amf_testgenimpulsetrainip.c

ADI SHARC DSP 音频算法标准模块库

// 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/Source/AMF_TestGenImpulseTrainIP.c#3 $ 
// Part of : VisualAudio V2.5.0 
// Updated : $Date: 2006/10/12 $ by $Author: Fernando $



#include "AMF_TestGenImpulseTrainIP.h"
#include <math.h>

void AMF_TestGenImpulseTrainIP_Render(AMF_TestGenImpulseTrainIP * restrict instance,float * restrict * buffers,int tickSize);

SEG_MOD_FAST_CODE  void AMF_TestGenImpulseTrainIP_Render(AMF_TestGenImpulseTrainIP * restrict instance,float * restrict * buffers,int tickSize) {
    int i;
    float *out = buffers[0];
    int period, counter;

    period = instance->period;
    counter = instance->counter;
   
    if (period < 0) // single impulse
    {
#pragma vector_for
        for (i=0; i<tickSize; i++)
            out[i] = 0.0;

        if (counter == 0)
        {
            out[0] = 1.0;
            counter = -1;
        }
    } else for (i=0; i<tickSize; i++) {
        if (--counter <= 0)
        {
            counter = period;
            out[i] = 1.0;
        } else out[i]=0.0;
    }
    instance->counter = counter;
}

SEG_MOD_SLOW_CONST const AMF_ModuleClass AMFClassTestGenImpulseTrainIP = {
    
    /* Flags */
    0,
     
    /* Render function */
    (AMF_RenderFunction)AMF_TestGenImpulseTrainIP_Render,

    /* Default bypass */
    (void *)0,
    
    /* Input descriptor - no inputs. */
    0, 0,

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