amf_biquad_ds.h

ADI SHARC DSP 音频算法标准模块库

#ifndef _AMF_BIQUAD_DS_
#define _AMF_BIQUAD_DS_

// 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_Biquad_DS.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:
    /*
    coef layout:
        filter1 d1        (1st-delayed denominator coef, negated)
        filter2 d1        (1st-delayed denominator coef, negated)
        filter1 d2        (2nd-delayed denominator coef, negated)
        filter2 d2        (2nd-delayed denominator coef, negated)
        filter1 n0        (non-delayed numerator coef)
        filter2 n0        (non-delayed numerator coef)
        filter1 n1        (1st-delayed numerator coef)
        filter2 n1        (1st-delayed numerator coef)
        filter1 n2        (2nd-delayed numerator coef)
        filter2 n2        (2nd-delayed numerator coef)    
    */
    float pm *coefs;
    
    // State:
    float *state;
} AMF_Biquad_DS;

extern const AMF_ModuleClass AMFClassBiquad_DS;


#else

// ASM declarations for offsets from start of instance (must be kept in synch with C version)
#define AMF_Biquad_DS_Coefs     AMF_Module_SIZE  // defined in AudioProcessing.h
#define AMF_Biquad_DS_State     (AMF_Module_SIZE+1)

#endif

#endif