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1 /* | 1 /* |
2 * Copyright (C) 2011 Google Inc. All rights reserved. | 2 * Copyright (C) 2011 Google Inc. All rights reserved. |
3 * | 3 * |
4 * Redistribution and use in source and binary forms, with or without | 4 * Redistribution and use in source and binary forms, with or without |
5 * modification, are permitted provided that the following conditions | 5 * modification, are permitted provided that the following conditions |
6 * are met: | 6 * are met: |
7 * | 7 * |
8 * 1. Redistributions of source code must retain the above copyright | 8 * 1. Redistributions of source code must retain the above copyright |
9 * notice, this list of conditions and the following disclaimer. | 9 * notice, this list of conditions and the following disclaimer. |
10 * 2. Redistributions in binary form must reproduce the above copyright | 10 * 2. Redistributions in binary form must reproduce the above copyright |
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27 */ | 27 */ |
28 | 28 |
29 #ifndef MultiChannelResampler_h | 29 #ifndef MultiChannelResampler_h |
30 #define MultiChannelResampler_h | 30 #define MultiChannelResampler_h |
31 | 31 |
32 #include "platform/audio/SincResampler.h" | 32 #include "platform/audio/SincResampler.h" |
33 #include "wtf/Allocator.h" | 33 #include "wtf/Allocator.h" |
34 #include "wtf/Noncopyable.h" | 34 #include "wtf/Noncopyable.h" |
35 #include "wtf/OwnPtr.h" | 35 #include "wtf/OwnPtr.h" |
36 | 36 |
37 #if ENABLE(WEB_AUDIO) | |
38 | |
39 namespace blink { | 37 namespace blink { |
40 | 38 |
41 class AudioBus; | 39 class AudioBus; |
42 | 40 |
43 class PLATFORM_EXPORT MultiChannelResampler { | 41 class PLATFORM_EXPORT MultiChannelResampler { |
44 USING_FAST_MALLOC(MultiChannelResampler); | 42 USING_FAST_MALLOC(MultiChannelResampler); |
45 WTF_MAKE_NONCOPYABLE(MultiChannelResampler); | 43 WTF_MAKE_NONCOPYABLE(MultiChannelResampler); |
46 public: | 44 public: |
47 MultiChannelResampler(double scaleFactor, unsigned numberOfChannels); | 45 MultiChannelResampler(double scaleFactor, unsigned numberOfChannels); |
48 | 46 |
49 // Process given AudioSourceProvider for streaming applications. | 47 // Process given AudioSourceProvider for streaming applications. |
50 void process(AudioSourceProvider*, AudioBus* destination, size_t framesToPro
cess); | 48 void process(AudioSourceProvider*, AudioBus* destination, size_t framesToPro
cess); |
51 | 49 |
52 private: | 50 private: |
53 // FIXME: the mac port can have a more highly optimized implementation based
on CoreAudio | 51 // FIXME: the mac port can have a more highly optimized implementation based
on CoreAudio |
54 // instead of SincResampler. For now the default implementation will be used
on all ports. | 52 // instead of SincResampler. For now the default implementation will be used
on all ports. |
55 // https://bugs.webkit.org/show_bug.cgi?id=75118 | 53 // https://bugs.webkit.org/show_bug.cgi?id=75118 |
56 | 54 |
57 // Each channel will be resampled using a high-quality SincResampler. | 55 // Each channel will be resampled using a high-quality SincResampler. |
58 Vector<OwnPtr<SincResampler>> m_kernels; | 56 Vector<OwnPtr<SincResampler>> m_kernels; |
59 | 57 |
60 unsigned m_numberOfChannels; | 58 unsigned m_numberOfChannels; |
61 }; | 59 }; |
62 | 60 |
63 } // namespace blink | 61 } // namespace blink |
64 | 62 |
65 #endif // ENABLE(WEB_AUDIO) | |
66 | |
67 #endif // MultiChannelResampler_h | 63 #endif // MultiChannelResampler_h |
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