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/include/ex_ctrl.h
35 
36      Date: 02/08/2002
37 
38 ------------------------------------------------------------------------------
39  REVISION HISTORY
40 
41  Description: Moved _cplusplus #ifdef after Include section.
42 
43  Description:
44 
45 ------------------------------------------------------------------------------
46  INCLUDE DESCRIPTION
47 
48      File             : ex_ctrl.h
49      Purpose          : Excitation Control module in background noise
50 
51 ------------------------------------------------------------------------------
52 */
53 
54 /*----------------------------------------------------------------------------
55 ; CONTINUE ONLY IF NOT ALREADY DEFINED
56 ----------------------------------------------------------------------------*/
57 #ifndef ex_ctrl_h
58 #define ex_ctrl_h "$Id $"
59 
60 /*----------------------------------------------------------------------------
61 ; INCLUDES
62 ----------------------------------------------------------------------------*/
63 #include "typedef.h"
64 #include "cnst.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 #define L_ENERGYHIST 60
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     ; GLOBAL FUNCTION DEFINITIONS
101     ; Function Prototype declaration
102     ----------------------------------------------------------------------------*/
103     /*
104      *  Function    : Ex_ctrl
105      *  Purpose     : Charaterice synthesis speech and detect background noise
106      *  Returns     : background noise decision; 0 = bgn, 1 = no bgn
107      */
108     Word16 Ex_ctrl(Word16 excitation[],    /*i/o: Current subframe excitation   */
109     Word16 excEnergy,      /* i : Exc. Energy, sqrt(totEx*totEx)*/
110     Word16 exEnergyHist[], /* i : History of subframe energies  */
111     Word16 voicedHangover, /* i : # of fr. after last voiced fr.*/
112     Word16 prevBFI,        /* i : Set i previous BFI            */
113     Word16 carefulFlag,    /* i : Restrict dymamic in scaling   */
114     Flag   *pOverflow
115                   );
116 
117     /*----------------------------------------------------------------------------
118     ; END
119     ----------------------------------------------------------------------------*/
120 #ifdef __cplusplus
121 }
122 #endif
123 
124 #endif /* _ex_ctrl_h_ */
125 
126 
127 
128 
129 
130 
131 
132