pcm_dmix.c File Reference

PCM Direct Stream Mixing (dmix) Plugin Interface. More...

Defines
#define	STATE_RUN_PENDING   1024
#define	dmix_down_sem(dmix)   snd_pcm_direct_semaphore_down(dmix, DIRECT_IPC_SEM_CLIENT)
#define	dmix_up_sem(dmix)   snd_pcm_direct_semaphore_up(dmix, DIRECT_IPC_SEM_CLIENT)
Functions
int	snd_pcm_dmix_open (snd_pcm_t **pcmp, const char *name, key_t ipc_sem, key_t ipc_mem_direct, key_t ipc_mem_plug, int share_ipc_key, mode_t ipc_perm, struct slave_params *params, snd_config_t *bindings, int slowptr, snd_config_t *root, snd_config_t *sconf, snd_pcm_stream_t stream, int mode)
	Creates a new dmix PCM.
int	_snd_pcm_dmix_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 dmix PCM.
	SND_DLSYM_BUILD_VERSION (_snd_pcm_dmix_open, SND_PCM_DLSYM_VERSION)

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Detailed Description

PCM Direct Stream Mixing (dmix) Plugin Interface.

Author:

Jaroslav Kysela <perex@suse.cz>

Date:

2003

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Function Documentation

int _snd_pcm_dmix_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 dmix PCM. Parameters: pcmp  Returns created PCM handle name  Name of PCM root  Root configuration node conf  Configuration node with dmix PCM description stream  PCM Stream mode  PCM 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_dmix_open (  snd_pcm_t **  pcmp, const char *  name, key_t  ipc_sem, key_t  ipc_mem_direct, key_t  ipc_mem_plug, int  share_ipc_key, mode_t  ipc_perm, struct slave_params *  params, snd_config_t *  bindings, int  slowptr, snd_config_t *  root, snd_config_t *  sconf, snd_pcm_stream_t  stream, int  mode )

Creates a new dmix PCM. Parameters: pcmp  Returns created PCM handle name  Name of PCM ipc_key  IPC key for semaphore and shared memory ipc_perm  IPC permissions for semaphore and shared memory params  Parameters for slave bindings  Channel bindings slowptr  Slow but more precise pointer updates root  Configuration root sconf  Slave configuration stream  PCM Direction (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.

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