1/*
2 * Copyright (C) 2010, 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#include "AudioNode.h"
28#include <wtf/Lock.h>
29
30namespace WebCore {
31
32class AudioBuffer;
33class Reverb;
34
35class ConvolverNode final : public AudioNode {
36 WTF_MAKE_ISO_ALLOCATED(ConvolverNode);
37public:
38 static Ref<ConvolverNode> create(AudioContext& context, float sampleRate)
39 {
40 return adoptRef(*new ConvolverNode(context, sampleRate));
41 }
42
43 virtual ~ConvolverNode();
44
45 ExceptionOr<void> setBuffer(AudioBuffer*);
46 AudioBuffer* buffer();
47
48 bool normalize() const { return m_normalize; }
49 void setNormalize(bool normalize) { m_normalize = normalize; }
50
51private:
52 ConvolverNode(AudioContext&, float sampleRate);
53
54 double tailTime() const final;
55 double latencyTime() const final;
56
57 void process(size_t framesToProcess) final;
58 void reset() final;
59 void initialize() final;
60 void uninitialize() final;
61
62 std::unique_ptr<Reverb> m_reverb;
63 RefPtr<AudioBuffer> m_buffer;
64
65 // This synchronizes dynamic changes to the convolution impulse response with process().
66 mutable Lock m_processMutex;
67
68 // Normalize the impulse response or not.
69 bool m_normalize { true };
70};
71
72} // namespace WebCore
73