media/midi/midi_message_util.cc

   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 #include "media/midi/midi_message_util.h"
   6
   7 namespace media {
   8 namespace midi {
   9
  10 size_t GetMidiMessageLength(uint8 status_byte) {
  11   if (status_byte < 0x80)
  12     return 0;
  13   if (0x80 <= status_byte && status_byte <= 0xbf)
  14     return 3;
  15   if (0xc0 <= status_byte && status_byte <= 0xdf)
  16     return 2;
  17   if (0xe0 <= status_byte && status_byte <= 0xef)
  18     return 3;
  19   if (status_byte == 0xf0)
  20     return 0;
  21   if (status_byte == 0xf1)
  22     return 2;
  23   if (status_byte == 0xf2)
  24     return 3;
  25   if (status_byte == 0xf3)
  26     return 2;
  27   if (0xf4 <= status_byte && status_byte <= 0xf6)
  28     return 1;
  29   if (status_byte == 0xf7)
  30     return 0;
  31   // 0xf8 <= status_byte && status_byte <= 0xff
  32   return 1;
  33 }
  34
  35 }  // namespace midi
  36 }  // namespace media