ref: b5950693c004b9d2024c078b8c957c3139c5abff
dir: /Game/src/audiolib/guswave.c/
/*
Copyright (C) 1994-1995 Apogee Software, Ltd.
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.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/**********************************************************************
file: GUSWAVE.C
author: James R. Dose
date: March 23, 1994
Digitized sound playback routines for the Gravis Ultrasound.
(c) Copyright 1994 James R. Dose. All Rights Reserved.
**********************************************************************/
#include <stdlib.h>
#include <conio.h>
#include <dos.h>
#include <stdio.h>
#include <io.h>
#include <string.h>
#include "debugio.h"
#include "interrup.h"
#include "ll_man.h"
#include "pitch.h"
#include "user.h"
#include "multivoc.h"
#include "_guswave.h"
#include "newgf1.h"
#include "gusmidi.h"
#include "guswave.h"
#define ATR_INDEX 0x3c0
#define STATUS_REGISTER_1 0x3da
#define SetBorderColor(color) \
{ \
inp (STATUS_REGISTER_1); \
outp (ATR_INDEX,0x31); \
outp (ATR_INDEX,color); \
}
static const int GUSWAVE_PanTable[ 32 ] =
{
8, 9, 10, 11, 11, 12, 13, 14,
15, 14, 13, 12, 11, 10, 9, 8,
7, 6, 5, 4, 4, 3, 2, 1,
0, 1, 2, 3, 4, 5, 6, 7
};
static voicelist VoiceList;
static voicelist VoicePool;
static voicestatus VoiceStatus[ MAX_VOICES ];
//static
VoiceNode GUSWAVE_Voices[ VOICES ];
static int GUSWAVE_VoiceHandle = GUSWAVE_MinVoiceHandle;
static int GUSWAVE_MaxVoices = VOICES;
//static
int GUSWAVE_Installed = FALSE;
static void ( *GUSWAVE_CallBackFunc )( unsigned long ) = NULL;
// current volume for dig audio - from 0 to 4095
static int GUSWAVE_Volume = MAX_VOLUME;
static int GUSWAVE_SwapLeftRight = FALSE;
static int GUS_Debug = FALSE;
extern int GUSMIDI_Installed;
int GUSWAVE_ErrorCode = GUSWAVE_Ok;
#define GUSWAVE_SetErrorCode( status ) \
GUSWAVE_ErrorCode = ( status );
/*---------------------------------------------------------------------
Function: GUSWAVE_ErrorString
Returns a pointer to the error message associated with an error
number. A -1 returns a pointer the current error.
---------------------------------------------------------------------*/
char *GUSWAVE_ErrorString
(
int ErrorNumber
)
{
char *ErrorString;
switch( ErrorNumber )
{
case GUSWAVE_Warning :
case GUSWAVE_Error :
ErrorString = GUSWAVE_ErrorString( GUSWAVE_ErrorCode );
break;
case GUSWAVE_Ok :
ErrorString = "GUSWAVE ok.";
break;
case GUSWAVE_GUSError :
ErrorString = GUS_ErrorString( GUS_Error );
break;
case GUSWAVE_NotInstalled :
ErrorString = "GUSWAVE not installed.";
break;
case GUSWAVE_NoVoices :
ErrorString = "No free voices available to GUSWAVE.";
break;
case GUSWAVE_UltraNoMem :
ErrorString = "Not enough Ultrasound memory available for GUSWAVE.";
break;
case GUSWAVE_UltraNoMemMIDI :
ErrorString = "Not enough Ultrasound memory available for GUSWAVE. "
"Try initializing Sound FX before Music.";
break;
case GUSWAVE_VoiceNotFound :
ErrorString = "No voice with matching handle found.";
break;
case GUSWAVE_InvalidVOCFile :
ErrorString = "Invalid VOC file passed in to GUSWAVE.";
break;
case GUSWAVE_InvalidWAVFile :
ErrorString = "Invalid WAV file passed in to GUSWAVE.";
break;
default :
ErrorString = "Unknown GUSWAVE error code.";
break;
}
return( ErrorString );
}
/*---------------------------------------------------------------------
Function: GUSWAVE_CallBack
GF1 callback service routine.
