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 _LVPSA_QPD_H_
19#define _LVPSA_QPD_H_
20
21#include "LVM_Types.h"
22
23
24#ifdef __cplusplus
25extern "C" {
26#endif /* __cplusplus */
27
28typedef struct
29{
30  LVM_INT32                            *pDelay;        /* pointer to the delayed samples (data of 32 bits)   */
31  LVM_INT32                            Coefs[2];       /* pointer to the filter coefficients */
32}QPD_State_t, *pQPD_State_t;
33
34#ifdef BUILD_FLOAT
35typedef struct
36{
37    /* pointer to the delayed samples (data of 32 bits)   */
38    LVM_FLOAT                            *pDelay;
39    LVM_FLOAT                            Coefs[2];       /* pointer to the filter coefficients */
40}QPD_FLOAT_State_t, *pQPD_FLOAT_State_t;
41#endif
42
43typedef struct
44{
45    LVM_INT32 KP;    /*should store a0*/
46    LVM_INT32 KM;    /*should store b2*/
47
48} QPD_C32_Coefs, *PQPD_C32_Coefs;
49
50#ifdef BUILD_FLOAT
51typedef struct
52{
53    LVM_FLOAT KP;    /*should store a0*/
54    LVM_FLOAT KM;    /*should store b2*/
55
56} QPD_FLOAT_Coefs, *PQPD_FLOAT_Coefs;
57#endif
58
59
60typedef struct
61{
62    LVM_INT32 Storage[1];
63
64} QPD_Taps_t, *pQPD_Taps_t;
65
66#ifdef BUILD_FLOAT
67typedef struct
68{
69    LVM_FLOAT Storage[1];
70
71} QPD_FLOAT_Taps_t, *pQPD_FLOAT_Taps_t;
72
73#endif
74/************************************************************************************/
75/*                                                                                  */
76/* FUNCTION:            LVPSA_QPD_Process                                           */
77/*                                                                                  */
78/* DESCRIPTION:                                                                     */
79/*  Apply downsampling, post gain, quasi peak filtering and write the levels values */
80/*  in the buffer every 20 ms.                                                      */
81/*                                                                                  */
82/* PARAMETERS:                                                                      */
83/*                                                                                  */
84/* RETURNS:             void                                                        */
85/*                                                                                  */
86/************************************************************************************/
87void LVPSA_QPD_Process (            void                               *hInstance,
88                                    LVM_INT16                          *pInSamps,
89                                    LVM_INT16                           numSamples,
90                                    LVM_INT16                           BandIndex);
91
92#ifdef BUILD_FLOAT
93void LVPSA_QPD_Process_Float (      void                               *hInstance,
94                                    LVM_FLOAT                          *pInSamps,
95                                    LVM_INT16                           numSamples,
96                                    LVM_INT16                           BandIndex);
97#endif
98/************************************************************************************/
99/*                                                                                  */
100/* FUNCTION:            LVPSA_QPD_Init                                              */
101/*                                                                                  */
102/* DESCRIPTION:                                                                     */
103/*  Initialize a quasi peak filter instance.                                        */
104/*                                                                                  */
105/* PARAMETERS:                                                                      */
106/*  pInstance           Pointer to the instance                                     */
107/*   pTaps               Pointer to the filter's taps                               */
108/*   pCoef               Pointer to the filter's coefficients                       */
109/*                                                                                  */
110/* RETURNS:     void                                                                */
111/*                                                                                  */
112/************************************************************************************/
113void LVPSA_QPD_Init (   QPD_State_t       *pInstance,
114                        QPD_Taps_t        *pTaps,
115                        QPD_C32_Coefs     *pCoef     );
116#ifdef BUILD_FLOAT
117
118void LVPSA_QPD_Init_Float (   QPD_FLOAT_State_t       *pInstance,
119                              QPD_FLOAT_Taps_t        *pTaps,
120                              QPD_FLOAT_Coefs         *pCoef     );
121#endif
122#ifdef __cplusplus
123}
124#endif /* __cplusplus */
125
126#endif
127
128