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 INCLUDE FILES
20 ***********************************************************************************/
21
22 #include "LVC_Mixer_Private.h"
23 #include "LVM_Macros.h"
24 #include "ScalarArithmetic.h"
25
26 /**********************************************************************************
27 FUNCTION LVCore_MIXSOFT_1ST_D16C31_WRA
28 ***********************************************************************************/
29
LVC_Core_MixSoft_1St_D16C31_WRA(LVMixer3_st * ptrInstance,const LVM_INT16 * src,LVM_INT16 * dst,LVM_INT16 n)30 void LVC_Core_MixSoft_1St_D16C31_WRA( LVMixer3_st *ptrInstance,
31 const LVM_INT16 *src,
32 LVM_INT16 *dst,
33 LVM_INT16 n)
34 {
35 LVM_INT16 OutLoop;
36 LVM_INT16 InLoop;
37 LVM_INT16 CurrentShort;
38 LVM_INT32 ii;
39 Mix_Private_st *pInstance=(Mix_Private_st *)(ptrInstance->PrivateParams);
40 LVM_INT32 Delta=pInstance->Delta;
41 LVM_INT32 Current=pInstance->Current;
42 LVM_INT32 Target=pInstance->Target;
43 LVM_INT32 Temp;
44
45 InLoop = (LVM_INT16)(n >> 2); /* Process per 4 samples */
46 OutLoop = (LVM_INT16)(n - (InLoop << 2));
47
48 if(Current<Target){
49 if (OutLoop){
50 ADD2_SAT_32x32(Current,Delta,Temp); /* Q31 + Q31 into Q31*/
51 Current=Temp;
52 if (Current > Target)
53 Current = Target;
54
55 CurrentShort = (LVM_INT16)(Current>>16); /* From Q31 to Q15*/
56
57 for (ii = OutLoop; ii != 0; ii--){
58 *(dst++) = (LVM_INT16)(((LVM_INT32)*(src++) * (LVM_INT32)CurrentShort)>>15); /* Q15*Q15>>15 into Q15 */
59 }
60 }
61
62 for (ii = InLoop; ii != 0; ii--){
63 ADD2_SAT_32x32(Current,Delta,Temp); /* Q31 + Q31 into Q31*/
64 Current=Temp;
65 if (Current > Target)
66 Current = Target;
67
68 CurrentShort = (LVM_INT16)(Current>>16); /* From Q31 to Q15*/
69
70 *(dst++) = (LVM_INT16)(((LVM_INT32)*(src++) * (LVM_INT32)CurrentShort)>>15); /* Q15*Q15>>15 into Q15 */
71 *(dst++) = (LVM_INT16)(((LVM_INT32)*(src++) * (LVM_INT32)CurrentShort)>>15);
72 *(dst++) = (LVM_INT16)(((LVM_INT32)*(src++) * (LVM_INT32)CurrentShort)>>15);
73 *(dst++) = (LVM_INT16)(((LVM_INT32)*(src++) * (LVM_INT32)CurrentShort)>>15);
74 }
75 }
76 else{
77 if (OutLoop){
78 Current -= Delta; /* Q31 + Q31 into Q31*/
79 if (Current < Target)
80 Current = Target;
81
82 CurrentShort = (LVM_INT16)(Current>>16); /* From Q31 to Q15*/
83
84 for (ii = OutLoop; ii != 0; ii--){
85 *(dst++) = (LVM_INT16)(((LVM_INT32)*(src++) * (LVM_INT32)CurrentShort)>>15); /* Q15*Q15>>15 into Q15 */
86 }
87 }
88
89 for (ii = InLoop; ii != 0; ii--){
90 Current -= Delta; /* Q31 + Q31 into Q31*/
91 if (Current < Target)
92 Current = Target;
93
94 CurrentShort = (LVM_INT16)(Current>>16); /* From Q31 to Q15*/
95
96 *(dst++) = (LVM_INT16)(((LVM_INT32)*(src++) * (LVM_INT32)CurrentShort)>>15); /* Q15*Q15>>15 into Q15 */
97 *(dst++) = (LVM_INT16)(((LVM_INT32)*(src++) * (LVM_INT32)CurrentShort)>>15);
98 *(dst++) = (LVM_INT16)(((LVM_INT32)*(src++) * (LVM_INT32)CurrentShort)>>15);
99 *(dst++) = (LVM_INT16)(((LVM_INT32)*(src++) * (LVM_INT32)CurrentShort)>>15);
100 }
101 }
102 pInstance->Current=Current;
103 }
104
105
106 /**********************************************************************************/
107