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pcm_softvol.c File Reference

PCM Soft Volume Plugin Interface. More...

Functions

int snd_pcm_softvol_open (snd_pcm_t **pcmp, const char *name, snd_pcm_format_t sformat, int ctl_card, snd_ctl_elem_id_t *ctl_id, int cchannels, double min_dB, double max_dB, int resolution, snd_pcm_t *slave, int close_slave)
 Creates a new SoftVolume PCM.
int snd_pcm_parse_control_id (snd_config_t *conf, snd_ctl_elem_id_t *ctl_id, int *cardp, int *cchannelsp, int *hwctlp)
 Parse control element id from the config.
int _snd_pcm_softvol_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 Soft Volume PCM.

Detailed Description

PCM Soft Volume Plugin Interface.

Author:
Takashi Iwai tiwai.nosp@m.@sus.nosp@m.e.de
Date:
2004

Function Documentation

int _snd_pcm_softvol_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 Soft Volume PCM.

Parameters:
pcmpReturns created PCM handle
nameName of PCM
rootRoot configuration node
confConfiguration node with Soft Volume PCM description
streamStream type
modeStream mode
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_softvol_open ( snd_pcm_t **  pcmp,
const char *  name,
snd_pcm_format_t  sformat,
int  ctl_card,
snd_ctl_elem_id_t ctl_id,
int  cchannels,
double  min_dB,
double  max_dB,
int  resolution,
snd_pcm_t slave,
int  close_slave 
)

Creates a new SoftVolume PCM.

Parameters:
pcmpReturns created PCM handle
nameName of PCM
sformatSlave format
ctl_cardcard index of the control
ctl_idThe control element
cchannelsPCM channels
min_dBminimal dB value
max_dBmaximal dB value
resolutionresolution of control
slaveSlave PCM handle
close_slaveWhen set, the slave PCM handle is closed with copy PCM
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.