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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 * 1. Redistributions of source code must retain the above copyright | 7 * 1. Redistributions of source code must retain the above copyright |
| 8 * notice, this list of conditions and the following disclaimer. | 8 * notice, this list of conditions and the following disclaimer. |
| 9 * 2. Redistributions in binary form must reproduce the above copyright | 9 * 2. Redistributions in binary form must reproduce the above copyright |
| 10 * notice, this list of conditions and the following disclaimer in the | 10 * notice, this list of conditions and the following disclaimer in the |
| 11 * documentation and/or other materials provided with the distribution. | 11 * documentation and/or other materials provided with the distribution. |
| 12 * | 12 * |
| 13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND AN
Y | 13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND AN
Y |
| 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED | 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
| 15 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | 15 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| 16 * DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR AN
Y | 16 * DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR AN
Y |
| 17 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES | 17 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
| 18 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | 18 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| 19 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND O
N | 19 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND O
N |
| 20 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | 20 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | 21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| 22 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | 22 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 23 */ | 23 */ |
| 24 | 24 |
| 25 #include "modules/webaudio/AudioBufferSourceNode.h" | |
| 26 #include "bindings/core/v8/ExceptionMessages.h" | 25 #include "bindings/core/v8/ExceptionMessages.h" |
| 27 #include "bindings/core/v8/ExceptionState.h" | 26 #include "bindings/core/v8/ExceptionState.h" |
| 28 #include "core/dom/ExceptionCode.h" | 27 #include "core/dom/ExceptionCode.h" |
| 29 #include "core/frame/UseCounter.h" | 28 #include "core/frame/UseCounter.h" |
| 30 #include "modules/webaudio/AbstractAudioContext.h" | 29 #include "modules/webaudio/AbstractAudioContext.h" |
| 30 #include "modules/webaudio/AudioBufferSourceNode.h" |
| 31 #include "modules/webaudio/AudioNodeOutput.h" | 31 #include "modules/webaudio/AudioNodeOutput.h" |
| 32 #include "platform/FloatConversion.h" | 32 #include "platform/FloatConversion.h" |
| 33 #include "platform/audio/AudioUtilities.h" | 33 #include "platform/audio/AudioUtilities.h" |
| 34 #include "wtf/MathExtras.h" | 34 #include "wtf/MathExtras.h" |
| 35 #include "wtf/PtrUtil.h" |
| 35 #include <algorithm> | 36 #include <algorithm> |
| 36 | 37 |
| 37 namespace blink { | 38 namespace blink { |
| 38 | 39 |
| 39 const double DefaultGrainDuration = 0.020; // 20ms | 40 const double DefaultGrainDuration = 0.020; // 20ms |
| 40 | 41 |
| 41 // Arbitrary upper limit on playback rate. | 42 // Arbitrary upper limit on playback rate. |
| 42 // Higher than expected rates can be useful when playing back oversampled buffer
s | 43 // Higher than expected rates can be useful when playing back oversampled buffer
s |
| 43 // to minimize linear interpolation aliasing. | 44 // to minimize linear interpolation aliasing. |
| 44 const double MaxRate = 1024; | 45 const double MaxRate = 1024; |
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| 362 numberOfChannels, | 363 numberOfChannels, |
| 363 1u, | 364 1u, |
| 364 ExceptionMessages::InclusiveBound, | 365 ExceptionMessages::InclusiveBound, |
| 365 AbstractAudioContext::maxNumberOfChannels(), | 366 AbstractAudioContext::maxNumberOfChannels(), |
| 366 ExceptionMessages::InclusiveBound)); | 367 ExceptionMessages::InclusiveBound)); |
| 367 return; | 368 return; |
| 368 } | 369 } |
| 369 | 370 |
| 370 output(0).setNumberOfChannels(numberOfChannels); | 371 output(0).setNumberOfChannels(numberOfChannels); |
| 371 | 372 |
| 372 m_sourceChannels = adoptArrayPtr(new const float* [numberOfChannels]); | 373 m_sourceChannels = wrapArrayUnique(new const float* [numberOfChannels]); |
| 373 m_destinationChannels = adoptArrayPtr(new float* [numberOfChannels]); | 374 m_destinationChannels = wrapArrayUnique(new float* [numberOfChannels]); |
| 374 | 375 |
| 375 for (unsigned i = 0; i < numberOfChannels; ++i) | 376 for (unsigned i = 0; i < numberOfChannels; ++i) |
| 376 m_sourceChannels[i] = buffer->getChannelData(i)->data(); | 377 m_sourceChannels[i] = buffer->getChannelData(i)->data(); |
| 377 | 378 |
| 378 // If this is a grain (as set by a previous call to start()), validate t
he grain parameters | 379 // If this is a grain (as set by a previous call to start()), validate t
he grain parameters |
| 379 // now since it wasn't validated when start was called (because there wa
s no buffer then). | 380 // now since it wasn't validated when start was called (because there wa
s no buffer then). |
| 380 if (m_isGrain) | 381 if (m_isGrain) |
| 381 clampGrainParameters(buffer); | 382 clampGrainParameters(buffer); |
| 382 } | 383 } |
| 383 | 384 |
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| 683 { | 684 { |
| 684 audioBufferSourceHandler().start(when, grainOffset, exceptionState); | 685 audioBufferSourceHandler().start(when, grainOffset, exceptionState); |
| 685 } | 686 } |
| 686 | 687 |
| 687 void AudioBufferSourceNode::start(double when, double grainOffset, double grainD
uration, ExceptionState& exceptionState) | 688 void AudioBufferSourceNode::start(double when, double grainOffset, double grainD
uration, ExceptionState& exceptionState) |
| 688 { | 689 { |
| 689 audioBufferSourceHandler().start(when, grainOffset, grainDuration, exception
State); | 690 audioBufferSourceHandler().start(when, grainOffset, grainDuration, exception
State); |
| 690 } | 691 } |
| 691 | 692 |
| 692 } // namespace blink | 693 } // namespace blink |
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