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/post_pro.h
35 
36      Date: 02/04/2002
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             : post_pro.h
51       Purpose          : Postprocessing of output speech.
52 
53                          - 2nd order high pass filtering with cut
54                            off frequency at 60 Hz.
55                          - Multiplication of output by two.
56 ------------------------------------------------------------------------------
57 */
58 
59 #ifndef _POST_PRO_H_
60 #define _POST_PRO_H_
61 #define post_pro_h "$Id $"
62 
63 /*----------------------------------------------------------------------------
64 ; INCLUDES
65 ----------------------------------------------------------------------------*/
66 #include "typedef.h"
67 
68 /*--------------------------------------------------------------------------*/
69 #ifdef __cplusplus
70 extern "C"
71 {
72 #endif
73 
74     /*----------------------------------------------------------------------------
75     ; MACROS
76     ; [Define module specific macros here]
77     ----------------------------------------------------------------------------*/
78 
79     /*----------------------------------------------------------------------------
80     ; DEFINES
81     ; [Include all pre-processor statements here.]
82     ----------------------------------------------------------------------------*/
83 
84     /*----------------------------------------------------------------------------
85     ; EXTERNAL VARIABLES REFERENCES
86     ; [Declare variables used in this module but defined elsewhere]
87     ----------------------------------------------------------------------------*/
88 
89     /*----------------------------------------------------------------------------
90     ; SIMPLE TYPEDEF'S
91     ----------------------------------------------------------------------------*/
92 
93     /*----------------------------------------------------------------------------
94     ; ENUMERATED TYPEDEF'S
95     ----------------------------------------------------------------------------*/
96 
97     /*----------------------------------------------------------------------------
98     ; STRUCTURES TYPEDEF'S
99     ----------------------------------------------------------------------------*/
100     typedef struct
101     {
102         Word16 y2_hi;
103         Word16 y2_lo;
104         Word16 y1_hi;
105         Word16 y1_lo;
106         Word16 x0;
107         Word16 x1;
108     } Post_ProcessState;
109 
110     /*----------------------------------------------------------------------------
111     ; GLOBAL FUNCTION DEFINITIONS
112     ; [List function prototypes here]
113     ----------------------------------------------------------------------------*/
114 
115     Word16 Post_Process_reset(Post_ProcessState *st);
116     /* reset of Post processing state (i.e. set state memory to zero)
117        returns 0 on success
118      */
119     void Post_Process_exit(Post_ProcessState **st);
120     /* de-initialize Post processing state (i.e. free status struct)
121        stores NULL in *st
122      */
123 
124     void Post_Process(
125         Post_ProcessState *st,  /* i/o : post process state                   */
126         Word16 signal[],        /* i/o : signal                               */
127         Word16 lg,              /* i   : lenght of signal                     */
128         Flag *pOverflow
129     );
130 
131 #ifdef __cplusplus
132 }
133 #endif
134 
135 #endif  /* _POST_PRO_H_ */
136 
137 
138 
139 
140 
141