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/*
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#ifndef WEBRTC_MODULES_AUDIO_PROCESSING_NS_MAIN_INTERFACE_NOISE_SUPPRESSION_X_H_
#define WEBRTC_MODULES_AUDIO_PROCESSING_NS_MAIN_INTERFACE_NOISE_SUPPRESSION_X_H_
#include "signal_processing_library.h"
typedef struct NsxHandleT NsxHandle;
#ifdef __cplusplus
extern "C" {
#endif
/*
* This function returns the version number of the code.
*
* Input:
* - version : Pointer to a character array where the version
* info is stored.
* - length : Length of version.
*
* Return value : 0 - Ok
* -1 - Error (probably length is not sufficient)
*/
int WebRtcNsx_get_version(char *version, short length);
/*
* This function creates an instance to the noise reduction structure
*
* Input:
* - nsxInst : Pointer to noise reduction instance that should be
* created
*
* Output:
* - nsxInst : Pointer to created noise reduction instance
*
* Return value : 0 - Ok
* -1 - Error
*/
int WebRtcNsx_Create(NsxHandle **nsxInst);
/*
* This function frees the dynamic memory of a specified Noise Suppression
* instance.
*
* Input:
* - nsxInst : Pointer to NS instance that should be freed
*
* Return value : 0 - Ok
* -1 - Error
*/
int WebRtcNsx_Free(NsxHandle *nsxInst);
/*
* This function initializes a NS instance
*
* Input:
* - nsxInst : Instance that should be initialized
* - fs : sampling frequency
*
* Output:
* - nsxInst : Initialized instance
*
* Return value : 0 - Ok
* -1 - Error
*/
int WebRtcNsx_Init(NsxHandle *nsxInst, WebRtc_UWord32 fs);
/*
* This changes the aggressiveness of the noise suppression method.
*
* Input:
* - nsxInst : Instance that should be initialized
* - mode : 0: Mild, 1: Medium , 2: Aggressive
*
* Output:
* - nsxInst : Initialized instance
*
* Return value : 0 - Ok
* -1 - Error
*/
int WebRtcNsx_set_policy(NsxHandle *nsxInst, int mode);
/*
* This functions does noise suppression for the inserted speech frame. The
* input and output signals should always be 10ms (80 or 160 samples).
*
* Input
* - nsxInst : NSx instance. Needs to be initiated before call.
* - speechFrame : Pointer to speech frame buffer for L band
* - speechFrameHB : Pointer to speech frame buffer for H band
* - fs : sampling frequency
*
* Output:
* - nsxInst : Updated NSx instance
* - outFrame : Pointer to output frame for L band
* - outFrameHB : Pointer to output frame for H band
*
* Return value : 0 - OK
* -1 - Error
*/
int WebRtcNsx_Process(NsxHandle *nsxInst,
short *speechFrame,
short *speechFrameHB,
short *outFrame,
short *outFrameHB);
#ifdef __cplusplus
}
#endif
#endif // WEBRTC_MODULES_AUDIO_PROCESSING_NS_MAIN_INTERFACE_NOISE_SUPPRESSION_X_H_
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