1/*
2 * Copyright (C) 2013 Google Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are
6 * met:
7 *
8 *     * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 *     * Redistributions in binary form must reproduce the above
11 * copyright notice, this list of conditions and the following disclaimer
12 * in the documentation and/or other materials provided with the
13 * distribution.
14 *     * Neither the name of Google Inc. nor the names of its
15 * contributors may be used to endorse or promote products derived from
16 * this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31#ifndef MIDIAccessor_h
32#define MIDIAccessor_h
33
34#include "public/platform/WebMIDIAccessor.h"
35#include "public/platform/WebMIDIAccessorClient.h"
36#include "wtf/OwnPtr.h"
37#include "wtf/PassOwnPtr.h"
38
39namespace blink {
40
41class MIDIAccessorClient;
42
43class MIDIAccessor FINAL : public WebMIDIAccessorClient {
44public:
45    static PassOwnPtr<MIDIAccessor> create(MIDIAccessorClient*);
46
47    virtual ~MIDIAccessor() { }
48
49    void startSession();
50    void sendMIDIData(unsigned portIndex, const unsigned char* data, size_t length, double timeStamp);
51    // MIDIAccessInitializer and MIDIAccess are both MIDIAccessClient.
52    // MIDIAccessInitializer is the first client and MIDIAccess takes over it
53    // once the initialization successfully finishes.
54    void setClient(MIDIAccessorClient* client) { m_client = client; }
55
56    // WebMIDIAccessorClient
57    virtual void didAddInputPort(const WebString& id, const WebString& manufacturer, const WebString& name, const WebString& version) OVERRIDE;
58    virtual void didAddOutputPort(const WebString& id, const WebString& manufacturer, const WebString& name, const WebString& version) OVERRIDE;
59    virtual void didStartSession(bool success, const WebString& error, const WebString& message) OVERRIDE;
60    virtual void didReceiveMIDIData(unsigned portIndex, const unsigned char* data, size_t length, double timeStamp) OVERRIDE;
61
62private:
63    explicit MIDIAccessor(MIDIAccessorClient*);
64
65    MIDIAccessorClient* m_client;
66    OwnPtr<WebMIDIAccessor> m_accessor;
67};
68
69} // namespace blink
70
71#endif // MIDIAccessor_h
72