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/*
Copyright 2018 Google Inc. All Rights Reserved.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS-IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
#ifndef RESONANCE_AUDIO_UTILS_SUM_AND_DIFFERENCE_PROCESSOR_H_
#define RESONANCE_AUDIO_UTILS_SUM_AND_DIFFERENCE_PROCESSOR_H_
#include "base/audio_buffer.h"
namespace vraudio {
// Class which converts a 2-channel input audio buffer into its sum and
// difference signals and stores them in the left and right channel
// respectively.
class SumAndDifferenceProcessor {
public:
// Constructs a stereo sum and difference processor.
//
// @param num_frames Number of frames in the stereo input audio buffer.
explicit SumAndDifferenceProcessor(size_t num_frames);
// Converts a 2-channel buffer signals into their sum and difference.
void Process(AudioBuffer* stereo_buffer);
private:
// Temporary audio buffer to store left channel input data during conversion.
AudioBuffer temp_buffer_;
};
} // namespace vraudio
#endif // RESONANCE_AUDIO_UTILS_SUM_AND_DIFFERENCE_PROCESSOR_H_
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