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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 11 matching lines...) Expand all Loading... |
| 22 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | 22 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| 23 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND | 23 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| 24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | 24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF | 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| 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 "SincResampler.h" | 32 #include "core/platform/audio/SincResampler.h" |
| 33 #include <wtf/OwnPtr.h> | 33 #include <wtf/OwnPtr.h> |
| 34 | 34 |
| 35 namespace WebCore { | 35 namespace WebCore { |
| 36 | 36 |
| 37 class AudioBus; | 37 class AudioBus; |
| 38 | 38 |
| 39 class MultiChannelResampler { | 39 class MultiChannelResampler { |
| 40 public: | 40 public: |
| 41 MultiChannelResampler(double scaleFactor, unsigned numberOfChannels); | 41 MultiChannelResampler(double scaleFactor, unsigned numberOfChannels); |
| 42 | 42 |
| 43 // Process given AudioSourceProvider for streaming applications. | 43 // Process given AudioSourceProvider for streaming applications. |
| 44 void process(AudioSourceProvider*, AudioBus* destination, size_t framesToPro
cess); | 44 void process(AudioSourceProvider*, AudioBus* destination, size_t framesToPro
cess); |
| 45 | 45 |
| 46 private: | 46 private: |
| 47 // FIXME: the mac port can have a more highly optimized implementation based
on CoreAudio | 47 // FIXME: the mac port can have a more highly optimized implementation based
on CoreAudio |
| 48 // instead of SincResampler. For now the default implementation will be used
on all ports. | 48 // instead of SincResampler. For now the default implementation will be used
on all ports. |
| 49 // https://bugs.webkit.org/show_bug.cgi?id=75118 | 49 // https://bugs.webkit.org/show_bug.cgi?id=75118 |
| 50 | 50 |
| 51 // Each channel will be resampled using a high-quality SincResampler. | 51 // Each channel will be resampled using a high-quality SincResampler. |
| 52 Vector<OwnPtr<SincResampler> > m_kernels; | 52 Vector<OwnPtr<SincResampler> > m_kernels; |
| 53 | 53 |
| 54 unsigned m_numberOfChannels; | 54 unsigned m_numberOfChannels; |
| 55 }; | 55 }; |
| 56 | 56 |
| 57 } // namespace WebCore | 57 } // namespace WebCore |
| 58 | 58 |
| 59 #endif // MultiChannelResampler_h | 59 #endif // MultiChannelResampler_h |
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