ALSA project - the C library reference
 All Data Structures Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
Functions
hwdep.c File Reference

HwDep Interface (hardware dependent) More...

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_open_lconf (snd_hwdep_t **hwdep, const char *name, int mode, snd_config_t *lconf)
 Opens a new connection to the HwDep interface using local configuration.
int snd_hwdep_close (snd_hwdep_t *hwdep)
 close HwDep handle
const char * snd_hwdep_name (snd_hwdep_t *hwdep)
 get identifier of HwDep handle
snd_hwdep_type_t snd_hwdep_type (snd_hwdep_t *hwdep)
 get type of HwDep handle
int snd_hwdep_poll_descriptors_count (snd_hwdep_t *hwdep)
 get count of poll descriptors for 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
size_t snd_hwdep_info_sizeof ()
 get size of the snd_hwdep_info_t structure in bytes
int snd_hwdep_info_malloc (snd_hwdep_info_t **info)
 allocate a new snd_hwdep_info_t structure
void snd_hwdep_info_free (snd_hwdep_info_t *info)
 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
int snd_hwdep_info_get_card (const snd_hwdep_info_t *obj)
 get hwdep card number
unsigned int snd_hwdep_info_get_device (const snd_hwdep_info_t *info)
 get hwdep device 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
int snd_hwdep_info (snd_hwdep_t *hwdep, snd_hwdep_info_t *info)
 get information about HwDep handle
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
int snd_hwdep_dsp_status (snd_hwdep_t *hwdep, snd_hwdep_dsp_status_t *info)
 get the DSP status information
int snd_hwdep_dsp_load (snd_hwdep_t *hwdep, snd_hwdep_dsp_image_t *block)
 load the DSP block
size_t snd_hwdep_dsp_status_sizeof ()
 get size of the snd_hwdep_dsp_status_t structure in bytes
int snd_hwdep_dsp_status_malloc (snd_hwdep_dsp_status_t **info)
 allocate a new 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
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 *info)
 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 ()
 get size of the snd_hwdep_dsp_image_t structure in bytes
int snd_hwdep_dsp_image_malloc (snd_hwdep_dsp_image_t **info)
 allocate a new 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
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
size_t snd_hwdep_dsp_image_get_length (const snd_hwdep_dsp_image_t *obj)
 get the length 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
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_length (snd_hwdep_dsp_image_t *obj, size_t length)
 set the DSP block length
void snd_hwdep_dsp_image_set_image (snd_hwdep_dsp_image_t *obj, void *image)
 set the DSP block image pointer

Detailed Description

HwDep Interface (hardware dependent)

Author:
Jaroslav Kysela perex.nosp@m.@per.nosp@m.ex.cz
Date:
2000-2001

HwDep (hardware dependent) Interface is designed for individual hardware access. This interface does not cover any API specification.


Function Documentation

const char* snd_hwdep_name ( snd_hwdep_t hwdep)

get identifier of HwDep handle

Parameters:
hwdepa Hwdep handle
Returns:
ascii identifier of HwDep handle

Returns the ASCII identifier of given HwDep handle. It's the same identifier specified in snd_hwdep_open().

int snd_hwdep_open_lconf ( snd_hwdep_t **  hwdep,
const char *  name,
int  mode,
snd_config_t lconf 
)

Opens a new connection to the HwDep interface using local configuration.

Parameters:
hwdepReturned handle (NULL if not wanted)
nameASCII identifier of the HwDep handle
modeOpen mode
lconfThe local configuration tree
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_count ( snd_hwdep_t hwdep)

get count of poll descriptors for HwDep handle

Parameters:
hwdepHwDep handle
Returns:
count of poll descriptors
snd_hwdep_type_t snd_hwdep_type ( snd_hwdep_t hwdep)

get type of HwDep handle

Parameters:
hwdepa HwDep handle
Returns:
type of HwDep handle

Returns the type snd_hwdep_type_t of given HwDep handle.