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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.
*/
/****************************************************************************************/
/* */
/* Includes */
/* */
/****************************************************************************************/
#include "LVREV_Private.h"
#include "VectorArithmetic.h"
/****************************************************************************************/
/* */
/* FUNCTION: LVREV_Process */
/* */
/* DESCRIPTION: */
/* Process function for the LVREV 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: */
/* LVREV_Success Succeeded */
/* LVREV_INVALIDNUMSAMPLES NumSamples was larger than the maximum block size */
/* LVREV_NULLADDRESS When one of hInstance, pInData or pOutData is NULL */
/* */
/* NOTES: */
/* 1. The input and output buffers must be 32-bit aligned */
/* */
/****************************************************************************************/
LVREV_ReturnStatus_en LVREV_Process(LVREV_Handle_t hInstance,
const LVM_INT32 *pInData,
LVM_INT32 *pOutData,
const LVM_UINT16 NumSamples)
{
LVREV_Instance_st *pLVREV_Private = (LVREV_Instance_st *)hInstance;
LVM_INT32 *pInput = (LVM_INT32 *)pInData;
LVM_INT32 *pOutput = pOutData;
LVM_INT32 SamplesToProcess, RemainingSamples, format;
/*
* Check for error conditions
*/
/* Check for NULL pointers */
if((hInstance == LVM_NULL) || (pInData == LVM_NULL) || (pOutData == LVM_NULL))
{
return LVREV_NULLADDRESS;
}
/*
* Apply the new controls settings if required
*/
if(pLVREV_Private->bControlPending == LVM_TRUE)
{
LVREV_ReturnStatus_en errorCode;
/*
* Clear the pending flag and update the control settings
*/
pLVREV_Private->bControlPending = LVM_FALSE;
errorCode = LVREV_ApplyNewSettings (pLVREV_Private);
if(errorCode != LVREV_SUCCESS)
{
return errorCode;
}
}
/*
* Trap the case where the number of samples is zero.
*/
if (NumSamples == 0)
{
return LVREV_SUCCESS;
}
RemainingSamples = (LVM_INT32)NumSamples;
format = 1;
if (pLVREV_Private->CurrentParams.SourceFormat != LVM_MONO)
{
format = 2;
}
while (RemainingSamples!=0)
{
/*
* If OFF copy and reformat the data as necessary
*/
if (pLVREV_Private->CurrentParams.OperatingMode == LVM_MODE_OFF)
{
if((pInput != pOutput) || (pLVREV_Private->CurrentParams.SourceFormat == LVM_MONO))
{
/*
* Copy the data to the output buffer
*/
if (pLVREV_Private->CurrentParams.SourceFormat != LVM_MONO)
{
RemainingSamples = (RemainingSamples << 1); /* Stereo data */
}
Copy_16((LVM_INT16 *)pInput,
(LVM_INT16 *)pOutput,
(LVM_INT16)(RemainingSamples << 1));
}
RemainingSamples = 0;
}
/*
* Process the data
*/
else
{
if(RemainingSamples > pLVREV_Private->MaxBlkLen)
{
SamplesToProcess = pLVREV_Private->MaxBlkLen;
RemainingSamples = (LVM_INT16)(RemainingSamples - SamplesToProcess);
}
else
{
SamplesToProcess = RemainingSamples;
RemainingSamples = 0;
}
ReverbBlock(pInput, pOutput, pLVREV_Private, (LVM_UINT16)SamplesToProcess);
