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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 * | 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 |
| (...skipping 10 matching lines...) Expand all Loading... |
| 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 "platform/audio/HRTFKernel.h" | 29 #include "platform/audio/HRTFKernel.h" |
| 30 | 30 |
| 31 #include <algorithm> |
| 32 #include <memory> |
| 31 #include "platform/audio/AudioChannel.h" | 33 #include "platform/audio/AudioChannel.h" |
| 32 #include "wtf/MathExtras.h" | 34 #include "wtf/MathExtras.h" |
| 33 #include "wtf/PtrUtil.h" | 35 #include "wtf/PtrUtil.h" |
| 34 #include <algorithm> | |
| 35 #include <memory> | |
| 36 | 36 |
| 37 namespace blink { | 37 namespace blink { |
| 38 | 38 |
| 39 // Takes the input AudioChannel as an input impulse response and calculates the | 39 // Takes the input AudioChannel as an input impulse response and calculates the |
| 40 // average group delay. This represents the initial delay before the most | 40 // average group delay. This represents the initial delay before the most |
| 41 // energetic part of the impulse response. The sample-frame delay is removed | 41 // energetic part of the impulse response. The sample-frame delay is removed |
| 42 // from the impulseP impulse response, and this value is returned. The length | 42 // from the impulseP impulse response, and this value is returned. The length |
| 43 // of the passed in AudioChannel must be a power of 2. | 43 // of the passed in AudioChannel must be a power of 2. |
| 44 static float extractAverageGroupDelay(AudioChannel* channel, | 44 static float extractAverageGroupDelay(AudioChannel* channel, |
| 45 size_t analysisFFTSize) { | 45 size_t analysisFFTSize) { |
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| 133 (1 - x) * kernel1->frameDelay() + x * kernel2->frameDelay(); | 133 (1 - x) * kernel1->frameDelay() + x * kernel2->frameDelay(); |
| 134 | 134 |
| 135 std::unique_ptr<FFTFrame> interpolatedFrame = | 135 std::unique_ptr<FFTFrame> interpolatedFrame = |
| 136 FFTFrame::createInterpolatedFrame(*kernel1->fftFrame(), | 136 FFTFrame::createInterpolatedFrame(*kernel1->fftFrame(), |
| 137 *kernel2->fftFrame(), x); | 137 *kernel2->fftFrame(), x); |
| 138 return HRTFKernel::create(std::move(interpolatedFrame), frameDelay, | 138 return HRTFKernel::create(std::move(interpolatedFrame), frameDelay, |
| 139 sampleRate1); | 139 sampleRate1); |
| 140 } | 140 } |
| 141 | 141 |
| 142 } // namespace blink | 142 } // namespace blink |
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