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| 1 // Copyright 2016 The Chromium Authors. All rights reserved. | 1 // Copyright 2016 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #include "modules/webaudio/IIRFilterNode.h" | 5 #include "modules/webaudio/IIRFilterNode.h" |
| 6 | 6 |
| 7 #include "bindings/core/v8/ExceptionMessages.h" | 7 #include "bindings/core/v8/ExceptionMessages.h" |
| 8 #include "bindings/core/v8/ExceptionState.h" | 8 #include "bindings/core/v8/ExceptionState.h" |
| 9 #include "core/dom/ExceptionCode.h" | 9 #include "core/dom/ExceptionCode.h" |
| 10 #include "modules/webaudio/AudioBasicProcessorHandler.h" | 10 #include "modules/webaudio/AudioBasicProcessorHandler.h" |
| 11 #include "modules/webaudio/BaseAudioContext.h" | 11 #include "modules/webaudio/BaseAudioContext.h" |
| 12 #include "modules/webaudio/IIRFilterOptions.h" | 12 #include "modules/webaudio/IIRFilterOptions.h" |
| 13 #include "platform/Histogram.h" | 13 #include "platform/Histogram.h" |
| 14 #include "wtf/PtrUtil.h" | 14 #include "wtf/PtrUtil.h" |
| 15 | 15 |
| 16 namespace blink { | 16 namespace blink { |
| 17 | 17 |
| 18 IIRFilterNode::IIRFilterNode(BaseAudioContext& context, | 18 IIRFilterNode::IIRFilterNode(BaseAudioContext& context, |
| 19 const Vector<double> feedforwardCoef, | 19 const Vector<double> feedforwardCoef, |
| 20 const Vector<double> feedbackCoef) | 20 const Vector<double> feedbackCoef) |
| 21 : AudioNode(context) { | 21 : AudioNode(context) { |
| 22 setHandler(AudioBasicProcessorHandler::create( | 22 setHandler(AudioBasicProcessorHandler::create( |
| 23 AudioHandler::NodeTypeIIRFilter, *this, context.sampleRate(), | 23 AudioHandler::NodeTypeIIRFilter, *this, context.sampleRate(), |
| 24 wrapUnique(new IIRProcessor(context.sampleRate(), 1, feedforwardCoef, | 24 wrapUnique(new IIRProcessor(context.sampleRate(), 1, feedforwardCoef, |
| 25 feedbackCoef)))); | 25 feedbackCoef)))); |
| 26 | 26 |
| 27 // Histogram of the IIRFilter order. createIIRFilter ensures that the length
of |feedbackCoef| | 27 // Histogram of the IIRFilter order. createIIRFilter ensures that the length |
| 28 // is in the range [1, IIRFilter::kMaxOrder + 1]. The order is one less than
the length of this | 28 // of |feedbackCoef| is in the range [1, IIRFilter::kMaxOrder + 1]. The order |
| 29 // vector. | 29 // is one less than the length of this vector. |
| 30 DEFINE_STATIC_LOCAL(SparseHistogram, filterOrderHistogram, | 30 DEFINE_STATIC_LOCAL(SparseHistogram, filterOrderHistogram, |
| 31 ("WebAudio.IIRFilterNode.Order")); | 31 ("WebAudio.IIRFilterNode.Order")); |
| 32 | 32 |
| 33 filterOrderHistogram.sample(feedbackCoef.size() - 1); | 33 filterOrderHistogram.sample(feedbackCoef.size() - 1); |
| 34 } | 34 } |
| 35 | 35 |
| 36 IIRFilterNode* IIRFilterNode::create(BaseAudioContext& context, | 36 IIRFilterNode* IIRFilterNode::create(BaseAudioContext& context, |
| 37 const Vector<double> feedforwardCoef, | 37 const Vector<double> feedforwardCoef, |
| 38 const Vector<double> feedbackCoef, | 38 const Vector<double> feedbackCoef, |
| 39 ExceptionState& exceptionState) { | 39 ExceptionState& exceptionState) { |
| (...skipping 148 matching lines...) Expand 10 before | Expand all | Expand 10 after Loading... |
| 188 frequencyHzLength)); | 188 frequencyHzLength)); |
| 189 return; | 189 return; |
| 190 } | 190 } |
| 191 | 191 |
| 192 iirProcessor()->getFrequencyResponse(frequencyHzLength, frequencyHz->data(), | 192 iirProcessor()->getFrequencyResponse(frequencyHzLength, frequencyHz->data(), |
| 193 magResponse->data(), | 193 magResponse->data(), |
| 194 phaseResponse->data()); | 194 phaseResponse->data()); |
| 195 } | 195 } |
| 196 | 196 |
| 197 } // namespace blink | 197 } // namespace blink |
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