diff --git a/drm/crypto/1.0/ICryptoPlugin.hal b/drm/crypto/1.0/ICryptoPlugin.hal
index 2f7fd87..52c1d02 100644
--- a/drm/crypto/1.0/ICryptoPlugin.hal
+++ b/drm/crypto/1.0/ICryptoPlugin.hal
@@ -73,6 +73,8 @@
      * of clear and encrypted bytes to process. This allows the decrypt
      * call to operate on a range of subsamples in a single call
      * @param source the input buffer for the decryption
+     * @param offset the offset of the first byte of encrypted data from
+     * the base of the source buffer
      * @param destination the output buffer for the decryption
      * @return status the status of the call. The status must be OK or one of
      * the following errors: ERROR_DRM_NO_LICENSE if no license keys have been
@@ -89,6 +91,6 @@
      */
     decrypt(bool secure, uint8_t[16] keyId, uint8_t[16] iv, Mode mode,
         Pattern pattern, vec<SubSample> subSamples,
-            memory source, DestinationBuffer destination)
+            memory source, uint32_t offset, DestinationBuffer destination)
         generates(Status status, uint32_t bytesWritten, string detailedError);
 };
diff --git a/drm/crypto/1.0/default/CryptoPlugin.cpp b/drm/crypto/1.0/default/CryptoPlugin.cpp
index 6056f81..81365c8 100644
--- a/drm/crypto/1.0/default/CryptoPlugin.cpp
+++ b/drm/crypto/1.0/default/CryptoPlugin.cpp
@@ -54,7 +54,8 @@
             const hidl_array<uint8_t, 16>& keyId,
             const hidl_array<uint8_t, 16>& iv, Mode mode,
             const Pattern& pattern, const hidl_vec<SubSample>& subSamples,
-            const hidl_memory& source, const DestinationBuffer& destination,
+            const hidl_memory& source, uint32_t offset,
+            const DestinationBuffer& destination,
             decrypt_cb _hidl_cb) {
 
         android::CryptoPlugin::Mode legacyMode;
@@ -88,9 +89,14 @@
 
         AString detailMessage;
 
-        void *destPtr = NULL;
         sp<IMemory> sharedSourceMemory = mapMemory(source);
+
+        void *srcPtr = static_cast<void *>(sharedSourceMemory->getPointer());
+        uint8_t *offsetSrc = static_cast<uint8_t *>(srcPtr) + offset;
+        srcPtr = static_cast<void *>(offsetSrc);
+
         sp<IMemory> sharedDestinationMemory;
+        void *destPtr = NULL;
 
         if (destination.type == BufferType::SHARED_MEMORY) {
             sharedDestinationMemory = mapMemory(destination.nonsecureMemory);
@@ -102,8 +108,8 @@
             destPtr = static_cast<void *>(handle);
         }
         ssize_t result = mLegacyPlugin->decrypt(secure, keyId.data(), iv.data(),
-                legacyMode, legacyPattern, sharedSourceMemory->getPointer(),
-                legacySubSamples, subSamples.size(), destPtr, &detailMessage);
+                legacyMode, legacyPattern, srcPtr, legacySubSamples,
+                subSamples.size(), destPtr, &detailMessage);
 
         if (destination.type == BufferType::SHARED_MEMORY) {
             sharedDestinationMemory->commit();
diff --git a/drm/crypto/1.0/default/CryptoPlugin.h b/drm/crypto/1.0/default/CryptoPlugin.h
index 2c3032b..b1473f1 100644
--- a/drm/crypto/1.0/default/CryptoPlugin.h
+++ b/drm/crypto/1.0/default/CryptoPlugin.h
@@ -59,7 +59,8 @@
     Return<void> decrypt(bool secure, const hidl_array<uint8_t, 16>& keyId,
             const hidl_array<uint8_t, 16>& iv, Mode mode, const Pattern& pattern,
             const hidl_vec<SubSample>& subSamples, const hidl_memory& source,
-            const DestinationBuffer& destination, decrypt_cb _hidl_cb) override;
+            uint32_t offset, const DestinationBuffer& destination,
+            decrypt_cb _hidl_cb) override;
 
 private:
     android::CryptoPlugin *mLegacyPlugin;