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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 #ifndef EqualPowerPanner_h | 25 #ifndef EqualPowerPanner_h |
| 26 #define EqualPowerPanner_h | 26 #define EqualPowerPanner_h |
| 27 | 27 |
| 28 #include "Panner.h" | 28 #include "core/platform/audio/Panner.h" |
| 29 | 29 |
| 30 namespace WebCore { | 30 namespace WebCore { |
| 31 | 31 |
| 32 // Common type of stereo panner as found in normal audio mixing equipment. | 32 // Common type of stereo panner as found in normal audio mixing equipment. |
| 33 | 33 |
| 34 class EqualPowerPanner : public Panner { | 34 class EqualPowerPanner : public Panner { |
| 35 public: | 35 public: |
| 36 EqualPowerPanner(float sampleRate); | 36 EqualPowerPanner(float sampleRate); |
| 37 | 37 |
| 38 virtual void pan(double azimuth, double elevation, const AudioBus* inputBus,
AudioBus* outputBuf, size_t framesToProcess); | 38 virtual void pan(double azimuth, double elevation, const AudioBus* inputBus,
AudioBus* outputBuf, size_t framesToProcess); |
| 39 | 39 |
| 40 virtual void reset() { m_isFirstRender = true; } | 40 virtual void reset() { m_isFirstRender = true; } |
| 41 | 41 |
| 42 virtual double tailTime() const OVERRIDE { return 0; } | 42 virtual double tailTime() const OVERRIDE { return 0; } |
| 43 virtual double latencyTime() const OVERRIDE { return 0; } | 43 virtual double latencyTime() const OVERRIDE { return 0; } |
| 44 | 44 |
| 45 private: | 45 private: |
| 46 // For smoothing / de-zippering | 46 // For smoothing / de-zippering |
| 47 bool m_isFirstRender; | 47 bool m_isFirstRender; |
| 48 double m_smoothingConstant; | 48 double m_smoothingConstant; |
| 49 | 49 |
| 50 double m_gainL; | 50 double m_gainL; |
| 51 double m_gainR; | 51 double m_gainR; |
| 52 }; | 52 }; |
| 53 | 53 |
| 54 } // namespace WebCore | 54 } // namespace WebCore |
| 55 | 55 |
| 56 #endif // EqualPowerPanner_h | 56 #endif // EqualPowerPanner_h |
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