diff options
Diffstat (limited to 'webrtc/modules/audio_processing/ns/nsx_core_c.c')
| -rw-r--r-- | webrtc/modules/audio_processing/ns/nsx_core_c.c | 261 |
1 files changed, 0 insertions, 261 deletions
diff --git a/webrtc/modules/audio_processing/ns/nsx_core_c.c b/webrtc/modules/audio_processing/ns/nsx_core_c.c deleted file mode 100644 index 14322d3..0000000 --- a/webrtc/modules/audio_processing/ns/nsx_core_c.c +++ /dev/null @@ -1,261 +0,0 @@ -/* - * Copyright (c) 2013 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. - */ - -#include <assert.h> - -#include "webrtc/modules/audio_processing/ns/include/noise_suppression_x.h" -#include "webrtc/modules/audio_processing/ns/nsx_core.h" -#include "webrtc/modules/audio_processing/ns/nsx_defines.h" - -static const int16_t kIndicatorTable[17] = { - 0, 2017, 3809, 5227, 6258, 6963, 7424, 7718, - 7901, 8014, 8084, 8126, 8152, 8168, 8177, 8183, 8187 -}; - -// Compute speech/noise probability -// speech/noise probability is returned in: probSpeechFinal -//snrLocPrior is the prior SNR for each frequency (in Q11) -//snrLocPost is the post SNR for each frequency (in Q11) -void WebRtcNsx_SpeechNoiseProb(NoiseSuppressionFixedC* inst, - uint16_t* nonSpeechProbFinal, - uint32_t* priorLocSnr, - uint32_t* postLocSnr) { - uint32_t zeros, num, den, tmpU32no1, tmpU32no2, tmpU32no3; - int32_t invLrtFX, indPriorFX, tmp32, tmp32no1, tmp32no2, besselTmpFX32; - int32_t frac32, logTmp; - int32_t logLrtTimeAvgKsumFX; - int16_t indPriorFX16; - int16_t tmp16, tmp16no1, tmp16no2, tmpIndFX, tableIndex, frac, intPart; - size_t i; - int normTmp, normTmp2, nShifts; - - // compute feature based on average LR factor - // this is the average over all frequencies of the smooth log LRT - logLrtTimeAvgKsumFX = 0; - for (i = 0; i < inst->magnLen; i++) { - besselTmpFX32 = (int32_t)postLocSnr[i]; // Q11 - normTmp = WebRtcSpl_NormU32(postLocSnr[i]); - num = postLocSnr[i] << normTmp; // Q(11+normTmp) - if (normTmp > 10) { - den = priorLocSnr[i] << (normTmp - 11); // Q(normTmp) - } else { - den = priorLocSnr[i] >> (11 - normTmp); // Q(normTmp) - } - if (den > 0) { - besselTmpFX32 -= num / den; // Q11 - } else { - besselTmpFX32 = 0; - } - - // inst->logLrtTimeAvg[i] += LRT_TAVG * (besselTmp - log(snrLocPrior) - // - inst->logLrtTimeAvg[i]); - // Here, LRT_TAVG = 0.5 - zeros = WebRtcSpl_NormU32(priorLocSnr[i]); - frac32 = (int32_t)(((priorLocSnr[i] << zeros) & 0x7FFFFFFF) >> 19); - tmp32 = (frac32 * frac32 * -43) >> 19; - tmp32 += ((int16_t)frac32 * 5412) >> 12; - frac32 = tmp32 + 37; - // tmp32 = log2(priorLocSnr[i]) - tmp32 = (int32_t)(((31 - zeros) << 12) + frac32) - (11 << 12); // Q12 - logTmp = (tmp32 * 178) >> 8; // log2(priorLocSnr[i])*log(2) - // tmp32no1 = LRT_TAVG * (log(snrLocPrior) + inst->logLrtTimeAvg[i]) in Q12. - tmp32no1 = (logTmp + inst->logLrtTimeAvgW32[i]) / 2; - inst->logLrtTimeAvgW32[i] += (besselTmpFX32 - tmp32no1); // Q12 - - logLrtTimeAvgKsumFX += inst->logLrtTimeAvgW32[i]; // Q12 - } - inst->featureLogLrt = (logLrtTimeAvgKsumFX * BIN_SIZE_LRT) >> - (inst->stages + 