diff --git a/drm/1.0/ICryptoPlugin.hal b/drm/1.0/ICryptoPlugin.hal
index d66151e..ca8fa50 100644
--- a/drm/1.0/ICryptoPlugin.hal
+++ b/drm/1.0/ICryptoPlugin.hal
@@ -62,8 +62,16 @@
      * After the shared buffer base is established, the decrypt() method
      * receives SharedBuffer instances which specify the buffer address range
      * for decrypt source and destination addresses.
+     *
+     * There can be multiple shared buffers per crypto plugin. The buffers
+     * are distinguished by the bufferId.
+     *
+     * @param base the base IMemory of the memory buffer identified by
+     * bufferId
+     * @param bufferId identifies the specific shared buffer for which
+     * the base is being set.
      */
-    setSharedBufferBase(memory base);
+    setSharedBufferBase(memory base, uint32_t bufferId);
 
     /**
      * Decrypt an array of subsamples from the source memory buffer to the
diff --git a/drm/1.0/default/CryptoPlugin.cpp b/drm/1.0/default/CryptoPlugin.cpp
index fb61ede..4a4171b 100644
--- a/drm/1.0/default/CryptoPlugin.cpp
+++ b/drm/1.0/default/CryptoPlugin.cpp
@@ -49,8 +49,9 @@
         return toStatus(mLegacyPlugin->setMediaDrmSession(toVector(sessionId)));
     }
 
-    Return<void> CryptoPlugin::setSharedBufferBase(const hidl_memory& base) {
-        mSharedBufferBase = mapMemory(base);
+    Return<void> CryptoPlugin::setSharedBufferBase(const hidl_memory& base,
+            uint32_t bufferId) {
+        mSharedBufferMap[bufferId] = mapMemory(base);
         return Void();
     }
 
@@ -62,11 +63,19 @@
             const DestinationBuffer& destination,
             decrypt_cb _hidl_cb) {
 
-        if (mSharedBufferBase == NULL) {
-            _hidl_cb(Status::BAD_VALUE, 0, "decrypt buffer base not set");
+        if (mSharedBufferMap.find(source.bufferId) == mSharedBufferMap.end()) {
+            _hidl_cb(Status::ERROR_DRM_CANNOT_HANDLE, 0, "source decrypt buffer base not set");
             return Void();
         }
 
+        if (destination.type == BufferType::SHARED_MEMORY) {
+            const SharedBuffer& dest = destination.nonsecureMemory;
+            if (mSharedBufferMap.find(dest.bufferId) == mSharedBufferMap.end()) {
+                _hidl_cb(Status::ERROR_DRM_CANNOT_HANDLE, 0, "destination decrypt buffer base not set");
+                return Void();
+            }
+        }
+
         android::CryptoPlugin::Mode legacyMode;
         switch(mode) {
         case Mode::UNENCRYPTED:
@@ -97,20 +106,22 @@
         }
 
         AString detailMessage;
+        sp<IMemory> sourceBase = mSharedBufferMap[source.bufferId];
 
-        if (source.offset + offset + source.size > mSharedBufferBase->getSize()) {
+        if (source.offset + offset + source.size > sourceBase->getSize()) {
             _hidl_cb(Status::ERROR_DRM_CANNOT_HANDLE, 0, "invalid buffer size");
             return Void();
         }
 
         uint8_t *base = static_cast<uint8_t *>
-                (static_cast<void *>(mSharedBufferBase->getPointer()));
+                (static_cast<void *>(sourceBase->getPointer()));
         void *srcPtr = static_cast<void *>(base + source.offset + offset);
 
         void *destPtr = NULL;
         if (destination.type == BufferType::SHARED_MEMORY) {
             const SharedBuffer& destBuffer = destination.nonsecureMemory;
-            if (destBuffer.offset + destBuffer.size > mSharedBufferBase->getSize()) {
+            sp<IMemory> destBase = mSharedBufferMap[destBuffer.bufferId];
+            if (destBuffer.offset + destBuffer.size > destBase->getSize()) {
                 _hidl_cb(Status::ERROR_DRM_CANNOT_HANDLE, 0, "invalid buffer size");
                 return Void();
             }
diff --git a/drm/1.0/default/CryptoPlugin.h b/drm/1.0/default/CryptoPlugin.h
index f805f09..11cc2aa 100644
--- a/drm/1.0/default/CryptoPlugin.h
+++ b/drm/1.0/default/CryptoPlugin.h
@@ -57,8 +57,8 @@
     Return<Status> setMediaDrmSession(const hidl_vec<uint8_t>& sessionId)
             override;
 
-    Return<void> setSharedBufferBase(const ::android::hardware::hidl_memory& base)
-            override;
+    Return<void> setSharedBufferBase(const ::android::hardware::hidl_memory& base,
+        uint32_t bufferId) override;
 
     Return<void> decrypt(bool secure, const hidl_array<uint8_t, 16>& keyId,
             const hidl_array<uint8_t, 16>& iv, Mode mode, const Pattern& pattern,
@@ -68,7 +68,7 @@
 
 private:
     android::CryptoPlugin *mLegacyPlugin;
-    sp<IMemory> mSharedBufferBase;
+    std::map<uint32_t, sp<IMemory> > mSharedBufferMap;
 
     CryptoPlugin() = delete;
     CryptoPlugin(const CryptoPlugin &) = delete;
diff --git a/drm/1.0/types.hal b/drm/1.0/types.hal
index 33bbf9a..5273044 100644
--- a/drm/1.0/types.hal
+++ b/drm/1.0/types.hal
@@ -293,12 +293,18 @@
 };
 
 /**
- * A SharedBuffer describes a decrypt buffer which is defined by an offset and
- * a size.  The offset is relative to the shared memory base which is established
- * using setSharedMemoryBase().
+ * SharedBuffer describes a decrypt buffer which is defined by a bufferId, an
+ * offset and a size.  The offset is relative to the shared memory base for the
+ * memory region identified by bufferId, which is established by
+ * setSharedMemoryBase().
  */
 struct SharedBuffer {
     /**
+     * The unique buffer identifier
+     */
+    uint32_t bufferId;
+
+    /**
      * The offset from the shared memory base
      */
     uint64_t offset;