Isolated FS for media devices.

webkit/fileapi/media_device_map_service.h

Index: webkit/fileapi/media_device_map_service.h
diff --git a/webkit/fileapi/media_device_map_service.h b/webkit/fileapi/media_device_map_service.h
new file mode 100644
index 0000000000000000000000000000000000000000..04a5475b3e69d20037aa20144bb729f6dd33e51b
--- /dev/null
+++ b/webkit/fileapi/media_device_map_service.h
@@ -0,0 +1,59 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.

[kinuko, 2012/07/25 23:22:28]

A suggestion-- I think it'd be better to create a new directory, e.g.
webkit/fileapi/media and put all these media FS specific details into the dir. 
Then eventually you'll want to have its own OWNERS file for the directory so
that Media Gallery team can touch the files under the directory more freely.
WDYT?

[kmadhusu, 2012/07/27 02:13:40]

Done.

+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef WEBKIT_FILEAPI_MEDIA_DEVICE_MAP_SERVICE_H_
+#define WEBKIT_FILEAPI_MEDIA_DEVICE_MAP_SERVICE_H_
+
+#include <map>
+
+#include "base/file_path.h"
+#include "base/memory/ref_counted.h"
+#include "base/memory/singleton.h"
+#include "base/synchronization/lock.h"
+
+namespace fileapi {
+
+#if defined(OS_WIN)
+class MtpDeviceInterfaceWin;
+typedef class MtpDeviceInterfaceWin MediaDeviceInterfaceImpl;
+#elif defined(OS_POSIX) && !defined(OS_MACOSX)
+class MtpDeviceInterfaceLinux;
+typedef class MtpDeviceInterfaceLinux MediaDeviceInterfaceImpl;
+#endif
+
+// Helper class to manage MTP device interfaces.
+class MediaDeviceMapService {
+ public:
+  static MediaDeviceMapService* GetInstance();
+
+  void AddMediaDevice(const FilePath::StringType& device_id);
+
+  // TODO(kmadhusu): Implement a media device detached observer and remove the
+  // media device from the map.
+  void RemoveMediaDevice(const FilePath::StringType& device_id);
+  bool GetMediaDevice(const FilePath::StringType& device_id,
+                      scoped_refptr<MediaDeviceInterfaceImpl>* device);
+
+ private:
+  MediaDeviceMapService();
+  ~MediaDeviceMapService();
+
+  friend struct DefaultSingletonTraits<MediaDeviceMapService>;
+
+  typedef scoped_refptr<MediaDeviceInterfaceImpl> MediaDeviceRefPtr;
+  typedef std::map<FilePath::StringType, MediaDeviceRefPtr> MediaDeviceMap;
+
+  base::Lock media_device_map_lock_;
+
+  // Store a map of attached mtp devices.
+  // Key: Device id.
+  // Value: MtpDeviceInterface.
+  MediaDeviceMap media_device_map_;
+
+  DISALLOW_COPY_AND_ASSIGN(MediaDeviceMapService);
+};
+
+}  // namespace fileapi
+
+#endif  // WEBKIT_FILEAPI_MEDIA_DEVICE_MAP_SERVICE_H_