11); - - // done with computation of LR factor - - // - //compute the indicator functions - // - - // average LRT feature - // FLOAT code - // indicator0 = 0.5 * (tanh(widthPrior * - // (logLrtTimeAvgKsum - threshPrior0)) + 1.0); - tmpIndFX = 16384; // Q14(1.0) - tmp32no1 = logLrtTimeAvgKsumFX - inst->thresholdLogLrt; // Q12 - nShifts = 7 - inst->stages; // WIDTH_PR_MAP_SHIFT - inst->stages + 5; - //use larger width in tanh map for pause regions - if (tmp32no1 < 0) { - tmpIndFX = 0; - tmp32no1 = -tmp32no1; - //widthPrior = widthPrior * 2.0; - nShifts++; - } - tmp32no1 = WEBRTC_SPL_SHIFT_W32(tmp32no1, nShifts); // Q14 - // compute indicator function: sigmoid map - tableIndex = (int16_t)(tmp32no1 >> 14); - if ((tableIndex < 16) && (tableIndex >= 0)) { - tmp16no2 = kIndicatorTable[tableIndex]; - tmp16no1 = kIndicatorTable[tableIndex + 1] - kIndicatorTable[tableIndex]; - frac = (int16_t)(tmp32no1 & 0x00003fff); // Q14 - tmp16no2 += (int16_t)((tmp16no1 * frac) >> 14); - if (tmpIndFX == 0) { - tmpIndFX = 8192 - tmp16no2; // Q14 - } else { - tmpIndFX = 8192 + tmp16no2; // Q14 - } - } - indPriorFX = inst->weightLogLrt * tmpIndFX; // 6*Q14 - - //spectral flatness feature - if (inst->weightSpecFlat) { - tmpU32no1 = WEBRTC_SPL_UMUL(inst->featureSpecFlat, 400); // Q10 - tmpIndFX = 16384; // Q14(1.0) - //use larger width in tanh map for pause regions - tmpU32no2 = inst->thresholdSpecFlat - tmpU32no1; //Q10 - nShifts = 4; - if (inst->thresholdSpecFlat < tmpU32no1) { - tmpIndFX = 0; - tmpU32no2 = tmpU32no1 - inst->thresholdSpecFlat; - //widthPrior = widthPrior * 2.0; - nShifts++; - } - tmpU32no1 = WebRtcSpl_DivU32U16(tmpU32no2 << nShifts, 25); // Q14 - // compute indicator function: sigmoid map - // FLOAT code - // indicator1 = 0.5 * (tanh(sgnMap * widthPrior * - // (threshPrior1 - tmpFloat1)) + 1.0); - tableIndex = (int16_t)(tmpU32no1 >> 14); - if (tableIndex < 16) { - tmp16no2 = kIndicatorTable[tableIndex]; - tmp16no1 = kIndicatorTable[tableIndex + 1] - kIndicatorTable[tableIndex]; - frac = (int16_t)(tmpU32no1 & 0x00003fff); // Q14 - tmp16no2 += (int16_t)((tmp16no1 * frac) >> 14); - if (tmpIndFX) { - tmpIndFX = 8192 + tmp16no2; // Q14 - } else { - tmpIndFX = 8192 - tmp16no2; // Q14 - } - } - indPriorFX += inst->weightSpecFlat * tmpIndFX; // 6*Q14 - } - - //for template spectral-difference - if (inst->weightSpecDiff) { - tmpU32no1 = 0; - if (inst->featureSpecDiff) { - normTmp = WEBRTC_SPL_MIN(20 - inst->stages, - WebRtcSpl_NormU32(inst->featureSpecDiff)); - assert(normTmp >= 0); - tmpU32no1 = inst->featureSpecDiff << normTmp; // Q(normTmp-2*stages) - tmpU32no2 = inst->timeAvgMagnEnergy >> (20 - inst->stages - normTmp); - if (tmpU32no2 > 0) { - // Q(20 - inst->stages) - tmpU32no1 /= tmpU32no2; - } else { - tmpU32no1 = (uint32_t)(0x7fffffff); - } - } - tmpU32no3 = (inst->thresholdSpecDiff << 17) / 25; - tmpU32no2 = tmpU32no1 - tmpU32no3; - nShifts = 1; - tmpIndFX = 16384; // Q14(1.0) - //use larger width in tanh map for pause regions - if (tmpU32no2 & 0x80000000) { - tmpIndFX = 0; - tmpU32no2 = tmpU32no3 - tmpU32no1; - //widthPrior = widthPrior * 2.0; - nShifts--; - } - tmpU32no1 = tmpU32no2 >> nShifts; - // compute indicator function: sigmoid map - /* FLOAT code - indicator2 = 0.5 * (tanh(widthPrior * (tmpFloat1 - threshPrior2)) + 1.0); - */ - tableIndex = (int16_t)(tmpU32no1 >> 14); - if (tableIndex < 16) { - tmp16no2 = kIndicatorTable[tableIndex]; - tmp16no1 = kIndicatorTable[tableIndex + 1] - kIndicatorTable[tableIndex]; - frac = (int16_t)(tmpU32no1 & 0x00003fff); // Q14 - tmp16no2 += (int16_t)WEBRTC_SPL_MUL_16_16_RSFT_WITH_ROUND( - tmp16no1, frac, 14); - if (tmpIndFX) { - tmpIndFX = 8192 + tmp16no2; - } else { - tmpIndFX = 8192 - tmp16no2; - } - } - indPriorFX += inst->weightSpecDiff * tmpIndFX; // 6*Q14 - } - - //combine the indicator function with the feature weights - // FLOAT code - // indPrior = 1 - (weightIndPrior0 * indicator0 + weightIndPrior1 * - // indicator1 + weightIndPrior2 * indicator2); - indPriorFX16 = WebRtcSpl_DivW32W16ResW16(98307 - indPriorFX, 6); // Q14 - // done with computing indicator function - - //compute the prior probability - // FLOAT code - // inst->priorNonSpeechProb += PRIOR_UPDATE * - // (indPriorNonSpeech - inst->priorNonSpeechProb); - tmp16 = indPriorFX16 - inst->priorNonSpeechProb; // Q14 - inst->priorNonSpeechProb += (int16_t)((PRIOR_UPDATE_Q14 * tmp16) >> 14); - - //final speech probability: combine prior model with LR factor: - - memset(nonSpeechProbFinal, 0, sizeof(uint16_t) * inst->magnLen); - - if (inst->priorNonSpeechProb > 0) { - for (i = 0; i < inst->magnLen; i++) { - // FLOAT code - // invLrt = exp(inst->logLrtTimeAvg[i]); - // invLrt = inst->priorSpeechProb * invLrt; - // nonSpeechProbFinal[i] = (1.0 - inst->priorSpeechProb) / - // (1.0 - inst->priorSpeechProb + invLrt); - // invLrt = (1.0 - inst->priorNonSpeechProb) * invLrt; - // nonSpeechProbFinal[i] = inst->priorNonSpeechProb / - // (inst->priorNonSpeechProb + invLrt); - if (inst->logLrtTimeAvgW32[i] < 65300) { - tmp32no1 = (inst->logLrtTimeAvgW32[i] * 23637) >> 14; // Q12 - intPart = (int16_t)(tmp32no1 >> 12); - if (intPart < -8) { - intPart = -8; - } - frac = (int16_t)(tmp32no1 & 0x00000fff); // Q12 - - // Quadratic approximation of 2^frac - tmp32no2 = (frac * frac * 44) >> 19; // Q12. - tmp32no2 += (frac * 84) >> 7; // Q12 - invLrtFX = (1 << (8 + intPart)) + - WEBRTC_SPL_SHIFT_W32(tmp32no2, intPart - 4); // Q8 - - normTmp = WebRtcSpl_NormW32(invLrtFX); - normTmp2 = WebRtcSpl_NormW16((16384 - inst->priorNonSpeechProb)); - if (normTmp + normTmp2 >= 7) { - if (normTmp + normTmp2 < 15) { - invLrtFX >>= 15 - normTmp2 - normTmp; - // Q(normTmp+normTmp2-7) - tmp32no1 = invLrtFX * (16384 - inst->priorNonSpeechProb); - // Q(normTmp+normTmp2+7) - invLrtFX = WEBRTC_SPL_SHIFT_W32(tmp32no1, 7 - normTmp - normTmp2); - // Q14 - } else { - tmp32no1 = invLrtFX * (16384 - inst->priorNonSpeechProb); - // Q22 - invLrtFX = tmp32no1 >> 8; // Q14. - } - - tmp32no1 = (int32_t)inst->priorNonSpeechProb << 8; // Q22 - - nonSpeechProbFinal[i] = tmp32no1 / - (inst->priorNonSpeechProb + invLrtFX); // Q8 - } - } - } - } -} - |