pInput = (LVM_INT32 *)(pInput +(SamplesToProcess*format));
pOutput = (LVM_INT32 *)(pOutput+(SamplesToProcess*format));
}
}
return LVREV_SUCCESS;
}
/****************************************************************************************/
/* */
/* FUNCTION: ReverbBlock */
/* */
/* DESCRIPTION: */
/* Process function for the LVREV 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: */
/* LVREV_Success Succeeded */
/* LVREV_INVALIDNUMSAMPLES NumSamples was larger than the maximum block size */
/* LVREV_NULLADDRESS When one of hInstance, pInData or pOutData is NULL */
/* */
/* NOTES: */
/* 1. The input and output buffers must be 32-bit aligned */
/* */
/****************************************************************************************/
void ReverbBlock(LVM_INT32 *pInput, LVM_INT32 *pOutput, LVREV_Instance_st *pPrivate, LVM_UINT16 NumSamples)
{
LVM_INT16 j, size;
LVM_INT32 *pDelayLine;
LVM_INT32 *pDelayLineInput = pPrivate->pScratch;
LVM_INT32 *pScratch = pPrivate->pScratch;
LVM_INT32 *pIn;
LVM_INT32 *pTemp = pPrivate->pInputSave;
LVM_INT32 NumberOfDelayLines;
/******************************************************************************
* All calculations will go into the buffer pointed to by pTemp, this will *
* then be mixed with the original input to create the final output. *
* *
* When INPLACE processing is selected this must be a temporary buffer and *
* hence this is the worst case, so for simplicity this will ALWAYS be so *
* *
* The input buffer will remain untouched until the output of the mixer if *
* INPLACE processing is selected. *
* *
* The temp buffer will always be NumSamples in size regardless of MONO or *
* STEREO input. In the case of stereo input all processing is done in MONO *
* and the final output is converted to STEREO after the mixer *
******************************************************************************/
if(pPrivate->InstanceParams.NumDelays == LVREV_DELAYLINES_4 )
{
NumberOfDelayLines = 4;
}
else if(pPrivate->InstanceParams.NumDelays == LVREV_DELAYLINES_2 )
{
NumberOfDelayLines = 2;
}
else
{
NumberOfDelayLines = 1;
}
if(pPrivate->CurrentParams.SourceFormat == LVM_MONO)
{
pIn = pInput;
}
else
{
/*
* Stereo to mono conversion
*/
From2iToMono_32( pInput,
pTemp,
(LVM_INT16)NumSamples);
pIn = pTemp;
}
Mult3s_32x16(pIn,
(LVM_INT16)LVREV_HEADROOM,
pTemp,
(LVM_INT16)NumSamples);
/*
* High pass filter
*/
FO_1I_D32F32C31_TRC_WRA_01( &pPrivate->pFastCoef->HPCoefs,
pTemp,
pTemp,
(LVM_INT16)NumSamples);
/*
* Low pass filter
*/
FO_1I_D32F32C31_TRC_WRA_01( &pPrivate->pFastCoef->LPCoefs,
pTemp,
pTemp,
(LVM_INT16)NumSamples);
/*
* Process all delay lines
*/
for(j = 0; j < NumberOfDelayLines; j++)
{
pDelayLine = pPrivate->pScratchDelayLine[j];
/*
* All-pass filter with pop and click suppression
*/
/* Get the smoothed, delayed output. Put it in the output buffer */
MixSoft_2St_D32C31_SAT(&pPrivate->Mixer_APTaps[j],
pPrivate->pOffsetA[j],
pPrivate->pOffsetB[j],
