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"
#include "ScalarArithmetic.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);
            *dst++ = LVM_Clamp(Temp2 + Temp3);
        }
    }

    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);
            *dst++ = LVM_Clamp(Temp2 + Temp3);
        }
    }
}
/**********************************************************************************/