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88 lines
4.2 KiB
C
88 lines
4.2 KiB
C
10 years ago
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/*
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* Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef WEBRTC_MODULES_AUDIO_PROCESSING_AECM_AECM_DEFINES_H_
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#define WEBRTC_MODULES_AUDIO_PROCESSING_AECM_AECM_DEFINES_H_
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#define AECM_DYNAMIC_Q /* Turn on/off dynamic Q-domain. */
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/* Algorithm parameters */
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#define FRAME_LEN 80 /* Total frame length, 10 ms. */
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#define PART_LEN 64 /* Length of partition. */
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#define PART_LEN_SHIFT 7 /* Length of (PART_LEN * 2) in base 2. */
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#define PART_LEN1 (PART_LEN + 1) /* Unique fft coefficients. */
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#define PART_LEN2 (PART_LEN << 1) /* Length of partition * 2. */
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#define PART_LEN4 (PART_LEN << 2) /* Length of partition * 4. */
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#define FAR_BUF_LEN PART_LEN4 /* Length of buffers. */
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#define MAX_DELAY 100
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/* Counter parameters */
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#define CONV_LEN 512 /* Convergence length used at startup. */
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#define CONV_LEN2 (CONV_LEN << 1) /* Used at startup. */
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/* Energy parameters */
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#define MAX_BUF_LEN 64 /* History length of energy signals. */
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#define FAR_ENERGY_MIN 1025 /* Lowest Far energy level: At least 2 */
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/* in energy. */
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#define FAR_ENERGY_DIFF 929 /* Allowed difference between max */
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/* and min. */
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#define ENERGY_DEV_OFFSET 0 /* The energy error offset in Q8. */
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#define ENERGY_DEV_TOL 400 /* The energy estimation tolerance (Q8). */
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#define FAR_ENERGY_VAD_REGION 230 /* Far VAD tolerance region. */
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/* Stepsize parameters */
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#define MU_MIN 10 /* Min stepsize 2^-MU_MIN (far end energy */
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/* dependent). */
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#define MU_MAX 1 /* Max stepsize 2^-MU_MAX (far end energy */
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/* dependent). */
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#define MU_DIFF 9 /* MU_MIN - MU_MAX */
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/* Channel parameters */
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#define MIN_MSE_COUNT 20 /* Min number of consecutive blocks with enough */
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/* far end energy to compare channel estimates. */
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#define MIN_MSE_DIFF 29 /* The ratio between adapted and stored channel to */
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/* accept a new storage (0.8 in Q-MSE_RESOLUTION). */
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#define MSE_RESOLUTION 5 /* MSE parameter resolution. */
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#define RESOLUTION_CHANNEL16 12 /* W16 Channel in Q-RESOLUTION_CHANNEL16. */
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#define RESOLUTION_CHANNEL32 28 /* W32 Channel in Q-RESOLUTION_CHANNEL. */
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#define CHANNEL_VAD 16 /* Minimum energy in frequency band */
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/* to update channel. */
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/* Suppression gain parameters: SUPGAIN parameters in Q-(RESOLUTION_SUPGAIN). */
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#define RESOLUTION_SUPGAIN 8 /* Channel in Q-(RESOLUTION_SUPGAIN). */
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#define SUPGAIN_DEFAULT (1 << RESOLUTION_SUPGAIN) /* Default. */
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#define SUPGAIN_ERROR_PARAM_A 3072 /* Estimation error parameter */
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/* (Maximum gain) (8 in Q8). */
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#define SUPGAIN_ERROR_PARAM_B 1536 /* Estimation error parameter */
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/* (Gain before going down). */
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#define SUPGAIN_ERROR_PARAM_D SUPGAIN_DEFAULT /* Estimation error parameter */
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/* (Should be the same as Default) (1 in Q8). */
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#define SUPGAIN_EPC_DT 200 /* SUPGAIN_ERROR_PARAM_C * ENERGY_DEV_TOL */
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/* Defines for "check delay estimation" */
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#define CORR_WIDTH 31 /* Number of samples to correlate over. */
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#define CORR_MAX 16 /* Maximum correlation offset. */
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#define CORR_MAX_BUF 63
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#define CORR_DEV 4
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#define CORR_MAX_LEVEL 20
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#define CORR_MAX_LOW 4
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#define CORR_BUF_LEN (CORR_MAX << 1) + 1
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/* Note that CORR_WIDTH + 2*CORR_MAX <= MAX_BUF_LEN. */
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#define ONE_Q14 (1 << 14)
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/* NLP defines */
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#define NLP_COMP_LOW 3277 /* 0.2 in Q14 */
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#define NLP_COMP_HIGH ONE_Q14 /* 1 in Q14 */
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#endif
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