1// Copyright (c) 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_MANAGER_MAC_H_
6#define MEDIA_MIDI_MIDI_MANAGER_MAC_H_
7
8#include <CoreMIDI/MIDIServices.h>
9#include <map>
10#include <string>
11#include <vector>
12
13#include "base/basictypes.h"
14#include "base/compiler_specific.h"
15#include "base/threading/thread.h"
16#include "media/midi/midi_manager.h"
17#include "media/midi/midi_port_info.h"
18
19namespace media {
20
21class MEDIA_EXPORT MidiManagerMac : public MidiManager {
22 public:
23  MidiManagerMac();
24  virtual ~MidiManagerMac();
25
26  // MidiManager implementation.
27  virtual void StartInitialization() OVERRIDE;
28  virtual void DispatchSendMidiData(MidiManagerClient* client,
29                                    uint32 port_index,
30                                    const std::vector<uint8>& data,
31                                    double timestamp) OVERRIDE;
32
33 private:
34  // CoreMIDI callback for MIDI data.
35  // Each callback can contain multiple packets, each of which can contain
36  // multiple MIDI messages.
37  static void ReadMidiDispatch(
38      const MIDIPacketList *pktlist,
39      void *read_proc_refcon,
40      void *src_conn_refcon);
41  virtual void ReadMidi(MIDIEndpointRef source, const MIDIPacketList *pktlist);
42
43  // An internal callback that runs on MidiSendThread.
44  void SendMidiData(MidiManagerClient* client,
45                    uint32 port_index,
46                    const std::vector<uint8>& data,
47                    double timestamp);
48
49  // Helper
50  static media::MidiPortInfo GetPortInfoFromEndpoint(MIDIEndpointRef endpoint);
51  static double MIDITimeStampToSeconds(MIDITimeStamp timestamp);
52  static MIDITimeStamp SecondsToMIDITimeStamp(double seconds);
53
54  // CoreMIDI
55  MIDIClientRef midi_client_;
56  MIDIPortRef coremidi_input_;
57  MIDIPortRef coremidi_output_;
58
59  enum{ kMaxPacketListSize = 512 };
60  char midi_buffer_[kMaxPacketListSize];
61  MIDIPacketList* packet_list_;
62  MIDIPacket* midi_packet_;
63
64  typedef std::map<MIDIEndpointRef, uint32> SourceMap;
65
66  // Keeps track of the index (0-based) for each of our sources.
67  SourceMap source_map_;
68
69  // Keeps track of all destinations.
70  std::vector<MIDIEndpointRef> destinations_;
71
72  // |send_thread_| is used to send MIDI data.
73  base::Thread send_thread_;
74
75  DISALLOW_COPY_AND_ASSIGN(MidiManagerMac);
76};
77
78}  // namespace media
79
80#endif  // MEDIA_MIDI_MIDI_MANAGER_MAC_H_
81