---------------------------------------------------------------------*/
char GUS_Silence8[ 1024 ] = //256 ] =
{
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80
};
//unsigned short GUS_Silence16[ 128 ] =
unsigned short GUS_Silence16[ 512 ] =
{
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
};
static int LOADDS GUSWAVE_CallBack
(
int reason,
int voice,
unsigned char **buf,
unsigned long *size
)
{
VoiceNode *Voice;
playbackstatus status;
// this function is called from an interrupt
// remember not to make any DOS or BIOS calls from here
// also don't call any C library functions unless you are sure that
// they are reentrant
// restore our DS register
if ( VoiceStatus[ voice ].playing == FALSE )
{
return( DIG_DONE );
}
if ( reason == DIG_MORE_DATA )
{
// SetBorderColor(16);
Voice = VoiceStatus[ voice ].Voice;
if ( ( Voice != NULL ) && ( Voice->Playing ) )
/*
{
*buf = ( unsigned char * )GUS_Silence16;
*size = 1024;
SetBorderColor(0);
return( DIG_MORE_DATA );
}
*/
{
status = Voice->GetSound( Voice );
if ( status != SoundDone )
{
if ( ( Voice->sound == NULL ) || ( status == NoMoreData ) )
{
if ( Voice->bits == 8 )
{
*buf = GUS_Silence8;
}
else
{
*buf = ( unsigned char * )GUS_Silence16;
}
*size = 256;
}
else
{
*buf = Voice->sound;
*size = Voice->length;
}
return( DIG_MORE_DATA );
}
}
// SetBorderColor(16);
return( DIG_DONE );
}
if ( reason == DIG_DONE )
{
Voice = VoiceStatus[ voice ].Voice;
VoiceStatus[ voice ].playing = FALSE;
if ( Voice != NULL )
{
Voice->Active = FALSE;
Voice->Playing = FALSE;
// I'm commenting this out because a -1 could cause a crash if it
// is sent to the GF1 code. This shouldn't be necessary since
// Active should be false when GF1voice is -1, but this is just
// a precaution. Adjust the pan on the wrong voice is a lot
// more pleasant than a crash!
// Voice->GF1voice = -1;
LL_Remove( VoiceNode, &VoiceList, Voice );
LL_AddToTail( VoiceNode, &VoicePool, Voice );
}
if ( GUSWAVE_CallBackFunc )
{
GUSWAVE_CallBackFunc( Voice->callbackval );
}
}
return( DIG_DONE );
}
/*---------------------------------------------------------------------
Function: GUSWAVE_DebugCallBack
GF1 callback service routine with debugging info.
---------------------------------------------------------------------*/
static int LOADDS GUSWAVE_DebugCallBack
(
int reason,
int voice,
unsigned char **buf,
unsigned long *size
)
{
VoiceNode *Voice;
// this function is called from an interrupt
// remember not to make any DOS or BIOS calls from here
// also don't call any C library functions unless you are sure that
// they are reentrant
// restore our DS register
if ( VoiceStatus[ voice ].playing == FALSE )
{
// DB_printf( "GUS Voice %d not playing.\n", voice );
DB_printf( "GUS Voice " );
DB_PrintNum( voice );
DB_printf( " not playing.\n" );
return( DIG_DONE );
}
if ( reason == DIG_MORE_DATA )
{
Voice = VoiceStatus[ voice ].Voice;
// DB_printf( "Voice %d : More data -- ", Voice );
DB_printf( "Voice " );
DB_PrintNum( voice );
DB_printf( " : More data -- " );
if ( Voice != NULL )
{
if ( Voice->Playing )
{
GUSWAVE_GetNextVOCBlock( Voice );
if ( Voice->Playing )
{
// DB_printf( "More data -- size = %u blocklength = %u\n",
// Voice->length, Voice->BlockLength );
DB_printf( "More data -- size = " );
DB_PrintNum( Voice->length );
DB_printf( " blocklength = " );
DB_PrintNum( Voice->BlockLength );
DB_printf( "\n" );
*buf = Voice->sound;
*size = Voice->length;
return( DIG_MORE_DATA );
}
else
{
DB_printf( "Voice done.\n" );
}
}
else
{
DB_printf( "Voice not active.\n" );
}
}
else
{
DB_printf( " NULL Voice\n" );
}
return( DIG_DONE );
}
if ( reason == DIG_DONE )
{
VoiceStatus[ voice ].playing = FALSE;
Voice = VoiceStatus[ voice ].Voice;
// DB_printf( "Voice %d : Done -- ", Voice );
DB_printf( "Voice " );
DB_PrintNum( voice );
DB_printf( " : Done -- " );
if ( Voice != NULL )
{
DB_printf( "Ok\n" );
Voice->Active = FALSE;
Voice->Playing = FALSE;
// I'm commenting this out because a -1 could cause a crash if it
// is sent to the GF1 code. This shouldn't be necessary since
// Active should be false when GF1voice is -1, but this is just
// a precaution. Adjust the pan on the wrong voice is a lot
// more pleasant than a crash!
