[Media Router] Add integration tests and e2e tests for media router and presentation...
[chromium-blink-merge.git] / chrome / browser / media_galleries / fileapi / safe_media_metadata_parser.h
blobac18b80bb8045ddb5f3f90431a1d9e1f2639aa65
1 // Copyright 2014 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
5 #ifndef CHROME_BROWSER_MEDIA_GALLERIES_FILEAPI_SAFE_MEDIA_METADATA_PARSER_H_
6 #define CHROME_BROWSER_MEDIA_GALLERIES_FILEAPI_SAFE_MEDIA_METADATA_PARSER_H_
8 #include <string>
9 #include <vector>
11 #include "base/callback.h"
12 #include "base/compiler_specific.h"
13 #include "base/memory/scoped_ptr.h"
14 #include "base/memory/weak_ptr.h"
15 #include "chrome/common/extensions/api/media_galleries.h"
16 #include "chrome/common/media_galleries/metadata_types.h"
17 #include "content/public/browser/utility_process_host.h"
18 #include "content/public/browser/utility_process_host_client.h"
20 namespace IPC {
21 class Message;
24 class Profile;
26 namespace metadata {
28 // Parses the media metadata of a Blob safely in a utility process. This class
29 // expects the MIME type of the Blob to be already determined. It spawns a
30 // utility process to do further MIME-type specific metadata extraction.
31 // All public methods and callbacks of this class run on the UI thread.
32 class SafeMediaMetadataParser : public content::UtilityProcessHostClient {
33 public:
34 // |metadata_dictionary| is owned by the callback.
35 typedef base::Callback<
36 void(bool parse_success,
37 scoped_ptr<base::DictionaryValue> metadata_dictionary,
38 scoped_ptr<std::vector<AttachedImage> > attached_images)>
39 DoneCallback;
41 SafeMediaMetadataParser(Profile* profile, const std::string& blob_uuid,
42 int64 blob_size, const std::string& mime_type,
43 bool get_attached_images);
45 // Should be called on the UI thread. |callback| also runs on the UI thread.
46 void Start(const DoneCallback& callback);
48 private:
49 enum ParserState {
50 INITIAL_STATE,
51 STARTED_PARSING_STATE,
52 FINISHED_PARSING_STATE,
55 // Private because content::UtilityProcessHostClient is ref-counted.
56 ~SafeMediaMetadataParser() override;
58 // Launches the utility process. Must run on the IO thread.
59 void StartWorkOnIOThread(const DoneCallback& callback);
61 // Notification from the utility process when it finishes parsing metadata.
62 // Runs on the IO thread.
63 void OnParseMediaMetadataFinished(
64 bool parse_success, const base::DictionaryValue& metadata_dictionary,
65 const std::vector<AttachedImage>& attached_images);
67 // Sequence of functions that bounces from the IO thread to the UI thread to
68 // read the blob data, then sends the data back to the utility process.
69 void OnUtilityProcessRequestBlobBytes(int64 request_id, int64 byte_start,
70 int64 length);
71 void StartBlobReaderOnUIThread(int64 request_id, int64 byte_start,
72 int64 length);
73 void OnBlobReaderDoneOnUIThread(int64 request_id,
74 scoped_ptr<std::string> data,
75 int64 /* blob_total_size */);
76 void FinishRequestBlobBytes(int64 request_id, scoped_ptr<std::string> data);
78 // UtilityProcessHostClient implementation.
79 // Runs on the IO thread.
80 void OnProcessCrashed(int exit_code) override;
81 bool OnMessageReceived(const IPC::Message& message) override;
83 // All member variables are only accessed on the IO thread.
84 Profile* const profile_;
85 const std::string blob_uuid_;
86 const int64 blob_size_;
87 const std::string mime_type_;
88 bool get_attached_images_;
90 DoneCallback callback_;
92 base::WeakPtr<content::UtilityProcessHost> utility_process_host_;
94 // Verifies the messages from the utility process came at the right time.
95 // Initialized on the UI thread, but only accessed on the IO thread.
96 ParserState parser_state_;
98 DISALLOW_COPY_AND_ASSIGN(SafeMediaMetadataParser);
101 } // namespace metadata
103 #endif // CHROME_BROWSER_MEDIA_GALLERIES_FILEAPI_SAFE_MEDIA_METADATA_PARSER_H_