diff options
author | Jinkun Jang <jinkun.jang@samsung.com> | 2013-03-13 01:44:24 +0900 |
---|---|---|
committer | Jinkun Jang <jinkun.jang@samsung.com> | 2013-03-13 01:44:24 +0900 |
commit | e28f3aee8eca3cc7a10935f63899d5c4f6ba1ede (patch) | |
tree | 3e9da8eb6a913278403e100d0bbe0b9231a4b6ac /opencore/codecs_v2/audio/gsm_amr/amr_nb/dec/src/ec_gains.h | |
parent | 54f90e8fa8d02c96e2c6d0a5bd71603dc016cf70 (diff) | |
download | opencore-amr-e28f3aee8eca3cc7a10935f63899d5c4f6ba1ede.tar.gz opencore-amr-e28f3aee8eca3cc7a10935f63899d5c4f6ba1ede.tar.bz2 opencore-amr-e28f3aee8eca3cc7a10935f63899d5c4f6ba1ede.zip |
Tizen 2.1 base
Diffstat (limited to 'opencore/codecs_v2/audio/gsm_amr/amr_nb/dec/src/ec_gains.h')
-rw-r--r-- | opencore/codecs_v2/audio/gsm_amr/amr_nb/dec/src/ec_gains.h | 196 |
1 files changed, 196 insertions, 0 deletions
diff --git a/opencore/codecs_v2/audio/gsm_amr/amr_nb/dec/src/ec_gains.h b/opencore/codecs_v2/audio/gsm_amr/amr_nb/dec/src/ec_gains.h new file mode 100644 index 0000000..6a16e0f --- /dev/null +++ b/opencore/codecs_v2/audio/gsm_amr/amr_nb/dec/src/ec_gains.h @@ -0,0 +1,196 @@ +/* ------------------------------------------------------------------ + * 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: ec_gains.h + +------------------------------------------------------------------------------ + INCLUDE DESCRIPTION + + File : ec_gains.c + Purpose: : Error concealment for pitch and codebook gains + +------------------------------------------------------------------------------ +*/ + +#ifndef _EC_GAINS_H_ +#define _EC_GAINS_H_ +#define ec_gains_h "$Id $" + +/*---------------------------------------------------------------------------- +; INCLUDES +----------------------------------------------------------------------------*/ +#include "typedef.h" +#include "gc_pred.h" + + +/*--------------------------------------------------------------------------*/ +#ifdef __cplusplus +extern "C" +{ +#endif + + /*---------------------------------------------------------------------------- + ; MACROS + ; [Define module specific macros here] + ----------------------------------------------------------------------------*/ + + /*---------------------------------------------------------------------------- + ; DEFINES + ; [Include all pre-processor statements here.] + ----------------------------------------------------------------------------*/ + + /*---------------------------------------------------------------------------- + ; EXTERNAL VARIABLES REFERENCES + ; [Declare variables used in this module but defined elsewhere] + ----------------------------------------------------------------------------*/ + + /*---------------------------------------------------------------------------- + ; SIMPLE TYPEDEF'S + ----------------------------------------------------------------------------*/ + + /*---------------------------------------------------------------------------- + ; ENUMERATED TYPEDEF'S + ----------------------------------------------------------------------------*/ + + /*---------------------------------------------------------------------------- + ; STRUCTURES TYPEDEF'S + ----------------------------------------------------------------------------*/ + typedef struct + { + Word16 pbuf[5]; + Word16 past_gain_pit; + Word16 prev_gp; + } ec_gain_pitchState; + + typedef struct + { + Word16 gbuf[5]; + Word16 past_gain_code; + Word16 prev_gc; + } ec_gain_codeState; + + /*---------------------------------------------------------------------------- + ; GLOBAL FUNCTION DEFINITIONS + ; [List function prototypes here] + ----------------------------------------------------------------------------*/ + + /* + * Function : ec_gain_code_reset + * Purpose : Resets state memory + * + */ + Word16 ec_gain_code_reset( + ec_gain_codeState *state + ); + + + /* + * Function : ec_gain_code + * Purpose : conceal the codebook gain + * Call this function only in BFI (instead of normal gain + * decoding function) + */ + void ec_gain_code( + ec_gain_codeState *st, /* i/o : State struct */ + gc_predState *pred_state, /* i/o : MA predictor state */ + Word16 state, /* i : state of the state machine */ + Word16 *gain_code, /* o : decoded innovation gain */ + Flag *pOverflow + ); + + /* + * Function : ec_gain_code_update + * Purpose : update the codebook gain concealment state; + * limit gain_code if the previous frame was bad + * Call this function always after decoding (or concealing) + * the gain + */ + void ec_gain_code_update( + ec_gain_codeState *st, /* i/o : State struct */ + Word16 bfi, /* i : flag: frame is bad */ + Word16 prev_bf, /* i : flag: previous frame was bad */ + Word16 *gain_code, /* i/o : decoded innovation gain */ + Flag *pOverflow + ); + + + /* + * Function: ec_gain_pitch_reset + * Purpose: Resets state memory + */ + Word16 ec_gain_pitch_reset( + ec_gain_pitchState *state + ); + + /* + * Function : ec_gain_pitch_exit + * Purpose : The memory used for state memory is freed + */ + void ec_gain_pitch_exit( + ec_gain_pitchState **state + ); + + /* + * Function : ec_gain_pitch + * Purpose : conceal the pitch gain + * Call this function only in BFI (instead of normal gain + * decoding function) + */ + void ec_gain_pitch( + ec_gain_pitchState *st, /* i/o : state variables */ + Word16 state, /* i : state of the state machine */ + Word16 *gain_pitch, /* o : pitch gain (Q14) */ + Flag *pOverflow + ); + + /* + * Function : ec_gain_pitch_update + * Purpose : update the pitch gain concealment state; + * limit gain_pitch if the previous frame was bad + * Call this function always after decoding (or concealing) + * the gain + */ + void ec_gain_pitch_update( + ec_gain_pitchState *st, /* i/o : state variables */ + Word16 bfi, /* i : flag: frame is bad */ + Word16 prev_bf, /* i : flag: previous frame was bad */ + Word16 *gain_pitch, /* i/o : pitch gain */ + Flag *pOverflow + ); + + +#ifdef __cplusplus +} +#endif + +#endif /* _EC_GAINS_H_ */ + + |