1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
|
/*
* Copyright (C) 2010, Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#if ENABLE(WEB_AUDIO)
#include "modules/webaudio/AnalyserNode.h"
#include "bindings/v8/ExceptionMessages.h"
#include "bindings/v8/ExceptionState.h"
#include "core/dom/ExceptionCode.h"
#include "modules/webaudio/AudioNodeInput.h"
#include "modules/webaudio/AudioNodeOutput.h"
namespace WebCore {
AnalyserNode::AnalyserNode(AudioContext* context, float sampleRate)
: AudioBasicInspectorNode(context, sampleRate, 2)
{
ScriptWrappable::init(this);
setNodeType(NodeTypeAnalyser);
initialize();
}
AnalyserNode::~AnalyserNode()
{
uninitialize();
}
void AnalyserNode::process(size_t framesToProcess)
{
AudioBus* outputBus = output(0)->bus();
if (!isInitialized() || !input(0)->isConnected()) {
outputBus->zero();
return;
}
AudioBus* inputBus = input(0)->bus();
// Give the analyser the audio which is passing through this AudioNode.
m_analyser.writeInput(inputBus, framesToProcess);
// For in-place processing, our override of pullInputs() will just pass the audio data through unchanged if the channel count matches from input to output
// (resulting in inputBus == outputBus). Otherwise, do an up-mix to stereo.
if (inputBus != outputBus)
outputBus->copyFrom(*inputBus);
}
void AnalyserNode::reset()
{
m_analyser.reset();
}
void AnalyserNode::setFftSize(unsigned size, ExceptionState& exceptionState)
{
if (!m_analyser.setFftSize(size)) {
exceptionState.throwDOMException(
IndexSizeError,
ExceptionMessages::failedToSet(
"fftSize",
"AnalyserNode",
"FFT size (" + String::number(size)
+ ") must be a power of two between "
+ String::number(RealtimeAnalyser::MinFFTSize) + " and "
+ String::number(RealtimeAnalyser::MaxFFTSize) + ", inclusive"));
}
}
void AnalyserNode::setMinDecibels(float k, ExceptionState& exceptionState)
{
if (k <= maxDecibels()) {
m_analyser.setMinDecibels(k);
} else {
exceptionState.throwDOMException(
IndexSizeError,
ExceptionMessages::failedToSet(
"minDecibels",
"AnalyserNode",
"minDecibels (" + String::number(k)
+ ") must be less than or equal maxDecibels (" + String::number(maxDecibels())
+ ")."));
}
}
void AnalyserNode::setMaxDecibels(float k, ExceptionState& exceptionState)
{
if (k >= minDecibels()) {
m_analyser.setMaxDecibels(k);
} else {
exceptionState.throwDOMException(
IndexSizeError,
ExceptionMessages::failedToSet(
"maxDecibels",
"AnalyserNode",
"maxDecibels (" + String::number(k)
+ ") must be greater than or equal minDecibels (" + String::number(minDecibels())
+ ")."));
}
}
void AnalyserNode::setSmoothingTimeConstant(float k, ExceptionState& exceptionState)
{
if (k >= 0 && k <= 1) {
m_analyser.setSmoothingTimeConstant(k);
} else {
exceptionState.throwDOMException(
IndexSizeError,
ExceptionMessages::failedToSet(
"smoothingTimeConstant",
"AnalyserNode",
"smoothing value (" + String::number(k)
+ ") must be between 0 and 1, inclusive."));
}
}
} // namespace WebCore
#endif // ENABLE(WEB_AUDIO)
|
