media/libeffects/lvm/lib/Common/src/Core_MixInSoft_D32C31_SAT.cpp

/*
 * 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.
 */

/**********************************************************************************
   INCLUDE FILES
***********************************************************************************/

#include "Mixer_private.h"
#include "LVM_Macros.h"

/**********************************************************************************
   FUNCTION CORE_MIXSOFT_1ST_D32C31_WRA
***********************************************************************************/

void Core_MixInSoft_D32C31_SAT(     Mix_1St_Cll_FLOAT_t       *pInstance,
                                    const LVM_FLOAT     *src,
                                          LVM_FLOAT     *dst,
                                          LVM_INT16     n)
{
    LVM_FLOAT    Temp1,Temp2,Temp3;
    LVM_INT16     OutLoop;
    LVM_INT16     InLoop;
    LVM_FLOAT    TargetTimesOneMinAlpha;
    LVM_FLOAT    CurrentTimesAlpha;
    LVM_INT16     ii,jj;

    InLoop = (LVM_INT16)(n >> 2); /* Process per 4 samples */
    OutLoop = (LVM_INT16)(n - (InLoop << 2));

    TargetTimesOneMinAlpha = ((1.0f -pInstance->Alpha) * pInstance->Target);
    if (pInstance->Target >= pInstance->Current){
        TargetTimesOneMinAlpha +=(LVM_FLOAT)(2.0f / 2147483647.0f); /* Ceil*/
    }

    if (OutLoop){

        CurrentTimesAlpha = pInstance->Current * pInstance->Alpha;
        pInstance->Current = TargetTimesOneMinAlpha + CurrentTimesAlpha;

        for (ii = OutLoop; ii != 0; ii--){
        Temp1 = *src++;
        Temp2 = *dst;

        Temp3 = Temp1 * (pInstance->Current);
        Temp1 = Temp2 + Temp3;

        if (Temp1 > 1.0f)
            Temp1 = 1.0f;
        else if (Temp1 < -1.0f)
            Temp1 = -1.0f;

        *dst++ = Temp1;
        }
    }

    for (ii = InLoop; ii != 0; ii--){

        CurrentTimesAlpha = pInstance->Current * pInstance->Alpha;
        pInstance->Current = TargetTimesOneMinAlpha + CurrentTimesAlpha;

        for (jj = 4; jj!=0 ; jj--){
            Temp1 = *src++;
            Temp2 = *dst;

            Temp3 = Temp1 * (pInstance->Current);
            Temp1 = Temp2 + Temp3;

            if (Temp1 > 1.0f)
                Temp1 = 1.0f;
            else if (Temp1 < -1.0f)
                Temp1 = -1.0f;
            *dst++ = Temp1;
        }
    }
}
/**********************************************************************************/