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 /************************************************************************************/
22 /*                                                                                  */
23 /*    Includes                                                                      */
24 /*                                                                                  */
25 /************************************************************************************/
26 
27 #include "Filters.h"                        /* Filter definitions */
28 #include "LVCS_Headphone_Coeffs.h"          /* Headphone coefficients */
29 #include "BIQUAD.h"
30 
31 /************************************************************************************/
32 /*                                                                                  */
33 /*    Structures                                                                    */
34 /*                                                                                  */
35 /************************************************************************************/
36 
37 /* Stereo enhancer structure */
38 typedef struct
39 {
40 
41     /*
42      * Middle filter
43      */
44     void                    (*pBiquadCallBack_Mid)(Biquad_FLOAT_Instance_t*,
45                                     LVM_FLOAT*, LVM_FLOAT*, LVM_INT16);
46 
47     /*
48      * Side filter
49      */
50     void                    (*pBiquadCallBack_Side)(Biquad_FLOAT_Instance_t*,
51                                     LVM_FLOAT*, LVM_FLOAT*, LVM_INT16);
52     LVM_FLOAT              MidGain;            /* Middle gain in mobile speaker mode */
53 } LVCS_StereoEnhancer_t;
54 
55 /************************************************************************************/
56 /*                                                                                  */
57 /*    Function prototypes                                                           */
58 /*                                                                                  */
59 /************************************************************************************/
60 
61 LVCS_ReturnStatus_en LVCS_SEnhancerInit(LVCS_Handle_t        hInstance,
62                                         LVCS_Params_t        *pParams);
63 
64 LVCS_ReturnStatus_en LVCS_StereoEnhancer(LVCS_Handle_t        hInstance,
65                                          const LVM_FLOAT    *pInData,
66                                          LVM_FLOAT            *pOutData,
67                                          LVM_UINT16            NumSamples);
68 
69 #endif  /* STEREOENHANCE_H */
70