| /* |
| * 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_AECM_AECM_DEFINES_H_ |
| #define WEBRTC_MODULES_AUDIO_PROCESSING_AECM_AECM_DEFINES_H_ |
| |
| #define AECM_DYNAMIC_Q /* Turn on/off dynamic Q-domain. */ |
| |
| /* Algorithm parameters */ |
| #define FRAME_LEN 80 /* Total frame length, 10 ms. */ |
| |
| #define PART_LEN 64 /* Length of partition. */ |
| #define PART_LEN_SHIFT 7 /* Length of (PART_LEN * 2) in base 2. */ |
| |
| #define PART_LEN1 (PART_LEN + 1) /* Unique fft coefficients. */ |
| #define PART_LEN2 (PART_LEN << 1) /* Length of partition * 2. */ |
| #define PART_LEN4 (PART_LEN << 2) /* Length of partition * 4. */ |
| #define FAR_BUF_LEN PART_LEN4 /* Length of buffers. */ |
| #define MAX_DELAY 100 |
| |
| /* Counter parameters */ |
| #define CONV_LEN 512 /* Convergence length used at startup. */ |
| #define CONV_LEN2 (CONV_LEN << 1) /* Used at startup. */ |
| |
| /* Energy parameters */ |
| #define MAX_BUF_LEN 64 /* History length of energy signals. */ |
| #define FAR_ENERGY_MIN 1025 /* Lowest Far energy level: At least 2 */ |
| /* in energy. */ |
| #define FAR_ENERGY_DIFF 929 /* Allowed difference between max */ |
| /* and min. */ |
| #define ENERGY_DEV_OFFSET 0 /* The energy error offset in Q8. */ |
| #define ENERGY_DEV_TOL 400 /* The energy estimation tolerance (Q8). */ |
| #define FAR_ENERGY_VAD_REGION 230 /* Far VAD tolerance region. */ |
| |
| /* Stepsize parameters */ |
| #define MU_MIN 10 /* Min stepsize 2^-MU_MIN (far end energy */ |
| /* dependent). */ |
| #define MU_MAX 1 /* Max stepsize 2^-MU_MAX (far end energy */ |
| /* dependent). */ |
| #define MU_DIFF 9 /* MU_MIN - MU_MAX */ |
| |
| /* Channel parameters */ |
| #define MIN_MSE_COUNT 20 /* Min number of consecutive blocks with enough */ |
| /* far end energy to compare channel estimates. */ |
| #define MIN_MSE_DIFF 29 /* The ratio between adapted and stored channel to */ |
| /* accept a new storage (0.8 in Q-MSE_RESOLUTION). */ |
| #define MSE_RESOLUTION 5 /* MSE parameter resolution. */ |
| #define RESOLUTION_CHANNEL16 12 /* W16 Channel in Q-RESOLUTION_CHANNEL16. */ |
| #define RESOLUTION_CHANNEL32 28 /* W32 Channel in Q-RESOLUTION_CHANNEL. */ |
| #define CHANNEL_VAD 16 /* Minimum energy in frequency band */ |
| /* to update channel. */ |
| |
| /* Suppression gain parameters: SUPGAIN parameters in Q-(RESOLUTION_SUPGAIN). */ |
| #define RESOLUTION_SUPGAIN 8 /* Channel in Q-(RESOLUTION_SUPGAIN). */ |
| #define SUPGAIN_DEFAULT (1 << RESOLUTION_SUPGAIN) /* Default. */ |
| #define SUPGAIN_ERROR_PARAM_A 3072 /* Estimation error parameter */ |
| /* (Maximum gain) (8 in Q8). */ |
| #define SUPGAIN_ERROR_PARAM_B 1536 /* Estimation error parameter */ |
| /* (Gain before going down). */ |
| #define SUPGAIN_ERROR_PARAM_D SUPGAIN_DEFAULT /* Estimation error parameter */ |
| /* (Should be the same as Default) (1 in Q8). */ |
| #define SUPGAIN_EPC_DT 200 /* SUPGAIN_ERROR_PARAM_C * ENERGY_DEV_TOL */ |
| |
| /* Defines for "check delay estimation" */ |
| #define CORR_WIDTH 31 /* Number of samples to correlate over. */ |
| #define CORR_MAX 16 /* Maximum correlation offset. */ |
| #define CORR_MAX_BUF 63 |
| #define CORR_DEV 4 |
| #define CORR_MAX_LEVEL 20 |
| #define CORR_MAX_LOW 4 |
| #define CORR_BUF_LEN (CORR_MAX << 1) + 1 |
| /* Note that CORR_WIDTH + 2*CORR_MAX <= MAX_BUF_LEN. */ |
| |
| #define ONE_Q14 (1 << 14) |
| |
| /* NLP defines */ |
| #define NLP_COMP_LOW 3277 /* 0.2 in Q14 */ |
| #define NLP_COMP_HIGH ONE_Q14 /* 1 in Q14 */ |
| |
| #endif |
