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author | Steve Block <steveblock@google.com> | 2011-05-06 11:45:16 +0100 |
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committer | Steve Block <steveblock@google.com> | 2011-05-12 13:44:10 +0100 |
commit | cad810f21b803229eb11403f9209855525a25d57 (patch) | |
tree | 29a6fd0279be608e0fe9ffe9841f722f0f4e4269 /Source/WebCore/platform/audio/ReverbInputBuffer.h | |
parent | 121b0cf4517156d0ac5111caf9830c51b69bae8f (diff) | |
download | external_webkit-cad810f21b803229eb11403f9209855525a25d57.zip external_webkit-cad810f21b803229eb11403f9209855525a25d57.tar.gz external_webkit-cad810f21b803229eb11403f9209855525a25d57.tar.bz2 |
Merge WebKit at r75315: Initial merge by git.
Change-Id: I570314b346ce101c935ed22a626b48c2af266b84
Diffstat (limited to 'Source/WebCore/platform/audio/ReverbInputBuffer.h')
-rw-r--r-- | Source/WebCore/platform/audio/ReverbInputBuffer.h | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/Source/WebCore/platform/audio/ReverbInputBuffer.h b/Source/WebCore/platform/audio/ReverbInputBuffer.h new file mode 100644 index 0000000..15a2818 --- /dev/null +++ b/Source/WebCore/platform/audio/ReverbInputBuffer.h @@ -0,0 +1,64 @@ +/* + * 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 ReverbInputBuffer_h +#define ReverbInputBuffer_h + +#include "AudioArray.h" + +namespace WebCore { + +// ReverbInputBuffer is used to buffer input samples for deferred processing by the background threads. +class ReverbInputBuffer { +public: + ReverbInputBuffer(size_t length); + + // The realtime audio thread keeps writing samples here. + // The assumption is that the buffer's length is evenly divisible by numberOfFrames (for nearly all cases this will be fine). + // FIXME: remove numberOfFrames restriction... + void write(float* sourceP, size_t numberOfFrames); + + // Background threads can call this to check if there's anything to read... + size_t writeIndex() const { return m_writeIndex; } + + // The individual background threads read here (and hope that they can keep up with the buffer writing). + // readIndex is updated with the next readIndex to read from... + // The assumption is that the buffer's length is evenly divisible by numberOfFrames. + // FIXME: remove numberOfFrames restriction... + float* directReadFrom(int* readIndex, size_t numberOfFrames); + + void reset(); + +private: + AudioFloatArray m_buffer; + size_t m_writeIndex; +}; + +} // namespace WebCore + +#endif // ReverbInputBuffer_h |