// Voice->GF1voice = -1;
LL_Remove( VoiceNode, &VoiceList, Voice );
LL_AddToTail( VoiceNode, &VoicePool, Voice );
}
else
{
DB_printf( "Null voice\n" );
}
if ( GUSWAVE_CallBackFunc )
{
GUSWAVE_CallBackFunc( Voice->callbackval );
}
}
return( DIG_DONE );
}
/*---------------------------------------------------------------------
Function: GUSWAVE_GetVoice
Locates the voice with the specified handle.
---------------------------------------------------------------------*/
static VoiceNode *GUSWAVE_GetVoice
(
int handle
)
{
VoiceNode *voice;
unsigned flags;
flags = DisableInterrupts();
voice = VoiceList.start;
while( voice != NULL )
{
if ( handle == voice->handle )
{
break;
}
voice = voice->next;
}
RestoreInterrupts( flags );
if ( voice == NULL )
{
GUSWAVE_SetErrorCode( GUSWAVE_VoiceNotFound );
}
return( voice );
}
/*---------------------------------------------------------------------
Function: GUSWAVE_VoicePlaying
Checks if the voice associated with the specified handle is
playing.
---------------------------------------------------------------------*/
int GUSWAVE_VoicePlaying
(
int handle
)
{
VoiceNode *voice;
voice = GUSWAVE_GetVoice( handle );
if ( voice != NULL )
{
return( voice->Active );
}
return( FALSE );
}
/*---------------------------------------------------------------------
Function: GUSWAVE_VoicesPlaying
Determines the number of currently active voices.
---------------------------------------------------------------------*/
int GUSWAVE_VoicesPlaying
(
void
)
{
int index;
int NumVoices = 0;
unsigned flags;
flags = DisableInterrupts();
for( index = 0; index < GUSWAVE_MaxVoices; index++ )
{
if ( GUSWAVE_Voices[ index ].Active )
{
NumVoices++;
}
}
RestoreInterrupts( flags );
if ( GUS_Debug )
{
DB_printf( "Number of voices = %d.\n", NumVoices );
}
return( NumVoices );
}
/*---------------------------------------------------------------------
Function: GUSWAVE_Kill
Stops output of the voice associated with the specified handle.
---------------------------------------------------------------------*/
int GUSWAVE_Kill
(
int handle
)
{
VoiceNode *voice;
unsigned flags;
flags = DisableInterrupts();
voice = GUSWAVE_GetVoice( handle );
if ( voice == NULL )
{
RestoreInterrupts( flags );
GUSWAVE_SetErrorCode( GUSWAVE_VoiceNotFound );
if ( GUS_Debug )
{
DB_printf( "Could not find voice to kill.\n" );
}
return( GUSWAVE_Warning );
}
RestoreInterrupts( flags );
if ( !GUS_Debug )
{
if ( voice->Active )
{
gf1_stop_digital( voice->GF1voice );
}
}
else
{
DB_printf( "Kill - GUS Voice %d ", voice->GF1voice );
if ( voice->Active )
{
DB_printf( "active\n" );
gf1_stop_digital( voice->GF1voice );
}
else
{
DB_printf( "inactive\n" );
}
}
// RestoreInterrupts( flags );
return( GUSWAVE_Ok );
}
/*---------------------------------------------------------------------
Function: GUSWAVE_KillAllVoices
Stops output of all currently active voices.
