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 ****************************************************************************************/
31 Filename: extract_h.cpp
33 ------------------------------------------------------------------------------
34 INPUT AND OUTPUT DEFINITIONS
37 L_var1 = 32 bit long signed integer (Word32 ) whose value falls
38 in the range : 0x8000 0000 <= L_var1 <= 0x7fff ffff.
40 Local Stores/Buffers/Pointers Needed:
43 Global Stores/Buffers/Pointers Needed:
47 L_var1 = Most significant word of input (Word16)
49 Pointers and Buffers Modified:
52 Local Stores Modified:
55 Global Stores Modified:
58 ------------------------------------------------------------------------------
61 This function returns the 16 MSB of the input, L_var1.
63 ------------------------------------------------------------------------------
68 ------------------------------------------------------------------------------
71 [1] basicop2.c, ETS Version 2.0.0, February 8, 1999
73 ------------------------------------------------------------------------------
76 Word16 extract_h (Word32 L_var1)
80 var_out = (Word16) (L_var1 >> 16);
82 multiCounter[currCounter].extract_h++;
87 ------------------------------------------------------------------------------
91 /*----------------------------------------------------------------------------
93 ----------------------------------------------------------------------------*/
96 /*----------------------------------------------------------------------------
98 ; Define module specific macros here
99 ----------------------------------------------------------------------------*/
101 /*----------------------------------------------------------------------------
103 ; Include all pre-processor statements here. Include conditional
104 ; compile variables also.
105 ----------------------------------------------------------------------------*/
107 /*----------------------------------------------------------------------------
108 ; LOCAL FUNCTION DEFINITIONS
109 ; Function Prototype declaration
110 ----------------------------------------------------------------------------*/
112 /*----------------------------------------------------------------------------
113 ; LOCAL STORE/BUFFER/POINTER DEFINITIONS
114 ; Variable declaration - defined here and used outside this module
115 ----------------------------------------------------------------------------*/
117 /*----------------------------------------------------------------------------
118 ; EXTERNAL FUNCTION REFERENCES
119 ; Declare functions defined elsewhere and referenced in this module
120 ----------------------------------------------------------------------------*/
122 /*----------------------------------------------------------------------------
123 ; EXTERNAL GLOBAL STORE/BUFFER/POINTER REFERENCES
124 ; Declare variables used in this module but defined elsewhere
125 ----------------------------------------------------------------------------*/
127 /*----------------------------------------------------------------------------
129 ----------------------------------------------------------------------------*/
130 Word16 extract_h(Word32 L_var1)
132 /*----------------------------------------------------------------------------
133 ; Define all local variables
134 ----------------------------------------------------------------------------*/
136 /*----------------------------------------------------------------------------
138 ----------------------------------------------------------------------------*/
140 /*----------------------------------------------------------------------------
141 ; Return nothing or data or data pointer
142 ----------------------------------------------------------------------------*/
143 return ((Word16)(L_var1 >> 16));