Initial import of Widevine Common Encryption DRM engine

Builds libwvmdrmengine.so, which is loaded by the new
MediaDrm APIs to support playback of Widevine/CENC
protected content.

Change-Id: I6f57dd37083dfd96c402cb9dd137c7d74edc8f1c

libwvdrmengine/cdm/include/wv_content_decryption_module.h

@@ -0,0 +1,81 @@
+// Copyright 2013 Google Inc. All Rights Reserved.
+
+#ifndef CDM_BASE_WV_CONTENT_DECRYPTION_MODULE_H_
+#define CDM_BASE_WV_CONTENT_DECRYPTION_MODULE_H_
+
+#include "wv_cdm_types.h"
+
+#include "utils/UniquePtr.h"
+
+namespace wvcdm {
+
+class CdmEngine;
+class WvCdmEventListener;
+
+class WvContentDecryptionModule {
+ public:
+  WvContentDecryptionModule();
+  virtual ~WvContentDecryptionModule();
+
+  // Session related methods
+  virtual CdmResponseType OpenSession(const CdmKeySystem& key_system,
+                                      CdmSessionId* session_id);
+  virtual CdmResponseType CloseSession(CdmSessionId& session_id);
+
+  // Construct a valid license request.
+  virtual CdmResponseType GenerateKeyRequest(const CdmSessionId& session_id,
+                                             const CdmInitData& init_data,
+                                             const CdmLicenseType license_type,
+                                             CdmNameValueMap& app_parameters,
+                                             CdmKeyMessage* key_request);
+
+  // Accept license response and extract key info.
+  virtual CdmResponseType AddKey(const CdmSessionId& session_id,
+                                 const CdmKeyResponse& key_data);
+
+  // Cancel session
+  virtual CdmResponseType CancelKeyRequest(const CdmSessionId& session_id);
+
+  // Query license information
+  virtual CdmResponseType QueryKeyStatus(const CdmSessionId& session_id,
+                                         CdmNameValueMap* key_info);
+
+  // Provisioning related methods
+  virtual CdmResponseType GetProvisioningRequest(
+      CdmProvisioningRequest* request,
+      std::string* default_url);
+
+  virtual CdmResponseType HandleProvisioningResponse(
+      CdmProvisioningResponse& response);
+
+  // Secure stop related methods
+  virtual CdmResponseType GetSecureStops(CdmSecureStops* secure_stops);
+  virtual CdmResponseType ReleaseSecureStops(
+      const CdmSecureStopReleaseMessage& message);
+
+  // Accept encrypted buffer and return decrypted data.
+  virtual CdmResponseType Decrypt(const CdmSessionId& session_id,
+                                  bool is_encrypted,
+                                  const KeyId& key_id,
+                                  const uint8_t* encrypted_buffer,
+                                  size_t encrypted_size,
+                                  const std::vector<uint8_t>& iv,
+                                  size_t block_offset,
+                                  void* decrypted_buffer);
+
+  // Event listener related methods
+  virtual bool AttachEventListener(CdmSessionId& session_id,
+                                   WvCdmEventListener* listener);
+  virtual bool DetachEventListener(CdmSessionId& session_id,
+                                   WvCdmEventListener* listener);
+ private:
+
+  // instance variables
+  UniquePtr<CdmEngine> cdm_engine_;
+
+  CORE_DISALLOW_COPY_AND_ASSIGN(WvContentDecryptionModule);
+};
+
+}  // namespace wvcdm
+
+#endif  // CDM_BASE_WV_CONTENT_DECRYPTION_MODULE_H_