From 6bf0a5cb5034a7e684dcc3500e841785237ce2dd Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 19:32:43 +0200 Subject: Adding upstream version 1:115.7.0. Signed-off-by: Daniel Baumann --- .../webaudio/blink/ReverbAccumulationBuffer.h | 76 ++++++++++++++++++++++ 1 file changed, 76 insertions(+) create mode 100644 dom/media/webaudio/blink/ReverbAccumulationBuffer.h (limited to 'dom/media/webaudio/blink/ReverbAccumulationBuffer.h') diff --git a/dom/media/webaudio/blink/ReverbAccumulationBuffer.h b/dom/media/webaudio/blink/ReverbAccumulationBuffer.h new file mode 100644 index 0000000000..8883a56a73 --- /dev/null +++ b/dom/media/webaudio/blink/ReverbAccumulationBuffer.h @@ -0,0 +1,76 @@ +/* + * 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. + * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of + * its contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY APPLE 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 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 ReverbAccumulationBuffer_h +#define ReverbAccumulationBuffer_h + +#include "AlignedTArray.h" +#include "mozilla/MemoryReporting.h" + +namespace WebCore { + +// ReverbAccumulationBuffer is a circular delay buffer with one client reading +// from it and multiple clients writing/accumulating to it at different delay +// offsets from the read position. The read operation will zero the memory just +// read from the buffer, so it will be ready for accumulation the next time +// around. +class ReverbAccumulationBuffer { + public: + ReverbAccumulationBuffer(); + // Returns false on failure. + bool allocate(size_t length); + + // This will read from, then clear-out numberOfFrames + void readAndClear(float* destination, size_t numberOfFrames); + + // Each ReverbConvolverStage will accumulate its output at the appropriate + // delay from the read position. We need to pass in and update readIndex here, + // since each ReverbConvolverStage may be running in a different thread than + // the realtime thread calling ReadAndClear() and maintaining m_readIndex + void accumulate(const float* source, size_t numberOfFrames, size_t* readIndex, + size_t delayFrames); + + size_t readIndex() const { return m_readIndex; } + + size_t readTimeFrame() const { return m_readTimeFrame; } + + void reset(); + + size_t sizeOfExcludingThis(mozilla::MallocSizeOf aMallocSizeOf) const { + return m_buffer.ShallowSizeOfExcludingThis(aMallocSizeOf); + } + + private: + AlignedTArray m_buffer; + size_t m_readIndex; + size_t m_readTimeFrame; // for debugging (frame on continuous timeline) +}; + +} // namespace WebCore + +#endif // ReverbAccumulationBuffer_h -- cgit v1.2.3