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
29void 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