diff options
Diffstat (limited to 'media/libeffects/lvm/lib/Common/src/DC_2I_D16_TRC_WRA_01.c')
-rwxr-xr-x | media/libeffects/lvm/lib/Common/src/DC_2I_D16_TRC_WRA_01.c | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/media/libeffects/lvm/lib/Common/src/DC_2I_D16_TRC_WRA_01.c b/media/libeffects/lvm/lib/Common/src/DC_2I_D16_TRC_WRA_01.c new file mode 100755 index 0000000..187fe68 --- /dev/null +++ b/media/libeffects/lvm/lib/Common/src/DC_2I_D16_TRC_WRA_01.c @@ -0,0 +1,76 @@ +/* + * 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. + */ + +/************************************************************************/ +/* */ +/* Project:: */ +/* $Author: beq07716 $*/ +/* $Revision: 1000 $*/ +/* $Date: 2010-06-28 13:08:20 +0200 (Mon, 28 Jun 2010) $*/ +/* */ +/************************************************************************/ + +#include "BIQUAD.h" +#include "DC_2I_D16_TRC_WRA_01_Private.h" +#include "LVM_Macros.h" + +void DC_2I_D16_TRC_WRA_01( Biquad_Instance_t *pInstance, + LVM_INT16 *pDataIn, + LVM_INT16 *pDataOut, + LVM_INT16 NrSamples) + { + LVM_INT32 LeftDC,RightDC; + LVM_INT32 Diff; + LVM_INT32 j; + PFilter_State pBiquadState = (PFilter_State) pInstance; + + LeftDC = pBiquadState->LeftDC; + RightDC = pBiquadState->RightDC; + for(j=NrSamples-1;j>=0;j--) + { + /* Subtract DC an saturate */ + Diff=*(pDataIn++)-(LeftDC>>16); + if (Diff > 32767) { + Diff = 32767; } + else if (Diff < -32768) { + Diff = -32768; } + *(pDataOut++)=(LVM_INT16)Diff; + if (Diff < 0) { + LeftDC -= DC_D16_STEP; } + else { + LeftDC += DC_D16_STEP; } + + + /* Subtract DC an saturate */ + Diff=*(pDataIn++)-(RightDC>>16); + if (Diff > 32767) { + Diff = 32767; } + else if (Diff < -32768) { + Diff = -32768; } + *(pDataOut++)=(LVM_INT16)Diff; + if (Diff < 0) { + RightDC -= DC_D16_STEP; } + else { + RightDC += DC_D16_STEP; } + + } + pBiquadState->LeftDC = LeftDC; + pBiquadState->RightDC = RightDC; + + + } + |