diff options
| author | Shaun Ruffell <sruffell@digium.com> | 2010-09-24 22:44:37 +0000 |
|---|---|---|
| committer | Shaun Ruffell <sruffell@digium.com> | 2010-09-24 22:44:37 +0000 |
| commit | 28ff1b763c119bcbd7fe41566f28e8e6b687cf0b (patch) | |
| tree | de961abc3d03574e4bb96acb3bde92461e9bf51a /include | |
| parent | 39e7e3fe91e5090c76576febfb88667c82121fe1 (diff) | |
dahdi: Allow core DAHDI software timing to work when DAHDI_CHUNKSIZE > 8.
When no hardware spans are configured DAHDI will use a kernel timer in order
provide timing for conferences. This is what dahdi_dummy historically was used
for. When kernel timers are used to provide timing DAHDI can both potentially
slow the rate at which time timer runs and also needs to account for how many
milliseconds of audio are processed for each 'tick' of process_masterspan.
The result is that if you are only using DAHDI for app_meetme, you can change
DAHDI_CHUNKSIZE to 40 (5ms) or 80 (10ms) bytes to reduce overhead since user
space is dealing with chunks of 20ms by default anyway.
NOTE: If you set this, you may still need to comment out the board drivers in
drivers/dahdi/Kbuild since they all do not support operating with a
DAHDI_CHUNKSIZE != 8 currently.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Acked-by: Kinsey Moore <kmoore@digium.com>
Acked-by: Russ Meyerriecks <rmeyerriecks@digium.com>
Acked-by: Tzafrir Cohen <tzafrir.cohen@xorcom.com>
Review: https://reviewboard.asterisk.org/r/940/
git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@9407 a0bf4364-ded3-4de4-8d8a-66a801d63aff
Diffstat (limited to 'include')
| -rw-r--r-- | include/dahdi/kernel.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/dahdi/kernel.h b/include/dahdi/kernel.h index 7a12227..7e4e254 100644 --- a/include/dahdi/kernel.h +++ b/include/dahdi/kernel.h @@ -100,6 +100,8 @@ #define DAHDI_MAX_CHUNKSIZE DAHDI_CHUNKSIZE #define DAHDI_CB_SIZE 2 +#define DAHDI_MSECS_PER_CHUNK (DAHDI_CHUNKSIZE/8) + #define RING_DEBOUNCE_TIME 2000 /*!< 2000 ms ring debounce time */ typedef struct |