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 "VectorArithmetic.h"
24 #include "ScalarArithmetic.h"
25
26 /**********************************************************************************
27 DEFINITIONS
28 ***********************************************************************************/
29
30 #define TRUE 1
31 #define FALSE 0
32
33 /**********************************************************************************
34 FUNCTION MIXINSOFT_D16C31_SAT
35 ***********************************************************************************/
36
LVC_MixInSoft_D16C31_SAT(LVMixer3_1St_st * ptrInstance,LVM_INT16 * src,LVM_INT16 * dst,LVM_INT16 n)37 void LVC_MixInSoft_D16C31_SAT( LVMixer3_1St_st *ptrInstance,
38 LVM_INT16 *src,
39 LVM_INT16 *dst,
40 LVM_INT16 n)
41 {
42 char HardMixing = TRUE;
43 LVM_INT32 TargetGain;
44 Mix_Private_st *pInstance=(Mix_Private_st *)(ptrInstance->MixerStream[0].PrivateParams);
45
46 if(n<=0) return;
47
48 /******************************************************************************
49 SOFT MIXING
50 *******************************************************************************/
51 if (pInstance->Current != pInstance->Target)
52 {
53 if(pInstance->Delta == 0x7FFFFFFF){
54 pInstance->Current = pInstance->Target;
55 TargetGain=pInstance->Target>>(16-pInstance->Shift); // TargetGain in Q16.15 format
56 LVC_Mixer_SetTarget(&(ptrInstance->MixerStream[0]),TargetGain);
57 }else if (Abs_32(pInstance->Current-pInstance->Target) < pInstance->Delta){
58 pInstance->Current = pInstance->Target; /* Difference is not significant anymore. Make them equal. */
59 TargetGain=pInstance->Target>>(16-pInstance->Shift); // TargetGain in Q16.15 format
60 LVC_Mixer_SetTarget(&(ptrInstance->MixerStream[0]),TargetGain);
61 }else{
62 /* Soft mixing has to be applied */
63 HardMixing = FALSE;
64 if(pInstance->Shift!=0){
65 Shift_Sat_v16xv16 ((LVM_INT16)pInstance->Shift,src,src,n);
66 LVC_Core_MixInSoft_D16C31_SAT( &(ptrInstance->MixerStream[0]), src, dst, n);
67 }
68 else
69 LVC_Core_MixInSoft_D16C31_SAT( &(ptrInstance->MixerStream[0]), src, dst, n);
70 }
71 }
72
73 /******************************************************************************
74 HARD MIXING
75 *******************************************************************************/
76
77 if (HardMixing){
78 if (pInstance->Target != 0){ /* Nothing to do in case Target = 0 */
79 if ((pInstance->Target>>16) == 0x7FFF){
80 if(pInstance->Shift!=0)
81 Shift_Sat_v16xv16 ((LVM_INT16)pInstance->Shift,src,src,n);
82 Add2_Sat_16x16( src, dst, n );
83 }
84 else{
85 if(pInstance->Shift!=0)
86 Shift_Sat_v16xv16 ((LVM_INT16)pInstance->Shift,src,src,n);
87 Mac3s_Sat_16x16(src,(LVM_INT16)(pInstance->Target>>16),dst,n);
88 pInstance->Current = pInstance->Target; /* In case the LVCore function would have changed the Current value */
89 }
90 }
91 }
92
93
94 /******************************************************************************
95 CALL BACK
96 *******************************************************************************/
97
98 if (ptrInstance->MixerStream[0].CallbackSet){
99 if (Abs_32(pInstance->Current-pInstance->Target) < pInstance->Delta){
100 pInstance->Current = pInstance->Target; /* Difference is not significant anymore. Make them equal. */
101 TargetGain=pInstance->Target>>(16-pInstance->Shift); // TargetGain in Q16.15 format
102 LVC_Mixer_SetTarget(ptrInstance->MixerStream,TargetGain);
103 ptrInstance->MixerStream[0].CallbackSet = FALSE;
104 if (ptrInstance->MixerStream[0].pCallBack != 0){
105 (*ptrInstance->MixerStream[0].pCallBack) ( ptrInstance->MixerStream[0].pCallbackHandle, ptrInstance->MixerStream[0].pGeneralPurpose,ptrInstance->MixerStream[0].CallbackParam );
106 }
107 }
108 }
109
110 }
111
112 /**********************************************************************************/
113