diff --git a/include/media/stagefright/MetaData.h b/include/media/stagefright/MetaData.h
index 00b8679..c3ccb56 100644
--- a/include/media/stagefright/MetaData.h
+++ b/include/media/stagefright/MetaData.h
@@ -24,6 +24,7 @@
 
 #include <utils/RefBase.h>
 #include <utils/KeyedVector.h>
+#include <utils/String8.h>
 
 namespace android {
 
@@ -180,6 +181,8 @@
     bool findData(uint32_t key, uint32_t *type,
                   const void **data, size_t *size) const;
 
+    void dumpToLog() const;
+
 protected:
     virtual ~MetaData();
 
@@ -194,6 +197,7 @@
         void clear();
         void setData(uint32_t type, const void *data, size_t size);
         void getData(uint32_t *type, const void **data, size_t *size) const;
+        String8 asString() const;
 
     private:
         uint32_t mType;
diff --git a/media/libstagefright/MPEG4Extractor.cpp b/media/libstagefright/MPEG4Extractor.cpp
index 6c95d4e..663f285 100644
--- a/media/libstagefright/MPEG4Extractor.cpp
+++ b/media/libstagefright/MPEG4Extractor.cpp
@@ -599,6 +599,7 @@
 }
 
 status_t MPEG4Extractor::parseChunk(off64_t *offset, int depth) {
+    ALOGV("entering parseChunk %lld/%d", *offset, depth);
     uint32_t hdr[2];
     if (mDataSource->readAt(*offset, hdr, 8) < 8) {
         return ERROR_IO;
@@ -625,6 +626,7 @@
 
     char chunk[5];
     MakeFourCCString(chunk_type, chunk);
+    ALOGV("chunk: %s @ %lld", chunk, *offset);
 
 #if 0
     static const char kWhitespace[] = "                                        ";
@@ -1302,6 +1304,8 @@
             break;
         }
 
+        case FOURCC('m', 'e', 'a', 'n'):
+        case FOURCC('n', 'a', 'm', 'e'):
         case FOURCC('d', 'a', 't', 'a'):
         {
             if (mPath.size() == 6 && underMetaDataPath(mPath)) {
@@ -1437,6 +1441,15 @@
             break;
         }
 
+        case FOURCC('-', '-', '-', '-'):
+        {
+            mLastCommentMean.clear();
+            mLastCommentName.clear();
+            mLastCommentData.clear();
+            *offset += chunk_size;
+            break;
+        }
+
         default:
         {
             *offset += chunk_size;
@@ -1553,6 +1566,9 @@
     uint32_t flags = U32_AT(buffer);
 
     uint32_t metadataKey = 0;
+    char chunk[5];
+    MakeFourCCString(mPath[4], chunk);
+    ALOGV("meta: %s @ %lld", chunk, offset);
     switch (mPath[4]) {
         case FOURCC(0xa9, 'a', 'l', 'b'):
         {
@@ -1632,6 +1648,35 @@
             }
             break;
         }
+        case FOURCC('-', '-', '-', '-'):
+        {
+            buffer[size] = '\0';
+            switch (mPath[5]) {
+                case FOURCC('m', 'e', 'a', 'n'):
+                    mLastCommentMean.setTo((const char *)buffer + 4);
+                    break;
+                case FOURCC('n', 'a', 'm', 'e'):
+                    mLastCommentName.setTo((const char *)buffer + 4);
+                    break;
+                case FOURCC('d', 'a', 't', 'a'):
+                    mLastCommentData.setTo((const char *)buffer + 8);
+                    break;
+            }
+            if (mLastCommentMean == "com.apple.iTunes"
+                    && mLastCommentName == "iTunSMPB"
+                    && mLastCommentData.length() != 0) {
+                int32_t delay, padding;
+                if (sscanf(mLastCommentData,
+                           " %*x %x %x %*x", &delay, &padding) == 2) {
+                    mLastTrack->meta->setInt32(kKeyEncoderDelay, delay);
+                    mLastTrack->meta->setInt32(kKeyEncoderPadding, padding);
+                }
+                mLastCommentMean.clear();
+                mLastCommentName.clear();
+                mLastCommentData.clear();
+            }
+            break;
+        }
 
         default:
             break;
diff --git a/media/libstagefright/MetaData.cpp b/media/libstagefright/MetaData.cpp
index 66dec90..755594a 100644
--- a/media/libstagefright/MetaData.cpp
+++ b/media/libstagefright/MetaData.cpp
@@ -14,6 +14,10 @@
  * limitations under the License.
  */
 
+//#define LOG_NDEBUG 0
+#define LOG_TAG "MetaData"
+#include <utils/Log.h>
+
 #include <stdlib.h>
 #include <string.h>
 
