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/*
* Copyright (c) 2012 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_NOISE_SUPPRESSION_X_H_
#define WEBRTC_MODULES_AUDIO_PROCESSING_NS_NOISE_SUPPRESSION_X_H_
#include "webrtc/typedefs.h"
typedef struct NsxHandleT NsxHandle;
#ifdef __cplusplus
extern "C" {
#endif
/*
* This function creates an instance of the fixed point Noise Suppression.
*/
NsxHandle* WebRtcNsx_Create();
/*
* This function frees the dynamic memory of a specified Noise Suppression
* instance.
*
* Input:
* - nsxInst : Pointer to NS instance that should be freed
*/
void 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, uint32_t 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 each band
* - num_bands : Number of bands
*
* Output:
* - nsxInst : Updated NSx instance
* - outFrame : Pointer to output frame for each band
*/
void WebRtcNsx_Process(NsxHandle* nsxInst,
const short* const* speechFrame,
int num_bands,
short* const* outFrame);
#ifdef __cplusplus
}
#endif
#endif // WEBRTC_MODULES_AUDIO_PROCESSING_NS_NOISE_SUPPRESSION_X_H_
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