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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.
*/
/****************************************************************************************
$Author: beq06068 $
$Revision: 1401 $
$Date: 2010-08-03 09:52:22 +0200 (Tue, 03 Aug 2010) $
*****************************************************************************************/
/****************************************************************************************/
/* */
/* Includes */
/* */
/****************************************************************************************/
#include "LVDBE.h"
#include "LVDBE_Private.h"
#include "VectorArithmetic.h"
#include "LVDBE_Coeffs.h"
#include "LVDBE_Tables.h"
/****************************************************************************************/
/* */
/* FUNCTION: LVDBE_GetParameters */
/* */
/* DESCRIPTION: */
/* Request the Dynamic Bass Enhancement parameters. The current parameter set is */
/* returned via the parameter pointer. */
/* */
/* PARAMETERS: */
/* hInstance Instance handle */
/* pParams Pointer to an empty parameter structure */
/* */
/* RETURNS: */
/* LVDBE_SUCCESS Always succeeds */
/* */
/* NOTES: */
/* 1. This function may be interrupted by the LVDBE_Process function */
/* */
/****************************************************************************************/
LVDBE_ReturnStatus_en LVDBE_GetParameters(LVDBE_Handle_t hInstance,
LVDBE_Params_t *pParams)
{
LVDBE_Instance_t *pInstance =(LVDBE_Instance_t *)hInstance;
*pParams = pInstance->Params;
return(LVDBE_SUCCESS);
}
/************************************************************************************/
/* */
/* FUNCTION: LVDBE_GetCapabilities */
/* */
/* DESCRIPTION: Dynamic Bass Enhnacement capabilities. The current capabilities are */
/* returned via the pointer. */
/* */
/* PARAMETERS: */
/* hInstance Instance handle */
/* pCapabilities Pointer to an empty capability structure */
/* */
/* RETURNS: */
/* LVDBE_Success Always succeeds */
/* */
/* NOTES: */
/* 1. This function may be interrupted by the LVDBE_Process function */
/* */
/************************************************************************************/
LVDBE_ReturnStatus_en LVDBE_GetCapabilities(LVDBE_Handle_t hInstance,
LVDBE_Capabilities_t *pCapabilities)
{
LVDBE_Instance_t *pInstance =(LVDBE_Instance_t *)hInstance;
*pCapabilities = pInstance->Capabilities;
return(LVDBE_SUCCESS);
}
/************************************************************************************/
/* */
/* FUNCTION: LVDBE_SetFilters */
/* */
/* DESCRIPTION: */
/* Sets the filter coefficients and clears the data history */
/* */
/* PARAMETERS: */
/* pInstance Pointer to the instance */
/* pParams Initialisation parameters */
/* */
/************************************************************************************/
void LVDBE_SetFilters(LVDBE_Instance_t *pInstance,
LVDBE_Params_t *pParams)
{
/*
* Calculate the table offsets
*/
LVM_UINT16 Offset = (LVM_UINT16)((LVM_UINT16)pParams->SampleRate + (LVM_UINT16)(pParams->CentreFrequency * (1+LVDBE_FS_48000)));
/*
* Setup the high pass filter
*/
LoadConst_16(0, /* Clear the history, value 0 */
(void *)&pInstance->pData->HPFTaps, /* Destination Cast to void: \
no dereferencing in function*/
sizeof(pInstance->pData->HPFTaps)/sizeof(LVM_INT16)); /* Number of words */
BQ_2I_D32F32Cll_TRC_WRA_01_Init(&pInstance->pCoef->HPFInstance, /* Initialise the filter */
&pInstance->pData->HPFTaps,
(BQ_C32_Coefs_t *)&LVDBE_HPF_Table[Offset]);
/*
* Setup the band pass filter
*/
