/builddir/build/BUILD/alsa-lib-1.0.14rc3/src/pcm/pcm_hw.c File Reference

PCM HW Plugin Interface. More...


Functions

int snd_pcm_hw_open_fd (snd_pcm_t **pcmp, const char *name, int fd, int mmap_emulation, int sync_ptr_ioctl)
 Creates a new hw PCM.
int snd_pcm_hw_open (snd_pcm_t **pcmp, const char *name, int card, int device, int subdevice, snd_pcm_stream_t stream, int mode, int mmap_emulation, int sync_ptr_ioctl)
 Creates a new hw PCM.
int _snd_pcm_hw_open (snd_pcm_t **pcmp, const char *name, snd_config_t *root, snd_config_t *conf, snd_pcm_stream_t stream, int mode)
 Creates a new hw PCM.


Detailed Description

PCM HW Plugin Interface.

Author:
Abramo Bagnara <abramo@alsa-project.org>

Jaroslav Kysela <perex@suse.cz>

Date:
2000-2001

Function Documentation

int _snd_pcm_hw_open ( snd_pcm_t **  pcmp,
const char *  name,
snd_config_t root,
snd_config_t conf,
snd_pcm_stream_t  stream,
int  mode 
)

Creates a new hw PCM.

Parameters:
pcmp Returns created PCM handle
name Name of PCM
root Root configuration node
conf Configuration node with hw PCM description
stream PCM Stream
mode PCM Mode
Warning:
Using of this function might be dangerous in the sense of compatibility reasons. The prototype might be freely changed in future.

int snd_pcm_hw_open ( snd_pcm_t **  pcmp,
const char *  name,
int  card,
int  device,
int  subdevice,
snd_pcm_stream_t  stream,
int  mode,
int  mmap_emulation,
int  sync_ptr_ioctl 
)

Creates a new hw PCM.

Parameters:
pcmp Returns created PCM handle
name Name of PCM
card Number of card
device Number of device
subdevice Number of subdevice
stream PCM Stream
mode PCM Mode
mmap_emulation Emulate mmap access using standard r/w access
sync_ptr_ioctl Use SYNC_PTR ioctl rather than mmap for control structures
Return values:
zero on success otherwise a negative error code
Warning:
Using of this function might be dangerous in the sense of compatibility reasons. The prototype might be freely changed in future.

int snd_pcm_hw_open_fd ( snd_pcm_t **  pcmp,
const char *  name,
int  fd,
int  mmap_emulation,
int  sync_ptr_ioctl 
)

Creates a new hw PCM.

Parameters:
pcmp Returns created PCM handle
name Name of PCM
fd File descriptor
mmap_emulation Boolean flag for mmap emulation mode
sync_ptr_ioctl Boolean flag for sync_ptr ioctl
Return values:
zero on success otherwise a negative error code
Warning:
Using of this function might be dangerous in the sense of compatibility reasons. The prototype might be freely changed in future.


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