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: /audio/gsm_amr/c/src/include/ol_ltp.h
35 
36      Date: 02/06/2002
37 
38 ------------------------------------------------------------------------------
39  REVISION HISTORY
40 
41  Description:  Replaced "int" and/or "char" with OSCL defined types.
42 
43  Description: Moved _cplusplus #ifdef after Include section.
44 
45  Description:
46 
47 ------------------------------------------------------------------------------
48  INCLUDE DESCRIPTION
49 
50        File             : ol_ltp.h
51        Purpose          : Compute the open loop pitch lag.
52 
53 ------------------------------------------------------------------------------
54 */
55 
56 #ifndef OL_LTP_H
57 #define OL_LTP_H "$Id $"
58 
59 /*----------------------------------------------------------------------------
60 ; INCLUDES
61 ----------------------------------------------------------------------------*/
62 #include "typedef.h"
63 #include "mode.h"
64 #include "p_ol_wgh.h"
65 
66 /*--------------------------------------------------------------------------*/
67 #ifdef __cplusplus
68 extern "C"
69 {
70 #endif
71 
72     /*----------------------------------------------------------------------------
73     ; MACROS
74     ; [Define module specific macros here]
75     ----------------------------------------------------------------------------*/
76 
77     /*----------------------------------------------------------------------------
78     ; DEFINES
79     ; [Include all pre-processor statements here.]
80     ----------------------------------------------------------------------------*/
81 
82     /*----------------------------------------------------------------------------
83     ; EXTERNAL VARIABLES REFERENCES
84     ; [Declare variables used in this module but defined elsewhere]
85     ----------------------------------------------------------------------------*/
86 
87     /*----------------------------------------------------------------------------
88     ; SIMPLE TYPEDEF'S
89     ----------------------------------------------------------------------------*/
90 
91     /*----------------------------------------------------------------------------
92     ; ENUMERATED TYPEDEF'S
93     ----------------------------------------------------------------------------*/
94 
95     /*----------------------------------------------------------------------------
96     ; STRUCTURES TYPEDEF'S
97     ----------------------------------------------------------------------------*/
98 
99 
100     /*----------------------------------------------------------------------------
101     ; GLOBAL FUNCTION DEFINITIONS
102     ; [List function prototypes here]
103     ----------------------------------------------------------------------------*/
104     void ol_ltp(
105         pitchOLWghtState *st, /* i/o : State struct                            */
106         vadState *vadSt,      /* i/o : VAD state struct                        */
107         enum Mode mode,       /* i   : coder mode                              */
108         Word16 wsp[],         /* i   : signal used to compute the OL pitch, Q0 */
109         /*       uses signal[-pit_max] to signal[-1]     */
110         Word16 *T_op,         /* o   : open loop pitch lag,                 Q0 */
111         Word16 old_lags[],    /* i   : history with old stored Cl lags         */
112         Word16 ol_gain_flg[], /* i   : OL gain flag                            */
113         Word16 idx,           /* i   : index                                   */
114         Flag dtx,             /* i   : dtx flag; use dtx=1, do not use dtx=0   */
115         Flag *pOverflow       /* i/o : overflow Flag                           */
116     );
117 
118 
119 #ifdef __cplusplus
120 }
121 #endif
122 
123 #endif  /* _OL_LTP_H_ */
124 
125 
126