| /* ------------------------------------------------------------------ |
| * 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/src/include/dtx_enc.h |
| |
| Date: 01/29/2002 |
| |
| ------------------------------------------------------------------------------ |
| REVISION HISTORY |
| |
| Description: Replaced "int" and/or "char" with OSCL defined types. |
| |
| Description: Moved _cplusplus #ifdef after Include section. |
| |
| Description: |
| |
| ------------------------------------------------------------------------------ |
| INCLUDE DESCRIPTION |
| |
| File : dtx_enc.h |
| Purpose : DTX mode computation of SID parameters |
| |
| ------------------------------------------------------------------------------ |
| */ |
| |
| #ifndef dtx_enc_h |
| #define dtx_enc_h "$Id $" |
| |
| /*---------------------------------------------------------------------------- |
| ; INCLUDES |
| ----------------------------------------------------------------------------*/ |
| #include "typedef.h" |
| #include "cnst.h" |
| #include "q_plsf.h" |
| #include "gc_pred.h" |
| #include "mode.h" |
| #include "dtx_common_def.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] |
| ----------------------------------------------------------------------------*/ |
| extern const Word16 lsp_init_data[]; |
| /*---------------------------------------------------------------------------- |
| ; SIMPLE TYPEDEF'S |
| ----------------------------------------------------------------------------*/ |
| |
| /*---------------------------------------------------------------------------- |
| ; ENUMERATED TYPEDEF'S |
| ----------------------------------------------------------------------------*/ |
| |
| /*---------------------------------------------------------------------------- |
| ; STRUCTURES TYPEDEF'S |
| ----------------------------------------------------------------------------*/ |
| typedef struct |
| { |
| Word16 lsp_hist[M * DTX_HIST_SIZE]; |
| Word16 log_en_hist[DTX_HIST_SIZE]; |
| Word16 hist_ptr; |
| Word16 log_en_index; |
| Word16 init_lsf_vq_index; |
| Word16 lsp_index[3]; |
| |
| /* DTX handler stuff */ |
| Word16 dtxHangoverCount; |
| Word16 decAnaElapsedCount; |
| |
| } dtx_encState; |
| |
| /*---------------------------------------------------------------------------- |
| ; GLOBAL FUNCTION DEFINITIONS |
| ; [List function prototypes here] |
| ----------------------------------------------------------------------------*/ |
| /* |
| ************************************************************************** |
| * Function : dtx_enc_init |
| * Purpose : Allocates memory and initializes state variables |
| * Description : Stores pointer to filter status struct in *st. This |
| * pointer has to be passed to dtx_enc in each call. |
| * Returns : 0 on success |
| * |
| ************************************************************************** |
| */ |
| Word16 dtx_enc_init(dtx_encState **st); |
| |
| /* |
| ************************************************************************** |
| * |
| * Function : dtx_enc_reset |
| * Purpose : Resets state memory |
| * Returns : 0 on success |
| * |
| ************************************************************************** |
| */ |
| Word16 dtx_enc_reset(dtx_encState *st); |
| |
| /* |
| ************************************************************************** |
| * |
| * Function : dtx_enc_exit |
| * Purpose : The memory used for state memory is freed |
| * Description : Stores NULL in *st |
| * |
| ************************************************************************** |
| */ |
| void dtx_enc_exit(dtx_encState **st); |
| |
| /* |
| ************************************************************************** |
| * |
| * Function : dtx_enc |
| * Purpose : |
| * Description : |
| * |
| ************************************************************************** |
| */ |
| void dtx_enc(dtx_encState *st, /* i/o : State struct */ |
| Word16 computeSidFlag, /* i : compute SID */ |
| Q_plsfState *qSt, /* i/o : Qunatizer state struct */ |
| gc_predState* predState, /* i/o : State struct */ |
| Word16 **anap, /* o : analysis parameters */ |
| Flag *pOverflow /* i/o : overflow indicator */ |
| ); |
| |
| /* |
| ************************************************************************** |
| * |
| * Function : dtx_buffer |
| * Purpose : handles the DTX buffer |
| * |
| ************************************************************************** |
| */ |
| void dtx_buffer(dtx_encState *st, /* i/o : State struct */ |
| Word16 lsp_new[], /* i : LSP vector */ |
| Word16 speech[], /* i : speech samples */ |
| Flag *pOverflow /* i/o : overflow indicator */ |
| ); |
| |
| /* |
| ************************************************************************** |
| * |
| * Function : tx_dtx_handler |
| * Purpose : adds extra speech hangover to analyze speech on the decoding side. |
| * Description : returns 1 when a new SID analysis may be made |
| * otherwise it adds the appropriate hangover after a sequence |
| * with out updates of SID parameters . |
| * |
| ************************************************************************** |
| */ |
| Word16 tx_dtx_handler(dtx_encState *st, /* i/o : State struct */ |
| Word16 vad_flag, /* i : vad decision */ |
| enum Mode *usedMode, /* i/o : mode changed or not */ |
| Flag *pOverflow /* i/o : overflow indicator */ |
| ); |
| |
| |
| #ifdef __cplusplus |
| } |
| #endif |
| |
| #endif /* _dtx_enc_h_ */ |
| |
| |
