| /* ------------------------------------------------------------------ |
| * 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/pitch_fr.h |
| |
| Date: 02/04/2002 |
| |
| ------------------------------------------------------------------------------ |
| REVISION HISTORY |
| |
| Description: Replaced "int" and/or "char" with OSCL defined types. |
| |
| Description: Moved _cplusplus #ifdef after Include section. |
| |
| Description: |
| |
| ------------------------------------------------------------------------------ |
| INCLUDE DESCRIPTION |
| |
| File : pitch_fr.h |
| Purpose : Find the pitch period with 1/3 or 1/6 subsample |
| : resolution (closed loop). |
| |
| ------------------------------------------------------------------------------ |
| */ |
| |
| #ifndef _PITCH_FR_H_ |
| #define _PITCH_FR_H_ |
| #define pitch_fr_h "$Id $" |
| |
| /*---------------------------------------------------------------------------- |
| ; INCLUDES |
| ----------------------------------------------------------------------------*/ |
| #include "typedef.h" |
| #include "mode.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 T0_prev_subframe; /* integer pitch lag of previous sub-frame */ |
| } Pitch_frState; |
| |
| /*---------------------------------------------------------------------------- |
| ; GLOBAL FUNCTION DEFINITIONS |
| ; [List function prototypes here] |
| ----------------------------------------------------------------------------*/ |
| |
| Word16 Pitch_fr_init(Pitch_frState **st); |
| /* initialize one instance of the pre processing state. |
| Stores pointer to filter status struct in *st. This pointer has to |
| be passed to Pitch_fr in each call. |
| returns 0 on success |
| */ |
| |
| Word16 Pitch_fr_reset(Pitch_frState *st); |
| /* reset of pre processing state (i.e. set state memory to zero) |
| returns 0 on success |
| */ |
| |
| void Pitch_fr_exit(Pitch_frState **st); |
| /* de-initialize pre processing state (i.e. free status struct) |
| stores NULL in *st |
| */ |
| |
| Word16 Pitch_fr( /* o : pitch period (integer) */ |
| Pitch_frState *st, /* i/o : State struct */ |
| enum Mode mode, /* i : codec mode */ |
| Word16 T_op[], /* i : open loop pitch lags */ |
| Word16 exc[], /* i : excitation buffer */ |
| Word16 xn[], /* i : target vector */ |
| Word16 h[], /* i : impulse response of synthesis and |
| weighting filters */ |
| Word16 L_subfr, /* i : Length of subframe */ |
| Word16 i_subfr, /* i : subframe offset */ |
| Word16 *pit_frac, /* o : pitch period (fractional) */ |
| Word16 *resu3, /* o : subsample resolution 1/3 (=1) or 1/6 (=0) */ |
| Word16 *ana_index, /* o : index of encoding */ |
| Flag *pOverflow |
| ); |
| |
| #ifdef __cplusplus |
| } |
| #endif |
| |
| #endif /* _PITCH_FR_H_ */ |
| |
| |
