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 "BP_1I_D16F16Css_TRC_WRA_01_Private.h" 202c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent#include "LVM_Macros.h" 212c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent 222c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent 232c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent/************************************************************************** 242c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent ASSUMPTIONS: 252c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent COEFS- 262c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent pBiquadState->coefs[0] is A0, 272c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent pBiquadState->coefs[1] is -B2, 282c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent pBiquadState->coefs[2] is -B1, these are in Q14 format 292c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent 302c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent DELAYS- 312c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent pBiquadState->pDelays[0] is x(n-1)L in Q0 format 322c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent pBiquadState->pDelays[1] is x(n-2)L in Q0 format 332c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent pBiquadState->pDelays[2] is y(n-1)L in Q0 format 342c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent pBiquadState->pDelays[3] is y(n-2)L in Q0 format 352c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent***************************************************************************/ 36d7d013446a64c6de9f0f2dfe098a721b140e0b48Ramesh Katuri#ifdef BUILD_FLOAT 37d7d013446a64c6de9f0f2dfe098a721b140e0b48Ramesh Katurivoid BP_1I_D16F16C14_TRC_WRA_01 ( Biquad_FLOAT_Instance_t *pInstance, 38d7d013446a64c6de9f0f2dfe098a721b140e0b48Ramesh Katuri LVM_FLOAT *pDataIn, 39d7d013446a64c6de9f0f2dfe098a721b140e0b48Ramesh Katuri LVM_FLOAT *pDataOut, 40d7d013446a64c6de9f0f2dfe098a721b140e0b48Ramesh Katuri LVM_INT16 NrSamples) 41d7d013446a64c6de9f0f2dfe098a721b140e0b48Ramesh Katuri 42d7d013446a64c6de9f0f2dfe098a721b140e0b48Ramesh Katuri 43d7d013446a64c6de9f0f2dfe098a721b140e0b48Ramesh Katuri { 44d7d013446a64c6de9f0f2dfe098a721b140e0b48Ramesh Katuri LVM_FLOAT ynL; 45d7d013446a64c6de9f0f2dfe098a721b140e0b48Ramesh Katuri LVM_INT16 ii; 46d7d013446a64c6de9f0f2dfe098a721b140e0b48Ramesh Katuri PFilter_State_FLOAT pBiquadState = (PFilter_State_FLOAT) pInstance; 47d7d013446a64c6de9f0f2dfe098a721b140e0b48Ramesh Katuri 48d7d013446a64c6de9f0f2dfe098a721b140e0b48Ramesh Katuri for (ii = NrSamples; ii != 0; ii--) 49d7d013446a64c6de9f0f2dfe098a721b140e0b48Ramesh Katuri { 50d7d013446a64c6de9f0f2dfe098a721b140e0b48Ramesh Katuri 51d7d013446a64c6de9f0f2dfe098a721b140e0b48Ramesh Katuri 52d7d013446a64c6de9f0f2dfe098a721b140e0b48Ramesh Katuri /************************************************************************** 53d7d013446a64c6de9f0f2dfe098a721b140e0b48Ramesh Katuri PROCESSING OF THE LEFT CHANNEL 54d7d013446a64c6de9f0f2dfe098a721b140e0b48Ramesh Katuri ***************************************************************************/ 55d7d013446a64c6de9f0f2dfe098a721b140e0b48Ramesh Katuri // ynL= (A0 * (x(n)L - x(n-2)L ) ) 56d7d013446a64c6de9f0f2dfe098a721b140e0b48Ramesh Katuri ynL = pBiquadState->coefs[0] * ((*pDataIn)-pBiquadState->pDelays[1]); 572c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent 58d7d013446a64c6de9f0f2dfe098a721b140e0b48Ramesh Katuri // ynL+= ((-B2 * y(n-2)L ) ) 59d7d013446a64c6de9f0f2dfe098a721b140e0b48Ramesh Katuri ynL += pBiquadState->coefs[1] * pBiquadState->pDelays[3]; 60d7d013446a64c6de9f0f2dfe098a721b140e0b48Ramesh Katuri 61d7d013446a64c6de9f0f2dfe098a721b140e0b48Ramesh Katuri // ynL+= ((-B1 * y(n-1)L ) ) 62d7d013446a64c6de9f0f2dfe098a721b140e0b48Ramesh Katuri ynL += pBiquadState->coefs[2] * pBiquadState->pDelays[2]; 63d7d013446a64c6de9f0f2dfe098a721b140e0b48Ramesh Katuri 64d7d013446a64c6de9f0f2dfe098a721b140e0b48Ramesh Katuri /************************************************************************** 65d7d013446a64c6de9f0f2dfe098a721b140e0b48Ramesh Katuri UPDATING THE DELAYS 66d7d013446a64c6de9f0f2dfe098a721b140e0b48Ramesh Katuri ***************************************************************************/ 67d7d013446a64c6de9f0f2dfe098a721b140e0b48Ramesh Katuri pBiquadState->pDelays[3] = pBiquadState->pDelays[2]; // y(n-2)L=y(n-1)L 68d7d013446a64c6de9f0f2dfe098a721b140e0b48Ramesh Katuri pBiquadState->pDelays[1] = pBiquadState->pDelays[0]; // x(n-2)L=x(n-1)L 69d7d013446a64c6de9f0f2dfe098a721b140e0b48Ramesh Katuri pBiquadState->pDelays[2] = ynL; // Update y(n-1)L 70d7d013446a64c6de9f0f2dfe098a721b140e0b48Ramesh Katuri pBiquadState->pDelays[0] = (*pDataIn++); // Update x(n-1)L 71d7d013446a64c6de9f0f2dfe098a721b140e0b48Ramesh Katuri 72d7d013446a64c6de9f0f2dfe098a721b140e0b48Ramesh Katuri /************************************************************************** 