1 /* 2 * Copyright (c) 2011 The WebRTC project authors. All Rights Reserved. 3 * 4 * Use of this source code is governed by a BSD-style license 5 * that can be found in the LICENSE file in the root of the source 6 * tree. An additional intellectual property rights grant can be found 7 * in the file PATENTS. All contributing project authors may 8 * be found in the AUTHORS file in the root of the source tree. 9 */ 10 11 #ifndef MODULES_AUDIO_PROCESSING_AGC_LEGACY_DIGITAL_AGC_H_ 12 #define MODULES_AUDIO_PROCESSING_AGC_LEGACY_DIGITAL_AGC_H_ 13 14 #include "common_audio/signal_processing/include/signal_processing_library.h" 15 16 namespace webrtc { 17 18 typedef struct { 19 int32_t downState[8]; 20 int16_t HPstate; 21 int16_t counter; 22 int16_t logRatio; // log( P(active) / P(inactive) ) (Q10) 23 int16_t meanLongTerm; // Q10 24 int32_t varianceLongTerm; // Q8 25 int16_t stdLongTerm; // Q10 26 int16_t meanShortTerm; // Q10 27 int32_t varianceShortTerm; // Q8 28 int16_t stdShortTerm; // Q10 29 } AgcVad; // total = 54 bytes 30 31 typedef struct { 32 int32_t capacitorSlow; 33 int32_t capacitorFast; 34 int32_t gain; 35 int32_t gainTable[32]; 36 int16_t gatePrevious; 37 int16_t agcMode; 38 AgcVad vadNearend; 39 AgcVad vadFarend; 40 } DigitalAgc; 41 42 int32_t WebRtcAgc_InitDigital(DigitalAgc* digitalAgcInst, int16_t agcMode); 43 44 int32_t WebRtcAgc_ComputeDigitalGains(DigitalAgc* digitalAgcInst, 45 const int16_t* const* inNear, 46 size_t num_bands, 47 uint32_t FS, 48 int16_t lowLevelSignal, 49 int32_t gains[11]); 50 51 int32_t WebRtcAgc_ApplyDigitalGains(const int32_t gains[11], 52 size_t num_bands, 53 uint32_t FS, 54 const int16_t* const* in_near, 55 int16_t* const* out); 56 57 int32_t WebRtcAgc_AddFarendToDigital(DigitalAgc* digitalAgcInst, 58 const int16_t* inFar, 59 size_t nrSamples); 60 61 void WebRtcAgc_InitVad(AgcVad* vadInst); 62 63 int16_t WebRtcAgc_ProcessVad(AgcVad* vadInst, // (i) VAD state 64 const int16_t* in, // (i) Speech signal 65 size_t nrSamples); // (i) number of samples 66 67 int32_t WebRtcAgc_CalculateGainTable(int32_t* gainTable, // Q16 68 int16_t compressionGaindB, // Q0 (in dB) 69 int16_t targetLevelDbfs, // Q0 (in dB) 70 uint8_t limiterEnable, 71 int16_t analogTarget); 72 73 } // namespace webrtc 74 75 #endif // MODULES_AUDIO_PROCESSING_AGC_LEGACY_DIGITAL_AGC_H_ 76