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 /****************************************************************************************/
19 /* */
20 /* Includes */
21 /* */
22 /****************************************************************************************/
23 #include "LVREV_Private.h"
24 #include "VectorArithmetic.h"
25
26 /****************************************************************************************/
27 /* */
28 /* FUNCTION: LVREV_ClearAudioBuffers */
29 /* */
30 /* DESCRIPTION: */
31 /* This function is used to clear the internal audio buffers of the module. */
32 /* */
33 /* PARAMETERS: */
34 /* hInstance Instance handle */
35 /* */
36 /* RETURNS: */
37 /* LVREV_SUCCESS Initialisation succeeded */
38 /* LVREV_NULLADDRESS Instance is NULL */
39 /* */
40 /* NOTES: */
41 /* 1. This function must not be interrupted by the LVM_Process function */
42 /* */
43 /****************************************************************************************/
LVREV_ClearAudioBuffers(LVREV_Handle_t hInstance)44 LVREV_ReturnStatus_en LVREV_ClearAudioBuffers(LVREV_Handle_t hInstance)
45 {
46
47 LVREV_Instance_st *pLVREV_Private = (LVREV_Instance_st *)hInstance;
48
49 /*
50 * Check for error conditions
51 */
52 /* Check for NULL pointers */
53 if(hInstance == LVM_NULL)
54 {
55 return LVREV_NULLADDRESS;
56 }
57
58 /*
59 * Clear all filter tap data, delay-lines and other signal related data
60 */
61
62 LoadConst_Float(0,
63 (LVM_FLOAT *)&pLVREV_Private->pFastData->HPTaps,
64 2);
65 LoadConst_Float(0,
66 (LVM_FLOAT *)&pLVREV_Private->pFastData->LPTaps,
67 2);
68 if((LVM_UINT16)pLVREV_Private->InstanceParams.NumDelays == LVREV_DELAYLINES_4)
69 {
70 LoadConst_Float(0, (LVM_FLOAT *)&pLVREV_Private->pFastData->RevLPTaps[3], 2);
71 LoadConst_Float(0, (LVM_FLOAT *)&pLVREV_Private->pFastData->RevLPTaps[2], 2);
72 LoadConst_Float(0, (LVM_FLOAT *)&pLVREV_Private->pFastData->RevLPTaps[1], 2);
73 LoadConst_Float(0, (LVM_FLOAT *)&pLVREV_Private->pFastData->RevLPTaps[0], 2);
74
75 LoadConst_Float(0, pLVREV_Private->pDelay_T[3], LVREV_MAX_T3_DELAY);
76 LoadConst_Float(0, pLVREV_Private->pDelay_T[2], LVREV_MAX_T2_DELAY);
77 LoadConst_Float(0, pLVREV_Private->pDelay_T[1], LVREV_MAX_T1_DELAY);
78 LoadConst_Float(0, pLVREV_Private->pDelay_T[0], LVREV_MAX_T0_DELAY);
79 }
80
81 if((LVM_UINT16)pLVREV_Private->InstanceParams.NumDelays >= LVREV_DELAYLINES_2)
82 {
83 LoadConst_Float(0, (LVM_FLOAT *)&pLVREV_Private->pFastData->RevLPTaps[1], 2);
84 LoadConst_Float(0, (LVM_FLOAT *)&pLVREV_Private->pFastData->RevLPTaps[0], 2);
85
86 LoadConst_Float(0, pLVREV_Private->pDelay_T[1], LVREV_MAX_T1_DELAY);
87 LoadConst_Float(0, pLVREV_Private->pDelay_T[0], LVREV_MAX_T0_DELAY);
88 }
89
90 if((LVM_UINT16)pLVREV_Private->InstanceParams.NumDelays >= LVREV_DELAYLINES_1)
91 {
92 LoadConst_Float(0, (LVM_FLOAT *)&pLVREV_Private->pFastData->RevLPTaps[0], 2);
93 LoadConst_Float(0, pLVREV_Private->pDelay_T[0], LVREV_MAX_T0_DELAY);
94 }
95 return LVREV_SUCCESS;
96 }
97
98 /* End of file */
99