| /* |
| * Copyright (C) 2010, Google Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND |
| * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE |
| * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
| * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
| * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH |
| * DAMAGE. |
| */ |
| |
| #ifndef THIRD_PARTY_BLINK_RENDERER_PLATFORM_AUDIO_EQUAL_POWER_PANNER_H_ |
| #define THIRD_PARTY_BLINK_RENDERER_PLATFORM_AUDIO_EQUAL_POWER_PANNER_H_ |
| |
| #include "third_party/blink/renderer/platform/audio/panner.h" |
| |
| namespace blink { |
| |
| // Common type of stereo panner as found in normal audio mixing equipment. |
| |
| class PLATFORM_EXPORT EqualPowerPanner final : public Panner { |
| public: |
| EqualPowerPanner(float sample_rate); |
| |
| void Pan(double azimuth, |
| double elevation, |
| const AudioBus* input_bus, |
| AudioBus* output_buf, |
| uint32_t frames_to_process, |
| AudioBus::ChannelInterpretation) override; |
| void PanWithSampleAccurateValues(double* azimuth, |
| double* elevation, |
| const AudioBus* input_bus, |
| AudioBus* output_bus, |
| uint32_t frames_to_process, |
| AudioBus::ChannelInterpretation) override; |
| |
| void Reset() override {} |
| |
| double TailTime() const override { return 0; } |
| double LatencyTime() const override { return 0; } |
| bool RequiresTailProcessing() const override { return false; } |
| |
| private: |
| void CalculateDesiredGain(double& desired_gain_l, |
| double& desired_gain_r, |
| double azimuth, |
| int number_of_channels); |
| }; |
| |
| } // namespace blink |
| |
| #endif // THIRD_PARTY_BLINK_RENDERER_PLATFORM_AUDIO_EQUAL_POWER_PANNER_H_ |