Fix incorrect error returns from DRM plugin

Includes Widevine library release 4.5.0.4946

Bug 5223230

Change-Id: Ie68d3a821c22b3b0b9b720560fee6768838f1a08

proprietary/drmwvmplugin/include/WVDRMPluginAPI.h

@@ -63,7 +63,7 @@ class WVDRMPluginAPI {
     virtual bool RemoveRights(std::string &path) = 0;
     virtual bool RemoveAllRights() = 0;
     virtual bool Prepare(char *data, int len) = 0;
-    virtual bool Operate(char *in, char *out, int len, char *iv) = 0;
+    virtual int Operate(char *in, char *out, int len, char *iv) = 0;
 
     enum EventType {
         EventType_AcquireDrmInfoFailed,

proprietary/drmwvmplugin/src/WVMDrmPlugin.cpp

@@ -854,10 +854,18 @@ status_t WVMDrmPlugin::onDecrypt(int uniqueId, DecryptHandle* decryptHandle, int
 
     (*decBuffer)->length = encBuffer->length;
 
-    if (!mDrmPluginImpl->Operate(encBuffer->data, (*decBuffer)->data, encBuffer->length, iv)) {
+    int status;
+    status = mDrmPluginImpl->Operate(encBuffer->data, (*decBuffer)->data, encBuffer->length, iv);
+    if (status != WVDRMPluginAPI::RIGHTS_VALID) {
         (*decBuffer)->length = 0;
         usleep(1000000);  // prevent spinning
+        if (status == WVDRMPluginAPI::RIGHTS_NOT_ACQUIRED) {
+            return DRM_ERROR_NO_LICENSE;
+        } else if (status == WVDRMPluginAPI::RIGHTS_EXPIRED) {
             return DRM_ERROR_LICENSE_EXPIRED;
+        } else if (status == WVDRMPluginAPI::RIGHTS_INVALID) {
+            return DRM_ERROR_DECRYPT;
+        }
     }
 
     return DRM_NO_ERROR;