---------------------------------------------------------------------*/
int GUSWAVE_KillAllVoices
(
void
)
{
int i;
unsigned flags;
if ( !GUSWAVE_Installed )
{
return( GUSWAVE_Ok );
}
if ( GUS_Debug )
{
DB_printf( "Kill All Voices\n" );
}
flags = DisableInterrupts();
// Remove all the voices from the list
for( i = 0; i < GUSWAVE_MaxVoices; i++ )
{
if ( GUSWAVE_Voices[ i ].Active )
{
// GUSWAVE_Kill( GUSWAVE_Voices[ i ].handle );
gf1_stop_digital( GUSWAVE_Voices[ i ].GF1voice );
}
}
for( i = 0; i < MAX_VOICES; i++ )
{
VoiceStatus[ i ].playing = FALSE;
VoiceStatus[ i ].Voice = NULL;
}
VoicePool.start = NULL;
VoicePool.end = NULL;
VoiceList.start = NULL;
VoiceList.end = NULL;
for( i = 0; i < GUSWAVE_MaxVoices; i++ )
{
GUSWAVE_Voices[ i ].Active = FALSE;
if ( GUSWAVE_Voices[ i ].mem != NULL )
{
LL_AddToTail( VoiceNode, &VoicePool, &GUSWAVE_Voices[ i ] );
}
}
RestoreInterrupts( flags );
return( GUSWAVE_Ok );
}
/*---------------------------------------------------------------------
Function: GUSWAVE_SetPitch
Sets the pitch for the voice associated with the specified handle.
---------------------------------------------------------------------*/
int GUSWAVE_SetPitch
(
int handle,
int pitchoffset
)
{
VoiceNode *voice;
unsigned flags;
flags = DisableInterrupts();
voice = GUSWAVE_GetVoice( handle );
if ( voice == NULL )
{
RestoreInterrupts( flags );
GUSWAVE_SetErrorCode( GUSWAVE_VoiceNotFound );
return( GUSWAVE_Warning );
}
if ( voice->Active )
{
voice->PitchScale = PITCH_GetScale( pitchoffset );
voice->RateScale = ( voice->SamplingRate * voice->PitchScale ) >> 16;
gf1_dig_set_freq( voice->GF1voice, voice->RateScale );
}
RestoreInterrupts( flags );
return( GUSWAVE_Ok );
}
/*---------------------------------------------------------------------
Function: GUSWAVE_SetPan3D
Sets the pan position of the voice with the specified handle.
---------------------------------------------------------------------*/
int GUSWAVE_SetPan3D
(
int handle,
int angle,
int distance
)
{
VoiceNode *voice;
int pan;
unsigned flags;
flags = DisableInterrupts();
voice = GUSWAVE_GetVoice( handle );
if ( voice == NULL )
{
RestoreInterrupts( flags );
GUSWAVE_SetErrorCode( GUSWAVE_VoiceNotFound );
return( GUSWAVE_Warning );
}
if ( voice->Active )
{
angle &= 31;
pan = GUSWAVE_PanTable[ angle ];
if ( GUSWAVE_SwapLeftRight )
{
pan = 15 - pan;
}
distance = max( 0, distance );
distance = min( 255, distance );
voice->Volume = 255 - distance;
voice->Pan = pan;
gf1_dig_set_pan( voice->GF1voice, pan );
gf1_dig_set_vol( voice->GF1voice, GUSWAVE_Volume - distance * 4 );
}
RestoreInterrupts( flags );
return( GUSWAVE_Ok );
}
/*---------------------------------------------------------------------
Function: GUSWAVE_SetVolume
Sets the total volume of the digitized sounds.
---------------------------------------------------------------------*/
void GUSWAVE_SetVolume
(
int volume
)
{
int i;
volume = max( 0, volume );
volume = min( 255, volume );
GUSWAVE_Volume = MAX_VOLUME - ( 255 - volume ) * 4;
for( i = 0; i < GUSWAVE_MaxVoices; i++ )
{
if ( GUSWAVE_Voices[ i ].Active )
{
gf1_dig_set_vol( GUSWAVE_Voices[ i ].GF1voice,
GUSWAVE_Volume - ( 255 - GUSWAVE_Voices[ i ].Volume ) * 4 );
}
}
}
/*---------------------------------------------------------------------
Function: GUSWAVE_GetVolume
Returns the total volume of the digitized sounds.
---------------------------------------------------------------------*/
int GUSWAVE_GetVolume
(
void
)
{
return( 255 - ( ( MAX_VOLUME - GUSWAVE_Volume ) / 4 ) );
}
/*---------------------------------------------------------------------
Function: GUSWAVE_AllocVoice
Retrieve an inactive or lower priority voice for output.
