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 | |
30 | namespace WebCore { |
31 | |
32 | class AudioBus; |
33 | class AudioNodeInput; |
34 | class AudioProcessor; |
35 | |
36 | // AudioBasicProcessorNode is an AudioNode with one input and one output where the input and output have the same number of channels. |
37 | class AudioBasicProcessorNode : public AudioNode { |
38 | WTF_MAKE_ISO_ALLOCATED(AudioBasicProcessorNode); |
39 | public: |
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 | |
55 | protected: |
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 | |