| /* ------------------------------------------------------------------ |
| * 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/dtx_dec.h |
| |
| Date: 02/06/2002 |
| |
| ------------------------------------------------------------------------------ |
| REVISION HISTORY |
| |
| Description: Replaced "int" and/or "char" with OSCL defined types. |
| |
| Description: Moved _cplusplus #ifdef after Include section. |
| |
| Description: |
| |
| ------------------------------------------------------------------------------ |
| INCLUDE DESCRIPTION |
| |
| File : dtx_dec.h |
| Purpose : Decode comfort noice when in DTX |
| |
| ------------------------------------------------------------------------------ |
| */ |
| |
| /*---------------------------------------------------------------------------- |
| ; CONTINUE ONLY IF NOT ALREADY DEFINED |
| ----------------------------------------------------------------------------*/ |
| #ifndef DTX_DEC_H |
| #define DTX_DEC_H |
| #define dtx_dec_h "$Id $" |
| |
| /*---------------------------------------------------------------------------- |
| ; INCLUDES |
| ----------------------------------------------------------------------------*/ |
| #include "typedef.h" |
| #include "d_plsf.h" |
| #include "gc_pred.h" |
| #include "c_g_aver.h" |
| #include "frame.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 |
| ----------------------------------------------------------------------------*/ |
| |
| /*---------------------------------------------------------------------------- |
| ; SIMPLE TYPEDEF'S |
| ----------------------------------------------------------------------------*/ |
| |
| |
| /*---------------------------------------------------------------------------- |
| ; ENUMERATED TYPEDEF'S |
| ----------------------------------------------------------------------------*/ |
| enum DTXStateType {SPEECH = 0, DTX, DTX_MUTE}; |
| |
| /*---------------------------------------------------------------------------- |
| ; STRUCTURES TYPEDEF'S |
| ----------------------------------------------------------------------------*/ |
| typedef struct |
| { |
| Word16 since_last_sid; |
| Word16 true_sid_period_inv; |
| Word16 log_en; |
| Word16 old_log_en; |
| Word32 L_pn_seed_rx; |
| Word16 lsp[M]; |
| Word16 lsp_old[M]; |
| |
| Word16 lsf_hist[M*DTX_HIST_SIZE]; |
| Word16 lsf_hist_ptr; |
| Word16 lsf_hist_mean[M*DTX_HIST_SIZE]; |
| Word16 log_pg_mean; |
| Word16 log_en_hist[DTX_HIST_SIZE]; |
| Word16 log_en_hist_ptr; |
| |
| Word16 log_en_adjust; |
| |
| Word16 dtxHangoverCount; |
| Word16 decAnaElapsedCount; |
| |
| Word16 sid_frame; |
| Word16 valid_data; |
| Word16 dtxHangoverAdded; |
| |
| enum DTXStateType dtxGlobalState; /* contains previous state */ |
| /* updated in main decoder */ |
| |
| Word16 data_updated; /* marker to know if CNI data is ever renewed */ |
| |
| } dtx_decState; |
| |
| /*---------------------------------------------------------------------------- |
| ; GLOBAL FUNCTION DEFINITIONS |
| ; Function Prototype declaration |
| ----------------------------------------------------------------------------*/ |
| |
| /* |
| * Function : dtx_dec_reset |
| * Purpose : Resets state memory |
| * Returns : 0 on success |
| */ |
| Word16 dtx_dec_reset(dtx_decState *st); |
| |
| /* |
| * Function : dtx_dec |
| * Purpose : |
| * Description : |
| */ |
| void dtx_dec( |
| dtx_decState *st, /* i/o : State struct */ |
| Word16 mem_syn[], /* i/o : AMR decoder state */ |
| D_plsfState* lsfState, /* i/o : decoder lsf states */ |
| gc_predState* predState, /* i/o : prediction states */ |
| Cb_gain_averageState* averState, /* i/o : CB gain average states */ |
| enum DTXStateType new_state, /* i : new DTX state */ |
| enum Mode mode, /* i : AMR mode */ |
| Word16 parm[], /* i : Vector of synthesis parameters */ |
| Word16 synth[], /* o : synthesised speech */ |
| Word16 A_t[], /* o : decoded LP filter in 4 subframes*/ |
| Flag *pOverflow |
| ); |
| |
| void dtx_dec_activity_update(dtx_decState *st, |
| Word16 lsf[], |
| Word16 frame[], |
| Flag *pOverflow); |
| |
| /* |
| * Function : rx_dtx_handler |
| * Purpose : reads the frame type and checks history |
| * Description : to decide what kind of DTX/CNI action to perform |
| */ |
| enum DTXStateType rx_dtx_handler(dtx_decState *st, /* i/o : State struct */ |
| enum RXFrameType frame_type,/* i : Frame type */ |
| Flag *pOverflow); |
| |
| /*---------------------------------------------------------------------------- |
| ; END |
| ----------------------------------------------------------------------------*/ |
| #ifdef __cplusplus |
| } |
| #endif |
| |
| #endif /* DEC_AMR_H_ */ |
