1/*
2 * Copyright (C) 2012, 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
6 * are met:
7 * 1.  Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2.  Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
15 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
16 * DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
17 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
18 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
19 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
20 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
22 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
23 */
24
25#ifndef MediaStreamAudioDestinationNode_h
26#define MediaStreamAudioDestinationNode_h
27
28#if ENABLE(WEB_AUDIO)
29
30#include "core/platform/audio/AudioBus.h"
31#include "modules/mediastream/MediaStream.h"
32#include "modules/webaudio/AudioBasicInspectorNode.h"
33#include "wtf/OwnPtr.h"
34#include "wtf/PassRefPtr.h"
35
36namespace WebCore {
37
38class AudioContext;
39
40class MediaStreamAudioDestinationNode : public AudioBasicInspectorNode {
41public:
42    static PassRefPtr<MediaStreamAudioDestinationNode> create(AudioContext*, size_t numberOfChannels);
43
44    virtual ~MediaStreamAudioDestinationNode();
45
46    MediaStream* stream() { return m_stream.get(); }
47
48    // AudioNode.
49    virtual void process(size_t framesToProcess);
50    virtual void reset();
51
52    MediaStreamSource* mediaStreamSource();
53
54private:
55    MediaStreamAudioDestinationNode(AudioContext*, size_t numberOfChannels);
56
57    virtual double tailTime() const OVERRIDE { return 0; }
58    virtual double latencyTime() const OVERRIDE { return 0; }
59
60    // As an audio source, we will never propagate silence.
61    virtual bool propagatesSilence() const OVERRIDE { return false; }
62
63    RefPtr<MediaStream> m_stream;
64    RefPtr<MediaStreamSource> m_source;
65    RefPtr<AudioBus> m_mixBus;
66};
67
68} // namespace WebCore
69
70#endif // ENABLE(WEB_AUDIO)
71
72#endif // MediaStreamAudioDestinationNode_h
73