amf_biquadcascade_d.h

ADI SHARC DSP 音频算法标准模块库

#ifndef _AMF_BIQUADCASCADE_D_
#define _AMF_BIQUADCASCADE_D_

// Copyright(c) 2005 Analog Devices, Inc. All Rights Reserved.
// This software is proprietary and confidential to Analog Devices, Inc. and its licensors.

// File    : $Id: //depot/development/visualaudio/modules/2.5.0/SHARC/Include/AMF_BiquadCascade_D.h#3 $ 
// Part of : VisualAudio V2.5.0 
// Updated : $Date: 2006/10/12 $ by $Author: Fernando $




#include "AudioProcessing.h"

#ifdef __ECC__

// C declarations

typedef struct {
    AMF_Module b;
    
    // Parameters:
    int numSections; 
    float totalAmp1; // totalAmp = product of all stage n0 coefs.
    float totalAmp2; // Numerator coefs in the following array must be
                     // scaled accordingly.
    float pm *coefs;
    /*
    coef layout:
    etc...
    filter1a d2    (2nd-delayed denominator coef, negated)
    filter1b d2    (2nd-delayed denominator coef, negated)
     filter1a d1    (1st-delayed denominator coef, negated)
     filter1b d1    (1st-delayed denominator coef, negated)
     filter1a n2    (2nd-delayed numerator coef)
     filter1b n2    (2nd-delayed numerator coef)
     filter1a n1    (1st-delayed numerator coef)
     filter1b n1    (1st-delayed numerator coef)
    filter2a d2    (2nd-delayed denominator coef, negated)
    filter2b d2    (2nd-delayed denominator coef, negated)
     filter2a d1    (1st-delayed denominator coef, negated)
     filter2b d1    (1st-delayed denominator coef, negated)
     filter2a n2    (2nd-delayed numerator coef)
     filter2b n2    (2nd-delayed numerator coef)
     filter2a n1    (1st-delayed numerator coef)
     filter2b n1    (1st-delayed numerator coef)
    filter3a d2    (2nd-delayed denominator coef, negated)
    filter3b d2    (2nd-delayed denominator coef, negated)
    etc...
    */
    
    // State:
    float pm *state;
} AMF_BiquadCascade_D;

extern const AMF_ModuleClass AMFClassBiquadCascade_D;

#else

// ASM declarations for offsets from start of instance (must be kept in synch with C version)
#define AMF_BiquadCascade_D_NumSections    AMF_Module_SIZE  // defined in AudioProcessing.h
#define AMF_BiquadCascade_D_TotalAmp1    (AMF_Module_SIZE+1)  // defined in AudioProcessing.h
#define AMF_BiquadCascade_D_TotalAmp2    (AMF_Module_SIZE+2)  // defined in AudioProcessing.h
#define AMF_BiquadCascade_D_Coefs     (AMF_Module_SIZE+3)  // defined in AudioProcessing.h
#define AMF_BiquadCascade_D_State     (AMF_Module_SIZE+4)

#endif

#endif