| OLD | NEW |
| 1 /* | 1 /* |
| 2 * Copyright (C) 2012 Google Inc. All rights reserved. | 2 * Copyright (C) 2012 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 * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of | 13 * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of |
| 14 * its contributors may be used to endorse or promote products derived | 14 * its contributors may be used to endorse or promote products derived |
| 15 * from this software without specific prior written permission. | 15 * from this software without specific prior written permission. |
| 16 * | 16 * |
| 17 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY | 17 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY |
| 18 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED | 18 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
| 19 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | 19 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| 20 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY | 20 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY |
| 21 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES | 21 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
| 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 #include "modules/webaudio/PeriodicWave.h" | |
| 30 #include "bindings/core/v8/ExceptionMessages.h" | 29 #include "bindings/core/v8/ExceptionMessages.h" |
| 31 #include "bindings/core/v8/ExceptionState.h" | 30 #include "bindings/core/v8/ExceptionState.h" |
| 32 #include "core/dom/ExceptionCode.h" | 31 #include "core/dom/ExceptionCode.h" |
| 33 #include "modules/webaudio/AbstractAudioContext.h" | 32 #include "modules/webaudio/AbstractAudioContext.h" |
| 34 #include "modules/webaudio/OscillatorNode.h" | 33 #include "modules/webaudio/OscillatorNode.h" |
| 34 #include "modules/webaudio/PeriodicWave.h" |
| 35 #include "platform/audio/FFTFrame.h" | 35 #include "platform/audio/FFTFrame.h" |
| 36 #include "platform/audio/VectorMath.h" | 36 #include "platform/audio/VectorMath.h" |
| 37 #include "wtf/PtrUtil.h" |
| 37 #include <algorithm> | 38 #include <algorithm> |
| 39 #include <memory> |
| 38 | 40 |
| 39 namespace blink { | 41 namespace blink { |
| 40 | 42 |
| 41 // The number of bands per octave. Each octave will have this many entries in t
he wave tables. | 43 // The number of bands per octave. Each octave will have this many entries in t
he wave tables. |
| 42 const unsigned kNumberOfOctaveBands = 3; | 44 const unsigned kNumberOfOctaveBands = 3; |
| 43 | 45 |
| 44 // The max length of a periodic wave. This must be a power of two greater than o
r equal to 2048 and | 46 // The max length of a periodic wave. This must be a power of two greater than o
r equal to 2048 and |
| 45 // must be supported by the FFT routines. | 47 // must be supported by the FFT routines. |
| 46 const unsigned kMaxPeriodicWaveSize = 16384; | 48 const unsigned kMaxPeriodicWaveSize = 16384; |
| 47 | 49 |
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| 235 realP[i] = 0; | 237 realP[i] = 0; |
| 236 imagP[i] = 0; | 238 imagP[i] = 0; |
| 237 } | 239 } |
| 238 | 240 |
| 239 // Clear packed-nyquist and any DC-offset. | 241 // Clear packed-nyquist and any DC-offset. |
| 240 realP[0] = 0; | 242 realP[0] = 0; |
| 241 imagP[0] = 0; | 243 imagP[0] = 0; |
| 242 | 244 |
| 243 // Create the band-limited table. | 245 // Create the band-limited table. |
| 244 unsigned waveSize = periodicWaveSize(); | 246 unsigned waveSize = periodicWaveSize(); |
| 245 OwnPtr<AudioFloatArray> table = adoptPtr(new AudioFloatArray(waveSize)); | 247 std::unique_ptr<AudioFloatArray> table = wrapUnique(new AudioFloatArray(
waveSize)); |
| 246 adjustV8ExternalMemory(waveSize * sizeof(float)); | 248 adjustV8ExternalMemory(waveSize * sizeof(float)); |
| 247 m_bandLimitedTables.append(std::move(table)); | 249 m_bandLimitedTables.append(std::move(table)); |
| 248 | 250 |
| 249 // Apply an inverse FFT to generate the time-domain table data. | 251 // Apply an inverse FFT to generate the time-domain table data. |
| 250 float* data = m_bandLimitedTables[rangeIndex]->data(); | 252 float* data = m_bandLimitedTables[rangeIndex]->data(); |
| 251 frame.doInverseFFT(data); | 253 frame.doInverseFFT(data); |
| 252 | 254 |
| 253 // For the first range (which has the highest power), calculate its peak
value then compute normalization scale. | 255 // For the first range (which has the highest power), calculate its peak
value then compute normalization scale. |
| 254 if (!disableNormalization) { | 256 if (!disableNormalization) { |
| 255 if (!rangeIndex) { | 257 if (!rangeIndex) { |
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| 342 | 344 |
| 343 realP[n] = 0; | 345 realP[n] = 0; |
| 344 imagP[n] = b; | 346 imagP[n] = b; |
| 345 } | 347 } |
| 346 | 348 |
| 347 createBandLimitedTables(realP, imagP, halfSize, false); | 349 createBandLimitedTables(realP, imagP, halfSize, false); |
| 348 } | 350 } |
| 349 | 351 |
| 350 } // namespace blink | 352 } // namespace blink |
| 351 | 353 |
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