fix BufferItem flatten/unflatten alignment

bug: 21370100
Change-Id: Ia3991dc591c176bdbd1d78d1804aa22777525b62
diff --git a/libs/gui/BufferItem.cpp b/libs/gui/BufferItem.cpp
index 5793d40..8f64ae0 100644
--- a/libs/gui/BufferItem.cpp
+++ b/libs/gui/BufferItem.cpp
@@ -46,15 +46,16 @@
 }
 
 size_t BufferItem::getPodSize() const {
-    // Must align<8> before writing these fields for this to be correct
     size_t size = 0;
     addAligned(size, mCrop);
     addAligned(size, mTransform);
     addAligned(size, mScalingMode);
-    addAligned(size, mTimestamp);
+    addAligned(size, mTimestampLo);
+    addAligned(size, mTimestampHi);
     addAligned(size, mIsAutoTimestamp);
     addAligned(size, mDataSpace);
-    addAligned(size, mFrameNumber);
+    addAligned(size, mFrameNumberLo);
+    addAligned(size, mFrameNumberHi);
     addAligned(size, mSlot);
     addAligned(size, mIsDroppable);
     addAligned(size, mAcquireCalled);
@@ -126,9 +127,6 @@
     if (err) return err;
     FlattenableUtils::advance(buffer, size, mSurfaceDamage.getFlattenedSize());
 
-    // Must align<8> so that getPodSize returns the correct value
-    size -= FlattenableUtils::align<8>(buffer);
-
     // Check we still have enough space
     if (size < getPodSize()) {
         return NO_MEMORY;
@@ -137,10 +135,12 @@
     writeAligned(buffer, size, mCrop);
     writeAligned(buffer, size, mTransform);
     writeAligned(buffer, size, mScalingMode);
-    writeAligned(buffer, size, mTimestamp);
+    writeAligned(buffer, size, mTimestampLo);
+    writeAligned(buffer, size, mTimestampHi);
     writeAligned(buffer, size, mIsAutoTimestamp);
     writeAligned(buffer, size, mDataSpace);
-    writeAligned(buffer, size, mFrameNumber);
+    writeAligned(buffer, size, mFrameNumberLo);
+    writeAligned(buffer, size, mFrameNumberHi);
     writeAligned(buffer, size, mSlot);
     writeAligned(buffer, size, mIsDroppable);
     writeAligned(buffer, size, mAcquireCalled);
@@ -183,9 +183,6 @@
     if (err) return err;
     FlattenableUtils::advance(buffer, size, mSurfaceDamage.getFlattenedSize());
 
-    // Must align<8> so that getPodSize returns the correct value
-    size -= FlattenableUtils::align<8>(buffer);
-
     // Check we still have enough space
     if (size < getPodSize()) {
         return NO_MEMORY;
@@ -194,10 +191,12 @@
     readAligned(buffer, size, mCrop);
     readAligned(buffer, size, mTransform);
     readAligned(buffer, size, mScalingMode);
-    readAligned(buffer, size, mTimestamp);
+    readAligned(buffer, size, mTimestampLo);
+    readAligned(buffer, size, mTimestampHi);
     readAligned(buffer, size, mIsAutoTimestamp);
     readAligned(buffer, size, mDataSpace);
-    readAligned(buffer, size, mFrameNumber);
+    readAligned(buffer, size, mFrameNumberLo);
+    readAligned(buffer, size, mFrameNumberHi);
     readAligned(buffer, size, mSlot);
     readAligned(buffer, size, mIsDroppable);
     readAligned(buffer, size, mAcquireCalled);