@@ -282,5 +286,60 @@
     mSize = 0;
 }
 
+String8 MetaData::typed_data::asString() const {
+    String8 out;
+    const void *data = storage();
+    switch(mType) {
+        case TYPE_NONE:
+            out = String8::format("no type, size %d)", mSize);
+            break;
+        case TYPE_C_STRING:
+            out = String8::format("(char*) %s", (const char *)data);
+            break;
+        case TYPE_INT32:
+            out = String8::format("(int32_t) %d", *(int32_t *)data);
+            break;
+        case TYPE_INT64:
+            out = String8::format("(int64_t) %lld", *(int64_t *)data);
+            break;
+        case TYPE_FLOAT:
+            out = String8::format("(float) %f", *(float *)data);
+            break;
+        case TYPE_POINTER:
+            out = String8::format("(void*) %p", *(void **)data);
+            break;
+        case TYPE_RECT:
+        {
+            const Rect *r = (const Rect *)data;
+            out = String8::format("Rect(%d, %d, %d, %d)",
+                                  r->mLeft, r->mTop, r->mRight, r->mBottom);
+            break;
+        }
+
+        default:
+            out = String8::format("(unknown type %d, size %d)", mType, mSize);
+            break;
+    }
+    return out;
+}
+
+static void MakeFourCCString(uint32_t x, char *s) {
+    s[0] = x >> 24;
+    s[1] = (x >> 16) & 0xff;
+    s[2] = (x >> 8) & 0xff;
+    s[3] = x & 0xff;
+    s[4] = '\0';
+}
+
+void MetaData::dumpToLog() const {
+    for (int i = mItems.size(); --i >= 0;) {
+        int32_t key = mItems.keyAt(i);
+        char cc[5];
+        MakeFourCCString(key, cc);
+        const typed_data &item = mItems.valueAt(i);
+        ALOGI("%s: %s", cc, item.asString().string());
+    }
+}
+
 }  // namespace android
 
diff --git a/media/libstagefright/include/MPEG4Extractor.h b/media/libstagefright/include/MPEG4Extractor.h
index eae62c6..5c549e0 100644
--- a/media/libstagefright/include/MPEG4Extractor.h
+++ b/media/libstagefright/include/MPEG4Extractor.h
@@ -20,6 +20,7 @@
 
 #include <media/stagefright/MediaExtractor.h>
 #include <utils/Vector.h>
+#include <utils/String8.h>
 
 namespace android {
 
@@ -64,6 +65,9 @@
     sp<MetaData> mFileMetaData;
 
     Vector<uint32_t> mPath;
+    String8 mLastCommentMean;
+    String8 mLastCommentName;
+    String8 mLastCommentData;
 
     status_t readMetaData();
     status_t parseChunk(off64_t *offset, int depth);
diff --git a/services/audioflinger/AudioFlinger.cpp b/services/audioflinger/AudioFlinger.cpp
index 3ab4e34..e92e69c 100644
--- a/services/audioflinger/AudioFlinger.cpp
+++ b/services/audioflinger/AudioFlinger.cpp
@@ -3481,23 +3481,27 @@
             const sp<IMemory>& sharedBuffer,
             int sessionId)
     :   TrackBase(thread, client, sampleRate, format, channelMask, frameCount, sharedBuffer, sessionId),
-    mMute(false), mSharedBuffer(sharedBuffer), mName(-1), mMainBuffer(NULL), mAuxBuffer(NULL),
+    mMute(false),
+    // mFillingUpStatus ?
+    // mRetryCount initialized later when needed
+    mSharedBuffer(sharedBuffer),
+    mStreamType(streamType),
+    mName(-1),  // see note below
+    mMainBuffer(thread->mixBuffer()),
+    mAuxBuffer(NULL),
     mAuxEffectId(0), mHasVolumeController(false)
 {
     if (mCblk != NULL) {
-        if (thread != NULL) {
-            mName = thread->getTrackName_l();
-            mMainBuffer = thread->mixBuffer();
-        }
-        ALOGV("Track constructor name %d, calling pid %d", mName, IPCThreadState::self()->getCallingPid());
-        if (mName < 0) {
-            ALOGE("no more track names available");
-        }
-        mStreamType = streamType;
         // NOTE: audio_track_cblk_t::frameSize for 8 bit PCM data is based on a sample size of
         // 16 bit because data is converted to 16 bit before being stored in buffer by AudioTrack
         mCblk->frameSize = audio_is_linear_pcm(format) ? mChannelCount * sizeof(int16_t) : sizeof(uint8_t);
+        // to avoid leaking a track name, do not allocate one unless there is an mCblk
+        mName = thread->getTrackName_l();
+        if (mName < 0) {
+            ALOGE("no more track names available");
+        }
     }
+    ALOGV("Track constructor name %d, calling pid %d", mName, IPCThreadState::self()->getCallingPid());
 }
 
 AudioFlinger::PlaybackThread::Track::~Track()
diff --git a/services/audioflinger/AudioFlinger.h b/services/audioflinger/AudioFlinger.h
index 7a57613..d1950a3 100644
--- a/services/audioflinger/AudioFlinger.h
+++ b/services/audioflinger/AudioFlinger.h
@@ -681,9 +681,9 @@
             enum {FS_FILLING, FS_FILLED, FS_ACTIVE};
             mutable uint8_t     mFillingUpStatus;
             int8_t              mRetryCount;
-            sp<IMemory>         mSharedBuffer;
+            const sp<IMemory>   mSharedBuffer;
             bool                mResetDone;
-            audio_stream_type_t mStreamType;
+            const audio_stream_type_t mStreamType;
             int                 mName;
             int16_t             *mMainBuffer;
             int32_t             *mAuxBuffer;