| /* |
| * 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 "LVEQNB.h" |
| #include "LVEQNB_Private.h" |
| #include "VectorArithmetic.h" |
| #include "BIQUAD.h" |
| |
| |
| /****************************************************************************************/ |
| /* */ |
| /* Defines */ |
| /* */ |
| /****************************************************************************************/ |
| |
| #define SHIFT 13 |
| |
| /****************************************************************************************/ |
| /* */ |
| /* FUNCTION: LVEQNB_Process */ |
| /* */ |
| /* DESCRIPTION: */ |
| /* Process function for the N-Band Equaliser 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 */ |
| /* */ |
| /* RETURNS: */ |
| /* LVEQNB_SUCCESS Succeeded */ |
| /* LVEQNB_NULLADDRESS When hInstance, pInData or pOutData are NULL */ |
| /* LVEQNB_ALIGNMENTERROR When pInData or pOutData are not 32-bit aligned */ |
| /* LVEQNB_TOOMANYSAMPLES NumSamples was larger than the maximum block size */ |
| /* */ |
| /* NOTES: */ |
| /* */ |
| /****************************************************************************************/ |
| |
| LVEQNB_ReturnStatus_en LVEQNB_Process(LVEQNB_Handle_t hInstance, |
| const LVM_INT16 *pInData, |
| LVM_INT16 *pOutData, |
| LVM_UINT16 NumSamples) |
| { |
| |
| LVM_UINT16 i; |
| Biquad_Instance_t *pBiquad; |
| LVEQNB_Instance_t *pInstance = (LVEQNB_Instance_t *)hInstance; |
| LVM_INT32 *pScratch; |
| |
| |
| /* Check for NULL pointers */ |
| if((hInstance == LVM_NULL) || (pInData == LVM_NULL) || (pOutData == LVM_NULL)) |
| { |
| return LVEQNB_NULLADDRESS; |
| } |
| |
| /* Check if the input and output data buffers are 32-bit aligned */ |
| if ((((uintptr_t)pInData % 4) != 0) || (((uintptr_t)pOutData % 4) != 0)) |
| { |
| return LVEQNB_ALIGNMENTERROR; |
| } |
| |
| pScratch = (LVM_INT32 *)pInstance->pFastTemporary; |
| |
| /* |
| * Check the number of samples is not too large |
| */ |
| if (NumSamples > pInstance->Capabilities.MaxBlockSize) |
| { |
| return(LVEQNB_TOOMANYSAMPLES); |
| } |
| |
| if (pInstance->Params.OperatingMode == LVEQNB_ON) |
| { |
| /* |
| * Convert from 16-bit to 32-bit |
| */ |
| Int16LShiftToInt32_16x32((LVM_INT16 *)pInData, /* Source */ |
| pScratch, /* Destination */ |
| (LVM_INT16)(2*NumSamples), /* Left and Right */ |
| SHIFT); /* Scaling shift */ |
| |
| /* |
| * For each section execte the filter unless the gain is 0dB |
| */ |
| if (pInstance->NBands != 0) |
| { |
| for (i=0; i<pInstance->NBands; i++) |
| { |
| /* |
| * Check if band is non-zero dB gain |
| */ |
| if (pInstance->pBandDefinitions[i].Gain != 0) |
| { |
| /* |
| * Get the address of the biquad instance |
| */ |
| pBiquad = &pInstance->pEQNB_FilterState[i]; |
| |
| |
| /* |
| * Select single or double precision as required |
| */ |
| switch (pInstance->pBiquadType[i]) |
| { |
| case LVEQNB_SinglePrecision: |
| { |
| PK_2I_D32F32C14G11_TRC_WRA_01(pBiquad, |
| (LVM_INT32 *)pScratch, |
| (LVM_INT32 *)pScratch, |
| (LVM_INT16)NumSamples); |
| break; |
| } |
| |
| case LVEQNB_DoublePrecision: |
| { |
| PK_2I_D32F32C30G11_TRC_WRA_01(pBiquad, |
| (LVM_INT32 *)pScratch, |
| (LVM_INT32 *)pScratch, |
| (LVM_INT16)NumSamples); |
| break; |
| } |
| default: |
| break; |
| } |
| } |
| } |
| } |
| |
| |
| if(pInstance->bInOperatingModeTransition == LVM_TRUE){ |
| /* |
| * Convert from 32-bit to 16- bit and saturate |
| */ |
| Int32RShiftToInt16_Sat_32x16(pScratch, /* Source */ |
| (LVM_INT16 *)pScratch, /* Destination */ |
| (LVM_INT16)(2*NumSamples), /* Left and Right */ |
| SHIFT); /* Scaling shift */ |
| |
| LVC_MixSoft_2St_D16C31_SAT(&pInstance->BypassMixer, |
| (LVM_INT16 *)pScratch, |
| (LVM_INT16 *)pInData, |
| (LVM_INT16 *)pScratch, |
| (LVM_INT16)(2*NumSamples)); |
| |
| Copy_16((LVM_INT16*)pScratch, /* Source */ |
| pOutData, /* Destination */ |
| (LVM_INT16)(2*NumSamples)); /* Left and Right samples */ |
| } |
| else{ |
| |
| /* |
| * Convert from 32-bit to 16- bit and saturate |
| */ |
| Int32RShiftToInt16_Sat_32x16(pScratch, /* Source */ |
| pOutData, /* Destination */ |
| (LVM_INT16 )(2*NumSamples), /* Left and Right */ |
| SHIFT); /* Scaling shift */ |
| } |
| } |
| else |
| { |
| /* |
| * Mode is OFF so copy the data if necessary |
| */ |
| if (pInData != pOutData) |
| { |
| Copy_16(pInData, /* Source */ |
| pOutData, /* Destination */ |
| (LVM_INT16)(2*NumSamples)); /* Left and Right samples */ |
| } |
| } |
| |
| |
| |
| return(LVEQNB_SUCCESS); |
| |
| } |
