34 lines
986 B
C
34 lines
986 B
C
/*
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* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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/*
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* This function mutes a signal linearly on a sample by sample basis.
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*/
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#include "dsp_helpfunctions.h"
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#include "signal_processing_library.h"
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void WebRtcNetEQ_MuteSignal(WebRtc_Word16 *pw16_inout, WebRtc_Word16 muteSlope,
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WebRtc_Word16 N)
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{
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int i;
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WebRtc_Word32 w32_tmp = 1048608; /* (16384<<6 + 32) */
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for (i = 0; i < N; i++)
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{
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pw16_inout[i]
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= (WebRtc_Word16) ((WEBRTC_SPL_MUL_16_16((WebRtc_Word16)(w32_tmp>>6), pw16_inout[i])
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+ 8192) >> 14);
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w32_tmp -= muteSlope;
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}
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}
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