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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.
*/
/************************************************************************/
/* */
/* Project:: PSA_01_ARMC_01 */
/* $Author: beq07716 $*/
/* $Revision: 1006 $*/
/* $Date: 2010-06-28 14:01:47 +0200 (Mon, 28 Jun 2010) $*/
/* */
/************************************************************************/
#include "LVPSA.h"
#include "LVPSA_Private.h"
#include "LVM_Macros.h"
#include "VectorArithmetic.h"
#define LVM_MININT_32 0x80000000
/************************************************************************************/
/* */
/* FUNCTION: LVPSA_Process */
/* */
/* DESCRIPTION: */
/* The process applies band pass filters to the signal. Each output */
/* feeds a quasi peak filter for level detection. */
/* */
/* PARAMETERS: */
/* hInstance Pointer to the instance */
/* pLVPSA_InputSamples Pointer to the input samples buffer */
/* InputBlockSize Number of mono samples to process */
/* AudioTime Playback time of the input samples */
/* */
/* */
/* RETURNS: */
/* LVPSA_OK Succeeds */
/* otherwise Error due to bad parameters */
/* */
/************************************************************************************/
LVPSA_RETURN LVPSA_Process ( pLVPSA_Handle_t hInstance,
LVM_INT16 *pLVPSA_InputSamples,
LVM_UINT16 InputBlockSize,
LVPSA_Time AudioTime )
{
LVPSA_InstancePr_t *pLVPSA_Inst = (LVPSA_InstancePr_t*)hInstance;
LVM_INT16 *pScratch;
LVM_INT16 ii;
LVM_INT32 AudioTimeInc;
extern LVM_UINT32 LVPSA_SampleRateInvTab[];
LVM_UINT8 *pWrite_Save; /* Position of the write pointer at the beginning of the process */
/******************************************************************************
CHECK PARAMETERS
*******************************************************************************/
if(hInstance == LVM_NULL || pLVPSA_InputSamples == LVM_NULL)
{
return(LVPSA_ERROR_NULLADDRESS);
}
if(InputBlockSize == 0 || InputBlockSize > pLVPSA_Inst->MaxInputBlockSize)
{
return(LVPSA_ERROR_INVALIDPARAM);
}
pScratch = (LVM_INT16*)pLVPSA_Inst->MemoryTable.Region[LVPSA_MEMREGION_SCRATCH].pBaseAddress;
pWrite_Save = pLVPSA_Inst->pSpectralDataBufferWritePointer;
/******************************************************************************
APPLY NEW SETTINGS IF NEEDED
*******************************************************************************/
if (pLVPSA_Inst->bControlPending == LVM_TRUE)
{
pLVPSA_Inst->bControlPending = 0;
LVPSA_ApplyNewSettings( pLVPSA_Inst);
}
/******************************************************************************
PROCESS SAMPLES
*******************************************************************************/
/* Put samples in range [-0.5;0.5[ for BP filters (see Biquads documentation) */
Copy_16( pLVPSA_InputSamples,pScratch,(LVM_INT16)InputBlockSize);
Shift_Sat_v16xv16(-1,pScratch,pScratch,(LVM_INT16)InputBlockSize);
for (ii = 0; ii < pLVPSA_Inst->nRelevantFilters; ii++)
{
switch(pLVPSA_Inst->pBPFiltersPrecision[ii])
{
case LVPSA_SimplePrecisionFilter:
BP_1I_D16F16C14_TRC_WRA_01 ( &pLVPSA_Inst->pBP_Instances[ii],
pScratch,
pScratch + InputBlockSize,
(LVM_INT16)InputBlockSize);
break;
case LVPSA_DoublePrecisionFilter:
BP_1I_D16F32C30_TRC_WRA_01 ( &pLVPSA_Inst->pBP_Instances[ii],
pScratch,
pScratch + InputBlockSize,
(LVM_INT16)InputBlockSize);
break;
default:
break;
}
LVPSA_QPD_Process ( pLVPSA_Inst,
pScratch + InputBlockSize,
(LVM_INT16)InputBlockSize,
ii);
}
/******************************************************************************
UPDATE SpectralDataBufferAudioTime
*******************************************************************************/
if(pLVPSA_Inst->pSpectralDataBufferWritePointer != pWrite_Save)
{
MUL32x32INTO32((AudioTime + (LVM_INT32)((LVM_INT32)pLVPSA_Inst->LocalSamplesCount*1000)),
(LVM_INT32)LVPSA_SampleRateInvTab[pLVPSA_Inst->CurrentParams.Fs],
AudioTimeInc,
LVPSA_FsInvertShift)
pLVPSA_Inst->SpectralDataBufferAudioTime = AudioTime + AudioTimeInc;
}
return(LVPSA_OK);
}
/************************************************************************************/
/* */
/* FUNCTION: LVPSA_GetSpectrum */
/* */
