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