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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 |
| (...skipping 15 matching lines...) Expand all Loading... |
| 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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