1 /* ------------------------------------------------------------------
2 * Copyright (C) 1998-2009 PacketVideo
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
8 * http://www.apache.org/licenses/LICENSE-2.0
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
14 * See the License for the specific language governing permissions
15 * and limitations under the License.
16 * -------------------------------------------------------------------
18 /****************************************************************************************
19 Portions of this file are derived from the following 3GPP standard:
22 ANSI-C code for the Adaptive Multi-Rate (AMR) speech codec
23 Available from http://www.3gpp.org
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 ****************************************************************************************/
30 ------------------------------------------------------------------------------
36 ------------------------------------------------------------------------------
40 Purpose : Compute the open loop pitch lag.
42 ------------------------------------------------------------------------------
46 #define OL_LTP_H "$Id $"
48 /*----------------------------------------------------------------------------
50 ----------------------------------------------------------------------------*/
55 /*--------------------------------------------------------------------------*/
61 /*----------------------------------------------------------------------------
63 ; [Define module specific macros here]
64 ----------------------------------------------------------------------------*/
66 /*----------------------------------------------------------------------------
68 ; [Include all pre-processor statements here.]
69 ----------------------------------------------------------------------------*/
71 /*----------------------------------------------------------------------------
72 ; EXTERNAL VARIABLES REFERENCES
73 ; [Declare variables used in this module but defined elsewhere]
74 ----------------------------------------------------------------------------*/
76 /*----------------------------------------------------------------------------
78 ----------------------------------------------------------------------------*/
80 /*----------------------------------------------------------------------------
81 ; ENUMERATED TYPEDEF'S
82 ----------------------------------------------------------------------------*/
84 /*----------------------------------------------------------------------------
85 ; STRUCTURES TYPEDEF'S
86 ----------------------------------------------------------------------------*/
89 /*----------------------------------------------------------------------------
90 ; GLOBAL FUNCTION DEFINITIONS
91 ; [List function prototypes here]
92 ----------------------------------------------------------------------------*/
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 */
112 #endif /* _OL_LTP_H_ */