| /* |
| * 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. |
| */ |
| |
| #ifndef __LVREV_PRIVATE_H__ |
| #define __LVREV_PRIVATE_H__ |
| |
| /****************************************************************************************/ |
| /* */ |
| /* Includes */ |
| /* */ |
| /****************************************************************************************/ |
| |
| #include <audio_utils/BiquadFilter.h> |
| #include "LVREV.h" |
| #include "LVREV_Tables.h" |
| #include "BIQUAD.h" |
| #include "Filter.h" |
| #include "VectorArithmetic.h" |
| #include "Mixer.h" |
| #include "LVM_Macros.h" |
| |
| /****************************************************************************************/ |
| /* */ |
| /* Defines */ |
| /* */ |
| /****************************************************************************************/ |
| /* General */ |
| #define ONE_OVER_SQRT_TWO 0.707107f /* 1/sqrt(2) * 2^15 */ |
| #define LVREV_B_8_on_1000 0.008f /* 0.8 * 2^31 */ |
| #define LVREV_HEADROOM 0.25f /* -12dB * 2^15 */ |
| #define LVREV_2_9_INQ29 2.9f /* 2.9 in Q29 format */ |
| #define LVREV_MIN3DB 0.7079457f /* -3dB in Q15 format */ |
| |
| /* Intenal constants */ |
| #define LVREV_LP_Poly_Order 4 |
| #define LVREV_LP_Poly_Shift 5 |
| |
| #define LVREV_T60_SCALE 0.000142f /*(1/7000) */ |
| |
| #define LVREV_T_3_Power_0_on_4 1.0f |
| #define LVREV_T_3_Power_1_on_4 1.316074f |
| #define LVREV_T_3_Power_2_on_4 1.732051f |
| #define LVREV_T_3_Power_3_on_4 2.279507f |
| #define LVREV_T_3_Power_minus0_on_4 1.0f /* 3^(-0/4) * 2^15 */ |
| #define LVREV_T_3_Power_minus1_on_4 0.759836f /* 3^(-1/4) * 2^15 */ |
| #define LVREV_T_3_Power_minus2_on_4 0.577350f /* 3^(-2/4) * 2^15 */ |
| #define LVREV_T_3_Power_minus3_on_4 0.438691f /* 3^(-3/4) * 2^15 */ |
| |
| /* ((192000 * 120 * LVREV_T_3_Power_minus3_on_4) >> 15) / 1000 */ |
| #define LVREV_MAX_T3_DELAY 10108 |
| /* ((192000 * 120 * LVREV_T_3_Power_minus2_on_4) >> 15) / 1000 */ |
| #define LVREV_MAX_T2_DELAY 13304 |
| /* ((192000 * 120 * LVREV_T_3_Power_minus1_on_4) >> 15) / 1000 */ |
| #define LVREV_MAX_T1_DELAY 17508 |
| /* ((192000 * 120 * LVREV_T_3_Power_minus0_on_4) >> 15) / 1000 */ |
| #define LVREV_MAX_T0_DELAY 23040 |
| /* ((192000 * 120 * LVREV_T_3_Power_minus3_on_4) >> 15) / 1500 */ |
| #define LVREV_MAX_AP3_DELAY 6740 |
| /* ((192000 * 120 * LVREV_T_3_Power_minus2_on_4) >> 15) / 1500 */ |
| #define LVREV_MAX_AP2_DELAY 8872 |
| /* ((192000 * 120 * LVREV_T_3_Power_minus1_on_4) >> 15) / 1500 */ |
| #define LVREV_MAX_AP1_DELAY 11672 |
| /* ((192000 * 120 * LVREV_T_3_Power_minus0_on_4) >> 15) / 1500 */ |
| #define LVREV_MAX_AP0_DELAY 15360 |
| |
| #define LVREV_BYPASSMIXER_TC 1000 /* Bypass mixer time constant*/ |
| #define LVREV_ALLPASS_TC 1000 /* All-pass filter time constant */ |
| #define LVREV_ALLPASS_TAP_TC 10000 /* All-pass filter dely tap change */ |
| #define LVREV_FEEDBACKMIXER_TC 100 /* Feedback mixer time constant*/ |
| #define LVREV_OUTPUTGAIN_SHIFT 5 /* Bits shift for output gain correction */ |
| |
| /* Parameter limits */ |
| #define LVREV_NUM_FS 13 /* Number of supported sample rates */ |
| |
| #define LVREV_MAXBLKSIZE_LIMIT 64 /* Maximum block size low limit */ |
| #define LVREV_MAX_LEVEL 100 /* Maximum level, 100% */ |
| #define LVREV_MIN_LPF_CORNER 50 /* Low pass filter limits */ |
| #define LVREV_MAX_LPF_CORNER 23999 |
| #define LVREV_MIN_HPF_CORNER 20 /* High pass filrer limits */ |
| #define LVREV_MAX_HPF_CORNER 1000 |
| #define LVREV_MAX_T60 7000 /* Maximum T60 time in ms */ |
| #define LVREV_MAX_DENSITY 100 /* Maximum density, 100% */ |
| #define LVREV_MAX_DAMPING 100 /* Maximum damping, 100% */ |
| #define LVREV_MAX_ROOMSIZE 100 /* Maximum room size, 100% */ |
