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/*
* Copyright (C) 2004-2010 NXP Software
* Copyright (C) 2010 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**********************************************************************************
$Author: beq07716 $
$Revision: 1000 $
$Date: 2010-06-28 13:08:20 +0200 (Mon, 28 Jun 2010) $
***********************************************************************************/
/**********************************************************************************
INCLUDE FILES
***********************************************************************************/
#include "LVC_Mixer_Private.h"
#include "LVM_Macros.h"
#include "ScalarArithmetic.h"
/**********************************************************************************
FUNCTION LVCore_MIXSOFT_1ST_D16C31_WRA
***********************************************************************************/
void LVC_Core_MixSoft_1St_D16C31_WRA( LVMixer3_st *ptrInstance,
const LVM_INT16 *src,
LVM_INT16 *dst,
LVM_INT16 n)
{
LVM_INT16 OutLoop;
LVM_INT16 InLoop;
LVM_INT16 CurrentShort;
LVM_INT32 ii;
Mix_Private_st *pInstance=(Mix_Private_st *)(ptrInstance->PrivateParams);
LVM_INT32 Delta=pInstance->Delta;
LVM_INT32 Current=pInstance->Current;
LVM_INT32 Target=pInstance->Target;
LVM_INT32 Temp;
InLoop = (LVM_INT16)(n >> 2); /* Process per 4 samples */
OutLoop = (LVM_INT16)(n - (InLoop << 2));
if(Current<Target){
if (OutLoop){
ADD2_SAT_32x32(Current,Delta,Temp); /* Q31 + Q31 into Q31*/
Current=Temp;
if (Current > Target)
Current = Target;
CurrentShort = (LVM_INT16)(Current>>16); /* From Q31 to Q15*/
for (ii = OutLoop; ii != 0; ii--){
*(dst++) = (LVM_INT16)(((LVM_INT32)*(src++) * (LVM_INT32)CurrentShort)>>15); /* Q15*Q15>>15 into Q15 */
}
}
for (ii = InLoop; ii != 0; ii--){
ADD2_SAT_32x32(Current,Delta,Temp); /* Q31 + Q31 into Q31*/
Current=Temp;
if (Current > Target)
Current = Target;
CurrentShort = (LVM_INT16)(Current>>16); /* From Q31 to Q15*/
*(dst++) = (LVM_INT16)(((LVM_INT32)*(src++) * (LVM_INT32)CurrentShort)>>15); /* Q15*Q15>>15 into Q15 */
*(dst++) = (LVM_INT16)(((LVM_INT32)*(src++) * (LVM_INT32)CurrentShort)>>15);
*(dst++) = (LVM_INT16)(((LVM_INT32)*(src++) * (LVM_INT32)CurrentShort)>>15);
*(dst++) = (LVM_INT16)(((LVM_INT32)*(src++) * (LVM_INT32)CurrentShort)>>15);
}
}
else{
if (OutLoop){
Current -= Delta; /* Q31 + Q31 into Q31*/
if (Current < Target)
Current = Target;
CurrentShort = (LVM_INT16)(Current>>16); /* From Q31 to Q15*/
for (ii = OutLoop; ii != 0; ii--){
*(dst++) = (LVM_INT16)(((LVM_INT32)*(src++) * (LVM_INT32)CurrentShort)>>15); /* Q15*Q15>>15 into Q15 */
}
}
for (ii = InLoop; ii != 0; ii--){
Current -= Delta; /* Q31 + Q31 into Q31*/
if (Current < Target)
Current = Target;
CurrentShort = (LVM_INT16)(Current>>16); /* From Q31 to Q15*/
*(dst++) = (LVM_INT16)(((LVM_INT32)*(src++) * (LVM_INT32)CurrentShort)>>15); /* Q15*Q15>>15 into Q15 */
*(dst++) = (LVM_INT16)(((LVM_INT32)*(src++) * (LVM_INT32)CurrentShort)>>15);
*(dst++) = (LVM_INT16)(((LVM_INT32)*(src++) * (LVM_INT32)CurrentShort)>>15);
*(dst++) = (LVM_INT16)(((LVM_INT32)*(src++) * (LVM_INT32)CurrentShort)>>15);
}
}
pInstance->Current=Current;
}
/**********************************************************************************/
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