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Diffstat (limited to 'WebCore/platform/audio/ReverbAccumulationBuffer.cpp')
-rw-r--r-- | WebCore/platform/audio/ReverbAccumulationBuffer.cpp | 119 |
1 files changed, 0 insertions, 119 deletions
diff --git a/WebCore/platform/audio/ReverbAccumulationBuffer.cpp b/WebCore/platform/audio/ReverbAccumulationBuffer.cpp deleted file mode 100644 index 3d694d1..0000000 --- a/WebCore/platform/audio/ReverbAccumulationBuffer.cpp +++ /dev/null @@ -1,119 +0,0 @@ -/* - * 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. - */ - -#include "config.h" - -#if ENABLE(WEB_AUDIO) - -#include "ReverbAccumulationBuffer.h" - -#include "VectorMath.h" - -namespace WebCore { - -using namespace VectorMath; - -ReverbAccumulationBuffer::ReverbAccumulationBuffer(size_t length) - : m_buffer(length) - , m_readIndex(0) - , m_readTimeFrame(0) -{ -} - -void ReverbAccumulationBuffer::readAndClear(float* destination, size_t numberOfFrames) -{ - size_t bufferLength = m_buffer.size(); - bool isCopySafe = m_readIndex <= bufferLength && numberOfFrames <= bufferLength; - - ASSERT(isCopySafe); - if (!isCopySafe) - return; - - size_t framesAvailable = bufferLength - m_readIndex; - size_t numberOfFrames1 = std::min(numberOfFrames, framesAvailable); - size_t numberOfFrames2 = numberOfFrames - numberOfFrames1; - - float* source = m_buffer.data(); - memcpy(destination, source + m_readIndex, sizeof(float) * numberOfFrames1); - memset(source + m_readIndex, 0, sizeof(float) * numberOfFrames1); - - // Handle wrap-around if necessary - if (numberOfFrames2 > 0) { - memcpy(destination + numberOfFrames1, source, sizeof(float) * numberOfFrames2); - memset(source, 0, sizeof(float) * numberOfFrames2); - } - - m_readIndex = (m_readIndex + numberOfFrames) % bufferLength; - m_readTimeFrame += numberOfFrames; -} - -void ReverbAccumulationBuffer::updateReadIndex(int* readIndex, size_t numberOfFrames) const -{ - // Update caller's readIndex - *readIndex = (*readIndex + numberOfFrames) % m_buffer.size(); -} - -int ReverbAccumulationBuffer::accumulate(float* source, size_t numberOfFrames, int* readIndex, size_t delayFrames) -{ - size_t bufferLength = m_buffer.size(); - - size_t writeIndex = (*readIndex + delayFrames) % bufferLength; - - // Update caller's readIndex - *readIndex = (*readIndex + numberOfFrames) % bufferLength; - - size_t framesAvailable = bufferLength - writeIndex; - size_t numberOfFrames1 = std::min(numberOfFrames, framesAvailable); - size_t numberOfFrames2 = numberOfFrames - numberOfFrames1; - - float* destination = m_buffer.data(); - - bool isSafe = writeIndex <= bufferLength && numberOfFrames1 + writeIndex <= bufferLength && numberOfFrames2 <= bufferLength; - ASSERT(isSafe); - if (!isSafe) - return 0; - - vadd(source, 1, destination + writeIndex, 1, destination + writeIndex, 1, numberOfFrames1); - - // Handle wrap-around if necessary - if (numberOfFrames2 > 0) - vadd(source + numberOfFrames1, 1, destination, 1, destination, 1, numberOfFrames2); - - return writeIndex; -} - -void ReverbAccumulationBuffer::reset() -{ - m_buffer.zero(); - m_readIndex = 0; - m_readTimeFrame = 0; -} - -} // namespace WebCore - -#endif // ENABLE(WEB_AUDIO) |