Media Galleries API: Audio/Video attached pictures support.

chrome/browser/media_galleries/fileapi/safe_media_metadata_parser.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 CHROME_BROWSER_MEDIA_GALLERIES_FILEAPI_SAFE_MEDIA_METADATA_PARSER_H_
 #define CHROME_BROWSER_MEDIA_GALLERIES_FILEAPI_SAFE_MEDIA_METADATA_PARSER_H_
 
+#include <string>
+#include <vector>
+
 #include "base/callback.h"
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "chrome/common/extensions/api/media_galleries.h"
 #include "content/public/browser/utility_process_host.h"
 #include "content/public/browser/utility_process_host_client.h"
 
 namespace IPC {
 class Message;
 }
 
 class Profile;
 
 namespace metadata {
 
 // Parses the media metadata of a Blob safely in a utility process. This class
 // expects the MIME type of the Blob to be already determined. It spawns a
 // utility process to do further MIME-type specific metadata extraction.
 // All public methods and callbacks of this class run on the UI thread.
 class SafeMediaMetadataParser : public content::UtilityProcessHostClient {
  public:
   // |metadata_dictionary| is owned by the callback.
   typedef base::Callback<
-      void(bool parse_success, base::DictionaryValue* metadata_dictionary)>
+      void(bool parse_success, base::DictionaryValue* metadata_dictionary,
+           const std::vector<std::string>& attached_pictures_bytes,
+           const std::vector<std::string>& attached_pictures_types)>
       DoneCallback;
 
   SafeMediaMetadataParser(Profile* profile, const std::string& blob_uuid,
-                          int64 blob_size, const std::string& mime_type);
+                          int64 blob_size, const std::string& mime_type,
+                          bool get_attached_pictures);
 
   // Should be called on the UI thread. |callback| also runs on the UI thread.
   void Start(const DoneCallback& callback);
 
  private:
   enum ParserState {
     INITIAL_STATE,
     STARTED_PARSING_STATE,
     FINISHED_PARSING_STATE,
   };
 
   // Private because content::UtilityProcessHostClient is ref-counted.
   virtual ~SafeMediaMetadataParser();
 
   // Launches the utility process.  Must run on the IO thread.
   void StartWorkOnIOThread(const DoneCallback& callback);
 
   // Notification from the utility process when it finishes parsing metadata.
   // Runs on the IO thread.
   void OnParseMediaMetadataFinished(
-      bool parse_success,
-      const base::DictionaryValue& metadata_dictionary);
+      bool parse_success, const base::DictionaryValue& metadata_dictionary,
+      const std::vector<std::string>& attached_pictures_bytes,
+      const std::vector<std::string>& attached_pictures_types);
 
   // Sequence of functions that bounces from the IO thread to the UI thread to
   // read the blob data, then sends the data back to the utility process.
   void OnUtilityProcessRequestBlobBytes(int64 request_id, int64 byte_start,
                                         int64 length);
   void StartBlobReaderOnUIThread(int64 request_id, int64 byte_start,
                                  int64 length);
   void OnBlobReaderDoneOnUIThread(int64 request_id,
                                   scoped_ptr<std::string> data,
                                   int64 /* blob_total_size */);
   void FinishRequestBlobBytes(int64 request_id, scoped_ptr<std::string> data);
 
   // UtilityProcessHostClient implementation.
   // Runs on the IO thread.
   virtual void OnProcessCrashed(int exit_code) OVERRIDE;
   virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
 
   // All member variables are only accessed on the IO thread.
   Profile* const profile_;
   const std::string blob_uuid_;
   const int64 blob_size_;
   const std::string mime_type_;
+  bool get_attached_pictures_;
 
   DoneCallback callback_;
 
   base::WeakPtr<content::UtilityProcessHost> utility_process_host_;
 
   // Verifies the messages from the utility process came at the right time.
   // Initialized on the UI thread, but only accessed on the IO thread.
   ParserState parser_state_;
 
   DISALLOW_COPY_AND_ASSIGN(SafeMediaMetadataParser);
 };
 
 }  // namespace metadata
 
 #endif  // CHROME_BROWSER_MEDIA_GALLERIES_FILEAPI_SAFE_MEDIA_METADATA_PARSER_H_