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1 /* | 1 /* |
2 * Copyright (C) 2010, Google Inc. All rights reserved. | 2 * Copyright (C) 2010, Google Inc. All rights reserved. |
3 * | 3 * |
4 * Redistribution and use in source and binary forms, with or without | 4 * Redistribution and use in source and binary forms, with or without |
5 * modification, are permitted provided that the following conditions | 5 * modification, are permitted provided that the following conditions |
6 * are met: | 6 * are met: |
7 * 1. Redistributions of source code must retain the above copyright | 7 * 1. Redistributions of source code must retain the above copyright |
8 * notice, this list of conditions and the following disclaimer. | 8 * notice, this list of conditions and the following disclaimer. |
9 * 2. Redistributions in binary form must reproduce the above copyright | 9 * 2. Redistributions in binary form must reproduce the above copyright |
10 * notice, this list of conditions and the following disclaimer in the | 10 * notice, this list of conditions and the following disclaimer in the |
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49 size_t bufferSize = 1 << static_cast<unsigned>(log2(4 * hardwareBufferSize)
+ 0.5); | 49 size_t bufferSize = 1 << static_cast<unsigned>(log2(4 * hardwareBufferSize)
+ 0.5); |
50 | 50 |
51 if (bufferSize < 256) | 51 if (bufferSize < 256) |
52 return 256; | 52 return 256; |
53 if (bufferSize > 16384) | 53 if (bufferSize > 16384) |
54 return 16384; | 54 return 16384; |
55 | 55 |
56 return bufferSize; | 56 return bufferSize; |
57 } | 57 } |
58 | 58 |
59 PassRefPtr<ScriptProcessorNode> ScriptProcessorNode::create(AudioContext* contex
t, float sampleRate, size_t bufferSize, unsigned numberOfInputChannels, unsigned
numberOfOutputChannels) | 59 PassRefPtrWillBeRawPtr<ScriptProcessorNode> ScriptProcessorNode::create(AudioCon
text* context, float sampleRate, size_t bufferSize, unsigned numberOfInputChanne
ls, unsigned numberOfOutputChannels) |
60 { | 60 { |
61 // Check for valid buffer size. | 61 // Check for valid buffer size. |
62 switch (bufferSize) { | 62 switch (bufferSize) { |
63 case 0: | 63 case 0: |
64 bufferSize = chooseBufferSize(); | 64 bufferSize = chooseBufferSize(); |
65 break; | 65 break; |
66 case 256: | 66 case 256: |
67 case 512: | 67 case 512: |
68 case 1024: | 68 case 1024: |
69 case 2048: | 69 case 2048: |
70 case 4096: | 70 case 4096: |
71 case 8192: | 71 case 8192: |
72 case 16384: | 72 case 16384: |
73 break; | 73 break; |
74 default: | 74 default: |
75 return nullptr; | 75 return nullptr; |
76 } | 76 } |
77 | 77 |
78 if (!numberOfInputChannels && !numberOfOutputChannels) | 78 if (!numberOfInputChannels && !numberOfOutputChannels) |
79 return nullptr; | 79 return nullptr; |
80 | 80 |
81 if (numberOfInputChannels > AudioContext::maxNumberOfChannels()) | 81 if (numberOfInputChannels > AudioContext::maxNumberOfChannels()) |
82 return nullptr; | 82 return nullptr; |
83 | 83 |
84 if (numberOfOutputChannels > AudioContext::maxNumberOfChannels()) | 84 if (numberOfOutputChannels > AudioContext::maxNumberOfChannels()) |
85 return nullptr; | 85 return nullptr; |
86 | 86 |
87 return adoptRef(new ScriptProcessorNode(context, sampleRate, bufferSize, num
berOfInputChannels, numberOfOutputChannels)); | 87 return adoptRefWillBeNoop(new ScriptProcessorNode(context, sampleRate, buffe
rSize, numberOfInputChannels, numberOfOutputChannels)); |
88 } | 88 } |
89 | 89 |
90 ScriptProcessorNode::ScriptProcessorNode(AudioContext* context, float sampleRate
