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//
// Copyright © 2025 Agora
// This file is part of TEN Framework, an open source project.
// Licensed under the Apache License, Version 2.0, with certain conditions.
// Refer to the "LICENSE" file in the root directory for more information.
//
#ifndef __FSCVRT_ST_H__
#define __FSCVRT_ST_H__
#include <stdio.h>
#include "fscvrt.h"
#define _FSCVRT_MAXNSEC (40)
#define _FSCVRT_COMMON_FS (96000)
#define _FSCVRT_ALIGN8(o) (((o) + 7) & (~7))
#define _FSCVRT_FLOAT2SHORT(x) \
((x) < -32767.5f ? -32768 : ((x) > 32766.5f ? 32767 : (short)floor(.5 + (x))))
#define _FSCVRT_MIN(x, y) ((x > y) ? (y) : (x))
#define _FSCVRT_MAX(x, y) ((x > y) ? (x) : (y))
#define _FSCVRT_1over2_LOWPASS_NSEC (5)
static const float _FSCVRT_1over2_LOWPASS_B[_FSCVRT_1over2_LOWPASS_NSEC][3] = {
{1.000000e+00f, 1.830863e+00f, 1.000000e+00f},
{1.000000e+00f, 1.039654e+00f, 1.000000e+00f},
{1.000000e+00f, 4.900788e-01f, 1.000000e+00f},
{1.000000e+00f, 2.419292e-01f, 1.000000e+00f},
{1.000000e+00f, 1.517919e-01f, 1.000000e+00f}};
static const float _FSCVRT_1over2_LOWPASS_A[_FSCVRT_1over2_LOWPASS_NSEC][3] = {
{1.000000e+00f, -8.445478e-01f, 2.453003e-01f},
{1.000000e+00f, -5.469711e-01f, 5.010509e-01f},
{1.000000e+00f, -2.646897e-01f, 7.464574e-01f},
{1.000000e+00f, -1.074159e-01f, 8.912371e-01f},
{1.000000e+00f, -4.448528e-02f, 9.702184e-01f}};
static const float _FSCVRT_1over2_LOWPASS_G[_FSCVRT_1over2_LOWPASS_NSEC] = {
// 4.184914e-01f,4.184914e-01f,4.184914e-01f,4.184914e-01f,4.184914e-01f
4.233410e-01f, 4.233410e-01f, 4.233410e-01f, 4.233410e-01f, 4.233410e-01f};
#define _FSCVRT_1over3_LOWPASS_NSEC (5)
static const float _FSCVRT_1over3_LOWPASS_B[_FSCVRT_1over3_LOWPASS_NSEC][3] = {
{1.000000e+00f, 1.535971e+00f, 1.000000e+00f},
{1.000000e+00f, 6.284728e-02f, 1.000000e+00f},
{1.000000e+00f, -5.726159e-01f, 1.000000e+00f},
{1.000000e+00f, -7.990919e-01f, 1.000000e+00f},
{1.000000e+00f, -8.741772e-01f, 1.000000e+00f}};
static const float _FSCVRT_1over3_LOWPASS_A[_FSCVRT_1over3_LOWPASS_NSEC][3] = {
{1.000000e+00f, -1.261229e+00f, 4.351921e-01f},
{1.000000e+00f, -1.171732e+00f, 6.072938e-01f},
{1.000000e+00f, -1.078980e+00f, 7.901941e-01f},
{1.000000e+00f, -1.026436e+00f, 9.073955e-01f},
{1.000000e+00f, -1.013524e+00f, 9.743813e-01f}};
static const float _FSCVRT_1over3_LOWPASS_G[_FSCVRT_1over3_LOWPASS_NSEC] = {
// 3.126979e-01f,3.126979e-01f,3.126979e-01f,3.126979e-01f,3.126979e-01f
3.1704682e-01f, 3.1704682e-01f, 3.1704682e-01f, 3.1704682e-01f,
3.1704682e-01f};
#define _FSCVRT_1over4_LOWPASS_NSEC (5)
static const float _FSCVRT_1over4_LOWPASS_B[_FSCVRT_1over4_LOWPASS_NSEC][3] = {
{1.000000e+00f, 1.193034e+00f, 1.000000e+00f},
