/* $Id: dsp.h,v 4.10 1999/09/18 09:16:23 lcs Exp $ */

/*
     AHI - Hardware independent audio subsystem
     Copyright (C) 1996-1999 Martin Blom <martin@blom.org>
     
     This library is free software; you can redistribute it and/or
     modify it under the terms of the GNU Library General Public
     License as published by the Free Software Foundation; either
     version 2 of the License, or (at your option) any later version.
     
     This library is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     Library General Public License for more details.
     
     You should have received a copy of the GNU Library General Public
     License along with this library; if not, write to the
     Free Software Foundation, Inc., 59 Temple Place - Suite 330, Cambridge,
     MA 02139, USA.
*/

#ifndef _DSP_H_
#define _DSP_H_

#include <exec/types.h>
#include "ahi_def.h"

typedef void (*ECHOFUNC)( struct Echo *,
                          void *,
                          struct AHIPrivAudioCtrl * );

struct Echo
{
	ULONG	ahiecho_Delay;
	ECHOFUNC ahiecho_Code;		// The echo routine
	Fixed	ahiecho_FeedbackDS;	// Delayed signal to same channel
	Fixed	ahiecho_FeedbackDO;	// Delayed signal to other channel
	Fixed	ahiecho_FeedbackNS;	// Normal signal to same channel
	Fixed	ahiecho_FeedbackNO;	// Normal signal to other channel
	Fixed	ahiecho_MixN;		// Normal signal
	Fixed	ahiecho_MixD;		// Delayed signal
	ULONG	ahiecho_Offset;		// (&Buffer-&SrcPtr)/sizeof(ahiecho_Buffer[0])
	APTR	ahiecho_SrcPtr;		// Pointer to &Buffer
	APTR	ahiecho_DstPtr;		// Pointer to &(Buffer[Delay])
	APTR	ahiecho_EndPtr;		// Pointer to address after buffer
	ULONG	ahiecho_BufferLength;	// Delay buffer length in samples
	ULONG	ahiecho_BufferSize;	// Delay buffer size in bytes
	BYTE	ahiecho_Buffer[0];	// Delay buffer
};


#endif /* _DSP_H_ */