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 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
