125 lines
3.4 KiB
C
125 lines
3.4 KiB
C
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/*
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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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#ifndef WEBRTC_MODULES_AUDIO_PROCESSING_NS_MAIN_INTERFACE_NOISE_SUPPRESSION_H_
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#define WEBRTC_MODULES_AUDIO_PROCESSING_NS_MAIN_INTERFACE_NOISE_SUPPRESSION_H_
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#include "typedefs.h"
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typedef struct NsHandleT NsHandle;
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*
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* This function returns the version number of the code.
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*
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* Input:
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* - version : Pointer to a character array where the version
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* info is stored.
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* - length : Length of version.
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*
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* Return value : 0 - Ok
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* -1 - Error (probably length is not sufficient)
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*/
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int WebRtcNs_get_version(char *version, short length);
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/*
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* This function creates an instance to the noise reduction structure
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*
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* Input:
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* - NS_inst : Pointer to noise reduction instance that should be
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* created
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*
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* Output:
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* - NS_inst : Pointer to created noise reduction instance
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*
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* Return value : 0 - Ok
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* -1 - Error
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*/
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int WebRtcNs_Create(NsHandle **NS_inst);
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/*
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* This function frees the dynamic memory of a specified Noise Reduction
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* instance.
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*
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* Input:
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* - NS_inst : Pointer to NS instance that should be freed
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*
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* Return value : 0 - Ok
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* -1 - Error
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*/
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int WebRtcNs_Free(NsHandle *NS_inst);
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/*
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* This function initializes a NS instance
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*
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* Input:
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* - NS_inst : Instance that should be initialized
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* - fs : sampling frequency
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*
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* Output:
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* - NS_inst : Initialized instance
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*
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* Return value : 0 - Ok
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* -1 - Error
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*/
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int WebRtcNs_Init(NsHandle *NS_inst, WebRtc_UWord32 fs);
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/*
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* This changes the aggressiveness of the noise suppression method.
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*
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* Input:
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* - NS_inst : Instance that should be initialized
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* - mode : 0: Mild, 1: Medium , 2: Aggressive
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*
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* Output:
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* - NS_inst : Initialized instance
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*
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* Return value : 0 - Ok
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* -1 - Error
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*/
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int WebRtcNs_set_policy(NsHandle *NS_inst, int mode);
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/*
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* This functions does Noise Suppression for the inserted speech frame. The
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* input and output signals should always be 10ms (80 or 160 samples).
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*
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* Input
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* - NS_inst : VAD Instance. Needs to be initiated before call.
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* - spframe : Pointer to speech frame buffer for L band
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* - spframe_H : Pointer to speech frame buffer for H band
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* - fs : sampling frequency
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*
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* Output:
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* - NS_inst : Updated NS instance
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* - outframe : Pointer to output frame for L band
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* - outframe_H : Pointer to output frame for H band
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*
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* Return value : 0 - OK
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* -1 - Error
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*/
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int WebRtcNs_Process(NsHandle *NS_inst,
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short *spframe,
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short *spframe_H,
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short *outframe,
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short *outframe_H);
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#ifdef __cplusplus
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}
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#endif
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#endif // WEBRTC_MODULES_AUDIO_PROCESSING_NS_MAIN_INTERFACE_NOISE_SUPPRESSION_H_
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