| OLD | NEW |
| 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 |
| 11 * notice, this list of conditions and the following disclaimer in the | 11 * notice, this list of conditions and the following disclaimer in the |
| 12 * documentation and/or other materials provided with the distribution. | 12 * documentation and/or other materials provided with the distribution. |
| 13 * | 13 * |
| 14 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY | 14 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY |
| 15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED | 15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
| 16 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | 16 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| 17 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY | 17 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY |
| 18 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES | 18 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
| 19 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | 19 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| 20 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND | 20 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| 21 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | 21 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF | 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| 23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | 23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 24 */ | 24 */ |
| 25 | 25 |
| 26 // FFTFrame implementation using FFmpeg's RDFT algorithm, | 26 // FFTFrame implementation using FFmpeg's RDFT algorithm, |
| 27 // suitable for use on Windows and Linux. | 27 // suitable for use on Windows and Linux. |
| 28 | 28 |
| 29 #include "wtf/build_config.h" | 29 #include "platform/wtf/build_config.h" |
| 30 | 30 |
| 31 #if USE(WEBAUDIO_FFMPEG) | 31 #if USE(WEBAUDIO_FFMPEG) |
| 32 | 32 |
| 33 #include "platform/audio/FFTFrame.h" | 33 #include "platform/audio/FFTFrame.h" |
| 34 | 34 |
| 35 #include "platform/audio/VectorMath.h" | 35 #include "platform/audio/VectorMath.h" |
| 36 | 36 |
| 37 extern "C" { | 37 extern "C" { |
| 38 #include <libavcodec/avfft.h> | 38 #include <libavcodec/avfft.h> |
| 39 } | 39 } |
| 40 | 40 |
| 41 #include "wtf/MathExtras.h" | 41 #include "platform/wtf/MathExtras.h" |
| 42 | 42 |
| 43 namespace blink { | 43 namespace blink { |
| 44 | 44 |
| 45 #if DCHECK_IS_ON() | 45 #if DCHECK_IS_ON() |
| 46 // Max FFT size for FFMPEG. WebAudio currently only uses FFTs up to size 15 | 46 // Max FFT size for FFMPEG. WebAudio currently only uses FFTs up to size 15 |
| 47 // (2^15 points). | 47 // (2^15 points). |
| 48 const int kMaxFFTPow2Size = 16; | 48 const int kMaxFFTPow2Size = 16; |
| 49 #endif | 49 #endif |
| 50 | 50 |
| 51 // Normal constructor: allocates for a given fftSize. | 51 // Normal constructor: allocates for a given fftSize. |
| (...skipping 107 matching lines...) Expand 10 before | Expand all | Expand 10 after Loading... |
| 159 int pow2size = static_cast<int>(log2(fftSize)); | 159 int pow2size = static_cast<int>(log2(fftSize)); |
| 160 ASSERT(pow2size < kMaxFFTPow2Size); | 160 ASSERT(pow2size < kMaxFFTPow2Size); |
| 161 | 161 |
| 162 RDFTContext* context = av_rdft_init(pow2size, (RDFTransformType)trans); | 162 RDFTContext* context = av_rdft_init(pow2size, (RDFTransformType)trans); |
| 163 return context; | 163 return context; |
| 164 } | 164 } |
| 165 | 165 |
| 166 } // namespace blink | 166 } // namespace blink |
| 167 | 167 |
| 168 #endif // USE(WEBAUDIO_FFMPEG) | 168 #endif // USE(WEBAUDIO_FFMPEG) |
| OLD | NEW |