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1 // Copyright 2016 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. | |
4 | |
5 #ifndef CHROME_BROWSER_MEDIA_CAST_REMOTING_CONNECTOR_MESSAGING_H_ | |
6 #define CHROME_BROWSER_MEDIA_CAST_REMOTING_CONNECTOR_MESSAGING_H_ | |
7 | |
8 #include <stdint.h> | |
9 | |
10 #include <string> | |
11 | |
12 #include "base/strings/string_piece.h" | |
13 | |
14 // Utility functions for parsing messages from the Cast Provider to | |
15 // CastRemotingConnector. These have been broken-out into this separate module | |
16 // to allow for efficient building, linking and execution of these routines for | |
17 // fuzzer testing. | |
18 // | |
19 // Note: If any additions/changes are made here, please update | |
20 // cast_remoting_connector_fuzzertest.cc as well! | |
21 class CastRemotingConnectorMessaging { | |
22 public: | |
23 // Returns true if the given |message| from the Cast Provider matches the | |
24 // given |format| and the session ID in the |message| is equal to the | |
25 // |expected_session_id|. | |
26 static bool IsMessageForSession(const std::string& message, | |
27 const char* format, | |
28 unsigned int expected_session_id); | |
29 | |
30 // Scans |message| for |specifier| and extracts the remoting stream ID that | |
31 // follows the specifier. Returns a negative value on error. | |
32 static int32_t GetStreamIdFromStartedMessage(base::StringPiece message, | |
33 base::StringPiece specifier); | |
34 | |
35 // Simple command messages sent from/to the CastRemotingConnector to/from the | |
36 // Media Router Cast Provider to start/stop media remoting to a Cast device. | |
37 // | |
38 // Field separator (for tokenizing parts of messages). | |
39 static const char kMessageFieldSeparator; | |
40 // Message sent by CastRemotingConnector to Cast provider to start remoting. | |
41 // Example: | |
42 // "START_CAST_REMOTING:session=1f" | |
43 static const char kStartRemotingMessageFormat[]; | |
44 // Message sent by CastRemotingConnector to Cast provider to start the | |
45 // remoting RTP stream(s). Example: | |
46 // "START_CAST_REMOTING_STREAMS:session=1f:audio=N:video=Y" | |
47 static const char kStartStreamsMessageFormat[]; | |
48 // Start acknowledgement message sent by Cast provider to | |
49 // CastRemotingConnector once remoting RTP streams have been set up. Examples: | |
50 // "STARTED_CAST_REMOTING_STREAMS:session=1f:audio_stream_id=2e:" | |
51 // "video_stream_id=3d" | |
52 // "STARTED_CAST_REMOTING_STREAMS:session=1f:video_stream_id=b33f" | |
53 static const char kStartedStreamsMessageFormatPartial[]; | |
54 static const char kStartedStreamsMessageAudioIdSpecifier[]; | |
55 static const char kStartedStreamsMessageVideoIdSpecifier[]; | |
56 // Stop message sent by CastRemotingConnector to Cast provider. Example: | |
57 // "STOP_CAST_REMOTING:session=1f" | |
58 static const char kStopRemotingMessageFormat[]; | |
59 // Stop acknowledgement message sent by Cast provider to CastRemotingConnector | |
60 // once remoting is available again after the last session ended. Example: | |
61 // "STOPPED_CAST_REMOTING:session=1f" | |
62 static const char kStoppedMessageFormat[]; | |
63 // Failure message sent by Cast provider to CastRemotingConnector any time | |
64 // there was a fatal error (e.g., the Cast provider failed to set up the RTP | |
65 // streams, or there was some unexpected external event). Example: | |
66 // "FAILED_CAST_REMOTING:session=1f" | |
67 static const char kFailedMessageFormat[]; | |
68 }; | |
69 | |
70 #endif // CHROME_BROWSER_MEDIA_CAST_REMOTING_CONNECTOR_MESSAGING_H_ | |
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