The Tor Browser / file revision

 /*

  * 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 "nsTArray.h"

 #include "mozilla/MemoryReporting.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(const 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();

     size_t sizeOfExcludingThis(mozilla::MallocSizeOf aMallocSizeOf) const

     {

         return m_buffer.SizeOfExcludingThis(aMallocSizeOf);

     }

 private:

     nsTArray<float> m_buffer;

     size_t m_writeIndex;

 };

 } // namespace WebCore

 #endif // ReverbInputBuffer_h