LoadConst_16(0, /* Clear the history, value 0 */
(void *)&pInstance->pData->BPFTaps, /* Destination Cast to void:\
no dereferencing in function*/
sizeof(pInstance->pData->BPFTaps)/sizeof(LVM_INT16)); /* Number of words */
BP_1I_D32F32Cll_TRC_WRA_02_Init(&pInstance->pCoef->BPFInstance, /* Initialise the filter */
&pInstance->pData->BPFTaps,
(BP_C32_Coefs_t *)&LVDBE_BPF_Table[Offset]);
}
/************************************************************************************/
/* */
/* FUNCTION: LVDBE_SetAGC */
/* */
/* DESCRIPTION: */
/* Sets the AGC gain level and attack and decay times constants. */
/* */
/* PARAMETERS: */
/* pInstance Pointer to the instance */
/* pParams Initialisation parameters */
/* */
/************************************************************************************/
void LVDBE_SetAGC(LVDBE_Instance_t *pInstance,
LVDBE_Params_t *pParams)
{
/*
* Get the attack and decay time constants
*/
pInstance->pData->AGCInstance.AGC_Attack = LVDBE_AGC_ATTACK_Table[(LVM_UINT16)pParams->SampleRate]; /* Attack multiplier */
pInstance->pData->AGCInstance.AGC_Decay = LVDBE_AGC_DECAY_Table[(LVM_UINT16)pParams->SampleRate]; /* Decay multipler */
/*
* Get the boost gain
*/
if (pParams->HPFSelect == LVDBE_HPF_ON)
{
pInstance->pData->AGCInstance.AGC_MaxGain = LVDBE_AGC_HPFGAIN_Table[(LVM_UINT16)pParams->EffectLevel]; /* High pass filter on */
}
else
{
pInstance->pData->AGCInstance.AGC_MaxGain = LVDBE_AGC_GAIN_Table[(LVM_UINT16)pParams->EffectLevel]; /* High pass filter off */
}
pInstance->pData->AGCInstance.AGC_GainShift = AGC_GAIN_SHIFT;
pInstance->pData->AGCInstance.AGC_Target = AGC_TARGETLEVEL;
}
/************************************************************************************/
/* */
/* FUNCTION: LVDBE_SetVolume */
/* */
/* DESCRIPTION: */
/* Converts the input volume demand from dBs to linear. */
/* */
/* PARAMETERS: */
/* pInstance Pointer to the instance */
/* pParams Initialisation parameters */
/* */
/* NOTES: */
/* 1. The volume should have the following settings: */
/* */
/* DBE Vol Control Volume setting */
/* === =========== =================== */
/* Off Off HeadroomdB */
/* Off On VolumedB+HeadroomdB */
/* On Off HeadroomdB */
/* On On VolumedB+HeadroomdB */
/* */
/************************************************************************************/
void LVDBE_SetVolume(LVDBE_Instance_t *pInstance,
LVDBE_Params_t *pParams)
{
LVM_UINT16 dBShifts; /* 6dB shifts */
LVM_UINT16 dBOffset; /* Table offset */
LVM_INT16 Volume = 0; /* Required volume in dBs */
/*
* Apply the volume if enabled
*/
if (pParams->VolumeControl == LVDBE_VOLUME_ON)
{
/*
* Limit the gain to the maximum allowed
*/
if (pParams->VolumedB > VOLUME_MAX)
{
Volume = VOLUME_MAX;
}
else
{
Volume = pParams->VolumedB;
}
}
/*
* Calculate the required gain and shifts
*/
dBOffset = (LVM_UINT16)(6 + Volume % 6); /* Get the dBs 0-5 */
dBShifts = (LVM_UINT16)(Volume / -6); /* Get the 6dB shifts */
/*
* When DBE is enabled use AGC volume
*/
pInstance->pData->AGCInstance.Target = ((LVM_INT32)LVDBE_VolumeTable[dBOffset] << 16);
pInstance->pData->AGCInstance.Target = pInstance->pData->AGCInstance.Target >> dBShifts;
pInstance->pData->AGCInstance.VolumeTC = LVDBE_VolumeTCTable[(LVM_UINT16)pParams->SampleRate]; /* Volume update time constant */
pInstance->pData->AGCInstance.VolumeShift = VOLUME_SHIFT+1;
/*
* When DBE is disabled use the bypass volume control
*/
if(dBShifts > 0)
{
LVC_Mixer_SetTarget(&pInstance->pData->BypassVolume.MixerStream[0],(((LVM_INT32)LVDBE_VolumeTable[dBOffset]) >> dBShifts));
}
else
{
