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 "Mixer_private.h"
23 #include "LVM_Macros.h"
24
25 /**********************************************************************************
26 FUNCTION CORE_MIXSOFT_1ST_D32C31_WRA
27 ***********************************************************************************/
28
Core_MixInSoft_D32C31_SAT(Mix_1St_Cll_t * pInstance,const LVM_INT32 * src,LVM_INT32 * dst,LVM_INT16 n)29 void Core_MixInSoft_D32C31_SAT( Mix_1St_Cll_t *pInstance,
30 const LVM_INT32 *src,
31 LVM_INT32 *dst,
32 LVM_INT16 n)
33 {
34 LVM_INT32 Temp1,Temp2,Temp3;
35 LVM_INT16 OutLoop;
36 LVM_INT16 InLoop;
37 LVM_INT32 TargetTimesOneMinAlpha;
38 LVM_INT32 CurrentTimesAlpha;
39 LVM_INT16 ii,jj;
40 LVM_INT16 CurrentShort;
41
42 InLoop = (LVM_INT16)(n >> 2); /* Process per 4 samples */
43 OutLoop = (LVM_INT16)(n - (InLoop << 2));
44
45 MUL32x32INTO32((0x7FFFFFFF-pInstance->Alpha),pInstance->Target,TargetTimesOneMinAlpha,31); /* Q31 * Q0 in Q0 */
46 if (pInstance->Target >= pInstance->Current){
47 TargetTimesOneMinAlpha +=2; /* Ceil*/
48 }
49
50 if (OutLoop){
51 MUL32x32INTO32(pInstance->Current,pInstance->Alpha,CurrentTimesAlpha,31); /* Q0 * Q31 in Q0 */
52 pInstance->Current = TargetTimesOneMinAlpha + CurrentTimesAlpha; /* Q0 + Q0 into Q0*/
53 CurrentShort = (LVM_INT16)(pInstance->Current>>16); /* From Q31 to Q15*/
54
55 for (ii = OutLoop; ii != 0; ii--){
56 Temp1=*src++;
57 Temp2=*dst;
58 MUL32x16INTO32(Temp1,CurrentShort,Temp3,15)
59 Temp1=(Temp2>>1)+(Temp3>>1);
60
61 if (Temp1 > 0x3FFFFFFF)
62 Temp1 = 0x7FFFFFFF;
63 else if (Temp1 < - 0x40000000)
64 Temp1 = 0x80000000;
65 else
66 Temp1=(Temp1<<1);
67 *dst++ = Temp1;
68 }
69 }
70
71 for (ii = InLoop; ii != 0; ii--){
72 MUL32x32INTO32(pInstance->Current,pInstance->Alpha,CurrentTimesAlpha,31); /* Q0 * Q31 in Q0 */
73 pInstance->Current = TargetTimesOneMinAlpha + CurrentTimesAlpha; /* Q0 + Q0 into Q0*/
74 CurrentShort = (LVM_INT16)(pInstance->Current>>16); /* From Q31 to Q15*/
75
76 for (jj = 4; jj!=0 ; jj--){
77 Temp1=*src++;
78 Temp2=*dst;
79 MUL32x16INTO32(Temp1,CurrentShort,Temp3,15)
80 Temp1=(Temp2>>1)+(Temp3>>1);
81
82 if (Temp1 > 0x3FFFFFFF)
83 Temp1 = 0x7FFFFFFF;
84 else if (Temp1 < - 0x40000000)
85 Temp1 = 0x80000000;
86 else
87 Temp1=(Temp1<<1);
88 *dst++ = Temp1;
89 }
90 }
91 }
92
93
94 /**********************************************************************************/
95