| /* |
| * 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. |
| */ |
| |
| #ifndef THIRD_PARTY_BLINK_RENDERER_MODULES_WEBAUDIO_ANALYSER_NODE_H_ |
| #define THIRD_PARTY_BLINK_RENDERER_MODULES_WEBAUDIO_ANALYSER_NODE_H_ |
| |
| #include "third_party/blink/renderer/core/typed_arrays/array_buffer_view_helpers.h" |
| #include "third_party/blink/renderer/core/typed_arrays/dom_typed_array.h" |
| #include "third_party/blink/renderer/modules/webaudio/audio_basic_inspector_node.h" |
| #include "third_party/blink/renderer/modules/webaudio/realtime_analyser.h" |
| |
| namespace blink { |
| |
| class BaseAudioContext; |
| class AnalyserOptions; |
| class ExceptionState; |
| |
| class AnalyserHandler final : public AudioBasicInspectorHandler { |
| public: |
| static scoped_refptr<AnalyserHandler> Create(AudioNode&, float sample_rate); |
| ~AnalyserHandler() override; |
| |
| // AudioHandler |
| void Process(uint32_t frames_to_process) override; |
| |
| unsigned FftSize() const { return analyser_.FftSize(); } |
| void SetFftSize(unsigned size, ExceptionState&); |
| |
| unsigned FrequencyBinCount() const { return analyser_.FrequencyBinCount(); } |
| |
| void SetMinDecibels(double k, ExceptionState&); |
| double MinDecibels() const { return analyser_.MinDecibels(); } |
| |
| void SetMaxDecibels(double k, ExceptionState&); |
| double MaxDecibels() const { return analyser_.MaxDecibels(); } |
| |
| void SetMinMaxDecibels(double min, double max, ExceptionState&); |
| |
| void SetSmoothingTimeConstant(double k, ExceptionState&); |
| double SmoothingTimeConstant() const { |
| return analyser_.SmoothingTimeConstant(); |
| } |
| |
| void GetFloatFrequencyData(DOMFloat32Array* array, double current_time) { |
| analyser_.GetFloatFrequencyData(array, current_time); |
| } |
| void GetByteFrequencyData(DOMUint8Array* array, double current_time) { |
| analyser_.GetByteFrequencyData(array, current_time); |
| } |
| void GetFloatTimeDomainData(DOMFloat32Array* array) { |
| analyser_.GetFloatTimeDomainData(array); |
| } |
| void GetByteTimeDomainData(DOMUint8Array* array) { |
| analyser_.GetByteTimeDomainData(array); |
| } |
| |
| // AnalyserNode needs special handling when updating the pull status |
| // because the node must get pulled even if there are no inputs or |
| // outputs so that the internal state is properly updated with the |
| // correct time data. |
| void UpdatePullStatusIfNeeded() override; |
| |
| bool RequiresTailProcessing() const final; |
| double TailTime() const final; |
| |
| private: |
| AnalyserHandler(AudioNode&, float sample_rate); |
| bool PropagatesSilence() const override { |
| // An AnalyserNode does actually propogate silence, but to get the |
| // time and FFT data updated correctly, process() needs to be |
| // called even if all the inputs are silent. |
| return false; |
| } |
| |
| RealtimeAnalyser analyser_; |
| }; |
| |
| class AnalyserNode final : public AudioBasicInspectorNode { |
| DEFINE_WRAPPERTYPEINFO(); |
| |
| public: |
| static AnalyserNode* Create(BaseAudioContext&, ExceptionState&); |
| static AnalyserNode* Create(BaseAudioContext*, |
| const AnalyserOptions*, |
| ExceptionState&); |
| |
| unsigned fftSize() const; |
| void setFftSize(unsigned size, ExceptionState&); |
| unsigned frequencyBinCount() const; |
| void setMinDecibels(double, ExceptionState&); |
| double minDecibels() const; |
| void setMaxDecibels(double, ExceptionState&); |
| double maxDecibels() const; |
| void setSmoothingTimeConstant(double, ExceptionState&); |
| double smoothingTimeConstant() const; |
| void getFloatFrequencyData(NotShared<DOMFloat32Array>); |
| void getByteFrequencyData(NotShared<DOMUint8Array>); |
| void getFloatTimeDomainData(NotShared<DOMFloat32Array>); |
| void getByteTimeDomainData(NotShared<DOMUint8Array>); |
| |
| private: |
| AnalyserNode(BaseAudioContext&); |
| AnalyserHandler& GetAnalyserHandler() const; |
| |
| void SetMinMaxDecibels(double min, double max, ExceptionState&); |
| }; |
| |
| } // namespace blink |
| |
| #endif // THIRD_PARTY_BLINK_RENDERER_MODULES_WEBAUDIO_ANALYSER_NODE_H_ |