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| 1 /* | 1 /* |
| 2 * Copyright (C) 2010 Google Inc. All rights reserved. | 2 * Copyright (C) 2010 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 FFTConvolver_h | 29 #ifndef FFTConvolver_h |
| 30 #define FFTConvolver_h | 30 #define FFTConvolver_h |
| 31 | 31 |
| 32 #include "AudioArray.h" | 32 #include "core/platform/audio/AudioArray.h" |
| 33 #include "FFTFrame.h" | 33 #include "core/platform/audio/FFTFrame.h" |
| 34 | 34 |
| 35 namespace WebCore { | 35 namespace WebCore { |
| 36 | 36 |
| 37 class FFTConvolver { | 37 class FFTConvolver { |
| 38 public: | 38 public: |
| 39 // fftSize must be a power of two | 39 // fftSize must be a power of two |
| 40 FFTConvolver(size_t fftSize); | 40 FFTConvolver(size_t fftSize); |
| 41 | 41 |
| 42 // For now, with multiple calls to Process(), framesToProcess MUST add up EX
ACTLY to fftSize / 2 | 42 // For now, with multiple calls to Process(), framesToProcess MUST add up EX
ACTLY to fftSize / 2 |
| 43 // | 43 // |
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| 62 // Stores output which we read a little at a time | 62 // Stores output which we read a little at a time |
| 63 AudioFloatArray m_outputBuffer; | 63 AudioFloatArray m_outputBuffer; |
| 64 | 64 |
| 65 // Saves the 2nd half of the FFT buffer, so we can do an overlap-add with th
e 1st half of the next one | 65 // Saves the 2nd half of the FFT buffer, so we can do an overlap-add with th
e 1st half of the next one |
| 66 AudioFloatArray m_lastOverlapBuffer; | 66 AudioFloatArray m_lastOverlapBuffer; |
| 67 }; | 67 }; |
| 68 | 68 |
| 69 } // namespace WebCore | 69 } // namespace WebCore |
| 70 | 70 |
| 71 #endif // FFTConvolver_h | 71 #endif // FFTConvolver_h |
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