1 /* ------------------------------------------------------------------ 2 * Copyright (C) 1998-2009 PacketVideo 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either 13 * express or implied. 14 * See the License for the specific language governing permissions 15 * and limitations under the License. 16 * ------------------------------------------------------------------- 17 */ 18 /**************************************************************************************** 19 Portions of this file are derived from the following 3GPP standard: 20 21 3GPP TS 26.073 22 ANSI-C code for the Adaptive Multi-Rate (AMR) speech codec 23 Available from http://www.3gpp.org 24 25 (C) 2004, 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TTA, TTC) 26 Permission to distribute, modify and use this file under the standard license 27 terms listed above has been obtained from the copyright holder. 28 ****************************************************************************************/ 29 /* 30 ------------------------------------------------------------------------------ 31 32 33 34 Filename: ol_ltp.h 35 36 ------------------------------------------------------------------------------ 37 INCLUDE DESCRIPTION 38 39 File : ol_ltp.h 40 Purpose : Compute the open loop pitch lag. 41 42 ------------------------------------------------------------------------------ 43 */ 44 45 #ifndef OL_LTP_H 46 #define OL_LTP_H "$Id $" 47 48 /*---------------------------------------------------------------------------- 49 ; INCLUDES 50 ----------------------------------------------------------------------------*/ 51 #include "typedef.h" 52 #include "mode.h" 53 #include "p_ol_wgh.h" 54 55 /*--------------------------------------------------------------------------*/ 56 #ifdef __cplusplus 57 extern "C" 58 { 59 #endif 60 61 /*---------------------------------------------------------------------------- 62 ; MACROS 63 ; [Define module specific macros here] 64 ----------------------------------------------------------------------------*/ 65 66 /*---------------------------------------------------------------------------- 67 ; DEFINES 68 ; [Include all pre-processor statements here.] 69 ----------------------------------------------------------------------------*/ 70 71 /*---------------------------------------------------------------------------- 72 ; EXTERNAL VARIABLES REFERENCES 73 ; [Declare variables used in this module but defined elsewhere] 74 ----------------------------------------------------------------------------*/ 75 76 /*---------------------------------------------------------------------------- 77 ; SIMPLE TYPEDEF'S 78 ----------------------------------------------------------------------------*/ 79 80 /*---------------------------------------------------------------------------- 81 ; ENUMERATED TYPEDEF'S 82 ----------------------------------------------------------------------------*/ 83 84 /*---------------------------------------------------------------------------- 85 ; STRUCTURES TYPEDEF'S 86 ----------------------------------------------------------------------------*/ 87 88 89 /*---------------------------------------------------------------------------- 90 ; GLOBAL FUNCTION DEFINITIONS 91 ; [List function prototypes here] 92 ----------------------------------------------------------------------------*/ 93 void ol_ltp( 94 pitchOLWghtState *st, /* i/o : State struct */ 95 vadState *vadSt, /* i/o : VAD state struct */ 96 enum Mode mode, /* i : coder mode */ 97 Word16 wsp[], /* i : signal used to compute the OL pitch, Q0 */ 98 /* uses signal[-pit_max] to signal[-1] */ 99 Word16 *T_op, /* o : open loop pitch lag, Q0 */ 100 Word16 old_lags[], /* i : history with old stored Cl lags */ 101 Word16 ol_gain_flg[], /* i : OL gain flag */ 102 Word16 idx, /* i : index */ 103 Flag dtx, /* i : dtx flag; use dtx=1, do not use dtx=0 */ 104 Flag *pOverflow /* i/o : overflow Flag */ 105 ); 106 107 108 #ifdef __cplusplus 109 } 110 #endif 111 112 #endif /* _OL_LTP_H_ */ 113 114 115