media/midi/midi_message_util.cc

// Copyright 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "base/logging.h"
#include "media/midi/midi_message_util.h"

namespace media {
namespace midi {

size_t GetMidiMessageLength(uint8_t status_byte) {
  if (status_byte < 0x80)
    return 0;
  if (0x80 <= status_byte && status_byte <= 0xbf)
    return 3;
  if (0xc0 <= status_byte && status_byte <= 0xdf)
    return 2;
  if (0xe0 <= status_byte && status_byte <= 0xef)
    return 3;

  switch (status_byte) {
    case 0xf0:
      return 0;
    case 0xf1:
      return 2;
    case 0xf2:
      return 3;
    case 0xf3:
      return 2;
    case 0xf4:  // Reserved
    case 0xf5:  // Reserved
      return 0;
    case 0xf6:
      return 1;
    case 0xf7:
      return 0;
    case 0xf8:
    case 0xf9:
    case 0xfa:
    case 0xfb:
    case 0xfc:
    case 0xfd:
    case 0xfe:
    case 0xff:
      return 1;
    default:
      NOTREACHED();
      return 0;
  }
}

}  // namespace midi
}  // namespace media