amf_mixer2x1smoothed.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_Mixer2x1Smoothed.c#3 $ 
// Part of : VisualAudio V2.5.0 
// Updated : $Date: 2006/10/12 $ by $Author: Fernando $



#include "AMF_Mixer2x1Smoothed.h"

void AMF_Mixer2x1Smoothed_Render(AMF_Mixer2x1Smoothed * restrict instance,float * restrict * buffers,int tickSize);

// NOTE: The C version of this function is for reference only (it is
//       intended just to show the general algorithm that the module
//       uses), and it may not have been fully tested
#if 0

SEG_MOD_FAST_CODE  void AMF_Mixer2x1Smoothed_Render(AMF_Mixer2x1Smoothed * restrict instance,float * restrict * buffers,int tickSize) {
    int i;
    float *in1 = buffers[0];
    float *in2 = buffers[1];
    float *out = buffers[2];
    float amp0Target = instance->amp0Target;
    float amp1Target = instance->amp1Target;
    float amp0 = instance->amp0;
    float amp1 = instance->amp1;
    float ampsSmoothing = instance->ampsSmoothing;
    float oneMinusRate = 1.0 - ampsSmoothing;
    float amp,targetAmp;
    
    for (i=0; i<tickSize; i++) {
        // Use SIMD here, if possible
        amp0 = amp0 * oneMinusRate + amp0Target * ampsSmoothing;
        amp1 = amp1 * oneMinusRate + amp1Target * ampsSmoothing;
        out[i] = in1[i] * amp0 + in2[i] * amp1;
    }
    instance->amp0 = amp0;
    instance->amp1 = amp1;
}
#endif

SEG_MOD_SLOW_CONST const AMF_ModuleClass AMFClassMixer2x1Smoothed = {
    
    /* Flags */
    0,
     
    /* Render function */
    (AMF_RenderFunction)AMF_Mixer2x1Smoothed_Render,

    /* Default bypass */
    (void *)0,
    
    /* Input descriptor - 2 inputs, and they are mono. */
    2, 0,

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