pcm_route.c File Reference

PCM Route & Volume Plugin Interface. More...

Functions
int	snd_pcm_route_open (snd_pcm_t **pcmp, const char *name, snd_pcm_format_t sformat, int schannels, snd_pcm_route_ttable_entry_t *ttable, unsigned int tt_ssize, unsigned int tt_cused, unsigned int tt_sused, snd_pcm_t *slave, int close_slave)
	Creates a new Route & Volume PCM.
int	snd_pcm_route_determine_ttable (snd_config_t *tt, unsigned int *tt_csize, unsigned int *tt_ssize)
	Determine route matrix sizes.
int	snd_pcm_route_load_ttable (snd_config_t *tt, snd_pcm_route_ttable_entry_t *ttable, unsigned int tt_csize, unsigned int tt_ssize, unsigned int *tt_cused, unsigned int *tt_sused, int schannels)
	Load route matrix.
int	_snd_pcm_route_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 Route & Volume PCM.
	SND_DLSYM_BUILD_VERSION (_snd_pcm_route_open, SND_PCM_DLSYM_VERSION)

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Detailed Description

PCM Route & Volume Plugin Interface.

Author:

Abramo Bagnara <abramo@alsa-project.org>

Date:

2000-2001

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Function Documentation

int _snd_pcm_route_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 Route & Volume PCM. Parameters: pcmp  Returns created PCM handle name  Name of PCM root  Root configuration node conf  Configuration node with Route & Volume PCM description stream  Stream type mode  Stream mode 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_route_determine_ttable (  snd_config_t *  tt, unsigned int *  tt_csize, unsigned int *  tt_ssize )

Determine route matrix sizes. Parameters: tt  Configuration root describing route matrix tt_csize  Returned client size in elements tt_ssize  Returned slave size in elements Return values: zero  on success otherwise a negative error code

int snd_pcm_route_load_ttable (  snd_config_t *  tt, snd_pcm_route_ttable_entry_t *  ttable, unsigned int  tt_csize, unsigned int  tt_ssize, unsigned int *  tt_cused, unsigned int *  tt_sused, int  schannels )

Load route matrix. Parameters: tt  Configuration root describing route matrix ttable  Returned route matrix tt_csize  Client size in elements tt_ssize  Slave size in elements tt_cused  Used client elements tt_sused  Used slave elements schannels  Slave channels Return values: zero  on success otherwise a negative error code

int snd_pcm_route_open (  snd_pcm_t **  pcmp, const char *  name, snd_pcm_format_t  sformat, int  schannels, snd_pcm_route_ttable_entry_t *  ttable, unsigned int  tt_ssize, unsigned int  tt_cused, unsigned int  tt_sused, snd_pcm_t *  slave, int  close_slave )

Creates a new Route & Volume PCM. Parameters: pcmp  Returns created PCM handle name  Name of PCM sformat  Slave format schannels  Slave channels ttable  Attenuation table tt_ssize  Attenuation table - slave size tt_cused  Attenuation table - client used count tt_sused  Attenuation table - slave used count slave  Slave PCM handle close_slave  When set, the slave PCM handle is closed with copy PCM 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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