| /* ------------------------------------------------------------------ |
| * 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_ */ |
| |
| |