pDelayLine,
(LVM_INT16)NumSamples);
/* Re-align the all pass filter delay buffer and copying the fixed delay data to the AP delay in the process */
Copy_16((LVM_INT16 *)&pPrivate->pDelay_T[j][NumSamples],
(LVM_INT16 *)pPrivate->pDelay_T[j],
(LVM_INT16)((pPrivate->T[j]-NumSamples) << 1)); /* 32-bit data */
/* Apply the smoothed feedback and save to fixed delay input (currently empty) */
MixSoft_1St_D32C31_WRA(&pPrivate->Mixer_SGFeedback[j],
pDelayLine,
&pPrivate->pDelay_T[j][pPrivate->T[j]-NumSamples],
(LVM_INT16)NumSamples);
/* Sum into the AP delay line */
Mac3s_Sat_32x16(&pPrivate->pDelay_T[j][pPrivate->T[j]-NumSamples],
-0x7fff, /* Invert since the feedback coefficient is negative */
&pPrivate->pDelay_T[j][pPrivate->Delay_AP[j]-NumSamples],
(LVM_INT16)NumSamples);
/* Apply smoothed feedforward sand save to fixed delay input (currently empty) */
MixSoft_1St_D32C31_WRA(&pPrivate->Mixer_SGFeedforward[j],
&pPrivate->pDelay_T[j][pPrivate->Delay_AP[j]-NumSamples],
&pPrivate->pDelay_T[j][pPrivate->T[j]-NumSamples],
(LVM_INT16)NumSamples);
/* Sum into the AP output */
Mac3s_Sat_32x16(&pPrivate->pDelay_T[j][pPrivate->T[j]-NumSamples],
0x7fff,
pDelayLine,
(LVM_INT16)NumSamples);
/*
* Feedback gain
*/
MixSoft_1St_D32C31_WRA(&pPrivate->FeedbackMixer[j], pDelayLine, pDelayLine, NumSamples);
/*
* Low pass filter
*/
FO_1I_D32F32C31_TRC_WRA_01( &pPrivate->pFastCoef->RevLPCoefs[j],
pDelayLine,
pDelayLine,
(LVM_INT16)NumSamples);
}
/*
* Apply rotation matrix and delay samples
*/
for(j = 0; j < NumberOfDelayLines; j++)
{
Copy_16( (LVM_INT16*)(pTemp),
(LVM_INT16*)(pDelayLineInput),
(LVM_INT16)(NumSamples << 1));
/*
* Rotation matrix mix
*/
switch(j)
{
case 3:
/*
* Add delay line 1 and 2 contribution
*/
Mac3s_Sat_32x16(pPrivate->pScratchDelayLine[1], -0x8000, pDelayLineInput, (LVM_INT16)NumSamples);
Mac3s_Sat_32x16(pPrivate->pScratchDelayLine[2], -0x8000, pDelayLineInput, (LVM_INT16)NumSamples);
break;
case 2:
/*
* Add delay line 0 and 3 contribution
*/
Mac3s_Sat_32x16(pPrivate->pScratchDelayLine[0], -0x8000, pDelayLineInput, (LVM_INT16)NumSamples);
Mac3s_Sat_32x16(pPrivate->pScratchDelayLine[3], -0x8000, pDelayLineInput, (LVM_INT16)NumSamples);
break;
case 1:
if(pPrivate->InstanceParams.NumDelays == LVREV_DELAYLINES_4)
{
/*
* Add delay line 0 and 3 contribution
*/
Mac3s_Sat_32x16(pPrivate->pScratchDelayLine[0], -0x8000, pDelayLineInput, (LVM_INT16)NumSamples);
Add2_Sat_32x32(pPrivate->pScratchDelayLine[3], pDelayLineInput, (LVM_INT16)NumSamples);
}
else
{
/*
* Add delay line 0 and 1 contribution
*/
Mac3s_Sat_32x16(pPrivate->pScratchDelayLine[0], -0x8000, pDelayLineInput, (LVM_INT16)NumSamples);
Mac3s_Sat_32x16(pPrivate->pScratchDelayLine[1], -0x8000, pDelayLineInput, (LVM_INT16)NumSamples);
}
break;
case 0:
if(pPrivate->InstanceParams.NumDelays == LVREV_DELAYLINES_4)
{
/*
* Add delay line 1 and 2 contribution
*/
Mac3s_Sat_32x16(pPrivate->pScratchDelayLine[1], -0x8000, pDelayLineInput, (LVM_INT16)NumSamples);
