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dahdi: Provide notification when preechocan buffer is created and destroyed.

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Not quite ideal, but this seems to be the most straightforward way to
know when someone is trying to monitor the preec stream on a channel.
This callback allows the board driver providing the span an opportunity
to setup the hardware preecho monitoring as needed.

Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Acked-by: Tzafrir Cohen <tzafrir.cohen@xorcom.com>

git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@9942 a0bf4364-ded3-4de4-8d8a-66a801d63aff
This commit is contained in:
Shaun Ruffell
2011-06-02 20:01:44 +00:00
parent dd33d6c357
commit 93a7adfb9f
2 changed files with 141 additions and 33 deletions
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6
include/dahdi/kernel.h
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@@ -864,6 +864,12 @@ struct dahdi_span_ops {
int (*audio_notify)(struct dahdi_chan *chan, int yes);
#endif
/*! Opt: Enable preechocan stream from inline HW echocanceler. */
int (*enable_hw_preechocan)(struct dahdi_chan *chan);
/*! Opt: Disable preechocan stream from inline HW echocanceler. */
void (*disable_hw_preechocan)(struct dahdi_chan *chan);
/*! Opt: Dacs the contents of chan2 into chan1 if possible */
int (*dacs)(struct dahdi_chan *chan1, struct dahdi_chan *chan2);