204 lines
8.0 KiB
C
204 lines
8.0 KiB
C
/* ------------------------------------------------------------------
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* Copyright (C) 1998-2009 PacketVideo
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
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* express or implied.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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* -------------------------------------------------------------------
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*/
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/****************************************************************************************
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Portions of this file are derived from the following 3GPP standard:
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3GPP TS 26.073
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ANSI-C code for the Adaptive Multi-Rate (AMR) speech codec
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Available from http://www.3gpp.org
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(C) 2004, 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TTA, TTC)
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Permission to distribute, modify and use this file under the standard license
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terms listed above has been obtained from the copyright holder.
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****************************************************************************************/
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/*
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Filename: /audio/gsm_amr/c/include/vad2.h
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------------------------------------------------------------------------------
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REVISION HISTORY
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Description: Placed header file in the proper template format. Added
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parameter pOverflow for the basic math ops.
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Description: Added pOverflow to the r_fft function prototype.
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Description: Added pOverflow to the LTP_flag_update prototype.
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Description: Replaced "int" and/or "char" with OSCL defined types.
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Description: Moved _cplusplus #ifdef after Include section.
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Who: Date:
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Description:
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------------------------------------------------------------------------------
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INCLUDE DESCRIPTION
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This file contains all the constant definitions, prototype and structure
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definitions needed by vad_2.c
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------------------------------------------------------------------------------
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*/
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/*----------------------------------------------------------------------------
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; CONTINUE ONLY IF NOT ALREADY DEFINED
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----------------------------------------------------------------------------*/
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#ifndef vad_2_h
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#define vad_2_h "$Id $"
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/*----------------------------------------------------------------------------
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; INCLUDES
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----------------------------------------------------------------------------*/
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#include "typedef.h"
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/*--------------------------------------------------------------------------*/
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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/*----------------------------------------------------------------------------
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; MACROS
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; Define module specific macros here
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----------------------------------------------------------------------------*/
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/*----------------------------------------------------------------------------
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; DEFINES
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; Include all pre-processor statements here.
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----------------------------------------------------------------------------*/
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#define YES 1
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#define NO 0
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#define ON 1
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#define OFF 0
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#define TRUE 1
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#define FALSE 0
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#define FRM_LEN 80
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#define DELAY 24
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#define FFT_LEN 128
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#define NUM_CHAN 16
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#define LO_CHAN 0
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#define HI_CHAN 15
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#define UPDATE_THLD 35
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#define HYSTER_CNT_THLD 6
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#define UPDATE_CNT_THLD 50
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#define SHIFT_STATE_0 0 /* channel energy scaled as 22,9 */
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#define SHIFT_STATE_1 1 /* channel energy scaled as 27,4 */
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#define NOISE_FLOOR_CHAN_0 512 /* 1.0 scaled as 22,9 */
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#define MIN_CHAN_ENRG_0 32 /* 0.0625 scaled as 22,9 */
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#define MIN_NOISE_ENRG_0 32 /* 0.0625 scaled as 22,9 */
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#define INE_NOISE_0 8192 /* 16.0 scaled as 22,9 */
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#define FRACTIONAL_BITS_0 9 /* used as input to fn10Log10() */
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#define NOISE_FLOOR_CHAN_1 16 /* 1.0 scaled as 27,4 */
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#define MIN_CHAN_ENRG_1 1 /* 0.0625 scaled as 27,4 */
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#define MIN_NOISE_ENRG_1 1 /* 0.0625 scaled as 27,4 */
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#define INE_NOISE_1 256 /* 16.0 scaled as 27,4 */
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#define FRACTIONAL_BITS_1 4 /* used as input to fn10Log10() */
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#define STATE_1_TO_0_SHIFT_R (FRACTIONAL_BITS_1-FRACTIONAL_BITS_0) /* state correction factor */
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#define STATE_0_TO_1_SHIFT_R (FRACTIONAL_BITS_0-FRACTIONAL_BITS_1) /* state correction factor */
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#define HIGH_ALPHA 29491 /* 0.9 scaled as 0,15 */
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#define LOW_ALPHA 22938 /* 0.7 scaled as 0,15 */
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#define ALPHA_RANGE (HIGH_ALPHA - LOW_ALPHA)
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#define DEV_THLD 7168 /* 28.0 scaled as 7,8 */
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#define PRE_EMP_FAC (-26214) /* -0.8 scaled as 0,15 */
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#define CEE_SM_FAC 18022 /* 0.55 scaled as 0,15 */
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#define ONE_MINUS_CEE_SM_FAC 14746 /* 0.45 scaled as 0,15 */
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#define CNE_SM_FAC 3277 /* 0.1 scaled as 0,15 */
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#define ONE_MINUS_CNE_SM_FAC 29491 /* 0.9 scaled as 0,15 */
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#define FFT_HEADROOM 2
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/*----------------------------------------------------------------------------
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; EXTERNAL VARIABLES REFERENCES
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; Declare variables used in this module but defined elsewhere
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----------------------------------------------------------------------------*/
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/*----------------------------------------------------------------------------
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; SIMPLE TYPEDEF'S
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----------------------------------------------------------------------------*/
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/*----------------------------------------------------------------------------
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; ENUMERATED TYPEDEF'S
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----------------------------------------------------------------------------*/
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/*----------------------------------------------------------------------------
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; STRUCTURES TYPEDEF'S
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----------------------------------------------------------------------------*/
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typedef struct
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{
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Word16 pre_emp_mem;
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Word16 update_cnt;
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Word16 hyster_cnt;
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Word16 last_update_cnt;
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Word16 ch_enrg_long_db[NUM_CHAN]; /* scaled as 7,8 */
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Word32 Lframe_cnt;
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Word32 Lch_enrg[NUM_CHAN]; /* scaled as 22,9 or 27,4 */
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Word32 Lch_noise[NUM_CHAN]; /* scaled as 22,9 */
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Word16 last_normb_shift; /* last block norm shift count */
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Word16 tsnr; /* total signal-to-noise ratio in dB (scaled as 7,8) */
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Word16 hangover;
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Word16 burstcount;
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Word16 fupdate_flag; /* forced update flag from previous frame */
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Word16 negSNRvar; /* Negative SNR variance (scaled as 7,8) */
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Word16 negSNRbias; /* sensitivity bias from negative SNR variance (scaled as 15,0) */
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Word16 shift_state; /* use 22,9 or 27,4 scaling for ch_enrg[] */
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Word32 L_R0;
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Word32 L_Rmax;
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Flag LTP_flag; /* Use to indicate the the LTP gain is > LTP_THRESH */
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} vadState2;
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/*----------------------------------------------------------------------------
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; GLOBAL FUNCTION DEFINITIONS
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; Function Prototype declaration
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----------------------------------------------------------------------------*/
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Word16 vad2(Word16 *farray_ptr, vadState2 *st, Flag *pOverflow);
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Word16 vad2_init(vadState2 **st);
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Word16 vad2_reset(vadState2 *st);
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void vad2_exit(vadState2 **state);
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void r_fft(Word16 *farray_ptr, Flag *pOverflow);
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void LTP_flag_update(vadState2 *st, Word16 mode, Flag *pOverflow);
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/*----------------------------------------------------------------------------
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; END
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----------------------------------------------------------------------------*/
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#ifdef __cplusplus
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}
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#endif
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#endif /* _VAD2_H_ */
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