# /builddir/build/BUILD/alsa-lib-1.1.0/include/hwdep.h File Reference

Application interface library for the ALSA driver. More...

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## Defines

#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

## 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_HDA, SND_HWDEP_IFACE_USB_STREAM, SND_HWDEP_IFACE_FW_DICE, SND_HWDEP_IFACE_FW_FIREWORKS,
SND_HWDEP_IFACE_FW_BEBOB, SND_HWDEP_IFACE_FW_OXFW, SND_HWDEP_IFACE_FW_DIGI00X, SND_HWDEP_IFACE_FW_TASCAM,
SND_HWDEP_IFACE_LAST = SND_HWDEP_IFACE_FW_TASCAM
}

enum | snd_hwdep_type_t { SND_HWDEP_TYPE_HW, SND_HWDEP_TYPE_SHM, SND_HWDEP_TYPE_INET }

## 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_count (snd_hwdep_t *hwdep)
| get count of poll descriptors for HwDep handle
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

Application interface library for the ALSA driver.

Author:
  Jaroslav Kysela <perex@perex.cz>
  Abramo Bagnara <abramo@alsa-project.org>
  Takashi Iwai <tiwai@suse.de>

Date:
  1998-2001

Application interface library for the ALSA driver

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