP_TYPE_HW, SND_HWDEP_TYPE_SHM, SND_HWDEP_TYPE_INET }

Macros

Typedefs

Enumerations

Functions

Detailed Description

Macro Definition Documentation

Typedef Documentation

Enumeration Type Documentation

Function Documentation