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Added power management functions and defines.

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This commit is contained in:
Jaroslav Kysela 2001-09-26 13:57:04 +00:00
parent 23d8f9a0b0
commit 3c59c6b11d
19 changed files with 195 additions and 0 deletions
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27
src/control/control.c
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@ -363,6 +363,33 @@ int snd_ctl_rawmidi_prefer_subdevice(snd_ctl_t *ctl, int subdev)
return ctl->ops->rawmidi_prefer_subdevice(ctl, subdev);
}
/**
* \brief Set Power State to given SND_CTL_POWER_* value and do the power management
* \param ctl CTL handle
* \param state Desired Power State
* \return 0 on success otherwise a negative error code
*/
int snd_ctl_set_power_state(snd_ctl_t *ctl, unsigned int state)
{
assert(ctl);
if (ctl->ops->set_power_state)
return ctl->ops->set_power_state(ctl, state);
return -ENXIO;
}
/**
* \brief Get actual Power State
* \param ctl CTL handle
* \param state Destination value
* \return 0 on success otherwise a negative error code
*/
int snd_ctl_get_power_state(snd_ctl_t *ctl, unsigned int *state)
{
assert(ctl);
if (ctl->ops->get_power_state)
return ctl->ops->get_power_state(ctl, state);
return -ENXIO;
}
/**
* \brief Read an event