1// Copyright 2014 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_USB_MIDI_JACK_H_
6#define MEDIA_MIDI_USB_MIDI_JACK_H_
7
8#include "base/basictypes.h"
9#include "media/base/media_export.h"
10
11namespace media {
12
13class UsbMidiDevice;
14
15// UsbMidiJack represents an EMBEDDED MIDI jack.
16struct MEDIA_EXPORT UsbMidiJack {
17  // The direction of the endpoint associated with an EMBEDDED MIDI jack.
18  // Note that an IN MIDI jack associated with an OUT endpoint has
19  // ***DIRECTION_OUT*** direction.
20  enum Direction {
21    DIRECTION_IN,
22    DIRECTION_OUT,
23  };
24  UsbMidiJack(UsbMidiDevice* device,
25              uint8 jack_id,
26              uint8 cable_number,
27              uint8 endpoint_address)
28      : device(device),
29        jack_id(jack_id),
30        cable_number(cable_number),
31        endpoint_address(endpoint_address) {}
32  // Not owned
33  UsbMidiDevice* device;
34  // The id of this jack unique in the interface.
35  uint8 jack_id;
36  // The cable number of this jack in the associated endpoint.
37  uint8 cable_number;
38  // The address of the endpoint that this jack is associated with.
39  uint8 endpoint_address;
40
41  Direction direction() const {
42    return (endpoint_address & 0x80) ? DIRECTION_IN : DIRECTION_OUT;
43  }
44  uint8 endpoint_number() const {
45    return (endpoint_address & 0xf);
46  }
47};
48
49}  // namespace media
50
51#endif  // MEDIA_MIDI_USB_MIDI_JACK_H_
52