{1.000000e+00f, -5.757392e-01f, 1.000000e+00f},
{1.000000e+00f, -1.105338e+00f, 1.000000e+00f},
{1.000000e+00f, -1.271233e+00f, 1.000000e+00f},
{1.000000e+00f, -1.323929e+00f, 1.000000e+00f}};
static const float _FSCVRT_1over4_LOWPASS_A[_FSCVRT_1over4_LOWPASS_NSEC][3] = {
{1.000000e+00f, -1.447526e+00f, 5.478735e-01f},
{1.000000e+00f, -1.429707e+00f, 6.830356e-01f},
{1.000000e+00f, -1.412017e+00f, 8.292100e-01f},
{1.000000e+00f, -1.405145e+00f, 9.242718e-01f},
{1.000000e+00f, -1.412679e+00f, 9.790443e-01f}};
static const float _FSCVRT_1over4_LOWPASS_G[_FSCVRT_1over4_LOWPASS_NSEC] = {
// 2.700060e-01f,2.700060e-01f,2.700060e-01f,2.700060e-01f,2.700060e-01f
2.7502688e-01f, 2.7502688e-01f, 2.7502688e-01f, 2.7502688e-01f,
2.7502688e-01f};
#define _FSCVRT_1over6_LOWPASS_NSEC (5)
static const float _FSCVRT_1over6_LOWPASS_B[_FSCVRT_1over6_LOWPASS_NSEC][3] = {
{1.000000e+00f, 4.149228e-01f, 1.000000e+00f},
{1.000000e+00f, -1.285358e+00f, 1.000000e+00f},
{1.000000e+00f, -1.583012e+00f, 1.000000e+00f},
{1.000000e+00f, -1.663823e+00f, 1.000000e+00f},
{1.000000e+00f, -1.688104e+00f, 1.000000e+00f}};
static const float _FSCVRT_1over6_LOWPASS_A[_FSCVRT_1over6_LOWPASS_NSEC][3] = {
{1.000000e+00f, -1.688731e+00f, 7.264798e-01f},
{1.000000e+00f, -1.696982e+00f, 8.146896e-01f},
{1.000000e+00f, -1.706117e+00f, 9.049889e-01f},
{1.000000e+00f, -1.713737e+00f, 9.598250e-01f},
{1.000000e+00f, -1.723161e+00f, 9.892408e-01f}};
static const float _FSCVRT_1over6_LOWPASS_G[_FSCVRT_1over6_LOWPASS_NSEC] = {
// 2.333130e-01f,2.333130e-01f,2.333130e-01f,2.333130e-01f,2.333130e-01f
2.3765156e-01f, 2.3765156e-01f, 2.3765156e-01f, 2.3765156e-01f,
2.3765156e-01f};
typedef struct FscvrtSt_ {
void* dynamMemPtr; // memory pointer holding the dynamic memory
size_t dynamMemSize; // size of the buffer *dynamMemPtr
// Static Configuration
FscvrtStaticCfg stCfg;
// Internal Static Config Registers, which are generated from stCfg
int mode;
// 0: direct bypass, 1: direct upsampling, 2: direct downsampling
// 3: upsampling->downsampling
int upSmplRate;
int downSmplRate;
int biquadInBufLen; // biquad input buffer length
int biquadOutBufLen; // biquad output buffer length
int nSec;
const float* biquadB[_FSCVRT_MAXNSEC];
const float* biquadA[_FSCVRT_MAXNSEC];
const float* biquadG; // gain for each section
// ---------------------------------------------------------------
// Variables
void* biquadSt; // biqua filter state handler
int biquadInBufCnt;
float* biquadInBuf; // [biquadInBufLen]
int biquadOutBufCnt;
float* biquadOutBuf; // [biquadOutBufLen]
} FscvrtSt;
#endif // __FSCVRT_ST_H__
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