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



#include "AMF_ClipAsym_DS.h"

void AMF_ClipAsym_DS_Render(AMF_ClipAsym_DS * 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_ClipAsym_DS_Render(AMF_ClipAsym_DS * restrict instance,float * restrict * buffers,int tickSize) {
    int i;
    float *in  = buffers[0];
    float *out = buffers[1];
    float clipUpperLeft = instance->clipUpper[0];
    float clipUpperRight = instance->clipUpper[1];
    float clipLowerLeft = instance->clipLower[0];
    float clipLowerRight = instance->clipLower[1];
        
    for (i=0; i<tickSize*2; i+=2) {
        // clip left channel
        if(in[i]>clipUpperLeft)
            out[i] = clipUpperLeft;
        else if(in[i]<clipLowerLeft)
            out[i] = clipLowerLeft;
        else 
            out[i] = in[i];
            
        // clip right channel
        if(in[i+1]>clipUpperRight)
            out[i+1] = clipUpperRight;
        else if(in[i+1]<clipLowerRight)
            out[i+1] = clipLowerRight;
        else 
            out[i+1] = in[i+1];
    }
    
}
#endif

SEG_MOD_SLOW_CONST const AMF_ModuleClass AMFClassClipAsym_DS = {
    
    /* Flags */
    0,
     
    /* Render function */
    (AMF_RenderFunction)AMF_ClipAsym_DS_Render,

    /* Default bypass */
    (void *)0,
    
    /* Input descriptor - 2 inputs, and they are stereo. */
    2, AMF_StereoPin(0)|AMF_StereoPin(1),

    /* Output descriptor - 1 output, and it is stereo. */
    1, AMF_StereoPin(0)
};