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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: nxp007753 $
$Revision: 1246 $
$Date: 2010-07-16 11:07:10 +0200 (Fri, 16 Jul 2010) $
*************************************************************************************/
/************************************************************************************/
/* */
/* Includes */
/* */
/************************************************************************************/
#include "LVCS.h"
#include "LVCS_Private.h"
#include "LVCS_BypassMix.h"
#include "VectorArithmetic.h"
#include "LVCS_Tables.h"
/****************************************************************************************/
/* */
/* Function Prototypes */
/* */
/****************************************************************************************/
LVM_INT32 LVCS_MixerCallback( LVCS_Handle_t hInstance,
void *pGeneralPurpose,
LVM_INT16 CallbackParam);
/************************************************************************************/
/* */
/* FUNCTION: LVCS_BypassMixInit */
/* */
/* DESCRIPTION: */
/* Initialises the bypass mixer module */
/* */
/* The overall gain of the processed path is set by the gains in the individual */
/* processing blocks and by the effect level gain. */
/* */
/* The unprocessed path must have matching gain for the processed path to ensure */
/* as they are mixed together the correct effect is achieved, this is the value */
/* UnprocLoss. */
/* */
/* The overall gain is corrected by a combination of a shift with saturation and a */
/* linear scaler, loss. The loss ensures the sum in the mixer does not saturate */
/* and also corrects for any excess gain in the shift. */
/* */
/* PARAMETERS: */
/* hInstance Instance Handle */
/* pParams Initialisation parameters */
/* */
/* RETURNS: */
/* LVCS_Success Always succeeds */
/* */
/* NOTES: */
/* */
/************************************************************************************/
LVCS_ReturnStatus_en LVCS_BypassMixInit(LVCS_Handle_t hInstance,
LVCS_Params_t *pParams)
{
LVM_UINT16 Offset;
LVM_UINT32 Gain;
LVCS_Instance_t *pInstance = (LVCS_Instance_t *)hInstance;
LVCS_BypassMix_t *pConfig = (LVCS_BypassMix_t *)&pInstance->BypassMix;
const Gain_t *pOutputGainTable;
LVM_INT32 Current;
/*
* Set the transition gain
*/
if ((pParams->OperatingMode == LVCS_ON) &&
(pInstance->bTimerDone == LVM_TRUE)
&& (LVC_Mixer_GetTarget(&pInstance->MSBypassMixer.MixerStream[1]) != 0x7FFF) /* this indicates an off->on transtion */
)
{
pInstance->TransitionGain = pParams->EffectLevel;
}
else
{
/* Select no effect level */
pInstance->TransitionGain = 0;
}
/*
* Calculate the output gain table offset
*/
Offset = (LVM_UINT16)(pParams->SpeakerType + (pParams->SourceFormat*(1+LVCS_EX_HEADPHONES)));
pOutputGainTable = (Gain_t*)&LVCS_OutputGainTable[0];
/*
* Setup the mixer gain for the processed path
*/
Gain = (LVM_UINT32)(pOutputGainTable[Offset].Loss * pInstance->TransitionGain);
pConfig->Mixer_Instance.MixerStream[0].CallbackParam = 0;
pConfig->Mixer_Instance.MixerStream[0].pCallbackHandle = LVM_NULL;
pConfig->Mixer_Instance.MixerStream[0].pCallBack = LVM_NULL;
pConfig->Mixer_Instance.MixerStream[0].CallbackSet=1;
Current = LVC_Mixer_GetCurrent(&pConfig->Mixer_Instance.MixerStream[0]);
LVC_Mixer_Init(&pConfig->Mixer_Instance.MixerStream[0],(LVM_INT32)(Gain >> 15),Current);
LVC_Mixer_VarSlope_SetTimeConstant(&pConfig->Mixer_Instance.MixerStream[0],LVCS_BYPASS_MIXER_TC,pParams->SampleRate,2);
/*
* Setup the mixer gain for the unprocessed path
*/
Gain = (LVM_UINT32)(pOutputGainTable[Offset].Loss * (0x7FFF - pInstance->TransitionGain));
Gain = (LVM_UINT32)pOutputGainTable[Offset].UnprocLoss * (Gain >> 15);
Current = LVC_Mixer_GetCurrent(&pConfig->Mixer_Instance.MixerStream[1]);
LVC_Mixer_Init(&pConfig->Mixer_Instance.MixerStream[1],(LVM_INT32)(Gain >> 15),Current);
LVC_Mixer_VarSlope_SetTimeConstant(&pConfig->Mixer_Instance.MixerStream[1],LVCS_BYPASS_MIXER_TC,pParams->SampleRate,2);
pConfig->Mixer_Instance.MixerStream[1].CallbackParam = 0;
pConfig->Mixer_Instance.MixerStream[1].pCallbackHandle = hInstance;
pConfig->Mixer_Instance.MixerStream[1].CallbackSet=1;
pConfig->Mixer_Instance.MixerStream[1].pCallBack = LVCS_MixerCallback;
/*
* Setup the output gain shift
*/
pConfig->Output_Shift = pOutputGainTable[Offset].Shift;
