12c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent/* 22c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent * Copyright (C) 2004-2010 NXP Software 32c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent * Copyright (C) 2010 The Android Open Source Project 42c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent * 52c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent * Licensed under the Apache License, Version 2.0 (the "License"); 62c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent * you may not use this file except in compliance with the License. 72c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent * You may obtain a copy of the License at 82c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent * 92c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent * http://www.apache.org/licenses/LICENSE-2.0 102c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent * 112c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent * Unless required by applicable law or agreed to in writing, software 122c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent * distributed under the License is distributed on an "AS IS" BASIS, 132c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 142c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent * See the License for the specific language governing permissions and 152c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent * limitations under the License. 162c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent */ 172c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent 182c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent#include "BIQUAD.h" 192c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent#include "BQ_2I_D32F32Cll_TRC_WRA_01_Private.h" 202c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent#include "LVM_Macros.h" 212c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent 222c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent/************************************************************************** 232c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent ASSUMPTIONS: 242c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent COEFS- 252c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent pBiquadState->coefs[0] is A2, pBiquadState->coefs[1] is A1 262c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent pBiquadState->coefs[2] is A0, pBiquadState->coefs[3] is -B2 272c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent pBiquadState->coefs[4] is -B1, these are in Q30 format 282c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent 292c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent DELAYS- 302c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent pBiquadState->pDelays[0] is x(n-1)L in Q0 format 312c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent pBiquadState->pDelays[1] is x(n-1)R in Q0 format 322c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent pBiquadState->pDelays[2] is x(n-2)L in Q0 format 332c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent pBiquadState->pDelays[3] is x(n-2)R in Q0 format 342c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent pBiquadState->pDelays[4] is y(n-1)L in Q0 format 352c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent pBiquadState->pDelays[5] is y(n-1)R in Q0 format 362c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent pBiquadState->pDelays[6] is y(n-2)L in Q0 format 372c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent pBiquadState->pDelays[7] is y(n-2)R in Q0 format 382c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent***************************************************************************/ 392c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent 402c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurentvoid BQ_2I_D32F32C30_TRC_WRA_01 ( Biquad_Instance_t *pInstance, 412c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent LVM_INT32 *pDataIn, 422c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent LVM_INT32 *pDataOut, 432c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent LVM_INT16 NrSamples) 442c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent 452c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent 462c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent { 472c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent LVM_INT32 ynL,ynR,templ,tempd; 482c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent LVM_INT16 ii; 492c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent PFilter_State pBiquadState = (PFilter_State) pInstance; 502c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent 512c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent for (ii = NrSamples; ii != 0; ii--) 522c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent { 532c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent 542c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent 552c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent /************************************************************************** 562c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent PROCESSING OF THE LEFT CHANNEL 572c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent ***************************************************************************/ 582c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent /* ynL= ( A2 (Q30) * x(n-2)L (Q0) ) >>30 in Q0*/ 592c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent MUL32x32INTO32(pBiquadState->coefs[0],pBiquadState->pDelays[2],ynL,30) 602c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent 612c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent /* ynL+= ( A1 (Q30) * x(n-1)L (Q0) ) >> 30 in Q0*/ 622c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent MUL32x32INTO32(pBiquadState->coefs[1],pBiquadState->pDelays[0],templ,30) 632c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent ynL+=templ; 642c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent 652c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent /* ynL+= ( A0 (Q30) * x(n)L (Q0) ) >> 30 in Q0*/ 662c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent MUL32x32INTO32(pBiquadState->coefs[2],*pDataIn,templ,30) 672c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent ynL+=templ; 682c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent 692c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent /* ynL+= (-B2 (Q30) * y(n-2)L (Q0) ) >> 30 in Q0*/ 702c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent MUL32x32INTO32(pBiquadState->coefs[3],pBiquadState->pDelays[6],templ,30) 712c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent ynL+=templ; 722c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent 732c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent /* ynL+= (-B1 (Q30) * y(n-1)L (Q0) ) >> 30 in Q0 */ 742c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent MUL32x32INTO32(pBiquadState->coefs[4],pBiquadState->pDelays[4],templ,30) 752c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent ynL+=templ; 762c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent 772c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent /************************************************************************** 782c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent PROCESSING OF THE RIGHT CHANNEL 792c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent ***************************************************************************/ 802c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent /* ynR= ( A2 (Q30) * x(n-2)R (Q0) ) >> 30 in Q0*/ 812c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent MUL32x32INTO32(pBiquadState->coefs[0],pBiquadState->pDelays[3],ynR,30) 822c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent 832c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent /* ynR+= ( A1 (Q30) * x(n-1)R (Q0) ) >> 30 in Q0*/ 842c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent MUL32x32INTO32(pBiquadState->coefs[1],pBiquadState->pDelays[1],templ,30) 852c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent ynR+=templ; 862c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent 872c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent /* ynR+= ( A0 (Q30) * x(n)R (Q0) ) >> 30 in Q0*/ 882c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent tempd=*(pDataIn+1); 892c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent MUL32x32INTO32(pBiquadState->coefs[2],tempd,templ,30) 902c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent ynR+=templ; 912c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent 922c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent /* ynR+= (-B2 (Q30) * y(n-2)R (Q0) ) >> 30 in Q0*/ 932c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent MUL32x32INTO32(pBiquadState->coefs[3],pBiquadState->pDelays[7],templ,30) 942c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent ynR+=templ; 952c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent 962c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent /* ynR+= (-B1 (Q30) * y(n-1)R (Q0) ) >> 30 in Q0 */ 972c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent MUL32x32INTO32(pBiquadState->coefs[4],pBiquadState->pDelays[5],templ,30) 982c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent ynR+=templ; 992c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent 1002c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent /************************************************************************** 1012c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent UPDATING THE DELAYS 1022c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent ***************************************************************************/ 1032c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent pBiquadState->pDelays[7]=pBiquadState->pDelays[5]; /* y(n-2)R=y(n-1)R*/ 1042c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent pBiquadState->pDelays[6]=pBiquadState->pDelays[4]; /* y(n-2)L=y(n-1)L*/ 1052c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent pBiquadState->pDelays[3]=pBiquadState->pDelays[1]; /* x(n-2)R=x(n-1)R*/ 1062c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent pBiquadState->pDelays[2]=pBiquadState->pDelays[0]; /* x(n-2)L=x(n-1)L*/ 1072c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent pBiquadState->pDelays[5]=(LVM_INT32)ynR; /* Update y(n-1)R in Q0*/ 1082c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent pBiquadState->pDelays[4]=(LVM_INT32)ynL; /* Update y(n-1)L in Q0*/ 1092c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent pBiquadState->pDelays[0]=(*pDataIn); /* Update x(n-1)L in Q0*/ 1102c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent pDataIn++; 1112c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent pBiquadState->pDelays[1]=(*pDataIn); /* Update x(n-1)R in Q0*/ 1122c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent pDataIn++; 1132c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent 1142c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent /************************************************************************** 1152c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent WRITING THE OUTPUT 1162c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent ***************************************************************************/ 1172c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent *pDataOut=(LVM_INT32)ynL; /* Write Left output in Q0*/ 1182c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent pDataOut++; 1192c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent *pDataOut=(LVM_INT32)ynR; /* Write Right ouput in Q0*/ 1202c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent pDataOut++; 1212c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent 1222c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent 1232c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent } 1242c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent 1252c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent } 1262c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent 127