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Diffstat (limited to 'media/libstagefright/codecs/amrnb/common/include/vad2.h')
| -rw-r--r-- | media/libstagefright/codecs/amrnb/common/include/vad2.h | 203 |
1 files changed, 203 insertions, 0 deletions
diff --git a/media/libstagefright/codecs/amrnb/common/include/vad2.h b/media/libstagefright/codecs/amrnb/common/include/vad2.h new file mode 100644 index 0000000..3197b3a --- /dev/null +++ b/media/libstagefright/codecs/amrnb/common/include/vad2.h @@ -0,0 +1,203 @@ +/* ------------------------------------------------------------------ + * 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_ */ + + |