1 /*
2  * Copyright (C) 2004-2010 NXP Software
3  * Copyright (C) 2010 The Android Open Source Project
4  *
5  * Licensed under the Apache License, Version 2.0 (the "License");
6  * you may not use this file except in compliance with the License.
7  * You may obtain a copy of the License at
8  *
9  *      http://www.apache.org/licenses/LICENSE-2.0
10  *
11  * Unless required by applicable law or agreed to in writing, software
12  * distributed under the License is distributed on an "AS IS" BASIS,
13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14  * See the License for the specific language governing permissions and
15  * limitations under the License.
16  */
17 
18 #ifndef __LVCS_STEREOENHANCER_H__
19 #define __LVCS_STEREOENHANCER_H__
20 
21 #ifdef __cplusplus
22 extern "C" {
23 #endif /* __cplusplus */
24 
25 
26 /************************************************************************************/
27 /*                                                                                  */
28 /*    Includes                                                                      */
29 /*                                                                                  */
30 /************************************************************************************/
31 
32 #include "Filters.h"                        /* Filter definitions */
33 #include "LVCS_Headphone_Coeffs.h"          /* Headphone coefficients */
34 #include "BIQUAD.h"
35 
36 
37 /************************************************************************************/
38 /*                                                                                  */
39 /*    Structures                                                                    */
40 /*                                                                                  */
41 /************************************************************************************/
42 
43 /* Stereo enhancer structure */
44 typedef struct
45 {
46     /*
47      * Middle filter
48      */
49     void                    (*pBiquadCallBack_Mid)(Biquad_Instance_t*, LVM_INT16*, LVM_INT16*, LVM_INT16);
50 
51     /*
52      * Side filter
53      */
54     void                    (*pBiquadCallBack_Side)(Biquad_Instance_t*, LVM_INT16*, LVM_INT16*, LVM_INT16);
55 
56       LVM_UINT16              MidGain;            /* Middle gain in mobile speaker mode */
57 
58 } LVCS_StereoEnhancer_t;
59 
60 
61 /************************************************************************************/
62 /*                                                                                  */
63 /*    Function prototypes                                                           */
64 /*                                                                                  */
65 /************************************************************************************/
66 
67 LVCS_ReturnStatus_en LVCS_SEnhancerInit(LVCS_Handle_t        hInstance,
68                                         LVCS_Params_t        *pParams);
69 
70 LVCS_ReturnStatus_en LVCS_StereoEnhancer(LVCS_Handle_t        hInstance,
71                                          const LVM_INT16    *pInData,
72                                          LVM_INT16            *pOutData,
73                                          LVM_UINT16            NumSamples);
74 
75 
76 #ifdef __cplusplus
77 }
78 #endif /* __cplusplus */
79 
80 #endif  /* STEREOENHANCE_H */
81