commit d4f2d069126d564b2ef504e0cb59369d8e1e9f32
author ty.lee <ty.lee@lge.com> Mon Sep 03 17:02:44 2012 +0900
committer Iliyan Malchev <malchev@google.com> Thu Sep 13 21:13:43 2012 -0700
tree c5ed0b64914fb3b5c412cb2d018d8d26fa5df493
parent e42406e02e32dbb398a2fa0c452e52526b763c8d

audio: fix problem of routing device 0 after A2DP play

This patch avoids abnormal operation in AudioStreamOutALSA::write().
When BT device is turned On/Off, if routing device is 0, then pcm open
will be failed.

- A variable "mDevices" is set to "0" when device is switched to BT A2DP
from speaker during playing music.
- If variable "mDevices" is "0", when PCM data is writing to buffer
in A2DP stream, then a routing device is set "no device".
- And when device is switched to ALSA stream, and PCM open will be failed.

This causes media crash as killing ALSA.

Change-Id: Id416bed3f59bfbe857b2a9fd504f3f18746fb4cd

alsa_sound/AudioStreamOutALSA.cpp

diff --git a/alsa_sound/AudioStreamOutALSA.cpp b/alsa_sound/AudioStreamOutALSA.cpp
index eb0949e..be6951e 100644
--- a/alsa_sound/AudioStreamOutALSA.cpp
+++ b/alsa_sound/AudioStreamOutALSA.cpp
@@ -165,8 +165,9 @@
             mHandle->module->route(mHandle, mDevices , mParent->mode());
 #endif
         } else {
-
-              mHandle->module->route(mHandle, mDevices , mParent->mode());
+            if (!mDevices)
+               mDevices = mParent->mCurDevice;
+            mHandle->module->route(mHandle, mDevices , mParent->mode());
         }
         if (!strcmp(mHandle->useCase, SND_USE_CASE_VERB_HIFI) ||
             !strcmp(mHandle->useCase, SND_USE_CASE_VERB_HIFI_LOWLATENCY_MUSIC) ||