[Android] JNI binding for MediaDrmCredentialManager

content/browser/media/android/media_drm_credential_manager.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/media/android/media_drm_credential_manager.h"
 
+#include "base/android/jni_android.h"
+#include "base/android/scoped_java_ref.h"
 #include "base/bind.h"
 #include "base/callback_helpers.h"
+#include "jni/MediaDrmCredentialManager_jni.h"
 #include "media/base/android/media_drm_bridge.h"
 #include "url/gurl.h"
 
+using base::android::ScopedJavaGlobalRef;
+
+namespace {
+
+void MediaDrmCredentialManagerCallback(
+    const ScopedJavaGlobalRef<jobject>& j_media_drm_credential_manager_callback,
+    bool succeeded) {
+  JNIEnv* env = base::android::AttachCurrentThread();
+  content::Java_MediaDrmCredentialManagerCallback_onCredentialResetFinished(
+      env, j_media_drm_credential_manager_callback.obj(), succeeded);
+}
+
+}  // namespace
+
 namespace content {
 
 // TODO(qinmin): Move the UUID definition to some common places.
 static const uint8 kWidevineUuid[16] = {
     0xED, 0xEF, 0x8B, 0xA9, 0x79, 0xD6, 0x4A, 0xCE,
     0xA3, 0xC8, 0x27, 0xDC, 0xD5, 0x1D, 0x21, 0xED };
 
-MediaDrmCredentialManager::MediaDrmCredentialManager() {}
+MediaDrmCredentialManager::MediaDrmCredentialManager() {};
 
-MediaDrmCredentialManager::~MediaDrmCredentialManager() {}
+MediaDrmCredentialManager::~MediaDrmCredentialManager() {};
+
+// static
+MediaDrmCredentialManager* MediaDrmCredentialManager::GetInstance() {
+  return Singleton<MediaDrmCredentialManager>::get();
+}
 
 void MediaDrmCredentialManager::ResetCredentials(
     const ResetCredentialsCB& callback) {
   // Ignore reset request if one is already in progress.
   if (!reset_credentials_cb_.is_null())
     return;
 
   reset_credentials_cb_ = callback;
 
   // First reset the L3 credential.
   if (!ResetCredentialsInternal("L3")) {
     // TODO(qinmin): We should post a task instead.
     base::ResetAndReturn(&reset_credentials_cb_).Run(false);
   }
 }
 
+// static
+void ResetCredentials(
+    JNIEnv* env,
+    jclass clazz,
+    jobject j_media_drm_credential_manager_callback) {
+  MediaDrmCredentialManager* media_drm_credential_manager =
+      MediaDrmCredentialManager::GetInstance();
+
+  ScopedJavaGlobalRef<jobject> j_scoped_media_drm_credential_manager_callback;
+  j_scoped_media_drm_credential_manager_callback.Reset(
+      env, j_media_drm_credential_manager_callback);
+
+  MediaDrmCredentialManager::ResetCredentialsCB callback_runner =
+      base::Bind(&MediaDrmCredentialManagerCallback,
+                 j_scoped_media_drm_credential_manager_callback);
+
+  media_drm_credential_manager->ResetCredentials(callback_runner);
+}
+
 void MediaDrmCredentialManager::OnResetCredentialsCompleted(
     const std::string& security_level, bool success) {
   if (security_level == "L3" && success) {
     if (ResetCredentialsInternal("L1"))
       return;
     success = false;
   }
 
   base::ResetAndReturn(&reset_credentials_cb_).Run(success);
   media_drm_bridge_.reset();
 }
 
 bool MediaDrmCredentialManager::ResetCredentialsInternal(
     const std::string& security_level) {
   std::vector<uint8> uuid(kWidevineUuid, kWidevineUuid + 16);
   media_drm_bridge_ = media::MediaDrmBridge::Create(
       0, uuid, GURL(), security_level, NULL);
   if (!media_drm_bridge_)
     return false;
   media_drm_bridge_->ResetDeviceCredentials(
       base::Bind(&MediaDrmCredentialManager::OnResetCredentialsCompleted,
                  base::Unretained(this), security_level));
   return true;
 }
 
+// static
+bool MediaDrmCredentialManager::RegisterMediaDrmCredentialManager(JNIEnv* env) {
+  return RegisterNativesImpl(env);
+}
+
 }  // namespace content