Stream Information
[PCM Interface]

Defines
#define	snd_pcm_info_alloca(ptr)
	allocate an invalid snd_pcm_info_t using standard alloca
Functions
size_t	snd_pcm_info_sizeof (void)
	get size of snd_pcm_info_t
int	snd_pcm_info_malloc (snd_pcm_info_t **ptr)
	allocate an invalid snd_pcm_info_t using standard malloc
void	snd_pcm_info_free (snd_pcm_info_t *obj)
	frees a previously allocated snd_pcm_info_t
void	snd_pcm_info_copy (snd_pcm_info_t *dst, const snd_pcm_info_t *src)
	copy one snd_pcm_info_t to another
unsigned int	snd_pcm_info_get_device (const snd_pcm_info_t *obj)
	Get device from a PCM info container.
unsigned int	snd_pcm_info_get_subdevice (const snd_pcm_info_t *obj)
	Get subdevice from a PCM info container.
snd_pcm_stream_t	snd_pcm_info_get_stream (const snd_pcm_info_t *obj)
	Get stream (direction) from a PCM info container.
int	snd_pcm_info_get_card (const snd_pcm_info_t *obj)
	Get card from a PCM info container.
const char *	snd_pcm_info_get_id (const snd_pcm_info_t *obj)
	Get id from a PCM info container.
const char *	snd_pcm_info_get_name (const snd_pcm_info_t *obj)
	Get name from a PCM info container.
const char *	snd_pcm_info_get_subdevice_name (const snd_pcm_info_t *obj)
	Get subdevice name from a PCM info container.
snd_pcm_class_t	snd_pcm_info_get_class (const snd_pcm_info_t *obj)
	Get class from a PCM info container.
snd_pcm_subclass_t	snd_pcm_info_get_subclass (const snd_pcm_info_t *obj)
	Get subclass from a PCM info container.
unsigned int	snd_pcm_info_get_subdevices_count (const snd_pcm_info_t *obj)
	Get subdevices count from a PCM info container.
unsigned int	snd_pcm_info_get_subdevices_avail (const snd_pcm_info_t *obj)
	Get available subdevices count from a PCM info container.
snd_pcm_sync_id_t	snd_pcm_info_get_sync (const snd_pcm_info_t *obj)
	Get hardware synchronization ID from a PCM info container.
void	snd_pcm_info_set_device (snd_pcm_info_t *obj, unsigned int val)
	Set wanted device inside a PCM info container (see snd_ctl_pcm_info).
void	snd_pcm_info_set_subdevice (snd_pcm_info_t *obj, unsigned int val)
	Set wanted subdevice inside a PCM info container (see snd_ctl_pcm_info).
void	snd_pcm_info_set_stream (snd_pcm_info_t *obj, snd_pcm_stream_t val)
	Set wanted stream inside a PCM info container (see snd_ctl_pcm_info).

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Detailed Description

See the PCM (digital audio) interface page for more details.

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Define Documentation

#define snd_pcm_info_alloca (  ptr   )

allocate an invalid snd_pcm_info_t using standard alloca Parameters: ptr  returned pointer

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Function Documentation

void snd_pcm_info_copy (  snd_pcm_info_t *  dst, const snd_pcm_info_t *  src )

copy one snd_pcm_info_t to another Parameters: dst  pointer to destination src  pointer to source

void snd_pcm_info_free (  snd_pcm_info_t *  obj  )

frees a previously allocated snd_pcm_info_t Parameters: obj  pointer to object to free

int snd_pcm_info_get_card (  const snd_pcm_info_t *  obj  )

Get card from a PCM info container. Parameters: obj  PCM info container Returns: card number otherwise a negative error code if not associable to a card

snd_pcm_class_t snd_pcm_info_get_class (  const snd_pcm_info_t *  obj  )

Get class from a PCM info container. Parameters: obj  PCM info container Returns: class of PCM

unsigned int snd_pcm_info_get_device (  const snd_pcm_info_t *  obj  )

Get device from a PCM info container. Parameters: obj  PCM info container Returns: device number

const char* snd_pcm_info_get_id (  const snd_pcm_info_t *  obj  )

Get id from a PCM info container. Parameters: obj  PCM info container Returns: short id of PCM

const char* snd_pcm_info_get_name (  const snd_pcm_info_t *  obj  )

Get name from a PCM info container. Parameters: obj  PCM info container Returns: name of PCM

snd_pcm_stream_t snd_pcm_info_get_stream (  const snd_pcm_info_t *  obj  )

Get stream (direction) from a PCM info container. Parameters: obj  PCM info container Returns: stream

snd_pcm_subclass_t snd_pcm_info_get_subclass (  const snd_pcm_info_t *  obj  )

Get subclass from a PCM info container. Parameters: obj  PCM info container Returns: subclass of PCM

unsigned int snd_pcm_info_get_subdevice (  const snd_pcm_info_t *  obj  )

Get subdevice from a PCM info container. Parameters: obj  PCM info container Returns: subdevice number

const char* snd_pcm_info_get_subdevice_name (  const snd_pcm_info_t *  obj  )

Get subdevice name from a PCM info container. Parameters: obj  PCM info container Returns: name of used PCM subdevice

unsigned int snd_pcm_info_get_subdevices_avail (  const snd_pcm_info_t *  obj  )

Get available subdevices count from a PCM info container. Parameters: obj  PCM info container Returns: available subdevices count of PCM

unsigned int snd_pcm_info_get_subdevices_count (  const snd_pcm_info_t *  obj  )

Get subdevices count from a PCM info container. Parameters: obj  PCM info container Returns: subdevices total count of PCM

snd_pcm_sync_id_t snd_pcm_info_get_sync (  const snd_pcm_info_t *  obj  )

Get hardware synchronization ID from a PCM info container. Parameters: obj  PCM info container Returns: hardware synchronization ID

int snd_pcm_info_malloc (  snd_pcm_info_t **  ptr  )

allocate an invalid snd_pcm_info_t using standard malloc Parameters: ptr  returned pointer Returns: 0 on success otherwise negative error code

void snd_pcm_info_set_device (  snd_pcm_info_t *  obj, unsigned int  val )

Set wanted device inside a PCM info container (see snd_ctl_pcm_info). Parameters: obj  PCM info container val  Device number

void snd_pcm_info_set_stream (  snd_pcm_info_t *  obj, snd_pcm_stream_t  val )

Set wanted stream inside a PCM info container (see snd_ctl_pcm_info). Parameters: obj  PCM info container val  Stream

void snd_pcm_info_set_subdevice (  snd_pcm_info_t *  obj, unsigned int  val )

Set wanted subdevice inside a PCM info container (see snd_ctl_pcm_info). Parameters: obj  PCM info container val  Subdevice number

size_t snd_pcm_info_sizeof (  void   )

get size of snd_pcm_info_t Returns: size in bytes

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