fix problem in AudioEffect JNI setup.

There is a problem in AudioEffect and Visualizer native_setup() methods
that causes a crash in the application after the mediaserver process
has crashed and restarted.
The problem is that the native AudioEffect/Visualizer constructor is
called while the JNI is in critical state after calling
GetPrimitiveArrayCritical(). As the mediaserver process just restarted, the
first call to AudioSystem will cause the binder IAudioflinger interface to
be reteived and a callback send to AudioSystem JNI to clear the mediaserver
error state. This will call env->FindClass() and crash due to the JNI being
in critical state.

Also fixed a similar problem in AudioTrack JNI

Change-Id: I4a9026a3e26c7f78d9b4b4bec1aac90fbee2ab62

1 files changed, 19 insertions, 13 deletions

diff --git a/core/jni/android_media_AudioTrack.cpp b/core/jni/android_media_AudioTrack.cpp
index 9d215b7..8409adc 100644
--- a/core/jni/android_media_AudioTrack.cpp
+++ b/core/jni/android_media_AudioTrack.cpp
@@ -252,21 +252,23 @@ android_media_AudioTrack_native_setup(JNIEnv *env, jobject thiz, jobject weak_th
     lpJniStorage->mCallbackData.audioTrack_ref = env->NewGlobalRef(weak_this);
     
     lpJniStorage->mStreamType = atStreamType;
-    
-    jint* nSession = NULL;
-    if (jSession) {
-        nSession = (jint *) env->GetPrimitiveArrayCritical(jSession, NULL);
-        if (nSession == NULL) {
-            LOGE("Error creating AudioTrack: Error retrieving session id pointer");
-            delete lpJniStorage;
-            return AUDIOTRACK_ERROR;
-        }
-    } else {
+
+    if (jSession == NULL) {
         LOGE("Error creating AudioTrack: invalid session ID pointer");
         delete lpJniStorage;
         return AUDIOTRACK_ERROR;
     }
 
+    jint* nSession = (jint *) env->GetPrimitiveArrayCritical(jSession, NULL);
+    if (nSession == NULL) {
+        LOGE("Error creating AudioTrack: Error retrieving session id pointer");
+        delete lpJniStorage;
+        return AUDIOTRACK_ERROR;
+    }
+    int sessionId = nSession[0];
+    env->ReleasePrimitiveArrayCritical(jSession, nSession, 0);
+    nSession = NULL;
+
     // create the native AudioTrack object
     AudioTrack* lpTrack = new AudioTrack();
     if (lpTrack == NULL) {
@@ -288,7 +290,7 @@ android_media_AudioTrack_native_setup(JNIEnv *env, jobject thiz, jobject weak_th
             0,// notificationFrames == 0 since not using EVENT_MORE_DATA to feed the AudioTrack
             0,// shared mem
             true,// thread can call Java
-            nSession[0]);// audio session ID
+            sessionId);// audio session ID
             
     } else if (memoryMode == javaAudioTrackFields.MODE_STATIC) {
         // AudioTrack is using shared memory
@@ -309,7 +311,7 @@ android_media_AudioTrack_native_setup(JNIEnv *env, jobject thiz, jobject weak_th
             0,// notificationFrames == 0 since not using EVENT_MORE_DATA to feed the AudioTrack 
             lpJniStorage->mMemBase,// shared mem
             true,// thread can call Java
-            nSession[0]);// audio session ID
+            sessionId);// audio session ID
     }
 
     if (lpTrack->initCheck() != NO_ERROR) {
@@ -317,9 +319,13 @@ android_media_AudioTrack_native_setup(JNIEnv *env, jobject thiz, jobject weak_th
         goto native_init_failure;
     }
 
+    nSession = (jint *) env->GetPrimitiveArrayCritical(jSession, NULL);
+    if (nSession == NULL) {
+        LOGE("Error creating AudioTrack: Error retrieving session id pointer");
+        goto native_init_failure;
+    }
     // read the audio session ID back from AudioTrack in case we create a new session
     nSession[0] = lpTrack->getSessionId();
-
     env->ReleasePrimitiveArrayCritical(jSession, nSession, 0);
     nSession = NULL;