1 /* 2 * Copyright (C) 2004-2010 NXP Software 3 * Copyright (C) 2010 The Android Open Source Project 4 * 5 * Licensed under the Apache License, Version 2.0 (the "License"); 6 * you may not use this file except in compliance with the License. 7 * You may obtain a copy of the License at 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 */ 17 18 #ifndef _COMP_LIM_H 19 #define _COMP_LIM_H 20 21 #ifdef __cplusplus 22 extern "C" { 23 #endif /* __cplusplus */ 24 25 26 /************************************************************************************/ 27 /* */ 28 /* Includes */ 29 /* */ 30 /************************************************************************************/ 31 32 #include "LVM_Types.h" 33 34 35 /************************************************************************************/ 36 /* */ 37 /* Structures */ 38 /* */ 39 /************************************************************************************/ 40 41 typedef struct /* Compressor state */ 42 { 43 /* Normaliser */ 44 LVM_INT16 Norm_Attack; /* Attack time constant of the Normaliser integrator */ 45 LVM_INT16 Norm_Decay; /* Decay time constant of the Normaliser integrator */ 46 LVM_INT32 NormInt; /* Normaliser integrator current value */ 47 LVM_INT16 Shift; /* Shift gain */ 48 LVM_INT16 Threshold; /* Target threshold */ 49 50 /* Compressor */ 51 LVM_INT16 Comp_Atten; /* Attenuation applied before soft knee compressor */ 52 LVM_INT16 Comp_Attack_S; /* Attack time constant of the slow integrator */ 53 LVM_INT16 Comp_Decay_S; /* Decay time constant of slow the integrator */ 54 LVM_INT16 Comp_Attack_F; /* Attack time constant of fast the integrator */ 55 LVM_INT16 Comp_Decay_F; /* Decay time constant of fast the integrator */ 56 LVM_INT16 SoftClipGain; /* Soft clip gain control */ 57 LVM_INT32 CompIntSlow; /* Compressor slow integrator current value */ 58 LVM_INT32 CompIntFast; /* Compressor fast integrator current value */ 59 60 61 } CompLim_Instance_t; 62 63 64 /************************************************************************************/ 65 /* */ 66 /* Function Prototypes */ 67 /* */ 68 /************************************************************************************/ 69 #ifdef BUILD_FLOAT 70 void NonLinComp_Float(LVM_FLOAT Gain, 71 LVM_FLOAT *pDataIn, 72 LVM_FLOAT *pDataOut, 73 LVM_INT32 BlockLength); 74 #else 75 void NonLinComp_D16(LVM_INT16 Gain, 76 LVM_INT16 *pSterBfIn, 77 LVM_INT16 *pSterBfOut, 78 LVM_INT32 BlockLength); 79 #endif 80 #ifdef __cplusplus 81 } 82 #endif /* __cplusplus */ 83 84 #endif /* #ifndef _COMP_LIM_H */ 85 86 87 88
