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1 // Copyright 2013 The Chromium Authors. All rights reserved. | 1 // Copyright 2013 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef MEDIA_MIDI_MIDI_MESSAGE_UTIL_H_ | 5 #ifndef MEDIA_MIDI_MIDI_MESSAGE_UTIL_H_ |
6 #define MEDIA_MIDI_MIDI_MESSAGE_UTIL_H_ | 6 #define MEDIA_MIDI_MIDI_MESSAGE_UTIL_H_ |
7 | 7 |
8 #include <deque> | 8 #include <deque> |
9 #include <vector> | 9 #include <vector> |
10 | 10 |
11 #include "base/basictypes.h" | 11 #include "base/basictypes.h" |
12 #include "media/base/media_export.h" | 12 #include "media/midi/midi_export.h" |
13 | 13 |
14 namespace media { | 14 namespace media { |
15 | 15 |
16 // Returns the length of a MIDI message in bytes. Never returns 4 or greater. | 16 // Returns the length of a MIDI message in bytes. Never returns 4 or greater. |
17 // Returns 0 if |status_byte| is: | 17 // Returns 0 if |status_byte| is: |
18 // - not a valid status byte, namely data byte. | 18 // - not a valid status byte, namely data byte. |
19 // - the MIDI System Exclusive message. | 19 // - the MIDI System Exclusive message. |
20 // - the End of System Exclusive message. | 20 // - the End of System Exclusive message. |
21 MEDIA_EXPORT size_t GetMidiMessageLength(uint8 status_byte); | 21 MIDI_EXPORT size_t GetMidiMessageLength(uint8 status_byte); |
22 | 22 |
23 const uint8 kSysExByte = 0xf0; | 23 const uint8 kSysExByte = 0xf0; |
24 const uint8 kEndOfSysExByte = 0xf7; | 24 const uint8 kEndOfSysExByte = 0xf7; |
25 | 25 |
26 const uint8 kSysMessageBitMask = 0xf0; | 26 const uint8 kSysMessageBitMask = 0xf0; |
27 const uint8 kSysMessageBitPattern = 0xf0; | 27 const uint8 kSysMessageBitPattern = 0xf0; |
28 const uint8 kSysRTMessageBitMask = 0xf8; | 28 const uint8 kSysRTMessageBitMask = 0xf8; |
29 const uint8 kSysRTMessageBitPattern = 0xf8; | 29 const uint8 kSysRTMessageBitPattern = 0xf8; |
30 | 30 |
31 } // namespace media | 31 } // namespace media |
32 | 32 |
33 #endif // MEDIA_MIDI_MIDI_MESSAGE_UTIL_H_ | 33 #endif // MEDIA_MIDI_MIDI_MESSAGE_UTIL_H_ |
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