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 ATTRIBUTE_UNUSED, snd_config_t *conf, snd_pcm_stream_t stream, int mode)
	Creates a new hw PCM.
	SND_DLSYM_BUILD_VERSION (_snd_pcm_hw_open, SND_PCM_DLSYM_VERSION)

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Detailed Description

PCM HW Plugin Interface.

Author:

Abramo Bagnara <abramo@alsa-project.org>

Jaroslav Kysela <perex@suse.cz>

Date:

2000-2001

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Function Documentation

int _snd_pcm_hw_open (  snd_pcm_t **  pcmp, const char *  name, snd_config_t *root  ATTRIBUTE_UNUSED, 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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