workbench/devs/AHI/Device/dsp.h

   1 /*
   2      AHI - Hardware independent audio subsystem
   3      Copyright (C) 1996-2005 Martin Blom <martin@blom.org>
   4
   5      This library is free software; you can redistribute it and/or
   6      modify it under the terms of the GNU Library General Public
   7      License as published by the Free Software Foundation; either
   8      version 2 of the License, or (at your option) any later version.
   9
  10      This library is distributed in the hope that it will be useful,
  11      but WITHOUT ANY WARRANTY; without even the implied warranty of
  12      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13      Library General Public License for more details.
  14
  15      You should have received a copy of the GNU Library General Public
  16      License along with this library; if not, write to the
  17      Free Software Foundation, Inc., 59 Temple Place - Suite 330, Cambridge,
  18      MA 02139, USA.
  19 */
  20
  21 #ifndef ahi_dsp_h
  22 #define ahi_dsp_h
  23
  24 #include <exec/types.h>
  25 #include "ahi_def.h"
  26
  27 struct Echo;
  28
  29 typedef void (*ECHOFUNC)( struct Echo *,
  30                           void *,
  31                           struct AHIPrivAudioCtrl * );
  32
  33 struct Echo
  34 {
  35         ULONG   ahiecho_Delay;
  36         ECHOFUNC ahiecho_Code;          // The echo routine
  37         Fixed   ahiecho_FeedbackDS;     // Delayed signal to same channel
  38         Fixed   ahiecho_FeedbackDO;     // Delayed signal to other channel
  39         Fixed   ahiecho_FeedbackNS;     // Normal signal to same channel
  40         Fixed   ahiecho_FeedbackNO;     // Normal signal to other channel
  41         Fixed   ahiecho_MixN;           // Normal signal
  42         Fixed   ahiecho_MixD;           // Delayed signal
  43         ULONG   ahiecho_Offset;         // (&Buffer-&SrcPtr)/sizeof(ahiecho_Buffer[0])
  44         APTR    ahiecho_SrcPtr;         // Pointer to &Buffer
  45         APTR    ahiecho_DstPtr;         // Pointer to &(Buffer[Delay])
  46         APTR    ahiecho_EndPtr;         // Pointer to address after buffer
  47         ULONG   ahiecho_BufferLength;   // Delay buffer length in samples
  48         ULONG   ahiecho_BufferSize;     // Delay buffer size in bytes
  49         BYTE    ahiecho_Buffer[0];      // Delay buffer
  50 };
  51
  52
  53 #endif /* ahi_dsp_h */