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 * 1.  Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2.  Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
15 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
16 * DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
17 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
18 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
19 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
20 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
22 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
23 */
24
25#include "config.h"
26
27#if ENABLE(WEB_AUDIO)
28
29#include "VectorMath.h"
30
31#if OS(DARWIN)
32#include <Accelerate/Accelerate.h>
33#endif
34
35namespace WebCore {
36
37namespace VectorMath {
38
39#if OS(DARWIN)
40// On the Mac we use the highly optimized versions in Accelerate.framework
41// In 32-bit mode (__ppc__ or __i386__) <Accelerate/Accelerate.h> includes <vecLib/vDSP_translate.h> which defines macros of the same name as
42// our namespaced function names, so we must handle this case differently.  Other architectures (64bit, ARM, etc.) do not include this header file.
43
44void vsmul(const float* sourceP, int sourceStride, const float* scale, float* destP, int destStride, size_t framesToProcess)
45{
46#if defined(__ppc__) || defined(__i386__)
47    ::vsmul(sourceP, sourceStride, scale, destP, destStride, framesToProcess);
48#else
49    vDSP_vsmul(sourceP, sourceStride, scale, destP, destStride, framesToProcess);
50#endif
51}
52
53void vadd(const float* source1P, int sourceStride1, const float* source2P, int sourceStride2, float* destP, int destStride, size_t framesToProcess)
54{
55#if defined(__ppc__) || defined(__i386__)
56    ::vadd(source1P, sourceStride1, source2P, sourceStride2, destP, destStride, framesToProcess);
57#else
58    vDSP_vadd(source1P, sourceStride1, source2P, sourceStride2, destP, destStride, framesToProcess);
59#endif
60}
61
62#else
63
64void vsmul(const float* sourceP, int sourceStride, const float* scale, float* destP, int destStride, size_t framesToProcess)
65{
66    // FIXME: optimize for SSE
67    int n = framesToProcess;
68    float k = *scale;
69    while (n--) {
70        *destP = k * *sourceP;
71        sourceP += sourceStride;
72        destP += destStride;
73    }
74}
75
76void vadd(const float* source1P, int sourceStride1, const float* source2P, int sourceStride2, float* destP, int destStride, size_t framesToProcess)
77{
78    // FIXME: optimize for SSE
79    int n = framesToProcess;
80    while (n--) {
81        *destP = *source1P + *source2P;
82        source1P += sourceStride1;
83        source2P += sourceStride2;
84        destP += destStride;
85    }
86}
87
88#endif // OS(DARWIN)
89
90} // namespace VectorMath
91
92} // namespace WebCore
93
94#endif // ENABLE(WEB_AUDIO)
95