amf_delayallpassoffchip1s.c

ADI SHARC DSP 音频算法标准模块库

// Copyright(c) 2005 Analog Devices, Inc. All Rights Reserved. ADI Confidential.

#include "AMF_DelayAllpassOffChip1s.h"

void AMF_DelayAllpassOffChip1s_Render(AMF_DelayAllpassOffChip1s * restrict instance,AMF_Signal * restrict * buffers,int tickSize);

#if 0

#pragma optimize_for_speed
SEG_MOD_FAST_CODE  void AMF_DelayAllpassOffChip1s_Render(AMF_DelayAllpassOffChip1s * restrict instance,AMF_Signal * restrict * buffers,int tickSize) {
    int delay = instance->delay;		// delay in samples
    float *delayBuffer = &instance->delayBuffer[0];		// delay buffer
    int writeIndex = instance->delayWritePtr-delayBuffer;			// delay index
    int i;
    float tmp, tmpbuf;
    AMF_Signal *in = buffers[0]; 
    AMF_Signal *out = buffers[1]; 
	float pm *writePtr;
    float coef = instance->coef;

	writePtr = (float pm *)((int)delayBuffer);
	writePtr = (float pm *)__builtin_circptr(writePtr, writeIndex, (float pm *)((int)delayBuffer), delay);	

#pragma loop_count(8,128,8)
#pragma no_alias		
    for (i=0; i<tickSize; i++) {
        tmpbuf = *writePtr;
        tmp = tmpbuf + coef*in[i];
        tmpbuf = in[i] - coef*tmp; // make sure we read in[] before writing out[], to allow aliasing
        out[i] = tmp;
        *writePtr = tmpbuf;
		writePtr = (float pm *)__builtin_circptr(writePtr, 1, (float pm *)((int)delayBuffer), delay);
    }

    instance->delayWritePtr = (float *)writePtr;
}
#endif 

SEG_MOD_SLOW_CONST const AMF_ModuleClass AMFClassDelayAllpassOffChip1s = {
    
    /* Flags */
	0,

	/** Reference to render function. */
	(AMF_RenderFunction)AMF_DelayAllpassOffChip1s_Render,  // render function 

    /* Default bypass */
	(void *)0,

	/* Input descriptor - 1 input, and it is mono. */
	1, 0,

	/* Output descriptor - 1 output, and it is mono. */
    1, 0,
};