15c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)/* 25c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * Copyright (C) 2010 Google Inc. All rights reserved. 35c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * 45c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * Redistribution and use in source and binary forms, with or without 55c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * modification, are permitted provided that the following conditions 65c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * are met: 75c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * 85c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * 1. Redistributions of source code must retain the above copyright 95c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * notice, this list of conditions and the following disclaimer. 105c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * 2. 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IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY 215c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 225c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 235c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 245c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 255c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 265c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 275c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) */ 285c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 295c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)#ifndef ReverbInputBuffer_h 305c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)#define ReverbInputBuffer_h 315c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 321e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles)#include "platform/PlatformExport.h" 331e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles)#include "platform/audio/AudioArray.h" 345c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 355c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)namespace WebCore { 365c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 375c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)// ReverbInputBuffer is used to buffer input samples for deferred processing by the background threads. 381e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles)class PLATFORM_EXPORT ReverbInputBuffer { 395c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)public: 405c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) ReverbInputBuffer(size_t length); 415c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 425c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) // The realtime audio thread keeps writing samples here. 435c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) // The assumption is that the buffer's length is evenly divisible by numberOfFrames (for nearly all cases this will be fine). 445c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) // FIXME: remove numberOfFrames restriction... 455c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) void write(const float* sourceP, size_t numberOfFrames); 465c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 475c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) // Background threads can call this to check if there's anything to read... 485c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) size_t writeIndex() const { return m_writeIndex; } 495c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 505c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) // The individual background threads read here (and hope that they can keep up with the buffer writing). 515c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) // readIndex is updated with the next readIndex to read from... 525c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) // The assumption is that the buffer's length is evenly divisible by numberOfFrames. 535c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) // FIXME: remove numberOfFrames restriction... 545c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) float* directReadFrom(int* readIndex, size_t numberOfFrames); 555c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 565c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) void reset(); 575c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 585c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)private: 595c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) AudioFloatArray m_buffer; 605c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) size_t m_writeIndex; 615c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)}; 625c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 635c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)} // namespace WebCore 645c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 655c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)#endif // ReverbInputBuffer_h 66