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/*
* 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: nxp007753 $ */
/* $Revision: 1316 $ */
/* $Date: 2010-07-23 11:53:24 +0200 (Fri, 23 Jul 2010) $ */
/* */
/****************************************************************************************/
#ifndef __LVREV_PRIVATE_H__
#define __LVREV_PRIVATE_H__
#ifdef __cplusplus
extern "C" {
#endif
/****************************************************************************************/
/* */
/* Includes */
/* */
/****************************************************************************************/
#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 23170 /* 1/sqrt(2) * 2^15 */
#define LVREV_B_8_on_1000 17179869 /* 0.8 * 2^31 */
#define LVREV_HEADROOM 8192 /* -12dB * 2^15 */
#define LVREV_2_9_INQ29 1583769190L /* 2.9 in Q29 format */
#define LVREV_MIN3DB 0x5A82 /* -3dB in Q15 format */
/* Intenal constants */
#define LVREV_LP_Poly_Order 4
#define LVREV_LP_Poly_Shift 5
#define LVREV_T_3_Power_0_on_4 32768
#define LVREV_T_3_Power_1_on_4 43125
#define LVREV_T_3_Power_2_on_4 56755
#define LVREV_T_3_Power_3_on_4 74694
#define LVREV_T60_SCALE 306774 /*(32767/7000)<<16 */
#define LVREV_T_3_Power_minus0_on_4 32767 /* 3^(-0/4) * 2^15 */
#define LVREV_T_3_Power_minus1_on_4 24898 /* 3^(-1/4) * 2^15 */
#define LVREV_T_3_Power_minus2_on_4 18919 /* 3^(-2/4) * 2^15 */
#define LVREV_T_3_Power_minus3_on_4 14375 /* 3^(-3/4) * 2^15 */
#define LVREV_MAX_T3_DELAY 2527 /* ((48000 * 120 * LVREV_T_3_Power_minus3_on_4) >> 15) / 1000 */
#define LVREV_MAX_T2_DELAY 3326 /* ((48000 * 120 * LVREV_T_3_Power_minus2_on_4) >> 15) / 1000 */
#define LVREV_MAX_T1_DELAY 4377 /* ((48000 * 120 * LVREV_T_3_Power_minus1_on_4) >> 15) / 1000 */
#define LVREV_MAX_T0_DELAY 5760 /* ((48000 * 120 * LVREV_T_3_Power_minus0_on_4) >> 15) / 1000 */
#define LVREV_MAX_AP3_DELAY 1685 /* ((48000 * 120 * LVREV_T_3_Power_minus3_on_4) >> 15) / 1500 */
#define LVREV_MAX_AP2_DELAY 2218 /* ((48000 * 120 * LVREV_T_3_Power_minus2_on_4) >> 15) / 1500 */
#define LVREV_MAX_AP1_DELAY 2918 /* ((48000 * 120 * LVREV_T_3_Power_minus1_on_4) >> 15) / 1500 */
#define LVREV_MAX_AP0_DELAY 3840 /* ((48000 * 120 * LVREV_T_3_Power_minus0_on_4) >> 15) / 1500 */
#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 9 /* 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 */
/* */
/****************************************************************************************/
/* Fast data structure */
typedef struct
{
Biquad_1I_Order1_Taps_t HPTaps; /* High pass filter taps */
Biquad_1I_Order1_Taps_t LPTaps; /* Low pass filter taps */
Biquad_1I_Order1_Taps_t RevLPTaps[4]; /* Reverb low pass filters taps */
} LVREV_FastData_st;
/* Fast coefficient structure */
typedef struct
{
Biquad_Instance_t HPCoefs; /* High pass filter coefficients */
Biquad_Instance_t LPCoefs; /* Low pass filter coefficients */
Biquad_Instance_t RevLPCoefs[4]; /* Reverb low pass filters coefficients */
} LVREV_FastCoef_st;
/* Instance parameter structure */
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 */
LVREV_FastData_st *pFastData; /* Fast data memory base address */
LVREV_FastCoef_st *pFastCoef; /* Fast coefficient memory base address */
LVM_INT32 *pScratchDelayLine[4]; /* Delay line scratch memory */
LVM_INT32 *pScratch; /* Multi ussge scratch */
LVM_INT32 *pInputSave; /* Reverb block input save for dry/wet mixing*/
/* Feedback matrix */
Mix_1St_Cll_t FeedbackMixer[4]; /* Mixer for Pop and Click Supression caused by feedback Gain */
/* All-Pass Filter */
LVM_INT32 T[4]; /* Maximum delay size of buffer */
LVM_INT32 *pDelay_T[4]; /* Pointer to delay buffers */
LVM_INT32 Delay_AP[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[4]; /* A delay length in samples */
LVM_INT32 B_DelaySize[4]; /* B delay length in samples */
LVM_INT32 *pOffsetA[4]; /* Offset for the A delay tap */
LVM_INT32 *pOffsetB[4]; /* Offset for the B delay tap */
Mix_2St_Cll_t Mixer_APTaps[4]; /* Smoothed AP delay mixer */
Mix_1St_Cll_t Mixer_SGFeedback[4]; /* Smoothed SAfeedback gain */
Mix_1St_Cll_t Mixer_SGFeedforward[4]; /* Smoothed AP feedforward gain */
/* Output gain */
Mix_2St_Cll_t BypassMixer; /* Dry/wet mixer */
LVM_INT16 Gain; /* Gain applied to output to maintain average signal power */
Mix_1St_Cll_t GainMixer; /* Gain smoothing */
} LVREV_Instance_st;
/****************************************************************************************/
/* */
/* Function prototypes */
/* */
/****************************************************************************************/
LVREV_ReturnStatus_en LVREV_ApplyNewSettings(LVREV_Instance_st *pPrivate);
void ReverbBlock(LVM_INT32 *pInput,
LVM_INT32 *pOutput,
LVREV_Instance_st *pPrivate,
LVM_UINT16 NumSamples);
LVM_INT32 BypassMixer_Callback(void *pCallbackData,
void *pGeneralPurpose,
LVM_INT16 GeneralPurpose );
#ifdef __cplusplus
}
#endif
#endif /** __LVREV_PRIVATE_H__ **/
/* End of file */
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