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 *      GSM AMR-NB speech codec   R98   Version 7.5.0   March 2, 2001
33 *                                R99   Version 3.2.0
34 *                                REL-4 Version 4.0.0
35 *
36 ********************************************************************************
37 *
38 *      File             : convolve.h
39 *      Purpose          : Perform the convolution between two vectors x[]
40 *                       : and h[] and write the result in the vector y[].
41 *                       : All vectors are of length L and only the first
42 *                       : L samples of the convolution are computed.
43 *
44 ********************************************************************************
45 */
46 #ifndef convolve_h
47 #define convolve_h "$Id $"
48 
49 /*
50 ********************************************************************************
51 *                         INCLUDE FILES
52 ********************************************************************************
53 */
54 #include "typedef.h"
55 
56 #ifdef __cplusplus
57 extern "C"
58 {
59 #endif
60 
61     /*
62     ********************************************************************************
63     *                         DEFINITION OF DATA TYPES
64     ********************************************************************************
65     */
66 
67     /*
68     ********************************************************************************
69     *                         DECLARATION OF PROTOTYPES
70     ********************************************************************************
71     */
72     void Convolve(
73         Word16 x[],        /* (i)  : input vector                               */
74         Word16 h[],        /* (i)  : impulse response                           */
75         Word16 y[],        /* (o)  : output vector                              */
76         Word16 L           /* (i)  : vector size                                */
77     );
78 
79 #ifdef __cplusplus
80 }
81 #endif
82 
83 #endif
84