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modem.conf Off-hook improve behavior

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Only restore the old value if it differs from the requested
value, because if it has changed restoring the old value
overrides the change.  Take for example, a voice modem with
a .conf that sets preserve off-hook.  Start playback (on-hook
to off-hook), start record (off-hook to off-hook), stop
playback (off-hook to restore on-hook), stop record (on-hook
to restore off-hook), Clearly you don't want to leave the
modem "on the phone" now that there isn't any playback or
recording active.

Signed-off-by: David Fries <david@fries.net>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
David Fries 2009-12-25 14:22:38 -06:00 • committed by Takashi Iwai
parent d3c6e2b097
commit 63acb87329
3 changed files with 24 additions and 1 deletions
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include/control.h
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@ -423,6 +423,7 @@ int snd_ctl_elem_value_malloc(snd_ctl_elem_value_t **ptr);
void snd_ctl_elem_value_free(snd_ctl_elem_value_t *obj);
void snd_ctl_elem_value_clear(snd_ctl_elem_value_t *obj);
void snd_ctl_elem_value_copy(snd_ctl_elem_value_t *dst, const snd_ctl_elem_value_t *src);
int snd_ctl_elem_value_compare(snd_ctl_elem_value_t *left, const snd_ctl_elem_value_t *right);
void snd_ctl_elem_value_get_id(const snd_ctl_elem_value_t *obj, snd_ctl_elem_id_t *ptr);
unsigned int snd_ctl_elem_value_get_numid(const snd_ctl_elem_value_t *obj);
snd_ctl_elem_iface_t snd_ctl_elem_value_get_interface(const snd_ctl_elem_value_t *obj);