📄 vad2.h
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/* ------------------------------------------------------------------ * Copyright (C) 2008 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 licenseterms listed above has been obtained from the copyright holder.****************************************************************************************//*------------------------------------------------------------------------------ Filename: /audio/gsm_amr/c/include/vad2.h Date: 02/04/2002------------------------------------------------------------------------------ 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. 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 __cplusplusextern "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_ */⌨️ 快捷键说明
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