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 *      GSM AMR-NB speech codec   R98   Version 7.5.0   March 2, 2001
33 *                                R99   Version 3.2.0
34 *                                REL-4 Version 4.0.0
35 *
36 ********************************************************************************
37 *
38 *      File             : pre_proc.h
39 *      Purpose          : Preprocessing of input speech.
40 *
41 
42  Description:  Replaced "int" and/or "char" with OSCL defined types.
43 
44 ********************************************************************************
45 */
46 #ifndef pre_proc_h
47 #define pre_proc_h "$Id $"
48 
49 /*
50 ********************************************************************************
51 *                         INCLUDE FILES
52 ********************************************************************************
53 */
54 #include "typedef.h"
55 
56 #ifdef __cplusplus
57 extern "C"
58 {
59 #endif
60 
61     /*
62     ********************************************************************************
63     *                         LOCAL VARIABLES AND TABLES
64     ********************************************************************************
65     */
66 
67     /*
68     ********************************************************************************
69     *                         DEFINITION OF DATA TYPES
70     ********************************************************************************
71     */
72     typedef struct
73     {
74         Word16 y2_hi;
75         Word16 y2_lo;
76         Word16 y1_hi;
77         Word16 y1_lo;
78         Word16 x0;
79         Word16 x1;
80     } Pre_ProcessState;
81 
82     /*
83     ********************************************************************************
84     *                         DECLARATION OF PROTOTYPES
85     ********************************************************************************
86     */
87 
88     Word16 Pre_Process_init(Pre_ProcessState **st);
89     /* initialize one instance of the pre processing state.
90        Stores pointer to filter status struct in *st. This pointer has to
91        be passed to Pre_Process in each call.
92        returns 0 on success
93      */
94 
95     Word16 Pre_Process_reset(Pre_ProcessState *st);
96     /* reset of pre processing state (i.e. set state memory to zero)
97        returns 0 on success
98      */
99     void Pre_Process_exit(Pre_ProcessState **st);
100     /* de-initialize pre processing state (i.e. free status struct)
101        stores NULL in *st
102      */
103 
104     void Pre_Process(
105         Pre_ProcessState *st,
106         Word16 signal[],   /* Input/output signal                               */
107         Word16 lg          /* Lenght of signal                                  */
108     );
109 
110 #ifdef __cplusplus
111 }
112 #endif
113 
114 #endif
115