diff options
Diffstat (limited to 'media/libeffects/lvm/lib/Common/src/BQ_2I_D16F16C14_TRC_WRA_01.c')
| -rw-r--r-- | media/libeffects/lvm/lib/Common/src/BQ_2I_D16F16C14_TRC_WRA_01.c | 114 |
1 files changed, 0 insertions, 114 deletions
diff --git a/media/libeffects/lvm/lib/Common/src/BQ_2I_D16F16C14_TRC_WRA_01.c b/media/libeffects/lvm/lib/Common/src/BQ_2I_D16F16C14_TRC_WRA_01.c deleted file mode 100644 index 972e704..0000000 --- a/media/libeffects/lvm/lib/Common/src/BQ_2I_D16F16C14_TRC_WRA_01.c +++ /dev/null @@ -1,114 +0,0 @@ -/* - * 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. - */ - -#include "BIQUAD.h" -#include "BQ_2I_D16F16Css_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 Q14 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_D16F16C14_TRC_WRA_01 ( Biquad_Instance_t *pInstance, - LVM_INT16 *pDataIn, - LVM_INT16 *pDataOut, - LVM_INT16 NrSamples) - { - LVM_INT32 ynL,ynR; - LVM_INT16 ii; - PFilter_State pBiquadState = (PFilter_State) pInstance; - - for (ii = NrSamples; ii != 0; ii--) - { - - /************************************************************************** - PROCESSING OF THE LEFT CHANNEL - ***************************************************************************/ - // ynL=A2 (Q14) * x(n-2)L (Q0) in Q14 - ynL=(LVM_INT32)pBiquadState->coefs[0]* pBiquadState->pDelays[2]; - - // ynL+=A1 (Q14) * x(n-1)L (Q0) in Q14 - ynL+=(LVM_INT32)pBiquadState->coefs[1]* pBiquadState->pDelays[0]; - - // ynL+=A0 (Q14) * x(n)L (Q0) in Q14 - ynL+=(LVM_INT32)pBiquadState->coefs[2]* (*pDataIn); - - // ynL+= ( -B2 (Q14) * y(n-2)L (Q0) ) in Q14 - ynL+=(LVM_INT32)pBiquadState->coefs[3]*pBiquadState->pDelays[6]; - - // ynL+=( -B1 (Q14) * y(n-1)L (Q0) ) in Q14 - ynL+=(LVM_INT32)pBiquadState->coefs[4]*pBiquadState->pDelays[4]; - - ynL=ynL>>14; // ynL in Q0 format - - /************************************************************************** - PROCESSING OF THE RIGHT CHANNEL - ***************************************************************************/ - // ynR=A2 (Q14) * x(n-2)R (Q0) in Q14 - ynR=(LVM_INT32)pBiquadState->coefs[0]*pBiquadState->pDelays[3]; - - // ynR+=A1 (Q14) * x(n-1)R (Q0) in Q14 - ynR+=(LVM_INT32)pBiquadState->coefs[1]*pBiquadState->pDelays[1]; - - // ynR+=A0 (Q14) * x(n)R (Q0) in Q14 - ynR+=(LVM_INT32)pBiquadState->coefs[2]*(*(pDataIn+1)); - - // ynR+= ( -B2 (Q14) * y(n-2)R (Q0) ) in Q14 - ynR+=(LVM_INT32)pBiquadState->coefs[3]*pBiquadState->pDelays[7]; - - // ynR+=( -B1 (Q14) * y(n-1)R (Q0) ) in Q14 - ynR+=(LVM_INT32)pBiquadState->coefs[4]*pBiquadState->pDelays[5]; - - ynR=ynR>>14; // ynL in Q0 format - /************************************************************************** - 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]=ynR; // Update y(n-1)R in Q0 - pBiquadState->pDelays[4]=ynL; // Update y(n-1)L in Q0 - pBiquadState->pDelays[0]=(*pDataIn++); // Update x(n-1)L in Q0 - pBiquadState->pDelays[1]=(*pDataIn++); // Update x(n-1)R in Q0 - - /************************************************************************** - WRITING THE OUTPUT - ***************************************************************************/ - *pDataOut++=(LVM_INT16)ynL; // Write Left output in Q0 - *pDataOut++=(LVM_INT16)ynR; // Write Right ouput in Q0 - - - } - - } - |