1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/content/media/webaudio/blink/ReverbInputBuffer.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,71 @@
1.4 +/*
1.5 + * Copyright (C) 2010 Google Inc. All rights reserved.
1.6 + *
1.7 + * Redistribution and use in source and binary forms, with or without
1.8 + * modification, are permitted provided that the following conditions
1.9 + * are met:
1.10 + *
1.11 + * 1. Redistributions of source code must retain the above copyright
1.12 + * notice, this list of conditions and the following disclaimer.
1.13 + * 2. Redistributions in binary form must reproduce the above copyright
1.14 + * notice, this list of conditions and the following disclaimer in the
1.15 + * documentation and/or other materials provided with the distribution.
1.16 + * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of
1.17 + * its contributors may be used to endorse or promote products derived
1.18 + * from this software without specific prior written permission.
1.19 + *
1.20 + * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
1.21 + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
1.22 + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
1.23 + * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
1.24 + * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
1.25 + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
1.26 + * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
1.27 + * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
1.28 + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
1.29 + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
1.30 + */
1.31 +
1.32 +#ifndef ReverbInputBuffer_h
1.33 +#define ReverbInputBuffer_h
1.34 +
1.35 +#include "nsTArray.h"
1.36 +#include "mozilla/MemoryReporting.h"
1.37 +
1.38 +namespace WebCore {
1.39 +
1.40 +// ReverbInputBuffer is used to buffer input samples for deferred processing by the background threads.
1.41 +class ReverbInputBuffer {
1.42 +public:
1.43 + ReverbInputBuffer(size_t length);
1.44 +
1.45 + // The realtime audio thread keeps writing samples here.
1.46 + // The assumption is that the buffer's length is evenly divisible by numberOfFrames (for nearly all cases this will be fine).
1.47 + // FIXME: remove numberOfFrames restriction...
1.48 + void write(const float* sourceP, size_t numberOfFrames);
1.49 +
1.50 + // Background threads can call this to check if there's anything to read...
1.51 + size_t writeIndex() const { return m_writeIndex; }
1.52 +
1.53 + // The individual background threads read here (and hope that they can keep up with the buffer writing).
1.54 + // readIndex is updated with the next readIndex to read from...
1.55 + // The assumption is that the buffer's length is evenly divisible by numberOfFrames.
1.56 + // FIXME: remove numberOfFrames restriction...
1.57 + float* directReadFrom(int* readIndex, size_t numberOfFrames);
1.58 +
1.59 + void reset();
1.60 +
1.61 + size_t sizeOfExcludingThis(mozilla::MallocSizeOf aMallocSizeOf) const
1.62 + {
1.63 + return m_buffer.SizeOfExcludingThis(aMallocSizeOf);
1.64 + }
1.65 +
1.66 +
1.67 +private:
1.68 + nsTArray<float> m_buffer;
1.69 + size_t m_writeIndex;
1.70 +};
1.71 +
1.72 +} // namespace WebCore
1.73 +
1.74 +#endif // ReverbInputBuffer_h