, size_t bufferSize, unsigned numberOfInputChannels, unsigned numberOfOutputChan
nels) | 90 ScriptProcessorNode::ScriptProcessorNode(AudioContext* context, float sampleRate
, size_t bufferSize, unsigned numberOfInputChannels, unsigned numberOfOutputChan
nels) |
91 : AudioNode(context, sampleRate) | 91 : AudioNode(context, sampleRate) |
92 , m_doubleBufferIndex(0) | 92 , m_doubleBufferIndex(0) |
93 , m_doubleBufferIndexForEvent(0) | 93 , m_doubleBufferIndexForEvent(0) |
94 , m_bufferSize(bufferSize) | 94 , m_bufferSize(bufferSize) |
95 , m_bufferReadWriteIndex(0) | 95 , m_bufferReadWriteIndex(0) |
96 , m_numberOfInputChannels(numberOfInputChannels) | 96 , m_numberOfInputChannels(numberOfInputChannels) |
97 , m_numberOfOutputChannels(numberOfOutputChannels) | 97 , m_numberOfOutputChannels(numberOfOutputChannels) |
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120 void ScriptProcessorNode::initialize() | 120 void ScriptProcessorNode::initialize() |
121 { | 121 { |
122 if (isInitialized()) | 122 if (isInitialized()) |
123 return; | 123 return; |
124 | 124 |
125 float sampleRate = context()->sampleRate(); | 125 float sampleRate = context()->sampleRate(); |
126 | 126 |
127 // Create double buffers on both the input and output sides. | 127 // Create double buffers on both the input and output sides. |
128 // These AudioBuffers will be directly accessed in the main thread by JavaSc
ript. | 128 // These AudioBuffers will be directly accessed in the main thread by JavaSc
ript. |
129 for (unsigned i = 0; i < 2; ++i) { | 129 for (unsigned i = 0; i < 2; ++i) { |
130 RefPtr<AudioBuffer> inputBuffer = m_numberOfInputChannels ? AudioBuffer:
:create(m_numberOfInputChannels, bufferSize(), sampleRate) : nullptr; | 130 RefPtrWillBeRawPtr<AudioBuffer> inputBuffer = m_numberOfInputChannels ?
AudioBuffer::create(m_numberOfInputChannels, bufferSize(), sampleRate) : nullptr
; |
131 RefPtr<AudioBuffer> outputBuffer = m_numberOfOutputChannels ? AudioBuffe
r::create(m_numberOfOutputChannels, bufferSize(), sampleRate) : nullptr; | 131 RefPtrWillBeRawPtr<AudioBuffer> outputBuffer = m_numberOfOutputChannels
? AudioBuffer::create(m_numberOfOutputChannels, bufferSize(), sampleRate) : null
ptr; |
132 | 132 |
133 m_inputBuffers.append(inputBuffer); | 133 m_inputBuffers.append(inputBuffer); |
134 m_outputBuffers.append(outputBuffer); | 134 m_outputBuffers.append(outputBuffer); |
135 } | 135 } |
136 | 136 |
137 AudioNode::initialize(); | 137 AudioNode::initialize(); |
138 } | 138 } |
139 | 139 |
140 void ScriptProcessorNode::uninitialize() | 140 void ScriptProcessorNode::uninitialize() |
141 { | 141 { |
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277 double ScriptProcessorNode::tailTime() const | 277 double ScriptProcessorNode::tailTime() const |
278 { | 278 { |
279 return std::numeric_limits<double>::infinity(); | 279 return std::numeric_limits<double>::infinity(); |
280 } | 280 } |
281 | 281 |
282 double ScriptProcessorNode::latencyTime() const | 282 double ScriptProcessorNode::latencyTime() const |
283 { | 283 { |
284 return std::numeric_limits<double>::infinity(); | 284 return std::numeric_limits<double>::infinity(); |
285 } | 285 } |
286 | 286 |
| 287 void ScriptProcessorNode::trace(Visitor* visitor) |
| 288 { |
| 289 visitor->trace(m_inputBuffers); |
| 290 visitor->trace(m_outputBuffers); |
| 291 AudioNode::trace(visitor); |
| 292 } |
| 293 |
287 } // namespace WebCore | 294 } // namespace WebCore |
288 | 295 |
289 #endif // ENABLE(WEB_AUDIO) | 296 #endif // ENABLE(WEB_AUDIO) |
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