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Diffstat (limited to 'media/libstagefright/codecs/amrnb/dec/src/dtx_dec.h')
| -rw-r--r-- | media/libstagefright/codecs/amrnb/dec/src/dtx_dec.h | 191 |
1 files changed, 191 insertions, 0 deletions
diff --git a/media/libstagefright/codecs/amrnb/dec/src/dtx_dec.h b/media/libstagefright/codecs/amrnb/dec/src/dtx_dec.h new file mode 100644 index 0000000..2b5a614 --- /dev/null +++ b/media/libstagefright/codecs/amrnb/dec/src/dtx_dec.h @@ -0,0 +1,191 @@ +/* ------------------------------------------------------------------ + * 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_ */ |