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pcm_hw.c File Reference

PCM HW Plugin Interface. More...

Enumerations

enum  { CHMAP_CTL_QUERY, CHMAP_CTL_GET, CHMAP_CTL_SET }

Functions

snd_pcm_chmap_query_t ** snd_pcm_query_chmaps_from_hw (int card, int dev, int subdev, snd_pcm_stream_t stream)
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 abram.nosp@m.o@al.nosp@m.sa-pr.nosp@m.ojec.nosp@m.t.org
Jaroslav Kysela perex.nosp@m.@per.nosp@m.ex.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:
pcmpReturns created PCM handle
nameName of PCM
rootRoot configuration node
confConfiguration node with hw PCM description
streamPCM Stream
modePCM 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:
pcmpReturns created PCM handle
nameName of PCM
cardNumber of card
deviceNumber of device
subdeviceNumber of subdevice
streamPCM Stream
modePCM Mode
mmap_emulationObsoleted parameter
sync_ptr_ioctlUse SYNC_PTR ioctl rather than mmap for control structures
Return values:
zeroon 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:
pcmpReturns created PCM handle
nameName of PCM
fdFile descriptor
mmap_emulationObsoleted parameter
sync_ptr_ioctlBoolean flag for sync_ptr ioctl
Return values:
zeroon 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.