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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" |
29 #include "bindings/core/v8/ExceptionMessages.h" | 30 #include "bindings/core/v8/ExceptionMessages.h" |
30 #include "bindings/core/v8/ExceptionState.h" | 31 #include "bindings/core/v8/ExceptionState.h" |
31 #include "core/dom/ExceptionCode.h" | 32 #include "core/dom/ExceptionCode.h" |
32 #include "modules/webaudio/AbstractAudioContext.h" | 33 #include "modules/webaudio/AbstractAudioContext.h" |
33 #include "modules/webaudio/OscillatorNode.h" | 34 #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" | |
38 #include <algorithm> | 37 #include <algorithm> |
39 #include <memory> | |
40 | 38 |
41 namespace blink { | 39 namespace blink { |
42 | 40 |
43 // The number of bands per octave. Each octave will have this many entries in t
he wave tables. | 41 // The number of bands per octave. Each octave will have this many entries in t
he wave tables. |
44 const unsigned kNumberOfOctaveBands = 3; | 42 const unsigned kNumberOfOctaveBands = 3; |
45 | 43 |
46 // The max length of a periodic wave. This must be a power of two greater than o
r equal to 2048 and | 44 // The max length of a periodic wave. This must be a power of two greater than o
r equal to 2048 and |
47 // must be supported by the FFT routines. | 45 // must be supported by the FFT routines. |
48 const unsigned kMaxPeriodicWaveSize = 16384; | 46 const unsigned kMaxPeriodicWaveSize = 16384; |
49 | 47 |
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237 realP[i] = 0; | 235 realP[i] = 0; |
238 imagP[i] = 0; | 236 imagP[i] = 0; |
239 } | 237 } |
240 | 238 |
241 // Clear packed-nyquist and any DC-offset. | 239 // Clear packed-nyquist and any DC-offset. |
242 realP[0] = 0; | 240 realP[0] = 0; |
243 imagP[0] = 0; | 241 imagP[0] = 0; |
244 | 242 |
245 // Create the band-limited table. | 243 // Create the band-limited table. |
246 unsigned waveSize = periodicWaveSize(); | 244 unsigned waveSize = periodicWaveSize(); |
247 std::unique_ptr<AudioFloatArray> table = wrapUnique(new AudioFloatArray(
waveSize)); | 245 OwnPtr<AudioFloatArray> table = adoptPtr(new AudioFloatArray(waveSize)); |
248 adjustV8ExternalMemory(waveSize * sizeof(float)); | 246 adjustV8ExternalMemory(waveSize * sizeof(float)); |
249 m_bandLimitedTables.append(std::move(table)); | 247 m_bandLimitedTables.append(std::move(table)); |
250 | 248 |
251 // Apply an inverse FFT to generate the time-domain table data. | 249 // Apply an inverse FFT to generate the time-domain table data. |
252 float* data = m_bandLimitedTables[rangeIndex]->data(); | 250 float* data = m_bandLimitedTables[rangeIndex]->data(); |
253 frame.doInverseFFT(data); | 251 frame.doInverseFFT(data); |
254 | 252 |
255 // For the first range (which has the highest power), calculate its peak
value then compute normalization scale. | 253 // For the first range (which has the highest power), calculate its peak
value then compute normalization scale. |
256 if (!disableNormalization) { | 254 if (!disableNormalization) { |
257 if (!rangeIndex) { | 255 if (!rangeIndex) { |
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344 | 342 |
345 realP[n] = 0; | 343 realP[n] = 0; |
346 imagP[n] = b; | 344 imagP[n] = b; |
347 } | 345 } |
348 | 346 |
349 createBandLimitedTables(realP, imagP, halfSize, false); | 347 createBandLimitedTables(realP, imagP, halfSize, false); |
350 } | 348 } |
351 | 349 |
352 } // namespace blink | 350 } // namespace blink |
353 | 351 |
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