Add2_Sat_32x32(pPrivate->pScratchDelayLine[2], pDelayLineInput, (LVM_INT16)NumSamples);
}
else if(pPrivate->InstanceParams.NumDelays == LVREV_DELAYLINES_2)
{
/*
* Add delay line 0 and 1 contribution
*/
Add2_Sat_32x32(pPrivate->pScratchDelayLine[0], pDelayLineInput, (LVM_INT16)NumSamples);
Mac3s_Sat_32x16(pPrivate->pScratchDelayLine[1], -0x8000, pDelayLineInput, (LVM_INT16)NumSamples);
}
else
{
/*
* Add delay line 0 contribution
*/
/* SOURCE DESTINATION*/
Add2_Sat_32x32(pPrivate->pScratchDelayLine[0], pDelayLineInput, (LVM_INT16)NumSamples);
}
break;
default:
break;
}
/*
* Delay samples
*/
Copy_16((LVM_INT16 *)pDelayLineInput,
(LVM_INT16 *)&pPrivate->pDelay_T[j][pPrivate->T[j]-NumSamples],
(LVM_INT16)(NumSamples << 1)); /* 32-bit data */
}
/*
* Create stereo output
*/
switch(pPrivate->InstanceParams.NumDelays)
{
case LVREV_DELAYLINES_4:
Add2_Sat_32x32(pPrivate->pScratchDelayLine[3],
pPrivate->pScratchDelayLine[0],
(LVM_INT16)NumSamples);
Add2_Sat_32x32(pPrivate->pScratchDelayLine[2],
pPrivate->pScratchDelayLine[1],
(LVM_INT16)NumSamples);
if(pPrivate->CurrentParams.SourceFormat != LVM_MONO)
{
JoinTo2i_32x32(pPrivate->pScratchDelayLine[0],
pPrivate->pScratchDelayLine[1],
pTemp,
(LVM_INT16)NumSamples);
}
else
{
Add2_Sat_32x32(pPrivate->pScratchDelayLine[1],
pPrivate->pScratchDelayLine[0],
(LVM_INT16)NumSamples);
/*Apply 3-dB gain in-order to compensate for the gain change in stereo mode*/
Mult3s_32x16(pPrivate->pScratchDelayLine[0],
LVREV_MIN3DB,
pTemp,
(LVM_INT16)NumSamples);
}
break;
case LVREV_DELAYLINES_2:
Copy_16( (LVM_INT16*)pPrivate->pScratchDelayLine[1],
(LVM_INT16*)pScratch,
(LVM_INT16)(NumSamples << 1));
if(pPrivate->CurrentParams.SourceFormat != LVM_MONO)
{
Mac3s_Sat_32x16(pPrivate->pScratchDelayLine[0],
-0x8000,
pScratch,
(LVM_INT16)NumSamples);
}
Add2_Sat_32x32(pPrivate->pScratchDelayLine[1],
pPrivate->pScratchDelayLine[0],
(LVM_INT16)NumSamples);
if(pPrivate->CurrentParams.SourceFormat != LVM_MONO)
{
JoinTo2i_32x32(pPrivate->pScratchDelayLine[0],
pScratch,
pTemp,
(LVM_INT16)NumSamples);
}
else
{
Copy_16( (LVM_INT16*)pPrivate->pScratchDelayLine[0],
(LVM_INT16*)pTemp,
(LVM_INT16)(NumSamples << 1));
}
break;
case LVREV_DELAYLINES_1:
if(pPrivate->CurrentParams.SourceFormat != LVM_MONO)
{
MonoTo2I_32(pPrivate->pScratchDelayLine[0],
pTemp,
(LVM_INT16)NumSamples);
}
else
{
pTemp = pPrivate->pScratchDelayLine[0];
}
break;
default:
break;
}
/*
* Dry/wet mixer
*/
if(pPrivate->CurrentParams.SourceFormat != LVM_MONO)
{
size = (LVM_INT16)(NumSamples << 1);
}
else
{
size = (LVM_INT16)NumSamples;
}
MixSoft_2St_D32C31_SAT(&pPrivate->BypassMixer,
pInput,
pTemp,
pOutput,
size);
/* Apply Gain*/
if(pPrivate->CurrentParams.SourceFormat != LVM_MONO)
{
size = (LVM_INT16)(NumSamples << 1);
}
else
{
size = (LVM_INT16)NumSamples;
}
Shift_Sat_v32xv32 (LVREV_OUTPUTGAIN_SHIFT,
pOutput,
pOutput,
size);
MixSoft_1St_D32C31_WRA(&pPrivate->GainMixer,
pOutput,
pOutput,
size);
return;
}
/* End of file */
|
