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/****************************************************************************************
19Portions 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)
26Permission to distribute, modify and use this file under the standard license
27terms 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
70extern "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
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141