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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 |
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| 292 | 292 |
| 293 // Clear packed-nyquist and any DC-offset. | 293 // Clear packed-nyquist and any DC-offset. |
| 294 realP[0] = 0; | 294 realP[0] = 0; |
| 295 imagP[0] = 0; | 295 imagP[0] = 0; |
| 296 | 296 |
| 297 // Create the band-limited table. | 297 // Create the band-limited table. |
| 298 unsigned waveSize = periodicWaveSize(); | 298 unsigned waveSize = periodicWaveSize(); |
| 299 std::unique_ptr<AudioFloatArray> table = | 299 std::unique_ptr<AudioFloatArray> table = |
| 300 WTF::makeUnique<AudioFloatArray>(waveSize); | 300 WTF::makeUnique<AudioFloatArray>(waveSize); |
| 301 adjustV8ExternalMemory(waveSize * sizeof(float)); | 301 adjustV8ExternalMemory(waveSize * sizeof(float)); |
| 302 m_bandLimitedTables.append(std::move(table)); | 302 m_bandLimitedTables.push_back(std::move(table)); |
| 303 | 303 |
| 304 // Apply an inverse FFT to generate the time-domain table data. | 304 // Apply an inverse FFT to generate the time-domain table data. |
| 305 float* data = m_bandLimitedTables[rangeIndex]->data(); | 305 float* data = m_bandLimitedTables[rangeIndex]->data(); |
| 306 frame.doInverseFFT(data); | 306 frame.doInverseFFT(data); |
| 307 | 307 |
| 308 // For the first range (which has the highest power), calculate its peak | 308 // For the first range (which has the highest power), calculate its peak |
| 309 // value then compute normalization scale. | 309 // value then compute normalization scale. |
| 310 if (!disableNormalization) { | 310 if (!disableNormalization) { |
| 311 if (!rangeIndex) { | 311 if (!rangeIndex) { |
| 312 float maxValue; | 312 float maxValue; |
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| 397 } | 397 } |
| 398 | 398 |
| 399 realP[n] = 0; | 399 realP[n] = 0; |
| 400 imagP[n] = b; | 400 imagP[n] = b; |
| 401 } | 401 } |
| 402 | 402 |
| 403 createBandLimitedTables(realP, imagP, halfSize, false); | 403 createBandLimitedTables(realP, imagP, halfSize, false); |
| 404 } | 404 } |
| 405 | 405 |
| 406 } // namespace blink | 406 } // namespace blink |
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