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Diffstat (limited to 'src/modules/audio_processing/ns/main/interface/noise_suppression.h')
-rw-r--r-- | src/modules/audio_processing/ns/main/interface/noise_suppression.h | 124 |
1 files changed, 124 insertions, 0 deletions
diff --git a/src/modules/audio_processing/ns/main/interface/noise_suppression.h b/src/modules/audio_processing/ns/main/interface/noise_suppression.h new file mode 100644 index 0000000000..b8983b077d --- /dev/null +++ b/src/modules/audio_processing/ns/main/interface/noise_suppression.h @@ -0,0 +1,124 @@ +/* + * 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_H_ +#define WEBRTC_MODULES_AUDIO_PROCESSING_NS_MAIN_INTERFACE_NOISE_SUPPRESSION_H_ + +#include "typedefs.h" + +typedef struct NsHandleT NsHandle; + +#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 WebRtcNs_get_version(char *version, short length); + + +/* + * This function creates an instance to the noise reduction structure + * + * Input: + * - NS_inst : Pointer to noise reduction instance that should be + * created + * + * Output: + * - NS_inst : Pointer to created noise reduction instance + * + * Return value : 0 - Ok + * -1 - Error + */ +int WebRtcNs_Create(NsHandle **NS_inst); + + +/* + * This function frees the dynamic memory of a specified Noise Reduction + * instance. + * + * Input: + * - NS_inst : Pointer to NS instance that should be freed + * + * Return value : 0 - Ok + * -1 - Error + */ +int WebRtcNs_Free(NsHandle *NS_inst); + + +/* + * This function initializes a NS instance + * + * Input: + * - NS_inst : Instance that should be initialized + * - fs : sampling frequency + * + * Output: + * - NS_inst : Initialized instance + * + * Return value : 0 - Ok + * -1 - Error + */ +int WebRtcNs_Init(NsHandle *NS_inst, WebRtc_UWord32 fs); + +/* + * This changes the aggressiveness of the noise suppression method. + * + * Input: + * - NS_inst : Instance that should be initialized + * - mode : 0: Mild, 1: Medium , 2: Aggressive + * + * Output: + * - NS_inst : Initialized instance + * + * Return value : 0 - Ok + * -1 - Error + */ +int WebRtcNs_set_policy(NsHandle *NS_inst, 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 + * - NS_inst : VAD Instance. Needs to be initiated before call. + * - spframe : Pointer to speech frame buffer for L band + * - spframe_H : Pointer to speech frame buffer for H band + * - fs : sampling frequency + * + * Output: + * - NS_inst : Updated NS instance + * - outframe : Pointer to output frame for L band + * - outframe_H : Pointer to output frame for H band + * + * Return value : 0 - OK + * -1 - Error + */ +int WebRtcNs_Process(NsHandle *NS_inst, + short *spframe, + short *spframe_H, + short *outframe, + short *outframe_H); + +#ifdef __cplusplus +} +#endif + +#endif // WEBRTC_MODULES_AUDIO_PROCESSING_NS_MAIN_INTERFACE_NOISE_SUPPRESSION_H_ |