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 "DC_2I_D16_TRC_WRA_01_Private.h" 202c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent#include "LVM_Macros.h" 212c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent 222c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurentvoid DC_2I_D16_TRC_WRA_01( Biquad_Instance_t *pInstance, 232c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent LVM_INT16 *pDataIn, 242c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent LVM_INT16 *pDataOut, 252c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent LVM_INT16 NrSamples) 262c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent { 272c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent LVM_INT32 LeftDC,RightDC; 282c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent LVM_INT32 Diff; 292c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent LVM_INT32 j; 302c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent PFilter_State pBiquadState = (PFilter_State) pInstance; 312c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent 322c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent LeftDC = pBiquadState->LeftDC; 332c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent RightDC = pBiquadState->RightDC; 342c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent for(j=NrSamples-1;j>=0;j--) 352c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent { 362c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent /* Subtract DC an saturate */ 372c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent Diff=*(pDataIn++)-(LeftDC>>16); 382c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent if (Diff > 32767) { 392c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent Diff = 32767; } 402c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent else if (Diff < -32768) { 412c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent Diff = -32768; } 422c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent *(pDataOut++)=(LVM_INT16)Diff; 432c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent if (Diff < 0) { 442c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent LeftDC -= DC_D16_STEP; } 452c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent else { 462c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent LeftDC += DC_D16_STEP; } 472c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent 482c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent 492c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent /* Subtract DC an saturate */ 502c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent Diff=*(pDataIn++)-(RightDC>>16); 512c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent if (Diff > 32767) { 522c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent Diff = 32767; } 532c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent else if (Diff < -32768) { 542c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent Diff = -32768; } 552c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent *(pDataOut++)=(LVM_INT16)Diff; 562c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent if (Diff < 0) { 572c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent RightDC -= DC_D16_STEP; } 582c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent else { 592c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent RightDC += DC_D16_STEP; } 602c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent 612c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent } 622c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent pBiquadState->LeftDC = LeftDC; 632c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent pBiquadState->RightDC = RightDC; 642c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent 652c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent 662c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent } 672c8e5cab3faa6d360e222b7a6c40a80083d021acEric Laurent 68