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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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26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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/Noncopyable.h" | 33 #include "wtf/Noncopyable.h" |
34 #include "wtf/OwnPtr.h" | 34 #include "wtf/OwnPtr.h" |
35 | 35 |
36 namespace WebCore { | 36 namespace blink { |
37 | 37 |
38 class AudioBus; | 38 class AudioBus; |
39 | 39 |
40 class PLATFORM_EXPORT MultiChannelResampler { | 40 class PLATFORM_EXPORT MultiChannelResampler { |
41 WTF_MAKE_NONCOPYABLE(MultiChannelResampler); | 41 WTF_MAKE_NONCOPYABLE(MultiChannelResampler); |
42 public: | 42 public: |
43 MultiChannelResampler(double scaleFactor, unsigned numberOfChannels); | 43 MultiChannelResampler(double scaleFactor, unsigned numberOfChannels); |
44 | 44 |
45 // Process given AudioSourceProvider for streaming applications. | 45 // Process given AudioSourceProvider for streaming applications. |
46 void process(AudioSourceProvider*, AudioBus* destination, size_t framesToPro
cess); | 46 void process(AudioSourceProvider*, AudioBus* destination, size_t framesToPro
cess); |
47 | 47 |
48 private: | 48 private: |
49 // FIXME: the mac port can have a more highly optimized implementation based
on CoreAudio | 49 // FIXME: the mac port can have a more highly optimized implementation based
on CoreAudio |
50 // instead of SincResampler. For now the default implementation will be used
on all ports. | 50 // instead of SincResampler. For now the default implementation will be used
on all ports. |
51 // https://bugs.webkit.org/show_bug.cgi?id=75118 | 51 // https://bugs.webkit.org/show_bug.cgi?id=75118 |
52 | 52 |
53 // Each channel will be resampled using a high-quality SincResampler. | 53 // Each channel will be resampled using a high-quality SincResampler. |
54 Vector<OwnPtr<SincResampler> > m_kernels; | 54 Vector<OwnPtr<SincResampler> > m_kernels; |
55 | 55 |
56 unsigned m_numberOfChannels; | 56 unsigned m_numberOfChannels; |
57 }; | 57 }; |
58 | 58 |
59 } // namespace WebCore | 59 } // namespace blink |
60 | 60 |
61 #endif // MultiChannelResampler_h | 61 #endif // MultiChannelResampler_h |
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