SND_AC97_UPDATE_POWE(9) Control/Mixer API SND_AC97_UPDATE_POWE(9)NAME
snd_ac97_update_power - update the powerdown register
int snd_ac97_update_power(struct snd_ac97 * ac97, int reg, int powerup);
the codec instance
the rate register, e.g. AC97_PCM_FRONT_DAC_RATE
non-zero when power up the part
Update the AC97 powerdown register bits of the given part.
COPYRIGHT Kernel Hackers Manual 3.10 June 2014 SND_AC97_UPDATE_POWE(9)
Check Out this Related Man Page
How-To send or update registrations.(3) libeXosip2 How-To send or update registrations.(3)NAME
How-To send or update registrations. - eXosip2 offers a flexible API to help you to register one or several identities.
Initiate a registration
To start a registration, you need to build a default REGISTER request bby providing several mandatory headers
osip_message_t *reg = NULL;
id = eXosip_register_build_initial_register (identity, registrar, NULL,
if (id < 0)
osip_message_set_supported (reg, '100rel');
i = eXosip_register_send_register (id, reg);
The returned element of eXosip_register_build_initial_register is the registration identifier that you can use to update your registration.
In future events about this registration, you'll see that registration identifier when applicable.
Update a registration
You just need to reuse the registration identifier:
i = eXosip_register_build_register (id, 1800, ®);
if (i < 0)
eXosip_register_send_register (id, reg);
Note: The above code also shows that the stack is sometimes able to build and send a default SIP messages with only one API call
Closing the registration
A softphone should delete its registration on the SIP server when terminating. To do so, you have to send a REGISTER request with the
expires header set to value '0'.
The same code as for updating a registration is used with 0 instead of 1800 for the expiration delay.
Generated automatically by Doxygen for libeXosip2 from the source code.
Version 3.1.0 Sun Jun 24 2012 How-To send or update registrations.(3)
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