diff --git a/include/media/IHDCP.h b/include/media/IHDCP.h
index 6d27b18..54fefa3 100644
--- a/include/media/IHDCP.h
+++ b/include/media/IHDCP.h
@@ -17,6 +17,7 @@
 #include <binder/IInterface.h>
 #include <media/hardware/HDCPAPI.h>
 #include <media/stagefright/foundation/ABase.h>
+#include <ui/GraphicBuffer.h>
 
 namespace android {
 
@@ -59,6 +60,20 @@
             const void *inData, size_t size, uint32_t streamCTR,
             uint64_t *outInputCTR, void *outData) = 0;
 
+    // Encrypt data according to the HDCP spec. "size" bytes of data starting
+    // at location "offset" are available in "buffer" (buffer handle). "size"
+    // may not be a multiple of 128 bits (16 bytes). An equal number of
+    // encrypted bytes should be written to the buffer at "outData" (virtual
+    // address). This operation is to be synchronous, i.e. this call does not
+    // return until outData contains size bytes of encrypted data.
+    // streamCTR will be assigned by the caller (to 0 for the first PES stream,
+    // 1 for the second and so on)
+    // inputCTR _will_be_maintained_by_the_callee_ for each PES stream.
+    virtual status_t encryptNative(
+            const sp<GraphicBuffer> &graphicBuffer,
+            size_t offset, size_t size, uint32_t streamCTR,
+            uint64_t *outInputCTR, void *outData) = 0;
+
     // DECRYPTION only:
     // Decrypt data according to the HDCP spec.
     // "size" bytes of encrypted data are available at "inData"