---------------------------------------------------------------------*/
static VoiceNode *GUSWAVE_AllocVoice
(
int priority
)
{
VoiceNode *voice;
VoiceNode *node;
unsigned flags;
// If we don't have any free voices, check if we have a higher
// priority than one that is playing.
if ( GUSWAVE_VoicesPlaying() >= GUSWAVE_MaxVoices )
{
flags = DisableInterrupts();
node = VoiceList.start;
voice = node;
while( node != NULL )
{
if ( node->priority < voice->priority )
{
voice = node;
}
node = node->next;
}
RestoreInterrupts( flags );
if ( priority >= voice->priority )
{
GUSWAVE_Kill( voice->handle );
}
}
// Check if any voices are in the voice pool
flags = DisableInterrupts();
voice = VoicePool.start;
if ( voice != NULL )
{
LL_Remove( VoiceNode, &VoicePool, voice );
}
RestoreInterrupts( flags );
if ( voice != NULL )
{
do
{
GUSWAVE_VoiceHandle++;
if ( GUSWAVE_VoiceHandle < GUSWAVE_MinVoiceHandle )
{
GUSWAVE_VoiceHandle = GUSWAVE_MinVoiceHandle;
}
}
while( GUSWAVE_VoicePlaying( GUSWAVE_VoiceHandle ) );
voice->handle = GUSWAVE_VoiceHandle;
}
return( voice );
}
/*---------------------------------------------------------------------
Function: GUSWAVE_VoiceAvailable
Checks if a voice can be play at the specified priority.
---------------------------------------------------------------------*/
int GUSWAVE_VoiceAvailable
(
int priority
)
{
VoiceNode *voice;
VoiceNode *node;
unsigned flags;
if ( GUSWAVE_VoicesPlaying() < GUSWAVE_MaxVoices )
{
return( TRUE );
}
flags = DisableInterrupts();
node = VoiceList.start;
voice = node;
while( node != NULL )
{
if ( node->priority < voice->priority )
{
voice = node;
}
node = node->next;
}
RestoreInterrupts( flags );
if ( priority >= voice->priority )
{
return( TRUE );
}
return( FALSE );
}
/*---------------------------------------------------------------------
Function: GUSWAVE_GetNextVOCBlock
Interperate the information of a VOC format sound file.
---------------------------------------------------------------------*/
playbackstatus GUSWAVE_GetNextVOCBlock
(
VoiceNode *voice
)
{
unsigned char *ptr;
int blocktype;
int lastblocktype;
unsigned long blocklength;
unsigned long samplespeed;
unsigned int tc;
int packtype;
int voicemode;
int done;
unsigned BitsPerSample;
unsigned Channels;
unsigned Format;
if ( voice->BlockLength > 0 )
{
voice->sound += MAX_BLOCK_LENGTH;
voice->length = min( voice->BlockLength, MAX_BLOCK_LENGTH );
voice->BlockLength -= voice->length;
return( KeepPlaying );
}
ptr = ( unsigned char * )voice->NextBlock;
voice->Playing = TRUE;
voicemode = 0;
lastblocktype = 0;
packtype = 0;
done = FALSE;
while( !done )
{
// Stop playing if we get a NULL pointer
if ( ptr == NULL )
{
voice->Playing = FALSE;
done = TRUE;
break;
}
blocktype = ( int )*ptr;
blocklength = ( *( unsigned long * )( ptr + 1 ) ) & 0x00ffffff;
ptr += 4;
switch( blocktype )
{
case 0 :
// End of data
voice->Playing = FALSE;
done = TRUE;
break;
case 1 :
// Sound data block
voice->bits = 8;
if ( lastblocktype != 8 )
{
tc = ( unsigned int )*ptr << 8;
packtype = *( ptr + 1 );
}
ptr += 2;
blocklength -= 2;
samplespeed = 256000000L / ( 65536 - tc );
// Skip packed or stereo data
if ( ( packtype != 0 ) || ( voicemode != 0 ) )
{
ptr += blocklength;
}
else
{
done = TRUE;
}
voicemode = 0;
break;
case 2 :
// Sound continuation block
samplespeed = voice->SamplingRate;
done = TRUE;
break;
case 3 :
// Silence
// Not implimented.
