| /* |
| * Copyright (C) 2011, 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_WAVE_SHAPER_PROCESSOR_H_ |
| #define THIRD_PARTY_BLINK_RENDERER_MODULES_WEBAUDIO_WAVE_SHAPER_PROCESSOR_H_ |
| |
| #include <memory> |
| #include "base/memory/scoped_refptr.h" |
| #include "third_party/blink/renderer/core/typed_arrays/dom_typed_array.h" |
| #include "third_party/blink/renderer/modules/webaudio/audio_node.h" |
| #include "third_party/blink/renderer/platform/audio/audio_dsp_kernel.h" |
| #include "third_party/blink/renderer/platform/audio/audio_dsp_kernel_processor.h" |
| #include "third_party/blink/renderer/platform/wtf/threading_primitives.h" |
| |
| namespace blink { |
| |
| // WaveShaperProcessor is an AudioDSPKernelProcessor which uses |
| // WaveShaperDSPKernel objects to implement non-linear distortion effects. |
| |
| class WaveShaperProcessor final : public AudioDSPKernelProcessor { |
| public: |
| enum OverSampleType { kOverSampleNone, kOverSample2x, kOverSample4x }; |
| |
| WaveShaperProcessor(float sample_rate, unsigned number_of_channels); |
| |
| ~WaveShaperProcessor() override; |
| |
| std::unique_ptr<AudioDSPKernel> CreateKernel() override; |
| |
| void Process(const AudioBus* source, |
| AudioBus* destination, |
| uint32_t frames_to_process) override; |
| |
| void SetCurve(const float* curve_data, unsigned curve_length); |
| Vector<float>* Curve() const { return curve_.get(); } |
| |
| void SetOversample(OverSampleType); |
| OverSampleType Oversample() const { return oversample_; } |
| |
| private: |
| // m_curve represents the non-linear shaping curve. |
| std::unique_ptr<Vector<float>> curve_; |
| |
| OverSampleType oversample_; |
| }; |
| |
| } // namespace blink |
| |
| #endif // THIRD_PARTY_BLINK_RENDERER_MODULES_WEBAUDIO_WAVE_SHAPER_PROCESSOR_H_ |