73d7d013446a64c6de9f0f2dfe098a721b140e0b48Ramesh Katuri WRITING THE OUTPUT 74d7d013446a64c6de9f0f2dfe098a721b140e0b48Ramesh Katuri ***************************************************************************/ 75d7d013446a64c6de9f0f2dfe098a721b140e0b48Ramesh Katuri *pDataOut++=ynL; // Write Left output 76d7d013446a64c6de9f0f2dfe098a721b140e0b48Ramesh Katuri 77d7d013446a64c6de9f0f2dfe098a721b140e0b48Ramesh Katuri } 78d7d013446a64c6de9f0f2dfe098a721b140e0b48Ramesh Katuri 79d7d013446a64c6de9f0f2dfe098a721b140e0b48Ramesh Katuri } 80d7d013446a64c6de9f0f2dfe098a721b140e0b48Ramesh Katuri#else 812c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurentvoid BP_1I_D16F16C14_TRC_WRA_01 ( Biquad_Instance_t *pInstance, 822c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent LVM_INT16 *pDataIn, 832c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent LVM_INT16 *pDataOut, 842c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent LVM_INT16 NrSamples) 852c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent 862c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent 872c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent { 882c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent LVM_INT32 ynL; 892c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent LVM_INT16 ii; 902c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent PFilter_State pBiquadState = (PFilter_State) pInstance; 912c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent 922c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent for (ii = NrSamples; ii != 0; ii--) 932c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent { 942c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent 952c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent 962c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent /************************************************************************** 972c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent PROCESSING OF THE LEFT CHANNEL 982c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent ***************************************************************************/ 992c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent // ynL= (A0 (Q14) * (x(n)L (Q0) - x(n-2)L (Q0) ) ) in Q14 1002c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent ynL=(LVM_INT32)pBiquadState->coefs[0]* ((*pDataIn)-pBiquadState->pDelays[1]); 1012c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent 1022c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent // ynL+= ((-B2 (Q14) * y(n-2)L (Q0) ) ) in Q14 1032c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent ynL+=(LVM_INT32)pBiquadState->coefs[1]*pBiquadState->pDelays[3]; 1042c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent 1052c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent // ynL+= ((-B1 (Q30) * y(n-1)L (Q0) ) ) in Q14 1062c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent ynL+=(LVM_INT32)pBiquadState->coefs[2]*pBiquadState->pDelays[2]; 1072c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent 1082c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent ynL=(LVM_INT16)(ynL>>14); // ynL in Q0 1092c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent /************************************************************************** 1102c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent UPDATING THE DELAYS 1112c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent ***************************************************************************/ 1122c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent pBiquadState->pDelays[3]=pBiquadState->pDelays[2]; // y(n-2)L=y(n-1)L 1132c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent pBiquadState->pDelays[1]=pBiquadState->pDelays[0]; // x(n-2)L=x(n-1)L 1142c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent pBiquadState->pDelays[2]=ynL; // Update y(n-1)L in Q0 1152c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent pBiquadState->pDelays[0]=(*pDataIn++); // Update x(n-1)L in Q0 1162c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent 1172c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent /************************************************************************** 1182c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent WRITING THE OUTPUT 1192c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent ***************************************************************************/ 1202c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent *pDataOut++=(LVM_INT16)ynL; // Write Left output in Q0 1212c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent 1222c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent } 1232c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent 1242c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent } 125d7d013446a64c6de9f0f2dfe098a721b140e0b48Ramesh Katuri#endif 1262c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent 127