1 /* 2 * Copyright (C) 2010 Google Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of 14 * its contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY 18 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 19 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 20 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY 21 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 22 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 23 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #ifndef AudioArray_h 30 #define AudioArray_h 31 32 #include <string.h> 33 #include <wtf/Vector.h> 34 35 namespace WebCore { 36 37 template<typename T> 38 class AudioArray : public Vector<T> { 39 public: AudioArray()40 AudioArray() : Vector<T>(0) { } AudioArray(size_t n)41 explicit AudioArray(size_t n) : Vector<T>(n, 0) { } 42 zero()43 void zero() { memset(this->data(), 0, sizeof(T) * this->size()); } 44 zeroRange(unsigned start,unsigned end)45 void zeroRange(unsigned start, unsigned end) 46 { 47 bool isSafe = (start <= end) && (end <= this->size()); 48 ASSERT(isSafe); 49 if (!isSafe) 50 return; 51 52 memset(this->data() + start, 0, sizeof(T) * (end - start)); 53 } 54 copyToRange(T * sourceData,unsigned start,unsigned end)55 void copyToRange(T* sourceData, unsigned start, unsigned end) 56 { 57 bool isSafe = (start <= end) && (end <= this->size()); 58 ASSERT(isSafe); 59 if (!isSafe) 60 return; 61 62 memcpy(this->data() + start, sourceData, sizeof(T) * (end - start)); 63 } 64 }; 65 66 typedef AudioArray<float> AudioFloatArray; 67 typedef AudioArray<double> AudioDoubleArray; 68 69 } // WebCore 70 71 #endif // AudioArray_h 72