commit f60746b7c681322bf1906c637a6bf869956caec2
author Cheng-Yi Chiang <cychiang@chromium.org> Wed Mar 26 09:38:02 2014
committer chrome-internal-fetch <chrome-internal-fetch@google.com> Wed Mar 26 16:34:29 2014
tree cf3380eb5568547683b58cd17400d695a8a4b911
parent 04be559cb97ebe9a8c1e1e9edeb2d898e4b852a8

system_api: Add api to get number of input/output audio streams

Add GetNumberOfActiveInputStreams and GetNumberOfActiveOutputStreams
so other services can get number of active input output streams from
cras.

CQ-DEPEND=CL:191365
BUG=chrome-os-partner:336459
TEST=1. $ watch dbus-send --system --type=method_call --print-reply
  --dest=org.chromium.cras /org/chromium/cras
  org.chromium.cras.Control.GetNumberOfActiveInputStreams
     2. Click "search by voice" icon and check value in 1. is changed
  from 0 to 1.
     3. $ dbus-send --system  --type=method_call --print-reply
  --dest=org.chromium.cras /org/chromium/cras
  org.chromium.cras.Control.GetNumberOfActiveInputStreams
  The value should be 0.

Change-Id: Ib41272771d82c4ceb6e8871e559986a1bc2cfe76
Reviewed-on: https://chromium-review.googlesource.com/191619
Reviewed-by: Chih-Chung Chang <chihchung@chromium.org>
Reviewed-by: Dylan Reid <dgreid@chromium.org>
Commit-Queue: Cheng-Yi Chiang <cychiang@chromium.org>
Tested-by: Cheng-Yi Chiang <cychiang@chromium.org>