/* DESCRIPTION: */
/* Gets the levels values at a certain point in time */
/* */
/* */
/* PARAMETERS: */
/* hInstance Pointer to the instance */
/* GetSpectrumAudioTime Retrieve the values at this time */
/* pCurrentValues Pointer to a buffer that will contain levels' values */
/* pMaxValues Pointer to a buffer that will contain max levels' values */
/* */
/* */
/* RETURNS: */
/* LVPSA_OK Succeeds */
/* otherwise Error due to bad parameters */
/* */
/************************************************************************************/
LVPSA_RETURN LVPSA_GetSpectrum ( pLVPSA_Handle_t hInstance,
LVPSA_Time GetSpectrumAudioTime,
LVM_UINT8 *pCurrentValues,
LVM_UINT8 *pPeakValues )
{
LVPSA_InstancePr_t *pLVPSA_Inst = (LVPSA_InstancePr_t*)hInstance;
LVM_INT32 StatusDelta, ii;
LVM_UINT8 *pRead;
if(hInstance == LVM_NULL || pCurrentValues == LVM_NULL || pPeakValues == LVM_NULL)
{
return(LVPSA_ERROR_NULLADDRESS);
}
/* First find the place where to look in the status buffer */
if(GetSpectrumAudioTime <= pLVPSA_Inst->SpectralDataBufferAudioTime)
{
MUL32x32INTO32((pLVPSA_Inst->SpectralDataBufferAudioTime - GetSpectrumAudioTime),LVPSA_InternalRefreshTimeInv,StatusDelta,LVPSA_InternalRefreshTimeShift);
if((StatusDelta * LVPSA_InternalRefreshTime) != (pLVPSA_Inst->SpectralDataBufferAudioTime - GetSpectrumAudioTime))
{
StatusDelta += 1;
}
}
else
{
/* This part handles the wrap around */
MUL32x32INTO32(((pLVPSA_Inst->SpectralDataBufferAudioTime - (LVM_INT32)LVM_MININT_32) + ((LVM_INT32)LVM_MAXINT_32 - GetSpectrumAudioTime)),LVPSA_InternalRefreshTimeInv,StatusDelta,LVPSA_InternalRefreshTimeShift)
if(((LVM_INT32)(StatusDelta * LVPSA_InternalRefreshTime)) != ((LVM_INT32)((pLVPSA_Inst->SpectralDataBufferAudioTime - (LVM_INT32)LVM_MININT_32) + ((LVM_INT32)LVM_MAXINT_32 - GetSpectrumAudioTime))))
{
StatusDelta += 1;
}
}
/* Check whether the desired level is not too "old" (see 2.10 in LVPSA_DesignNotes.doc)*/
if(
((GetSpectrumAudioTime < pLVPSA_Inst->SpectralDataBufferAudioTime)&&
((GetSpectrumAudioTime<0)&&(pLVPSA_Inst->SpectralDataBufferAudioTime>0))&&
(((LVM_INT32)(-GetSpectrumAudioTime + pLVPSA_Inst->SpectralDataBufferAudioTime))>LVM_MAXINT_32))||
((GetSpectrumAudioTime > pLVPSA_Inst->SpectralDataBufferAudioTime)&&
(((GetSpectrumAudioTime>=0)&&(pLVPSA_Inst->SpectralDataBufferAudioTime>=0))||
((GetSpectrumAudioTime<=0)&&(pLVPSA_Inst->SpectralDataBufferAudioTime<=0))||
(((GetSpectrumAudioTime>=0)&&(pLVPSA_Inst->SpectralDataBufferAudioTime<=0))&&
(((LVM_INT32)(GetSpectrumAudioTime - pLVPSA_Inst->SpectralDataBufferAudioTime))<LVM_MAXINT_32))))||
(StatusDelta > (LVM_INT32)pLVPSA_Inst->SpectralDataBufferLength) ||
(!StatusDelta))
{
for(ii = 0; ii < pLVPSA_Inst->nBands; ii++)
{
pCurrentValues[ii] = 0;
pPeakValues[ii] = 0;
}
return(LVPSA_OK);
}
/* Set the reading pointer */
if((LVM_INT32)(StatusDelta * pLVPSA_Inst->nBands) > (pLVPSA_Inst->pSpectralDataBufferWritePointer - pLVPSA_Inst->pSpectralDataBufferStart))
{
pRead = pLVPSA_Inst->pSpectralDataBufferWritePointer + (pLVPSA_Inst->SpectralDataBufferLength - (LVM_UINT32)StatusDelta) * pLVPSA_Inst->nBands;
}
else
{
pRead = pLVPSA_Inst->pSpectralDataBufferWritePointer - StatusDelta * pLVPSA_Inst->nBands;
}
/* Read the status buffer and fill the output buffers */
for(ii = 0; ii < pLVPSA_Inst->nBands; ii++)
{
pCurrentValues[ii] = pRead[ii];
if(pLVPSA_Inst->pPreviousPeaks[ii] <= pRead[ii])
{
pLVPSA_Inst->pPreviousPeaks[ii] = pRead[ii];
}
else if(pLVPSA_Inst->pPreviousPeaks[ii] != 0)
{
LVM_INT32 temp;
/*Re-compute max values for decay */
temp = (LVM_INT32)(LVPSA_MAXUNSIGNEDCHAR - pLVPSA_Inst->pPreviousPeaks[ii]);
temp = ((temp * LVPSA_MAXLEVELDECAYFACTOR)>>LVPSA_MAXLEVELDECAYSHIFT);
/* If the gain has no effect, "help" the value to increase */
if(temp == (LVPSA_MAXUNSIGNEDCHAR - pLVPSA_Inst->pPreviousPeaks[ii]))
{
temp += 1;
}
/* Saturate */
temp = (temp > LVPSA_MAXUNSIGNEDCHAR) ? LVPSA_MAXUNSIGNEDCHAR : temp;
/* Store new max level */
pLVPSA_Inst->pPreviousPeaks[ii] = (LVM_UINT8)(LVPSA_MAXUNSIGNEDCHAR - temp);
}
pPeakValues[ii] = pLVPSA_Inst->pPreviousPeaks[ii];
}
return(LVPSA_OK);
}
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