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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. More...
 
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. More...
 
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. More...
 

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.

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