Media Galleries API: Audio/Video attached pictures support.

content/browser/fileapi/blob_storage_host_impl.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_BROWSER_FILEAPI_BLOB_STORAGE_HOST_IMPL_H_
+#define CONTENT_BROWSER_FILEAPI_BLOB_STORAGE_HOST_IMPL_H_
+
+#include <map>
+#include <set>
+#include <string>
+
+#include "base/compiler_specific.h"
+#include "base/memory/weak_ptr.h"
+#include "content/common/content_export.h"
+#include "content/public/browser/fileapi/blob_storage_host.h"
+
+class GURL;
+
+namespace webkit_blob {
+class BlobDataHandle;
+class BlobStorageContext;
+}
+
+using webkit_blob::BlobStorageContext;
+using webkit_blob::BlobData;
+
+namespace content {
+
+// This is the implementation of BlobStorageHost.
+class CONTENT_EXPORT BlobStorageHostImpl : public BlobStorageHost {
+ public:
+  explicit BlobStorageHostImpl(BlobStorageContext* context);
+  virtual ~BlobStorageHostImpl();
+
+  // BlobStorageHost implementation:
+  virtual bool StartBuildingBlob(
+      const std::string& uuid) OVERRIDE WARN_UNUSED_RESULT;
+  virtual bool AppendBlobDataItem(
+      const std::string& uuid,
+      const BlobData::Item& data_item) OVERRIDE WARN_UNUSED_RESULT;
+  virtual bool CancelBuildingBlob(
+      const std::string& uuid) OVERRIDE WARN_UNUSED_RESULT;
+  virtual bool FinishBuildingBlob(
+      const std::string& uuid,
+      const std::string& type) OVERRIDE WARN_UNUSED_RESULT;
+  virtual bool IncrementBlobRefCount(
+      const std::string& uuid) OVERRIDE WARN_UNUSED_RESULT;
+  virtual bool DecrementBlobRefCount(
+      const std::string& uuid) OVERRIDE WARN_UNUSED_RESULT;
+  virtual bool RegisterPublicBlobURL(
+      const GURL& blob_url,
+      const std::string& uuid) OVERRIDE WARN_UNUSED_RESULT;
+  virtual bool RevokePublicBlobURL(
+      const GURL& blob_url) OVERRIDE WARN_UNUSED_RESULT;
+
+ private:
+  typedef std::map<std::string, int> BlobReferenceMap;
+
+  bool IsInUseInHost(const std::string& uuid);
+  bool IsBeingBuiltInHost(const std::string& uuid);
+  bool IsUrlRegisteredInHost(const GURL& blob_url);
+
+  // Collection of blob ids and a count of how many usages
+  // of that id are attributable to this consumer.
+  BlobReferenceMap blobs_inuse_map_;
+
+  // The set of public blob urls coined by this consumer.
+  std::set<GURL> public_blob_urls_;
+
+  base::WeakPtr<BlobStorageContext> context_;
+
+  DISALLOW_COPY_AND_ASSIGN(BlobStorageHostImpl);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_FILEAPI_BLOB_STORAGE_HOST_IMPL_H_