5 files changed, 43 insertions, 2 deletions

diff --git a/include/media/AudioSystem.h b/include/media/AudioSystem.h
index e0d7898..6a15f6e 100644
--- a/include/media/AudioSystem.h
+++ b/include/media/AudioSystem.h
@@ -185,6 +185,10 @@ public:
     static status_t unregisterEffect(int id);
     static status_t setEffectEnabled(int id, bool enabled);
 
+    // clear stream to output mapping cache (gStreamOutputMap)
+    // and output configuration cache (gOutputs)
+    static void clearAudioConfigCache();
+
     static const sp<IAudioPolicyService>& get_audio_policy_service();
 
     // ----------------------------------------------------------------------------
@@ -236,7 +240,8 @@ private:
 
     // mapping between stream types and outputs
     static DefaultKeyedVector<int, audio_io_handle_t> gStreamOutputMap;
-    // list of output descritor containing cached parameters (sampling rate, framecount, channel count...)
+    // list of output descriptors containing cached parameters
+    // (sampling rate, framecount, channel count...)
     static DefaultKeyedVector<audio_io_handle_t, OutputDescriptor *> gOutputs;
 };
 
diff --git a/media/libmedia/AudioSystem.cpp b/media/libmedia/AudioSystem.cpp
index bb91fa9..853a5f6 100644
--- a/media/libmedia/AudioSystem.cpp
+++ b/media/libmedia/AudioSystem.cpp
@@ -727,6 +727,14 @@ status_t AudioSystem::isStreamActive(int stream, bool* state, uint32_t inPastMs)
 }
 
 
+void AudioSystem::clearAudioConfigCache()
+{
+    Mutex::Autolock _l(gLock);
+    LOGV("clearAudioConfigCache()");
+    gStreamOutputMap.clear();
+    gOutputs.clear();
+}
+
 // ---------------------------------------------------------------------------
 
 void AudioSystem::AudioPolicyServiceClient::binderDied(const wp<IBinder>& who) {
diff --git a/media/libmedia/AudioTrack.cpp b/media/libmedia/AudioTrack.cpp
index cecedb5..3b6c64d 100644
--- a/media/libmedia/AudioTrack.cpp
+++ b/media/libmedia/AudioTrack.cpp
@@ -1164,6 +1164,10 @@ status_t AudioTrack::restoreTrack_l(audio_track_cblk_t*& cblk, bool fromStart)
         cblk->cv.broadcast();
         cblk->lock.unlock();
 
+        // refresh the audio configuration cache in this process to make sure we get new
+        // output parameters in getOutput_l() and createTrack_l()
+        AudioSystem::clearAudioConfigCache();
+
         // if the new IAudioTrack is created, createTrack_l() will modify the
         // following member variables: mAudioTrack, mCblkMemory and mCblk.
         // It will also delete the strong references on previous IAudioTrack and IMemory
diff --git a/services/audioflinger/AudioFlinger.cpp b/services/audioflinger/AudioFlinger.cpp
index 744fa50..2260091 100644
--- a/services/audioflinger/AudioFlinger.cpp
+++ b/services/audioflinger/AudioFlinger.cpp
@@ -1362,6 +1362,7 @@ AudioFlinger::PlaybackThread::PlaybackThread(const sp<AudioFlinger>& audioFlinge
     for (int stream = 0; stream < AUDIO_STREAM_CNT; stream++) {
         mStreamTypes[stream].volume = mAudioFlinger->streamVolumeInternal(stream);
         mStreamTypes[stream].mute = mAudioFlinger->streamMute(stream);
+        mStreamTypes[stream].valid = true;
     }
 }
 
@@ -1530,6 +1531,14 @@ sp<AudioFlinger::PlaybackThread::Track>  AudioFlinger::PlaybackThread::createTra
             chain->setStrategy(AudioSystem::getStrategyForStream((audio_stream_type_t)track->type()));
             chain->incTrackCnt();
         }
+
+        // invalidate track immediately if the stream type was moved to another thread since
+        // createTrack() was called by the client process.
+        if (!mStreamTypes[streamType].valid) {
+            LOGW("createTrack_l() on thread %p: invalidating track on stream %d",
+                 this, streamType);
+            android_atomic_or(CBLK_INVALID_ON, &track->mCblk->flags);
+        }
     }
     lStatus = NO_ERROR;
 
@@ -2219,6 +2228,14 @@ void AudioFlinger::MixerThread::invalidateTracks(int streamType)
     }
 }
 
+void AudioFlinger::PlaybackThread::setStreamValid(int streamType, bool valid)
+{
+    LOGV ("PlaybackThread::setStreamValid() thread %p, streamType %d, valid %d",
+            this,  streamType, valid);
+    Mutex::Autolock _l(mLock);
+
+    mStreamTypes[streamType].valid = valid;
+}
 
 // getTrackName_l() must be called with ThreadBase::mLock held
 int AudioFlinger::MixerThread::getTrackName_l()
@@ -5074,11 +5091,14 @@ status_t AudioFlinger::setStreamOutput(uint32_t stream, int output)
     LOGV("setStreamOutput() stream %d to output %d", stream, output);
     audioConfigChanged_l(AudioSystem::STREAM_CONFIG_CHANGED, output, &stream);
 
+    dstThread->setStreamValid(stream, true);
+
     for (size_t i = 0; i < mPlaybackThreads.size(); i++) {
         PlaybackThread *thread = mPlaybackThreads.valueAt(i).get();
         if (thread != dstThread &&
             thread->type() != ThreadBase::DIRECT) {
             MixerThread *srcThread = (MixerThread *)thread;
+            srcThread->setStreamValid(stream, false);
             srcThread->invalidateTracks(stream);
         }
     }
diff --git a/services/audioflinger/AudioFlinger.h b/services/audioflinger/AudioFlinger.h
index 1141f6c..c64fd4f 100644
--- a/services/audioflinger/AudioFlinger.h
+++ b/services/audioflinger/AudioFlinger.h
@@ -751,14 +751,18 @@ private:
                     virtual uint32_t hasAudioSession(int sessionId);
                     virtual uint32_t getStrategyForSession_l(int sessionId);
 
+                            void setStreamValid(int streamType, bool valid);
+
         struct  stream_type_t {
             stream_type_t()
                 :   volume(1.0f),
-                    mute(false)
+                    mute(false),
+                    valid(true)
             {
             }
             float       volume;
             bool        mute;
+            bool        valid;
         };
 
     protected: