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 "AudioBasicInspectorNode.h"
28#include "RealtimeAnalyser.h"
29
30namespace WebCore {
31
32class AnalyserNode final : public AudioBasicInspectorNode {
33 WTF_MAKE_ISO_ALLOCATED(AnalyserNode);
34public:
35 static Ref<AnalyserNode> create(AudioContext& context, float sampleRate)
36 {
37 return adoptRef(*new AnalyserNode(context, sampleRate));
38 }
39
40 virtual ~AnalyserNode();
41
42 unsigned fftSize() const { return m_analyser.fftSize(); }
43 ExceptionOr<void> setFftSize(unsigned);
44
45 unsigned frequencyBinCount() const { return m_analyser.frequencyBinCount(); }
46
47 ExceptionOr<void> setMinDecibels(double);
48 double minDecibels() const { return m_analyser.minDecibels(); }
49
50 ExceptionOr<void> setMaxDecibels(double);
51 double maxDecibels() const { return m_analyser.maxDecibels(); }
52
53 ExceptionOr<void> setSmoothingTimeConstant(double);
54 double smoothingTimeConstant() const { return m_analyser.smoothingTimeConstant(); }
55
56 void getFloatFrequencyData(const RefPtr<JSC::Float32Array>& array) { m_analyser.getFloatFrequencyData(array.get()); }
57 void getByteFrequencyData(const RefPtr<JSC::Uint8Array>& array) { m_analyser.getByteFrequencyData(array.get()); }
58 void getByteTimeDomainData(const RefPtr<JSC::Uint8Array>& array) { m_analyser.getByteTimeDomainData(array.get()); }
59
60private:
61 AnalyserNode(AudioContext&, float sampleRate);
62
63 void process(size_t framesToProcess) final;
64 void reset() final;
65
66 double tailTime() const final { return 0; }
67 double latencyTime() const final { return 0; }
68
69 RealtimeAnalyser m_analyser;
70};
71
72} // namespace WebCore
73