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 "FO_1I_D16F16Css_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 A1, 262c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent pBiquadState->coefs[1] is A0, 272c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent pBiquadState->coefs[2] is -B1, these are in Q15 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 y(n-1)L in Q0 format 322c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent***************************************************************************/ 332c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent 34d7d013446a64c6de9f0f2dfe098a721b140e0b48Ramesh Katuri#ifdef BUILD_FLOAT 35d7d013446a64c6de9f0f2dfe098a721b140e0b48Ramesh Katurivoid FO_1I_D16F16C15_TRC_WRA_01( Biquad_FLOAT_Instance_t *pInstance, 36d7d013446a64c6de9f0f2dfe098a721b140e0b48Ramesh Katuri LVM_FLOAT *pDataIn, 37d7d013446a64c6de9f0f2dfe098a721b140e0b48Ramesh Katuri LVM_FLOAT *pDataOut, 38d7d013446a64c6de9f0f2dfe098a721b140e0b48Ramesh Katuri LVM_INT16 NrSamples) 39d7d013446a64c6de9f0f2dfe098a721b140e0b48Ramesh Katuri { 40d7d013446a64c6de9f0f2dfe098a721b140e0b48Ramesh Katuri LVM_FLOAT ynL; 41d7d013446a64c6de9f0f2dfe098a721b140e0b48Ramesh Katuri LVM_INT16 ii; 42d7d013446a64c6de9f0f2dfe098a721b140e0b48Ramesh Katuri PFilter_State_FLOAT pBiquadState = (PFilter_State_FLOAT) pInstance; 43d7d013446a64c6de9f0f2dfe098a721b140e0b48Ramesh Katuri 44d7d013446a64c6de9f0f2dfe098a721b140e0b48Ramesh Katuri for (ii = NrSamples; ii != 0; ii--) 45d7d013446a64c6de9f0f2dfe098a721b140e0b48Ramesh Katuri { 46d7d013446a64c6de9f0f2dfe098a721b140e0b48Ramesh Katuri 47d7d013446a64c6de9f0f2dfe098a721b140e0b48Ramesh Katuri /************************************************************************** 48d7d013446a64c6de9f0f2dfe098a721b140e0b48Ramesh Katuri PROCESSING OF THE LEFT CHANNEL 49d7d013446a64c6de9f0f2dfe098a721b140e0b48Ramesh Katuri ***************************************************************************/ 50d7d013446a64c6de9f0f2dfe098a721b140e0b48Ramesh Katuri // ynL=A1 * x(n-1)L 51d7d013446a64c6de9f0f2dfe098a721b140e0b48Ramesh Katuri ynL = (LVM_FLOAT)pBiquadState->coefs[0] * pBiquadState->pDelays[0]; 52d7d013446a64c6de9f0f2dfe098a721b140e0b48Ramesh Katuri 53d7d013446a64c6de9f0f2dfe098a721b140e0b48Ramesh Katuri // ynL+=A0 * x(n)L 54d7d013446a64c6de9f0f2dfe098a721b140e0b48Ramesh Katuri ynL += (LVM_FLOAT)pBiquadState->coefs[1] * (*pDataIn); 55d7d013446a64c6de9f0f2dfe098a721b140e0b48Ramesh Katuri 56d7d013446a64c6de9f0f2dfe098a721b140e0b48Ramesh Katuri // ynL+= (-B1 * y(n-1)L 57d7d013446a64c6de9f0f2dfe098a721b140e0b48Ramesh Katuri ynL += (LVM_FLOAT)pBiquadState->coefs[2] * pBiquadState->pDelays[1]; 58d7d013446a64c6de9f0f2dfe098a721b140e0b48Ramesh Katuri 59d7d013446a64c6de9f0f2dfe098a721b140e0b48Ramesh Katuri /************************************************************************** 60d7d013446a64c6de9f0f2dfe098a721b140e0b48Ramesh Katuri UPDATING THE DELAYS 61d7d013446a64c6de9f0f2dfe098a721b140e0b48Ramesh Katuri ***************************************************************************/ 62d7d013446a64c6de9f0f2dfe098a721b140e0b48Ramesh Katuri pBiquadState->pDelays[1] = ynL; // Update y(n-1)L 63d7d013446a64c6de9f0f2dfe098a721b140e0b48Ramesh Katuri pBiquadState->pDelays[0] = (*pDataIn++); // Update x(n-1)L 64d7d013446a64c6de9f0f2dfe098a721b140e0b48Ramesh Katuri 65d7d013446a64c6de9f0f2dfe098a721b140e0b48Ramesh Katuri /************************************************************************** 66d7d013446a64c6de9f0f2dfe098a721b140e0b48Ramesh Katuri WRITING THE OUTPUT 67d7d013446a64c6de9f0f2dfe098a721b140e0b48Ramesh Katuri ***************************************************************************/ 68d7d013446a64c6de9f0f2dfe098a721b140e0b48Ramesh Katuri *pDataOut++ = (LVM_FLOAT)ynL; // Write Left output 69d7d013446a64c6de9f0f2dfe098a721b140e0b48Ramesh Katuri 70d7d013446a64c6de9f0f2dfe098a721b140e0b48Ramesh Katuri } 71d7d013446a64c6de9f0f2dfe098a721b140e0b48Ramesh Katuri 72d7d013446a64c6de9f0f2dfe098a721b140e0b48Ramesh Katuri } 73d7d013446a64c6de9f0f2dfe098a721b140e0b48Ramesh Katuri#else 742c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurentvoid FO_1I_D16F16C15_TRC_WRA_01( Biquad_Instance_t *pInstance, 752c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent LVM_INT16 *pDataIn, 762c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent LVM_INT16 *pDataOut, 772c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent LVM_INT16 NrSamples) 782c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent { 792c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent LVM_INT32 ynL; 802c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent LVM_INT16 ii; 812c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent PFilter_State pBiquadState = (PFilter_State) pInstance; 822c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent 832c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent for (ii = NrSamples; ii != 0; ii--) 842c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent { 852c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent 862c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent /************************************************************************** 872c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent PROCESSING OF THE LEFT CHANNEL 882c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent ***************************************************************************/ 892c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent // ynL=A1 (Q15) * x(n-1)L (Q0) in Q15 902c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent ynL=(LVM_INT32)pBiquadState->coefs[0]* pBiquadState->pDelays[0]; 912c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent 922c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent // ynL+=A0 (Q15) * x(n)L (Q0) in Q15 932c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent ynL+=(LVM_INT32)pBiquadState->coefs[1]* (*pDataIn); 942c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent 952c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent // ynL+= (-B1 (Q15) * y(n-1)L (Q0) ) in Q15 962c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent ynL+=(LVM_INT32)pBiquadState->coefs[2]*pBiquadState->pDelays[1]; 972c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent 982c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent 992c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent ynL=(LVM_INT16)(ynL>>15); // ynL in Q0 format 1002c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent /************************************************************************** 1012c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent UPDATING THE DELAYS 1022c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent ***************************************************************************/ 1032c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent pBiquadState->pDelays[1]=ynL; // Update y(n-1)L in Q0 1042c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent pBiquadState->pDelays[0]=(*pDataIn++); // Update x(n-1)L in Q0 1052c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent 1062c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent /************************************************************************** 1072c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent WRITING THE OUTPUT 1082c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent ***************************************************************************/ 1092c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent *pDataOut++=(LVM_INT16)ynL; // Write Left output in Q0 1102c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent 1112c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent } 1122c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent 1132c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent } 114d7d013446a64c6de9f0f2dfe098a721b140e0b48Ramesh Katuri#endif 115