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



#include "AMF_ScalerNSmoothed.h"
#include "AMF_ScalerSmoothed.h"
#include <stdlib.h>

void AMF_ScalerNSmoothed_Render(AMF_ScalerNSmoothed * 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

#pragma optimize_for_speed
SEG_MOD_FAST_CODE  void AMF_ScalerNSmoothed_Render(AMF_ScalerNSmoothed * restrict instance,float * restrict * buffers,int tickSize) 
{
	AMF_ScalerSmoothed S = { AMF_Module_NULL_INIT };
	int numChannels;
	int channel;
	float *ptrs[2];

	numChannels = instance->b.inputPinCount;
	
	// Setup the data structure for the underlying AMF_ScalerSmoothed object
	// These initializations happens once
	S.ampSmoothing = instance->ampSmoothing;
	
	for (channel = 0; channel < numChannels; channel++)
	{
		S.ampTarget = instance->ampTarget[channel];
		// This has to be reset at the start of each channel
		S.amp = instance->amp[channel];

		// Input buffer
		ptrs[0] = buffers[channel];

		// Output buffer
		ptrs[1] = buffers[numChannels + channel];

		AMF_ScalerSmoothed_Render (&S, ptrs, tickSize);

		// Save the state variable back into the structure
		instance->amp[channel] = S.amp;
	}
}


SEG_MOD_SLOW_CONST const AMF_ModuleClass AMFClassScalerNSmoothed =
{
    /** Flags. */
    0,

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

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

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

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