/***************************************************************************
                         externals.h  -  description
                             -------------------
    begin                : Wed May 15 2002
    copyright            : (C) 2002 by Pete Bernert
    email                : BlackDove@addcom.de
 ***************************************************************************/

/***************************************************************************
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version. See also the license.txt file for *
 *   additional informations.                                              *
 *                                                                         *
 ***************************************************************************/

#include "ao.h"

#ifndef PEOPS_EXTERNALS
#define PEOPS_EXTERNALS

//*************************************************************************//
// History of changes:
//
// 2002/05/15 - Pete
// - generic cleanup for the Peops release
//
//*************************************************************************//

#define max(a,b)            (((a) > (b)) ? (a) : (b))
#define min(a,b)            (((a) < (b)) ? (a) : (b))

////////////////////////////////////////////////////////////////////////
// spu defines
////////////////////////////////////////////////////////////////////////

// num of channels
#define MAXCHAN     24

///////////////////////////////////////////////////////////
// struct defines
///////////////////////////////////////////////////////////

// ADSR INFOS PER CHANNEL
typedef struct
{
 int            AttackModeExp;
 s32           AttackTime;
 s32           DecayTime;
 s32           SustainLevel;
 int            SustainModeExp;
 s32           SustainModeDec;
 s32           SustainTime;
 int            ReleaseModeExp;
 u32  ReleaseVal;
 s32           ReleaseTime;
 s32           ReleaseStartTime; 
 s32           ReleaseVol; 
 s32           lTime;
 s32           lVolume;
} ADSRInfo;

typedef struct
{
 int            State;
 int            AttackModeExp;
 int            AttackRate;
 int            DecayRate;
 int            SustainLevel;
 int            SustainModeExp;
 int            SustainIncrease;
 int            SustainRate;
 int            ReleaseModeExp;
 int            ReleaseRate;
 int            EnvelopeVol;
 s32           lVolume;
 s32           lDummy1;
 s32           lDummy2;
} ADSRInfoEx;
              
///////////////////////////////////////////////////////////

// Tmp Flags

// used for debug channel muting
#define FLAG_MUTE  1

///////////////////////////////////////////////////////////

// MAIN CHANNEL STRUCT
typedef struct
{
 int               bNew;                               // start flag

 int               iSBPos;                             // mixing stuff
 int               spos;
 int               sinc;
 int               SB[32+1];
 int               sval;

 u8 *   pStart;                             // start ptr into sound mem
 u8 *   pCurr;                              // current pos in sound mem
 u8 *   pLoop;                              // loop ptr in sound mem

 int               bOn;                                // is channel active (sample playing?)
 int               bStop;                              // is channel stopped (sample _can_ still be playing, ADSR Release phase)
 int               iActFreq;                           // current psx pitch
 int               iUsedFreq;                          // current pc pitch
 int               iLeftVolume;                        // left volume
 int               iLeftVolRaw;                        // left psx volume value
 int               bIgnoreLoop;                        // ignore loop bit, if an external loop address is used
 int               iRightVolume;                       // right volume
 int               iRightVolRaw;                       // right psx volume value
 int               iRawPitch;                          // raw pitch (0...3fff)
 int               iIrqDone;                           // debug irq done flag
 int               s_1;                                // last decoding infos
 int               s_2;
 int               bRVBActive;                         // reverb active flag
 int               iRVBOffset;                         // reverb offset
 int               iRVBRepeat;                         // reverb repeat
 int               bNoise;                             // noise active flag
 int               bFMod;                              // freq mod (0=off, 1=sound channel, 2=freq channel)
 int               iOldNoise;                          // old noise val for this channel   
 ADSRInfo          ADSR;                               // active ADSR settings
 ADSRInfoEx        ADSRX;                              // next ADSR settings (will be moved to active on sample start)

} SPUCHAN;

///////////////////////////////////////////////////////////

typedef struct
{
 int StartAddr;      // reverb area start addr in samples
 int CurrAddr;       // reverb area curr addr in samples

 int Enabled;
 int VolLeft;
 int VolRight;
 int iLastRVBLeft;
 int iLastRVBRight;
 int iRVBLeft;
 int iRVBRight;


 int FB_SRC_A;       // (offset)
 int FB_SRC_B;       // (offset)
 int IIR_ALPHA;      // (coef.)
 int ACC_COEF_A;     // (coef.)
 int ACC_COEF_B;     // (coef.)
 int ACC_COEF_C;     // (coef.)
 int ACC_COEF_D;     // (coef.)
 int IIR_COEF;       // (coef.)
 int FB_ALPHA;       // (coef.)
 int FB_X;           // (coef.)
 int IIR_DEST_A0;    // (offset)
 int IIR_DEST_A1;    // (offset)
 int ACC_SRC_A0;     // (offset)
 int ACC_SRC_A1;     // (offset)
 int ACC_SRC_B0;     // (offset)
 int ACC_SRC_B1;     // (offset)
 int IIR_SRC_A0;     // (offset)
 int IIR_SRC_A1;     // (offset)
 int IIR_DEST_B0;    // (offset)
 int IIR_DEST_B1;    // (offset)
 int ACC_SRC_C0;     // (offset)
 int ACC_SRC_C1;     // (offset)
 int ACC_SRC_D0;     // (offset)
 int ACC_SRC_D1;     // (offset)
 int IIR_SRC_B1;     // (offset)
 int IIR_SRC_B0;     // (offset)
 int MIX_DEST_A0;    // (offset)
 int MIX_DEST_A1;    // (offset)
 int MIX_DEST_B0;    // (offset)
 int MIX_DEST_B1;    // (offset)
 int IN_COEF_L;      // (coef.)
 int IN_COEF_R;      // (coef.)
} REVERBInfo;

#endif // PEOPS_EXTERNALS
