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Diffstat (limited to 'src/modules/audio_processing/ns/main/source/nsx_core.h')
| -rw-r--r-- | src/modules/audio_processing/ns/main/source/nsx_core.h | 169 |
1 files changed, 169 insertions, 0 deletions
diff --git a/src/modules/audio_processing/ns/main/source/nsx_core.h b/src/modules/audio_processing/ns/main/source/nsx_core.h new file mode 100644 index 0000000000..2e74303505 --- /dev/null +++ b/src/modules/audio_processing/ns/main/source/nsx_core.h @@ -0,0 +1,169 @@ +/* + * 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_SOURCE_NSX_CORE_H_ +#define WEBRTC_MODULES_AUDIO_PROCESSING_NS_MAIN_SOURCE_NSX_CORE_H_ + +#include "typedefs.h" +#include "signal_processing_library.h" + +#include "nsx_defines.h" + +#ifdef NS_FILEDEBUG +#include <stdio.h> +#endif + +typedef struct NsxInst_t_ +{ + WebRtc_UWord32 fs; + + const WebRtc_Word16* window; + WebRtc_Word16 analysisBuffer[ANAL_BLOCKL_MAX]; + WebRtc_Word16 synthesisBuffer[ANAL_BLOCKL_MAX]; + WebRtc_UWord16 noiseSupFilter[HALF_ANAL_BLOCKL]; + WebRtc_UWord16 overdrive; /* Q8 */ + WebRtc_UWord16 denoiseBound; /* Q14 */ + const WebRtc_Word16* factor2Table; + WebRtc_Word16 noiseEstLogQuantile[SIMULT * HALF_ANAL_BLOCKL]; + WebRtc_Word16 noiseEstDensity[SIMULT * HALF_ANAL_BLOCKL]; + WebRtc_Word16 noiseEstCounter[SIMULT]; + WebRtc_Word16 noiseEstQuantile[HALF_ANAL_BLOCKL]; + + WebRtc_Word16 anaLen; + int anaLen2; + int magnLen; + int aggrMode; + int stages; + int initFlag; + int gainMap; + + WebRtc_Word32 maxLrt; + WebRtc_Word32 minLrt; + WebRtc_Word32 logLrtTimeAvgW32[HALF_ANAL_BLOCKL]; //log lrt factor with time-smoothing in Q8 + WebRtc_Word32 featureLogLrt; + WebRtc_Word32 thresholdLogLrt; + WebRtc_Word16 weightLogLrt; + + WebRtc_UWord32 featureSpecDiff; + WebRtc_UWord32 thresholdSpecDiff; + WebRtc_Word16 weightSpecDiff; + + WebRtc_UWord32 featureSpecFlat; + WebRtc_UWord32 thresholdSpecFlat; + WebRtc_Word16 weightSpecFlat; + + WebRtc_Word32 avgMagnPause[HALF_ANAL_BLOCKL]; //conservative estimate of noise spectrum + WebRtc_UWord32 magnEnergy; + WebRtc_UWord32 sumMagn; + WebRtc_UWord32 curAvgMagnEnergy; + WebRtc_UWord32 timeAvgMagnEnergy; + WebRtc_UWord32 timeAvgMagnEnergyTmp; + + WebRtc_UWord32 whiteNoiseLevel; //initial noise estimate + WebRtc_UWord32 initMagnEst[HALF_ANAL_BLOCKL];//initial magnitude spectrum estimate + WebRtc_Word32 pinkNoiseNumerator; //pink noise parameter: numerator + WebRtc_Word32 pinkNoiseExp; //pink noise parameter: power of freq + int minNorm; //smallest normalization factor + int zeroInputSignal; //zero input signal flag + + WebRtc_UWord32 prevNoiseU32[HALF_ANAL_BLOCKL]; //noise spectrum from previous frame + WebRtc_UWord16 prevMagnU16[HALF_ANAL_BLOCKL]; //magnitude spectrum from previous frame + WebRtc_Word16 priorNonSpeechProb; //prior speech/noise probability // Q14 + + int blockIndex; //frame index counter + int modelUpdate; //parameter for updating or estimating thresholds/weights for prior model + int cntThresUpdate; + + //histograms for parameter estimation + WebRtc_Word16 histLrt[HIST_PAR_EST]; + WebRtc_Word16 histSpecFlat[HIST_PAR_EST]; + WebRtc_Word16 histSpecDiff[HIST_PAR_EST]; + + //quantities for high band estimate + WebRtc_Word16 dataBufHBFX[ANAL_BLOCKL_MAX]; /* Q0 */ + + int qNoise; + int prevQNoise; + int prevQMagn; + int blockLen10ms; + + WebRtc_Word16 real[ANAL_BLOCKL_MAX]; + WebRtc_Word16 imag[ANAL_BLOCKL_MAX]; + WebRtc_Word32 energyIn; + int scaleEnergyIn; + int normData; + +} NsxInst_t; + +#ifdef __cplusplus +extern "C" +{ +#endif + +/**************************************************************************** + * WebRtcNsx_InitCore(...) + * + * This function initializes a noise suppression instance + * + * Input: + * - inst : Instance that should be initialized + * - fs : Sampling frequency + * + * Output: + * - inst : Initialized instance + * + * Return value : 0 - Ok + * -1 - Error + */ +WebRtc_Word32 WebRtcNsx_InitCore(NsxInst_t *inst, WebRtc_UWord32 fs); + +/**************************************************************************** + * WebRtcNsx_set_policy_core(...) + * + * This changes the aggressiveness of the noise suppression method. + * + * Input: + * - inst : Instance that should be initialized + * - mode : 0: Mild (6 dB), 1: Medium (10 dB), 2: Aggressive (15 dB) + * + * Output: + * - NS_inst : Initialized instance + * + * Return value : 0 - Ok + * -1 - Error + */ +int WebRtcNsx_set_policy_core(NsxInst_t *inst, int mode); + +/**************************************************************************** + * WebRtcNsx_ProcessCore + * + * Do noise suppression. + * + * Input: + * - inst : Instance that should be initialized + * - inFrameLow : Input speech frame for lower band + * - inFrameHigh : Input speech frame for higher band + * + * Output: + * - inst : Updated instance + * - outFrameLow : Output speech frame for lower band + * - outFrameHigh : Output speech frame for higher band + * + * Return value : 0 - OK + * -1 - Error + */ +int WebRtcNsx_ProcessCore(NsxInst_t *inst, short *inFrameLow, short *inFrameHigh, + short *outFrameLow, short *outFrameHigh); + +#ifdef __cplusplus +} +#endif + +#endif // WEBRTC_MODULES_AUDIO_PROCESSING_NS_MAIN_SOURCE_NSX_CORE_H_ |