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
35 namespace WebCore {
36
37 namespace 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
vsmul(const float * sourceP,int sourceStride,const float * scale,float * destP,int destStride,size_t framesToProcess)44 void 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
vadd(const float * source1P,int sourceStride1,const float * source2P,int sourceStride2,float * destP,int destStride,size_t framesToProcess)53 void 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
64 void 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
76 void 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