| /* |
| * 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_PLATFORM_AUDIO_AUDIO_DELAY_DSP_KERNEL_H_ |
| #define THIRD_PARTY_BLINK_RENDERER_PLATFORM_AUDIO_AUDIO_DELAY_DSP_KERNEL_H_ |
| |
| #include "third_party/blink/renderer/platform/audio/audio_array.h" |
| #include "third_party/blink/renderer/platform/audio/audio_dsp_kernel.h" |
| |
| namespace blink { |
| |
| class PLATFORM_EXPORT AudioDelayDSPKernel : public AudioDSPKernel { |
| public: |
| AudioDelayDSPKernel(double max_delay_time, float sample_rate); |
| |
| void Process(const float* source, |
| float* destination, |
| uint32_t frames_to_process) override; |
| void Reset() override; |
| |
| double MaxDelayTime() const { return max_delay_time_; } |
| |
| void SetDelayFrames(double number_of_frames) { |
| desired_delay_frames_ = number_of_frames; |
| } |
| |
| double TailTime() const override; |
| double LatencyTime() const override; |
| bool RequiresTailProcessing() const override; |
| |
| protected: |
| AudioDelayDSPKernel(AudioDSPKernelProcessor*, |
| size_t processing_size_in_frames); |
| |
| virtual bool HasSampleAccurateValues(); |
| virtual void CalculateSampleAccurateValues(float* delay_times, |
| uint32_t frames_to_process); |
| virtual double DelayTime(float sample_rate); |
| |
| AudioFloatArray buffer_; |
| double max_delay_time_; |
| int write_index_; |
| double desired_delay_frames_; |
| |
| AudioFloatArray delay_times_; |
| |
| size_t BufferLengthForDelay(double delay_time, double sample_rate) const; |
| }; |
| |
| } // namespace blink |
| |
| #endif // THIRD_PARTY_BLINK_RENDERER_PLATFORM_AUDIO_AUDIO_DELAY_DSP_KERNEL_H_ |