59 lines
1.3 KiB
C
59 lines
1.3 KiB
C
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/*
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* Copyrightm (C) 2010 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef __ECHO_SUPPRESSOR_H__
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#define __ECHO_SUPPRESSOR_H__
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#include <stdint.h>
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class EchoSuppressor
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{
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public:
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// The sampleCount must be power of 2.
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EchoSuppressor(int sampleCount, int tailLength);
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~EchoSuppressor();
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void run(int16_t *playbacked, int16_t *recorded);
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private:
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int mShift;
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int mScale;
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int mSampleCount;
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int mWindowSize;
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int mTailLength;
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int mRecordLength;
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int mRecordOffset;
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uint16_t *mXs;
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uint32_t *mXSums;
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uint32_t *mX2Sums;
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uint16_t *mXRecords;
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uint32_t mYSum;
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uint32_t mY2Sum;
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uint32_t *mYRecords;
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uint32_t *mY2Records;
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uint32_t *mXYSums;
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uint32_t *mXYRecords;
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int32_t mLastX;
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int32_t mLastY;
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float mWeight;
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};
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#endif
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