diff --git a/audio/7.0/types.hal b/audio/7.0/types.hal
index 4a9e289..7c050c1 100644
--- a/audio/7.0/types.hal
+++ b/audio/7.0/types.hal
@@ -30,7 +30,6 @@
     NOT_SUPPORTED
 };
 
-@export(name="audio_drain_type_t", value_prefix="AUDIO_DRAIN_")
 enum AudioDrain : int32_t {
     /** drain() returns when all data has been played. */
     ALL,
@@ -315,7 +314,7 @@
  * Behavior when the values for speed and / or pitch are out
  * of applicable range.
  */
-@export(name="audio_timestretch_fallback_mode_t", value_prefix="AUDIO_TIMESTRETCH_FALLBACK_")
+@export(name="", value_prefix="HAL_AUDIO_TIMESTRETCH_FALLBACK_")
 enum TimestretchFallbackMode : int32_t {
     // Need to be in sync with AUDIO_FALLBACK_MODE_* constants in
     // frameworks/base/media/java/android/media/PlaybackParams.java
diff --git a/audio/common/7.0/types.hal b/audio/common/7.0/types.hal
index 0d0fa7e..631d524 100644
--- a/audio/common/7.0/types.hal
+++ b/audio/common/7.0/types.hal
@@ -78,6 +78,7 @@
  */
 typedef int32_t AudioSession;
 
+@export(name="", value_prefix="HAL_AUDIO_SESSION_")
 enum AudioSessionConsts : int32_t {
     /**
      * Session for effects attached to a particular sink or source audio device
@@ -137,7 +138,7 @@
  * Major modes for a mobile device. The current mode setting affects audio
  * routing.
  */
-@export(name="audio_mode_t", value_prefix="AUDIO_MODE_")
+@export(name="", value_prefix="HAL_AUDIO_MODE_")
 enum AudioMode : int32_t {
     NORMAL           = 0,
     RINGTONE         = 1,
@@ -222,6 +223,27 @@
 };
 
 /**
+ * Enumeration of metadata types permitted for use by
+ * encapsulation mode audio streams.
+ */
+@export(name="audio_encapsulation_metadata_type_t", value_prefix="AUDIO_ENCAPSULATION_METADATA_TYPE_")
+enum AudioEncapsulationMetadataType : int32_t {
+    /**
+     * No metadata.
+     */
+    NONE              = 0,
+    /**
+     * Encapsulation metadata type for framework tuner information.
+     */
+    FRAMEWORK_TUNER   = 1,
+    /**
+     * Encapsulation metadata type for DVB AD descriptor.
+     * This metadata is formatted per ETSI TS 101 154 Table E.1: AD_descriptor.
+     */
+    DVB_AD_DESCRIPTOR = 2,
+};
+
+/**
  * Additional information about the stream passed to hardware decoders.
  */
 struct AudioOffloadInfo {
diff --git a/audio/core/all-versions/default/StreamOut.cpp b/audio/core/all-versions/default/StreamOut.cpp
index 1519c48..007eb45 100644
--- a/audio/core/all-versions/default/StreamOut.cpp
+++ b/audio/core/all-versions/default/StreamOut.cpp
@@ -496,11 +496,11 @@
 }
 
 Return<Result> StreamOut::drain(AudioDrain type) {
+    audio_drain_type_t halDrainType =
+            type == AudioDrain::EARLY_NOTIFY ? AUDIO_DRAIN_EARLY_NOTIFY : AUDIO_DRAIN_ALL;
     return mStream->drain != NULL
-                   ? Stream::analyzeStatus(
-                             "drain",
-                             mStream->drain(mStream, static_cast<audio_drain_type_t>(type)),
-                             {ENOSYS} /*ignore*/)
+                   ? Stream::analyzeStatus("drain", mStream->drain(mStream, halDrainType),
+                                           {ENOSYS} /*ignore*/)
                    : Result::NOT_SUPPORTED;
 }
 
diff --git a/update-base-files.sh b/update-base-files.sh
index daaa530..d01847d 100755
--- a/update-base-files.sh
+++ b/update-base-files.sh
@@ -42,8 +42,11 @@
 
 # system/media
 hidl-gen $options \
+         -o $ANDROID_BUILD_TOP/system/media/audio/include/system/audio_common-base.h \
+         android.hardware.audio.common@7.0
+hidl-gen $options \
          -o $ANDROID_BUILD_TOP/system/media/audio/include/system/audio-base.h \
-         android.hardware.audio.common@2.0
+         android.hardware.audio@7.0
 hidl-gen $options \
          -o $ANDROID_BUILD_TOP/system/media/audio/include/system/audio_effect-base.h \
-         android.hardware.audio.effect@2.0
+         android.hardware.audio.effect@7.0