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
35namespace WebCore {
36
37template<typename T>
38class AudioArray : public Vector<T> {
39public:
40    AudioArray() : Vector<T>(0) { }
41    explicit AudioArray(size_t n) : Vector<T>(n, 0) { }
42
43    void zero() { memset(this->data(), 0, sizeof(T) * this->size()); }
44
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
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
66typedef AudioArray<float> AudioFloatArray;
67typedef AudioArray<double> AudioDoubleArray;
68
69} // WebCore
70
71#endif // AudioArray_h
72