| |
| /****************************************************************************************/ |
| /* */ |
| /* Structures */ |
| /* */ |
| /****************************************************************************************/ |
| |
| |
| typedef struct { |
| /* General */ |
| LVREV_InstanceParams_st InstanceParams; /* Initialisation time instance parameters */ |
| LVREV_MemoryTable_st MemoryTable; /* Memory table */ |
| LVREV_ControlParams_st CurrentParams; /* Parameters being used */ |
| LVREV_ControlParams_st NewParams; /* New parameters from the \ |
| calling application */ |
| LVM_CHAR bControlPending; /* Flag to indicate new parameters \ |
| are available */ |
| LVM_CHAR bFirstControl; /* Flag to indicate that the control \ |
| function is called for the first time */ |
| LVM_CHAR bDisableReverb; /* Flag to indicate that the mix level is |
| 0% and the reverb can be disabled */ |
| LVM_INT32 RoomSizeInms; /* Room size in msec */ |
| LVM_INT32 MaxBlkLen; /* Maximum block size for internal |
| processing */ |
| |
| /* Aligned memory pointers */ |
| std::unique_ptr<android::audio_utils::BiquadFilter<LVM_FLOAT>> |
| pRevHPFBiquad; /* Biquad filter instance for HPF */ |
| std::unique_ptr<android::audio_utils::BiquadFilter<LVM_FLOAT>> |
| pRevLPFBiquad; /* Biquad filter instance for LPF */ |
| std::array<std::unique_ptr<android::audio_utils::BiquadFilter<LVM_FLOAT>>, LVREV_DELAYLINES_4> |
| revLPFBiquad; /* Biquad filter instance for Reverb LPF */ |
| LVM_FLOAT* pScratchDelayLine[LVREV_DELAYLINES_4]; /* Delay line scratch memory */ |
| LVM_FLOAT* pScratch; /* Multi ussge scratch */ |
| LVM_FLOAT* pInputSave; /* Reverb block input save for dry/wet |
| mixing*/ |
| |
| /* Feedback matrix */ |
| Mix_1St_Cll_FLOAT_t FeedbackMixer[LVREV_DELAYLINES_4]; /* Mixer for Pop and Click Suppression \ |
| caused by feedback Gain */ |
| |
| /* All-Pass Filter */ |
| LVM_INT32 T[LVREV_DELAYLINES_4]; /* Maximum delay size of buffer */ |
| LVM_FLOAT* pDelay_T[LVREV_DELAYLINES_4]; /* Pointer to delay buffers */ |
| LVM_INT32 Delay_AP[LVREV_DELAYLINES_4]; /* Offset to AP delay buffer start */ |
| LVM_INT16 AB_Selection; /* Smooth from tap A to B when 1 \ |
| otherwise B to A */ |
| LVM_INT32 A_DelaySize[LVREV_DELAYLINES_4]; /* A delay length in samples */ |
| LVM_INT32 B_DelaySize[LVREV_DELAYLINES_4]; /* B delay length in samples */ |
| LVM_FLOAT* pOffsetA[LVREV_DELAYLINES_4]; /* Offset for the A delay tap */ |
| LVM_FLOAT* pOffsetB[LVREV_DELAYLINES_4]; /* Offset for the B delay tap */ |
| Mix_2St_Cll_FLOAT_t Mixer_APTaps[LVREV_DELAYLINES_4]; /* Smoothed AP delay mixer */ |
| Mix_1St_Cll_FLOAT_t Mixer_SGFeedback[LVREV_DELAYLINES_4]; /* Smoothed SAfeedback gain */ |
| Mix_1St_Cll_FLOAT_t Mixer_SGFeedforward[LVREV_DELAYLINES_4]; /* Smoothed AP feedforward gain */ |
| |
| /* Output gain */ |
| Mix_2St_Cll_FLOAT_t BypassMixer; /* Dry/wet mixer */ |
| LVM_FLOAT Gain; /* Gain applied to output to maintain |
| average signal power */ |
| Mix_1St_Cll_FLOAT_t GainMixer; /* Gain smoothing */ |
| |
| } LVREV_Instance_st; |
| |
| /****************************************************************************************/ |
| /* */ |
| /* Function prototypes */ |
| /* */ |
| /****************************************************************************************/ |
| |
| LVREV_ReturnStatus_en LVREV_ApplyNewSettings(LVREV_Instance_st* pPrivate); |
| void ReverbBlock(LVM_FLOAT* pInput, LVM_FLOAT* pOutput, LVREV_Instance_st* pPrivate, |
| LVM_UINT16 NumSamples); |
| LVM_INT32 BypassMixer_Callback(void* pCallbackData, void* pGeneralPurpose, |
| LVM_INT16 GeneralPurpose); |
| |
| #endif /** __LVREV_PRIVATE_H__ **/ |
| |
| /* End of file */ |
