1/*
2 * Copyright (C) 2012, Intel Corporation. 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
29namespace WebCore {
30
31// AudioBasicInspectorNode is an AudioNode with one input and one output where the output might not necessarily connect to another node's input.
32// If the output is not connected to any other node, then the AudioBasicInspectorNode's processIfNecessary() function will be called automatically by
33// AudioContext before the end of each render quantum so that it can inspect the audio stream.
34class AudioBasicInspectorNode : public AudioNode {
35 WTF_MAKE_ISO_ALLOCATED(AudioBasicInspectorNode);
36public:
37 AudioBasicInspectorNode(AudioContext&, float sampleRate, unsigned outputChannelCount);
38
39private:
40 void pullInputs(size_t framesToProcess) override;
41 ExceptionOr<void> connect(AudioNode&, unsigned outputIndex, unsigned inputIndex) override;
42 ExceptionOr<void> disconnect(unsigned outputIndex) override;
43 void checkNumberOfChannelsForInput(AudioNodeInput*) override;
44
45 void updatePullStatus();
46
47 bool m_needAutomaticPull { false }; // When setting to true, AudioBasicInspectorNode will be pulled automatically by AudioContext before the end of each render quantum.
48};
49
50} // namespace WebCore
51