pcm_hooks.c File Reference

PCM Hook Interface. More...

Functions
int	snd_pcm_hooks_open (snd_pcm_t **pcmp, const char *name, snd_pcm_t *slave, int close_slave)
	Creates a new hooks PCM.
int	_snd_pcm_hooks_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 hooks PCM.
	SND_DLSYM_BUILD_VERSION (_snd_pcm_hooks_open, SND_PCM_DLSYM_VERSION)
snd_pcm_t *	snd_pcm_hook_get_pcm (snd_pcm_hook_t *hook)
	Get PCM handle for a PCM hook.
void *	snd_pcm_hook_get_private (snd_pcm_hook_t *hook)
	Get callback function private data for a PCM hook.
void	snd_pcm_hook_set_private (snd_pcm_hook_t *hook, void *private_data)
	Set callback function private data for a PCM hook.
int	snd_pcm_hook_add (snd_pcm_hook_t **hookp, snd_pcm_t *pcm, snd_pcm_hook_type_t type, snd_pcm_hook_func_t func, void *private_data)
	Add a PCM hook at end of hooks chain.
int	snd_pcm_hook_remove (snd_pcm_hook_t *hook)
	Remove a PCM hook.
int	_snd_pcm_hook_ctl_elems_install (snd_pcm_t *pcm, snd_config_t *conf)
	Install CTL settings using hardware associated with PCM handle.
	SND_DLSYM_BUILD_VERSION (_snd_pcm_hook_ctl_elems_install, SND_PCM_DLSYM_VERSION)

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Detailed Description

PCM Hook 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_hook_ctl_elems_install (  snd_pcm_t *  pcm, snd_config_t *  conf )

Install CTL settings using hardware associated with PCM handle. Parameters: pcm  PCM handle conf  Configuration node with CTL settings Returns: zero on success otherwise a negative error code

int _snd_pcm_hooks_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 hooks PCM. Parameters: pcmp  Returns created PCM handle name  Name of PCM root  Root configuration node conf  Configuration node with hooks PCM description stream  PCM Stream mode  PCM 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_hooks_open (  snd_pcm_t **  pcmp, const char *  name, snd_pcm_t *  slave, int  close_slave )

Creates a new hooks PCM. Parameters: pcmp  Returns created PCM handle name  Name of PCM slave  Slave PCM close_slave  If set, slave PCM handle is closed when hooks PCM is closed 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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