LVC_Mixer_SetTarget(&pInstance->pData->BypassVolume.MixerStream[0],(LVM_INT32)LVDBE_VolumeTable[dBOffset]);
}
pInstance->pData->BypassVolume.MixerStream[0].CallbackSet = 1;
LVC_Mixer_VarSlope_SetTimeConstant(&pInstance->pData->BypassVolume.MixerStream[0],
LVDBE_MIXER_TC,
(LVM_Fs_en)pInstance->Params.SampleRate,
2);
}
/****************************************************************************************/
/* */
/* FUNCTION: LVDBE_Control */
/* */
/* DESCRIPTION: */
/* Sets or changes the Bass Enhancement parameters. Changing the parameters while the */
/* module is processing signals may have the following side effects: */
/* */
/* General parameters: */
/* =================== */
/* OperatingMode: Changing the mode of operation may cause a change in volume */
/* level or cause pops and clicks. */
/* */
/* SampleRate: Changing the sample rate may cause pops and clicks. */
/* */
/* EffectLevel: Changing the effect level may cause pops and clicks */
/* */
/* CentreFrequency: Changing the centre frequency may cause pops and clicks */
/* */
/* HPFSelect: Selecting/de-selecting the high pass filter may cause pops and */
/* clicks */
/* */
/* VolumedB Changing the volume setting will have no side effects */
/* */
/* */
/* PARAMETERS: */
/* hInstance Instance handle */
/* pParams Pointer to a parameter structure */
/* */
/* RETURNS: */
/* LVDBE_SUCCESS Always succeeds */
/* */
/* NOTES: */
/* 1. This function must not be interrupted by the LVDBE_Process function */
/* */
/****************************************************************************************/
LVDBE_ReturnStatus_en LVDBE_Control(LVDBE_Handle_t hInstance,
LVDBE_Params_t *pParams)
{
LVDBE_Instance_t *pInstance =(LVDBE_Instance_t *)hInstance;
LVMixer3_2St_st *pBypassMixer_Instance = &pInstance->pData->BypassMixer;
/*
* Update the filters
*/
if ((pInstance->Params.SampleRate != pParams->SampleRate) ||
(pInstance->Params.CentreFrequency != pParams->CentreFrequency))
{
LVDBE_SetFilters(pInstance, /* Instance pointer */
pParams); /* New parameters */
}
/*
* Update the AGC is the effect level has changed
*/
if ((pInstance->Params.SampleRate != pParams->SampleRate) ||
(pInstance->Params.EffectLevel != pParams->EffectLevel) ||
(pInstance->Params.HPFSelect != pParams->HPFSelect))
{
LVDBE_SetAGC(pInstance, /* Instance pointer */
pParams); /* New parameters */
LVC_Mixer_SetTimeConstant(&pBypassMixer_Instance->MixerStream[0],
LVDBE_BYPASS_MIXER_TC,pParams->SampleRate,2);
LVC_Mixer_SetTimeConstant(&pBypassMixer_Instance->MixerStream[1],
LVDBE_BYPASS_MIXER_TC,pParams->SampleRate,2);
}
/*
* Update the Volume if the volume demand has changed
*/
if ((pInstance->Params.VolumedB != pParams->VolumedB) ||
(pInstance->Params.SampleRate != pParams->SampleRate) ||
(pInstance->Params.HeadroomdB != pParams->HeadroomdB) ||
(pInstance->Params.VolumeControl != pParams->VolumeControl))
{
LVDBE_SetVolume(pInstance, /* Instance pointer */
pParams); /* New parameters */
}
if (pInstance->Params.OperatingMode==LVDBE_ON && pParams->OperatingMode==LVDBE_OFF)
{
LVC_Mixer_SetTarget(&pInstance->pData->BypassMixer.MixerStream[0],0);
LVC_Mixer_SetTarget(&pInstance->pData->BypassMixer.MixerStream[1],0x00007FFF);
}
if (pInstance->Params.OperatingMode==LVDBE_OFF && pParams->OperatingMode==LVDBE_ON)
{
LVC_Mixer_SetTarget(&pInstance->pData->BypassMixer.MixerStream[0],0x00007FFF);
LVC_Mixer_SetTarget(&pInstance->pData->BypassMixer.MixerStream[1],0);
}
/*
* Update the instance parameters
*/
pInstance->Params = *pParams;
return(LVDBE_SUCCESS);
}
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