1 /* ------------------------------------------------------------------
2 * Copyright (C) 1998-2009 PacketVideo
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
8 * http://www.apache.org/licenses/LICENSE-2.0
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
14 * See the License for the specific language governing permissions
15 * and limitations under the License.
16 * -------------------------------------------------------------------
18 /****************************************************************************************
19 Portions of this file are derived from the following 3GPP standard:
22 ANSI-C code for the Adaptive Multi-Rate (AMR) speech codec
23 Available from http://www.3gpp.org
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 ****************************************************************************************/
30 ------------------------------------------------------------------------------
36 ------------------------------------------------------------------------------
40 Purpose : Excitation Control module in background noise
42 ------------------------------------------------------------------------------
45 /*----------------------------------------------------------------------------
46 ; CONTINUE ONLY IF NOT ALREADY DEFINED
47 ----------------------------------------------------------------------------*/
49 #define ex_ctrl_h "$Id $"
51 /*----------------------------------------------------------------------------
53 ----------------------------------------------------------------------------*/
57 /*--------------------------------------------------------------------------*/
63 /*----------------------------------------------------------------------------
65 ; Define module specific macros here
66 ----------------------------------------------------------------------------*/
68 /*----------------------------------------------------------------------------
70 ; Include all pre-processor statements here.
71 ----------------------------------------------------------------------------*/
72 #define L_ENERGYHIST 60
73 /*----------------------------------------------------------------------------
74 ; EXTERNAL VARIABLES REFERENCES
75 ; Declare variables used in this module but defined elsewhere
76 ----------------------------------------------------------------------------*/
78 /*----------------------------------------------------------------------------
80 ----------------------------------------------------------------------------*/
82 /*----------------------------------------------------------------------------
83 ; ENUMERATED TYPEDEF'S
84 ----------------------------------------------------------------------------*/
86 /*----------------------------------------------------------------------------
87 ; STRUCTURES TYPEDEF'S
88 ----------------------------------------------------------------------------*/
90 /*----------------------------------------------------------------------------
91 ; GLOBAL FUNCTION DEFINITIONS
92 ; Function Prototype declaration
93 ----------------------------------------------------------------------------*/
96 * Purpose : Charaterice synthesis speech and detect background noise
97 * Returns : background noise decision; 0 = bgn, 1 = no bgn
99 Word16 Ex_ctrl(Word16 excitation[], /*i/o: Current subframe excitation */
100 Word16 excEnergy, /* i : Exc. Energy, sqrt(totEx*totEx)*/
101 Word16 exEnergyHist[], /* i : History of subframe energies */
102 Word16 voicedHangover, /* i : # of fr. after last voiced fr.*/
103 Word16 prevBFI, /* i : Set i previous BFI */
104 Word16 carefulFlag, /* i : Restrict dymamic in scaling */
108 /*----------------------------------------------------------------------------
110 ----------------------------------------------------------------------------*/
115 #endif /* _ex_ctrl_h_ */