/*
* Correct gain for the effect level
*/
{
LVM_INT16 GainCorrect;
LVM_INT32 Gain1;
LVM_INT32 Gain2;
Gain1 = LVC_Mixer_GetTarget(&pConfig->Mixer_Instance.MixerStream[0]);
Gain2 = LVC_Mixer_GetTarget(&pConfig->Mixer_Instance.MixerStream[1]);
/*
* Calculate the gain correction
*/
if (pInstance->Params.CompressorMode == LVM_MODE_ON)
{
GainCorrect = (LVM_INT16)( pInstance->VolCorrect.GainMin
- (((LVM_INT32)pInstance->VolCorrect.GainMin * (LVM_INT32)pInstance->TransitionGain) >> 15)
+ (((LVM_INT32)pInstance->VolCorrect.GainFull * (LVM_INT32)pInstance->TransitionGain) >> 15) );
/*
* Apply the gain correction and shift, note the result is in Q3.13 format
*/
Gain1 = (Gain1 * GainCorrect) << 4;
Gain2 = (Gain2 * GainCorrect) << 4;
}
else
{
Gain1 = Gain1 << 16;
Gain2 = Gain2 << 16;
}
/*
* Set the gain values
*/
pConfig->Output_Shift = pConfig->Output_Shift;
LVC_Mixer_SetTarget(&pConfig->Mixer_Instance.MixerStream[0],Gain1>>16);
LVC_Mixer_VarSlope_SetTimeConstant(&pConfig->Mixer_Instance.MixerStream[0],LVCS_BYPASS_MIXER_TC,pParams->SampleRate,2);
LVC_Mixer_SetTarget(&pConfig->Mixer_Instance.MixerStream[1],Gain2>>16);
LVC_Mixer_VarSlope_SetTimeConstant(&pConfig->Mixer_Instance.MixerStream[1],LVCS_BYPASS_MIXER_TC,pParams->SampleRate,2);
}
return(LVCS_SUCCESS);
}
/************************************************************************************/
/* */
/* FUNCTION: LVCS_BypassMixer */
/* */
/* DESCRIPTION: */
/* Apply Bypass Mix. */
/* */
/* This mixes the processed and unprocessed data streams together to correct the */
/* overall system gain and allow progressive control of the Concert Sound effect. */
/* */
/* When the bypass mixer is enabled the output is the processed signal only and */
/* without gain correction. */
/* */
/* PARAMETERS: */
/* hInstance Instance Handle */
/* pProcessed Pointer to the processed data */
/* pUnprocessed Pointer to the unprocessed data */
/* pOutData Pointer to the output data */
/* NumSamples Number of samples to process */
/* */
/* RETURNS: */
/* LVCS_Success Always succeeds */
/* */
/* NOTES: */
/* */
/************************************************************************************/
LVCS_ReturnStatus_en LVCS_BypassMixer(LVCS_Handle_t hInstance,
const LVM_INT16 *pProcessed,
const LVM_INT16 *pUnprocessed,
LVM_INT16 *pOutData,
LVM_UINT16 NumSamples)
{
LVCS_Instance_t *pInstance = (LVCS_Instance_t *)hInstance;
LVCS_BypassMix_t *pConfig = (LVCS_BypassMix_t *)&pInstance->BypassMix;
/*
* Check if the bypass mixer is enabled
*/
if ((pInstance->Params.OperatingMode & LVCS_BYPASSMIXSWITCH) != 0)
{
/*
* Apply the bypass mix
*/
LVC_MixSoft_2St_D16C31_SAT(&pConfig->Mixer_Instance,
pProcessed,
(LVM_INT16 *) pUnprocessed,
pOutData,
(LVM_INT16)(2*NumSamples));
/*
* Apply output gain correction shift
*/
Shift_Sat_v16xv16 ((LVM_INT16)pConfig->Output_Shift,
(LVM_INT16*)pOutData,
(LVM_INT16*)pOutData,
(LVM_INT16)(2*NumSamples)); /* Left and right*/
}
return(LVCS_SUCCESS);
}
/************************************************************************************/
/* */
/* FUNCTION: LVCS_MixerCallback */
/* */
/************************************************************************************/
LVM_INT32 LVCS_MixerCallback(LVCS_Handle_t hInstance,
void *pGeneralPurpose,
LVM_INT16 CallbackParam)
{
LVCS_Instance_t *pInstance = (LVCS_Instance_t *)hInstance;
LVM_INT32 Target1;
Target1 = LVC_Mixer_GetTarget(&pInstance->MSBypassMixer.MixerStream[0]);
(void)pGeneralPurpose;
/*
* Off transition has completed in Headphone mode
*/
if ((pInstance->OutputDevice == LVCS_HEADPHONE) &&
(pInstance->bInOperatingModeTransition) &&
(Target1 == 0x0000)&& /* this indicates an on->off transition */
(CallbackParam == 0))
{
/* Set operating mode to OFF */
pInstance->Params.OperatingMode = LVCS_OFF;
/* Exit transition state */
pInstance->bInOperatingModeTransition = LVM_FALSE;
/* Signal to the bundle */
if((*pInstance->Capabilities.CallBack) != LVM_NULL){
(*pInstance->Capabilities.CallBack)(pInstance->Capabilities.pBundleInstance,
LVM_NULL,
(ALGORITHM_CS_ID | LVCS_EVENT_ALGOFF));
}
}
if ((pInstance->OutputDevice == LVCS_HEADPHONE) &&
(Target1 == 1) &&
(pInstance->bTimerDone == LVM_TRUE)){
/* Exit transition state */
pInstance->bInOperatingModeTransition = LVM_FALSE;
}
return 1;
}
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