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 /* */ 29 /* FUNCTION: LVREV_ClearAudioBuffers */ 30 /* */ 31 /* DESCRIPTION: */ 32 /* This function is used to clear the internal audio buffers of the module. */ 33 /* */ 34 /* PARAMETERS: */ 35 /* hInstance Instance handle */ 36 /* */ 37 /* RETURNS: */ 38 /* LVREV_SUCCESS Initialisation succeeded */ 39 /* LVREV_NULLADDRESS Instance is NULL */ 40 /* */ 41 /* NOTES: */ 42 /* 1. This function must not be interrupted by the LVM_Process function */ 43 /* */ 44 /****************************************************************************************/ 45 LVREV_ReturnStatus_en LVREV_ClearAudioBuffers(LVREV_Handle_t hInstance) 46 { 47 48 LVREV_Instance_st *pLVREV_Private = (LVREV_Instance_st *)hInstance; 49 50 51 /* 52 * Check for error conditions 53 */ 54 /* Check for NULL pointers */ 55 if(hInstance == LVM_NULL) 56 { 57 return LVREV_NULLADDRESS; 58 } 59 60 /* 61 * Clear all filter tap data, delay-lines and other signal related data 62 */ 63 64 65 LoadConst_32(0, 66 (void *)&pLVREV_Private->pFastData->HPTaps, /* Destination Cast to void: no dereferencing in function*/ 67 2); 68 LoadConst_32(0, 69 (void *)&pLVREV_Private->pFastData->LPTaps, /* Destination Cast to void: no dereferencing in function*/ 70 2); 71 72 if((LVM_UINT16)pLVREV_Private->InstanceParams.NumDelays == LVREV_DELAYLINES_4) 73 { 74 LoadConst_32(0, (LVM_INT32 *)&pLVREV_Private->pFastData->RevLPTaps[3], 2); 75 LoadConst_32(0, (LVM_INT32 *)&pLVREV_Private->pFastData->RevLPTaps[2], 2); 76 LoadConst_32(0, (LVM_INT32 *)&pLVREV_Private->pFastData->RevLPTaps[1], 2); 77 LoadConst_32(0, (LVM_INT32 *)&pLVREV_Private->pFastData->RevLPTaps[0], 2); 78 79 LoadConst_32(0,pLVREV_Private->pDelay_T[3], (LVM_INT16)LVREV_MAX_T3_DELAY); 80 LoadConst_32(0,pLVREV_Private->pDelay_T[2], (LVM_INT16)LVREV_MAX_T2_DELAY); 81 LoadConst_32(0,pLVREV_Private->pDelay_T[1], (LVM_INT16)LVREV_MAX_T1_DELAY); 82 LoadConst_32(0,pLVREV_Private->pDelay_T[0], (LVM_INT16)LVREV_MAX_T0_DELAY); 83 84 } 85 86 if((LVM_UINT16)pLVREV_Private->InstanceParams.NumDelays >= LVREV_DELAYLINES_2) 87 { 88 LoadConst_32(0, (LVM_INT32 *)&pLVREV_Private->pFastData->RevLPTaps[1], 2); 89 LoadConst_32(0, (LVM_INT32 *)&pLVREV_Private->pFastData->RevLPTaps[0], 2); 90 91 LoadConst_32(0,pLVREV_Private->pDelay_T[1], (LVM_INT16)LVREV_MAX_T1_DELAY); 92 LoadConst_32(0,pLVREV_Private->pDelay_T[0], (LVM_INT16)LVREV_MAX_T0_DELAY); 93 } 94 95 if((LVM_UINT16)pLVREV_Private->InstanceParams.NumDelays >= LVREV_DELAYLINES_1) 96 { 97 LoadConst_32(0, (LVM_INT32 *)&pLVREV_Private->pFastData->RevLPTaps[0], 2); 98 LoadConst_32(0,pLVREV_Private->pDelay_T[0], (LVM_INT16)LVREV_MAX_T0_DELAY); 99 } 100 101 return LVREV_SUCCESS; 102 } 103 104 /* End of file */ 105
