1a94275402997c11dd2e778633dacf4b7e630a35dBen Murdoch/* 2a94275402997c11dd2e778633dacf4b7e630a35dBen Murdoch * Copyright (C) 2010, Google Inc. All rights reserved. 3a94275402997c11dd2e778633dacf4b7e630a35dBen Murdoch * 4a94275402997c11dd2e778633dacf4b7e630a35dBen Murdoch * Redistribution and use in source and binary forms, with or without 5a94275402997c11dd2e778633dacf4b7e630a35dBen Murdoch * modification, are permitted provided that the following conditions 6a94275402997c11dd2e778633dacf4b7e630a35dBen Murdoch * are met: 7a94275402997c11dd2e778633dacf4b7e630a35dBen Murdoch * 1. Redistributions of source code must retain the above copyright 8a94275402997c11dd2e778633dacf4b7e630a35dBen Murdoch * notice, this list of conditions and the following disclaimer. 9a94275402997c11dd2e778633dacf4b7e630a35dBen Murdoch * 2. Redistributions in binary form must reproduce the above copyright 10a94275402997c11dd2e778633dacf4b7e630a35dBen Murdoch * notice, this list of conditions and the following disclaimer in the 11a94275402997c11dd2e778633dacf4b7e630a35dBen Murdoch * documentation and/or other materials provided with the distribution. 12a94275402997c11dd2e778633dacf4b7e630a35dBen Murdoch * 13a94275402997c11dd2e778633dacf4b7e630a35dBen Murdoch * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY 14a94275402997c11dd2e778633dacf4b7e630a35dBen Murdoch * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 15a94275402997c11dd2e778633dacf4b7e630a35dBen Murdoch * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 16a94275402997c11dd2e778633dacf4b7e630a35dBen Murdoch * DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY 17a94275402997c11dd2e778633dacf4b7e630a35dBen Murdoch * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 18a94275402997c11dd2e778633dacf4b7e630a35dBen Murdoch * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 19a94275402997c11dd2e778633dacf4b7e630a35dBen Murdoch * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON 20a94275402997c11dd2e778633dacf4b7e630a35dBen Murdoch * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 21a94275402997c11dd2e778633dacf4b7e630a35dBen Murdoch * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 22a94275402997c11dd2e778633dacf4b7e630a35dBen Murdoch * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 23a94275402997c11dd2e778633dacf4b7e630a35dBen Murdoch */ 24a94275402997c11dd2e778633dacf4b7e630a35dBen Murdoch 25a94275402997c11dd2e778633dacf4b7e630a35dBen Murdoch#ifndef DelayDSPKernel_h 26a94275402997c11dd2e778633dacf4b7e630a35dBen Murdoch#define DelayDSPKernel_h 27a94275402997c11dd2e778633dacf4b7e630a35dBen Murdoch 28a94275402997c11dd2e778633dacf4b7e630a35dBen Murdoch#include "AudioArray.h" 29a94275402997c11dd2e778633dacf4b7e630a35dBen Murdoch#include "AudioDSPKernel.h" 30a94275402997c11dd2e778633dacf4b7e630a35dBen Murdoch#include "DelayProcessor.h" 31a94275402997c11dd2e778633dacf4b7e630a35dBen Murdoch 32a94275402997c11dd2e778633dacf4b7e630a35dBen Murdochnamespace WebCore { 33a94275402997c11dd2e778633dacf4b7e630a35dBen Murdoch 34a94275402997c11dd2e778633dacf4b7e630a35dBen Murdochclass DelayProcessor; 35a94275402997c11dd2e778633dacf4b7e630a35dBen Murdoch 36a94275402997c11dd2e778633dacf4b7e630a35dBen Murdochclass DelayDSPKernel : public AudioDSPKernel { 37a94275402997c11dd2e778633dacf4b7e630a35dBen Murdochpublic: 38a94275402997c11dd2e778633dacf4b7e630a35dBen Murdoch DelayDSPKernel(DelayProcessor*); 39a94275402997c11dd2e778633dacf4b7e630a35dBen Murdoch DelayDSPKernel(double maxDelayTime, double sampleRate); 40a94275402997c11dd2e778633dacf4b7e630a35dBen Murdoch 41a94275402997c11dd2e778633dacf4b7e630a35dBen Murdoch virtual void process(const float* source, float* destination, size_t framesToProcess); 42a94275402997c11dd2e778633dacf4b7e630a35dBen Murdoch virtual void reset(); 43a94275402997c11dd2e778633dacf4b7e630a35dBen Murdoch 44a94275402997c11dd2e778633dacf4b7e630a35dBen Murdoch double maxDelayTime() const { return m_maxDelayTime; } 45a94275402997c11dd2e778633dacf4b7e630a35dBen Murdoch 46a94275402997c11dd2e778633dacf4b7e630a35dBen Murdoch void setDelayFrames(double numberOfFrames) { m_desiredDelayFrames = numberOfFrames; } 47a94275402997c11dd2e778633dacf4b7e630a35dBen Murdoch 48a94275402997c11dd2e778633dacf4b7e630a35dBen Murdochprivate: 49a94275402997c11dd2e778633dacf4b7e630a35dBen Murdoch AudioFloatArray m_buffer; 50a94275402997c11dd2e778633dacf4b7e630a35dBen Murdoch double m_maxDelayTime; 51a94275402997c11dd2e778633dacf4b7e630a35dBen Murdoch int m_writeIndex; 52a94275402997c11dd2e778633dacf4b7e630a35dBen Murdoch double m_currentDelayTime; 53a94275402997c11dd2e778633dacf4b7e630a35dBen Murdoch double m_smoothingRate; 54a94275402997c11dd2e778633dacf4b7e630a35dBen Murdoch bool m_firstTime; 55a94275402997c11dd2e778633dacf4b7e630a35dBen Murdoch double m_desiredDelayFrames; 56a94275402997c11dd2e778633dacf4b7e630a35dBen Murdoch 57a94275402997c11dd2e778633dacf4b7e630a35dBen Murdoch DelayProcessor* delayProcessor() { return static_cast<DelayProcessor*>(processor()); } 58a94275402997c11dd2e778633dacf4b7e630a35dBen Murdoch}; 59a94275402997c11dd2e778633dacf4b7e630a35dBen Murdoch 60a94275402997c11dd2e778633dacf4b7e630a35dBen Murdoch} // namespace WebCore 61a94275402997c11dd2e778633dacf4b7e630a35dBen Murdoch 62a94275402997c11dd2e778633dacf4b7e630a35dBen Murdoch#endif // DelayDSPKernel_h 63