/*
 * 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.
 */

/****************************************************************************************/
/*                                                                                      */
/*  Includes                                                                            */
/*                                                                                      */
/****************************************************************************************/
#include <system/audio.h>

#include "LVM_Private.h"
#include "ScalarArithmetic.h"
#include "VectorArithmetic.h"
#include "LVM_Coeffs.h"

/****************************************************************************************/
/*                                                                                      */
/* FUNCTION:                LVM_Process                                                 */
/*                                                                                      */
/* DESCRIPTION:                                                                         */
/*  Process function for the LifeVibes module.                                          */
/*                                                                                      */
/* PARAMETERS:                                                                          */
/*  hInstance               Instance handle                                             */
/*  pInData                 Pointer to the input data                                   */
/*  pOutData                Pointer to the output data                                  */
/*  NumSamples              Number of samples in the input buffer                       */
/*  AudioTime               Audio Time of the current input buffer in ms                */
/*                                                                                      */
/* RETURNS:                                                                             */
/*  LVM_SUCCESS            Succeeded                                                    */
/*  LVM_INVALIDNUMSAMPLES  When the NumSamples is not a valied multiple in unmanaged    */
/*                         buffer mode                                                  */
/*  LVM_ALIGNMENTERROR     When either the input our output buffers are not 32-bit      */
/*                         aligned in unmanaged mode                                    */
/*  LVM_NULLADDRESS        When one of hInstance, pInData or pOutData is NULL           */
/*                                                                                      */
/* NOTES:                                                                               */
/*                                                                                      */
/****************************************************************************************/
LVM_ReturnStatus_en LVM_Process(LVM_Handle_t hInstance, const LVM_FLOAT* pInData,
                                LVM_FLOAT* pOutData, LVM_UINT16 NumSamples, LVM_UINT32 AudioTime) {
    LVM_Instance_t* pInstance = (LVM_Instance_t*)hInstance;
    LVM_UINT16 SampleCount = NumSamples;
    LVM_FLOAT* pInput = (LVM_FLOAT*)pInData;
    LVM_FLOAT* pToProcess = (LVM_FLOAT*)pInData;
    LVM_FLOAT* pProcessed = pOutData;
    LVM_ReturnStatus_en Status;
    LVM_INT32 NrChannels = pInstance->NrChannels;
    LVM_INT32 ChMask = pInstance->ChMask;
#define NrFrames SampleCount  // alias for clarity

    /*
     * Check if the number of samples is zero
     */
    if (NumSamples == 0) {
        return (LVM_SUCCESS);
    }

    /*
     * Check valid points have been given
     */
    if ((hInstance == LVM_NULL) || (pInData == LVM_NULL) || (pOutData == LVM_NULL)) {
        return (LVM_NULLADDRESS);
    }

    /*
     * For unmanaged mode only
     */
    if (pInstance->InstParams.BufferMode == LVM_UNMANAGED_BUFFERS) {
        /*
         * Check if the number of samples is a good multiple (unmanaged mode only)
         */
        if ((NumSamples % pInstance->BlickSizeMultiple) != 0) {
            return (LVM_INVALIDNUMSAMPLES);
        }

        /*
         * Check the buffer alignment
         */
        if ((((uintptr_t)pInData % 4) != 0) || (((uintptr_t)pOutData % 4) != 0)) {
            return (LVM_ALIGNMENTERROR);
        }
    }

    /*
     * Update new parameters if necessary
     */
    if (pInstance->ControlPending == LVM_TRUE) {
        Status = LVM_ApplyNewSettings(hInstance);
        /* Update the local variable NrChannels from pInstance->NrChannels value */
        NrChannels = pInstance->NrChannels;
        ChMask = pInstance->ChMask;

        if (Status != LVM_SUCCESS) {
            return Status;
        }
    }

    /*
     * Process the data with managed buffers
     */
    while (SampleCount != 0) {
        /*
         * Manage the input buffer and frame processing
         */
        LVM_BufferIn(hInstance, pInput, &pToProcess, &pProcessed, &SampleCount);

        /*
         * Only process data when SampleCount is none zero, a zero count can occur when
         * the BufferIn routine is working in managed mode.
         */
        if (SampleCount != 0) {
            /*
             * Apply ConcertSound if required
             */
            if (pInstance->CS_Active == LVM_TRUE) {
                (void)LVCS_Process(pInstance->hCSInstance, /* Concert Sound instance handle */
                                   pToProcess, pProcessed, SampleCount);
                pToProcess = pProcessed;
            }

            /*
             * Apply volume if required
             */
            if (pInstance->VC_Active != 0) {
                LVC_MixSoft_Mc_D16C31_SAT(&pInstance->VC_Volume, pToProcess, pProcessed,
                                          (LVM_INT16)(NrFrames), NrChannels);
                pToProcess = pProcessed;
            }

            /*
             * Call N-Band equaliser if enabled
             */
            if (pInstance->EQNB_Active == LVM_TRUE) {
                LVEQNB_Process(pInstance->hEQNBInstance, /* N-Band equaliser instance handle */
                               pToProcess, pProcessed, SampleCount);
                pToProcess = pProcessed;
            }

            /*
             * Call bass enhancement if enabled
             */
            if (pInstance->DBE_Active == LVM_TRUE) {
                LVDBE_Process(pInstance->hDBEInstance, /* Dynamic Bass Enhancement \
                                                          instance handle */
                              pToProcess, pProcessed, SampleCount);
                pToProcess = pProcessed;
            }

            /*
             * Bypass mode or everything off, so copy the input to the output
             */
            if (pToProcess != pProcessed) {
                Copy_Float(pToProcess,                          /* Source */
                           pProcessed,                          /* Destination */
                           (LVM_INT16)(NrChannels * NrFrames)); /* Copy all samples */
            }

            /*
             * Apply treble boost if required
             */
            if (pInstance->TE_Active == LVM_TRUE) {
                /*
                 * Apply the filter
                 */
                pInstance->pTEBiquad->process(pProcessed, pProcessed, NrFrames);
                for (auto i = 0; i < NrChannels * NrFrames; i++) {
                    pProcessed[i] = LVM_Clamp(pProcessed[i]);
                }
            }
            /*
             * Volume balance
             */
            LVC_MixSoft_1St_MC_float_SAT(&pInstance->VC_BalanceMix, pProcessed, pProcessed,
                                         NrFrames, NrChannels, ChMask);

            /*
             * Perform Parametric Spectum Analysis
             */
            if ((pInstance->Params.PSA_Enable == LVM_PSA_ON) &&
                (pInstance->InstParams.PSA_Included == LVM_PSA_ON)) {
                FromMcToMono_Float(pProcessed, pInstance->pPSAInput, (LVM_INT16)(NrFrames),
                                   NrChannels);

                LVPSA_Process(pInstance->hPSAInstance, pInstance->pPSAInput,
                              (LVM_UINT16)(SampleCount), AudioTime);
            }

            /*
             * DC removal
             */
            DC_Mc_D16_TRC_WRA_01(&pInstance->DC_RemovalInstance, pProcessed, pProcessed,
                                 (LVM_INT16)NrFrames, NrChannels);
        }
        /*
         * Manage the output buffer
         */
        LVM_BufferOut(hInstance, pOutData, &SampleCount);
    }

    return (LVM_SUCCESS);
}