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65 lines
2.7 KiB
C++
65 lines
2.7 KiB
C++
/*
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* Copyright (C) 2010 Google Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of
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* its contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef ReverbInputBuffer_h
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#define ReverbInputBuffer_h
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#include "nsTArray.h"
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namespace WebCore {
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// ReverbInputBuffer is used to buffer input samples for deferred processing by the background threads.
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class ReverbInputBuffer {
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public:
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ReverbInputBuffer(size_t length);
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// The realtime audio thread keeps writing samples here.
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// The assumption is that the buffer's length is evenly divisible by numberOfFrames (for nearly all cases this will be fine).
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// FIXME: remove numberOfFrames restriction...
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void write(const float* sourceP, size_t numberOfFrames);
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// Background threads can call this to check if there's anything to read...
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size_t writeIndex() const { return m_writeIndex; }
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// The individual background threads read here (and hope that they can keep up with the buffer writing).
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// readIndex is updated with the next readIndex to read from...
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// The assumption is that the buffer's length is evenly divisible by numberOfFrames.
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// FIXME: remove numberOfFrames restriction...
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float* directReadFrom(int* readIndex, size_t numberOfFrames);
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void reset();
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private:
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nsTArray<float> m_buffer;
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size_t m_writeIndex;
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};
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} // namespace WebCore
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#endif // ReverbInputBuffer_h
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