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 <memory>
29
30namespace WebCore {
31
32class AudioBus;
33class AudioNodeInput;
34class AudioProcessor;
35
36// AudioBasicProcessorNode is an AudioNode with one input and one output where the input and output have the same number of channels.
37class AudioBasicProcessorNode : public AudioNode {
38 WTF_MAKE_ISO_ALLOCATED(AudioBasicProcessorNode);
39public:
40 AudioBasicProcessorNode(AudioContext&, float sampleRate);
41
42 // AudioNode
43 void process(size_t framesToProcess) override;
44 void pullInputs(size_t framesToProcess) override;
45 void reset() override;
46 void initialize() override;
47 void uninitialize() override;
48
49 // Called in the main thread when the number of channels for the input may have changed.
50 void checkNumberOfChannelsForInput(AudioNodeInput*) override;
51
52 // Returns the number of channels for both the input and the output.
53 unsigned numberOfChannels();
54
55protected:
56 double tailTime() const override;
57 double latencyTime() const override;
58
59 AudioProcessor* processor() { return m_processor.get(); }
60 std::unique_ptr<AudioProcessor> m_processor;
61};
62
63} // namespace WebCore
64