Media Galleries API: Audio/Video attached pictures support.

content/public/browser/fileapi/blob_storage_host.h

+// Copyright 2014 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.
+
+#ifndef CONTENT_PUBLIC_BROWSER_FILEAPI_BLOB_STORAGE_HOST_H_
+#define CONTENT_PUBLIC_BROWSER_FILEAPI_BLOB_STORAGE_HOST_H_
+
+#include <string>
+
+#include "base/compiler_specific.h"
+#include "content/common/content_export.h"
+#include "webkit/common/blob/blob_data.h"
+
+class GURL;
+
+namespace webkit_blob {
+class BlobStorageContext;
+}
+
+using webkit_blob::BlobStorageContext;
+using webkit_blob::BlobData;
+
+namespace content {
+
+// This class handles the logistics of blob storage for a single child process.
+// There is one instance per child process. When the child process
+// terminates all blob references attibutable to that process go away upon
+// destruction of the instance. The class is single threaded and should
+// only be used on the IO thread.
+class CONTENT_EXPORT BlobStorageHost {
+ public:
+  virtual ~BlobStorageHost();
+
+  // Methods to support the IPC message protocol.
+  // A false return indicates a problem with the inputs
+  // like a non-existent or pre-existent uuid or url.
+  virtual bool StartBuildingBlob(const std::string& uuid) = 0;
+  virtual bool AppendBlobDataItem(const std::string& uuid,
+                                  const BlobData::Item& data_item) = 0;
+  virtual bool CancelBuildingBlob(const std::string& uuid) = 0;
+  virtual bool FinishBuildingBlob(const std::string& uuid,
+                                  const std::string& type) = 0;
+  virtual bool IncrementBlobRefCount(const std::string& uuid) = 0;
+  virtual bool DecrementBlobRefCount(const std::string& uuid) = 0;
+  virtual bool RegisterPublicBlobURL(const GURL& blob_url,
+                                     const std::string& uuid) = 0;
+  virtual bool RevokePublicBlobURL(const GURL& blob_url) = 0;
+};
+
+}  // namespace content
+
+#endif  // CONTENT_PUBLIC_BROWSER_FILEAPI_BLOB_STORAGE_HOST_H_