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#pragma once
26
27#if ENABLE(WEB_AUDIO) && ENABLE(MEDIA_STREAM)
28
29#include "AudioBasicInspectorNode.h"
30#include "AudioBus.h"
31#include "MediaStream.h"
32
33namespace WebCore {
34
35class AudioContext;
36class MediaStreamAudioSource;
37
38class MediaStreamAudioDestinationNode final : public AudioBasicInspectorNode {
39 WTF_MAKE_ISO_ALLOCATED(MediaStreamAudioDestinationNode);
40public:
41 static Ref<MediaStreamAudioDestinationNode> create(AudioContext&, size_t numberOfChannels);
42
43 virtual ~MediaStreamAudioDestinationNode();
44
45 MediaStream& stream() { return m_stream.get(); }
46
47 // AudioNode.
48 void process(size_t framesToProcess) final;
49 void reset() final;
50
51private:
52 MediaStreamAudioDestinationNode(AudioContext&, size_t numberOfChannels);
53
54 double tailTime() const final { return 0; }
55 double latencyTime() const final { return 0; }
56
57 // As an audio source, we will never propagate silence.
58 bool propagatesSilence() const final { return false; }
59
60 Ref<MediaStreamAudioSource> m_source;
61 Ref<MediaStream> m_stream;
62};
63
64} // namespace WebCore
65
66#endif // ENABLE(WEB_AUDIO) && ENABLE(MEDIA_STREAM)
67