Fix some metadata retriever issues:
1. mRetriever was initialized twice: one in the constructor and the other in the setDataSource
2. cached the mode so that setMode can still be called before setDataSource.
   mRetriever won't be initialized until data source is set; thus we have to do this
diff --git a/media/libmediaplayerservice/MetadataRetrieverClient.cpp b/media/libmediaplayerservice/MetadataRetrieverClient.cpp
index b34421d..ddd4e24 100644
--- a/media/libmediaplayerservice/MetadataRetrieverClient.cpp
+++ b/media/libmediaplayerservice/MetadataRetrieverClient.cpp
@@ -51,15 +51,8 @@
     mAlbumArtDealer = NULL;
     mThumbnail = NULL;
     mAlbumArt = NULL;
-
-#ifndef NO_OPENCORE
-    mRetriever = new PVMetadataRetriever();
-#else
     mRetriever = NULL;
-#endif
-    if (mRetriever == NULL) {
-        LOGE("failed to initialize the retriever");
-    }
+    mMode = METADATA_MODE_FRAME_CAPTURE_AND_METADATA_RETRIEVAL;
 }
 
 MetadataRetrieverClient::~MetadataRetrieverClient()
@@ -74,7 +67,7 @@
     char buffer[SIZE];
     String8 result;
     result.append(" MetadataRetrieverClient\n");
-    snprintf(buffer, 255, "  pid(%d)\n", mPid);
+    snprintf(buffer, 255, "  pid(%d) mode(%d)\n", mPid, mMode);
     result.append(buffer);
     write(fd, result.string(), result.size());
     write(fd, "\n", 1);
@@ -90,6 +83,7 @@
     mAlbumArtDealer.clear();
     mThumbnail.clear();
     mAlbumArt.clear();
+    mMode = METADATA_MODE_FRAME_CAPTURE_AND_METADATA_RETRIEVAL;
     IPCThreadState::self()->flushCommands();
 }
 
@@ -134,7 +128,10 @@
     LOGV("player type = %d", playerType);
     sp<MediaMetadataRetrieverBase> p = createRetriever(playerType);
     if (p == NULL) return NO_INIT;
-    status_t ret = p->setDataSource(url);
+    status_t ret = p->setMode(mMode);
+    if (ret == NO_ERROR) {
+        ret = p->setDataSource(url);
+    }
     if (ret == NO_ERROR) mRetriever = p;
     return ret;
 }
@@ -143,12 +140,6 @@
 {
     LOGV("setDataSource fd=%d, offset=%lld, length=%lld", fd, offset, length);
     Mutex::Autolock lock(mLock);
-    if (mRetriever == NULL) {
-        LOGE("retriever is not initialized");
-        ::close(fd);
-        return NO_INIT;
-    }
-
     struct stat sb;
     int ret = fstat(fd, &sb);
     if (ret != 0) {
@@ -178,7 +169,10 @@
         ::close(fd);
         return NO_INIT;
     }
-    status_t status = p->setDataSource(fd, offset, length);
+    status_t status = p->setMode(mMode);
+    if (status == NO_ERROR) {
+        p->setDataSource(fd, offset, length);
+    }
     if (status == NO_ERROR) mRetriever = p;
     ::close(fd);
     return status;
@@ -188,22 +182,30 @@
 {
     LOGV("setMode");
     Mutex::Autolock lock(mLock);
-    if (mRetriever == NULL) {
-        LOGE("retriever is not initialized");
-        return NO_INIT;
+    if (mode < METADATA_MODE_NOOP ||
+        mode > METADATA_MODE_FRAME_CAPTURE_AND_METADATA_RETRIEVAL) {
+        LOGE("invalid mode %d", mode);
+        return BAD_VALUE;
     }
-    return mRetriever->setMode(mode);
+    mMode = mode;
+    return NO_ERROR;
 }
 
 status_t MetadataRetrieverClient::getMode(int* mode) const
 {
     LOGV("getMode");
     Mutex::Autolock lock(mLock);
+
+    // TODO:
+    // This may not be necessary.
+    // If setDataSource() has not been called, return the cached value
+    // otherwise, return the value retrieved from the retriever
     if (mRetriever == NULL) {
-        LOGE("retriever is not initialized");
-        return NO_INIT;
+        *mode = mMode;
+    } else {
+        mRetriever->getMode(mode);
     }
-    return mRetriever->getMode(mode);
+    return NO_ERROR;
 }
 
 sp<IMemory> MetadataRetrieverClient::captureFrame()
diff --git a/media/libmediaplayerservice/MetadataRetrieverClient.h b/media/libmediaplayerservice/MetadataRetrieverClient.h
index 88d50bf..8cb8ad1 100644
--- a/media/libmediaplayerservice/MetadataRetrieverClient.h
+++ b/media/libmediaplayerservice/MetadataRetrieverClient.h
@@ -60,6 +60,7 @@
     mutable Mutex                          mLock;
     sp<MediaMetadataRetrieverBase>         mRetriever;
     pid_t                                  mPid;
+    int                                    mMode;
 
     // Keep the shared memory copy of album art and capture frame (for thumbnail)
     sp<MemoryDealer>                       mAlbumArtDealer;