diff options
Diffstat (limited to 'media/libeffects/lvm/lib/Common/src/BQ_2I_D32F32C30_TRC_WRA_01.c')
| -rwxr-xr-x | media/libeffects/lvm/lib/Common/src/BQ_2I_D32F32C30_TRC_WRA_01.c | 135 |
1 files changed, 135 insertions, 0 deletions
diff --git a/media/libeffects/lvm/lib/Common/src/BQ_2I_D32F32C30_TRC_WRA_01.c b/media/libeffects/lvm/lib/Common/src/BQ_2I_D32F32C30_TRC_WRA_01.c new file mode 100755 index 0000000..51278cf --- /dev/null +++ b/media/libeffects/lvm/lib/Common/src/BQ_2I_D32F32C30_TRC_WRA_01.c @@ -0,0 +1,135 @@ +/* + * 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:: */ +/* $Author: beq07716 $*/ +/* $Revision: 1000 $*/ +/* $Date: 2010-06-28 13:08:20 +0200 (Mon, 28 Jun 2010) $*/ +/* */ +/************************************************************************/ + +#include "BIQUAD.h" +#include "BQ_2I_D32F32Cll_TRC_WRA_01_Private.h" +#include "LVM_Macros.h" + +/************************************************************************** + ASSUMPTIONS: + COEFS- + pBiquadState->coefs[0] is A2, pBiquadState->coefs[1] is A1 + pBiquadState->coefs[2] is A0, pBiquadState->coefs[3] is -B2 + pBiquadState->coefs[4] is -B1, these are in Q30 format + + DELAYS- + pBiquadState->pDelays[0] is x(n-1)L in Q0 format + pBiquadState->pDelays[1] is x(n-1)R in Q0 format + pBiquadState->pDelays[2] is x(n-2)L in Q0 format + pBiquadState->pDelays[3] is x(n-2)R in Q0 format + pBiquadState->pDelays[4] is y(n-1)L in Q0 format + pBiquadState->pDelays[5] is y(n-1)R in Q0 format + pBiquadState->pDelays[6] is y(n-2)L in Q0 format + pBiquadState->pDelays[7] is y(n-2)R in Q0 format +***************************************************************************/ + +void BQ_2I_D32F32C30_TRC_WRA_01 ( Biquad_Instance_t *pInstance, + LVM_INT32 *pDataIn, + LVM_INT32 *pDataOut, + LVM_INT16 NrSamples) + + + { + LVM_INT32 ynL,ynR,templ,tempd; + LVM_INT16 ii; + PFilter_State pBiquadState = (PFilter_State) pInstance; + + for (ii = NrSamples; ii != 0; ii--) + { + + + /************************************************************************** + PROCESSING OF THE LEFT CHANNEL + ***************************************************************************/ + /* ynL= ( A2 (Q30) * x(n-2)L (Q0) ) >>30 in Q0*/ + MUL32x32INTO32(pBiquadState->coefs[0],pBiquadState->pDelays[2],ynL,30) + + /* ynL+= ( A1 (Q30) * x(n-1)L (Q0) ) >> 30 in Q0*/ + MUL32x32INTO32(pBiquadState->coefs[1],pBiquadState->pDelays[0],templ,30) + ynL+=templ; + + /* ynL+= ( A0 (Q30) * x(n)L (Q0) ) >> 30 in Q0*/ + MUL32x32INTO32(pBiquadState->coefs[2],*pDataIn,templ,30) + ynL+=templ; + + /* ynL+= (-B2 (Q30) * y(n-2)L (Q0) ) >> 30 in Q0*/ + MUL32x32INTO32(pBiquadState->coefs[3],pBiquadState->pDelays[6],templ,30) + ynL+=templ; + + /* ynL+= (-B1 (Q30) * y(n-1)L (Q0) ) >> 30 in Q0 */ + MUL32x32INTO32(pBiquadState->coefs[4],pBiquadState->pDelays[4],templ,30) + ynL+=templ; + + /************************************************************************** + PROCESSING OF THE RIGHT CHANNEL + ***************************************************************************/ + /* ynR= ( A2 (Q30) * x(n-2)R (Q0) ) >> 30 in Q0*/ + MUL32x32INTO32(pBiquadState->coefs[0],pBiquadState->pDelays[3],ynR,30) + + /* ynR+= ( A1 (Q30) * x(n-1)R (Q0) ) >> 30 in Q0*/ + MUL32x32INTO32(pBiquadState->coefs[1],pBiquadState->pDelays[1],templ,30) + ynR+=templ; + + /* ynR+= ( A0 (Q30) * x(n)R (Q0) ) >> 30 in Q0*/ + tempd=*(pDataIn+1); + MUL32x32INTO32(pBiquadState->coefs[2],tempd,templ,30) + ynR+=templ; + + /* ynR+= (-B2 (Q30) * y(n-2)R (Q0) ) >> 30 in Q0*/ + MUL32x32INTO32(pBiquadState->coefs[3],pBiquadState->pDelays[7],templ,30) + ynR+=templ; + + /* ynR+= (-B1 (Q30) * y(n-1)R (Q0) ) >> 30 in Q0 */ + MUL32x32INTO32(pBiquadState->coefs[4],pBiquadState->pDelays[5],templ,30) + ynR+=templ; + + /************************************************************************** + UPDATING THE DELAYS + ***************************************************************************/ + pBiquadState->pDelays[7]=pBiquadState->pDelays[5]; /* y(n-2)R=y(n-1)R*/ + pBiquadState->pDelays[6]=pBiquadState->pDelays[4]; /* y(n-2)L=y(n-1)L*/ + pBiquadState->pDelays[3]=pBiquadState->pDelays[1]; /* x(n-2)R=x(n-1)R*/ + pBiquadState->pDelays[2]=pBiquadState->pDelays[0]; /* x(n-2)L=x(n-1)L*/ + pBiquadState->pDelays[5]=(LVM_INT32)ynR; /* Update y(n-1)R in Q0*/ + pBiquadState->pDelays[4]=(LVM_INT32)ynL; /* Update y(n-1)L in Q0*/ + pBiquadState->pDelays[0]=(*pDataIn); /* Update x(n-1)L in Q0*/ + pDataIn++; + pBiquadState->pDelays[1]=(*pDataIn); /* Update x(n-1)R in Q0*/ + pDataIn++; + + /************************************************************************** + WRITING THE OUTPUT + ***************************************************************************/ + *pDataOut=(LVM_INT32)ynL; /* Write Left output in Q0*/ + pDataOut++; + *pDataOut=(LVM_INT32)ynR; /* Write Right ouput in Q0*/ + pDataOut++; + + + } + + } + |