media/midi/midi_message_util.h

   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
   3 // found in the LICENSE file.
   4
   5 #ifndef MEDIA_MIDI_MIDI_MESSAGE_UTIL_H_
   6 #define MEDIA_MIDI_MIDI_MESSAGE_UTIL_H_
   7
   8 #include <deque>
   9 #include <vector>
  10
  11 #include "base/basictypes.h"
  12 #include "media/midi/midi_export.h"
  13
  14 namespace media {
  15 namespace midi {
  16
  17 // Returns the length of a MIDI message in bytes. Never returns 4 or greater.
  18 // Returns 0 if |status_byte| is:
  19 // - not a valid status byte, namely data byte.
  20 // - the MIDI System Exclusive message.
  21 // - the End of System Exclusive message.
  22 MIDI_EXPORT size_t GetMidiMessageLength(uint8 status_byte);
  23
  24 const uint8 kSysExByte = 0xf0;
  25 const uint8 kEndOfSysExByte = 0xf7;
  26
  27 const uint8 kSysMessageBitMask = 0xf0;
  28 const uint8 kSysMessageBitPattern = 0xf0;
  29 const uint8 kSysRTMessageBitMask = 0xf8;
  30 const uint8 kSysRTMessageBitPattern = 0xf8;
  31
  32 }  // namespace midi
  33 }  // namespace media
  34
  35 #endif  // MEDIA_MIDI_MIDI_MESSAGE_UTIL_H_