ptr += blocklength;
break;
case 4 :
// Marker
// Not implimented.
ptr += blocklength;
break;
case 5 :
// ASCII string
// Not implimented.
ptr += blocklength;
break;
case 6 :
// Repeat begin
voice->LoopCount = *( unsigned short * )ptr;
ptr += blocklength;
voice->LoopStart = ptr;
break;
case 7 :
// Repeat end
ptr += blocklength;
if ( lastblocktype == 6 )
{
voice->LoopCount = 0;
}
else
{
if ( ( voice->LoopCount > 0 ) && ( voice->LoopStart != NULL ) )
{
ptr = voice->LoopStart;
if ( voice->LoopCount < 0xffff )
{
voice->LoopCount--;
if ( voice->LoopCount == 0 )
{
voice->LoopStart = NULL;
}
}
}
}
break;
case 8 :
// Extended block
voice->bits = 8;
tc = *( unsigned short * )ptr;
packtype = *( ptr + 2 );
voicemode = *( ptr + 3 );
ptr += blocklength;
break;
case 9 :
// New sound data block
samplespeed = *( unsigned long * )ptr;
BitsPerSample = ( unsigned )*( ptr + 4 );
Channels = ( unsigned )*( ptr + 5 );
Format = ( unsigned )*( unsigned short * )( ptr + 6 );
if ( ( BitsPerSample == 8 ) && ( Channels == 1 ) &&
( Format == VOC_8BIT ) )
{
ptr += 12;
blocklength -= 12;
voice->bits = 8;
done = TRUE;
}
else if ( ( BitsPerSample == 16 ) && ( Channels == 1 ) &&
( Format == VOC_16BIT ) )
{
ptr += 12;
blocklength -= 12;
voice->bits = 16;
done = TRUE;
}
else
{
ptr += blocklength;
}
break;
default :
// Unknown data. Probably not a VOC file.
voice->Playing = FALSE;
done = TRUE;
break;
}
lastblocktype = blocktype;
}
if ( voice->Playing )
{
voice->NextBlock = ptr + blocklength;
voice->sound = ptr;
voice->SamplingRate = samplespeed;
voice->RateScale = ( voice->SamplingRate * voice->PitchScale ) >> 16;
voice->length = min( blocklength, MAX_BLOCK_LENGTH );
voice->BlockLength = blocklength - voice->length;
return( KeepPlaying );
}
return( SoundDone );
}
/*---------------------------------------------------------------------
Function: GUSWAVE_GetNextWAVBlock
Controls playback of demand fed data.
---------------------------------------------------------------------*/
playbackstatus GUSWAVE_GetNextWAVBlock
(
VoiceNode *voice
)
{
if ( voice->BlockLength <= 0 )
{
if ( voice->LoopStart == NULL )
{
voice->Playing = FALSE;
return( SoundDone );
}
voice->BlockLength = voice->LoopSize;
voice->NextBlock = voice->LoopStart;
voice->length = 0;
}
voice->sound = voice->NextBlock;
voice->length = min( voice->BlockLength, 0x8000 );
voice->NextBlock += voice->length;
voice->BlockLength -= voice->length;
return( KeepPlaying );
}
/*---------------------------------------------------------------------
Function: GUSWAVE_GetNextDemandFeedBlock
Controls playback of demand fed data.
---------------------------------------------------------------------*/
playbackstatus GUSWAVE_GetNextDemandFeedBlock
(
VoiceNode *voice
)
{
if ( voice->BlockLength > 0 )
{
voice->sound += voice->length;
voice->length = min( voice->BlockLength, 0x8000 );
voice->BlockLength -= voice->length;
return( KeepPlaying );
}
if ( voice->DemandFeed == NULL )
{
return( SoundDone );
}
( voice->DemandFeed )( &voice->sound, &voice->BlockLength );
// voice->sound = GUS_Silence16;
// voice->BlockLength = 256;
voice->length = min( voice->BlockLength, 0x8000 );
voice->BlockLength -= voice->length;
if ( ( voice->length > 0 ) && ( voice->sound != NULL ) )
{
return( KeepPlaying );
}
return( NoMoreData );
}
/*---------------------------------------------------------------------
Function: GUSWAVE_Play
Begins playback of digitized sound.
---------------------------------------------------------------------*/
int GUSWAVE_Play
(
VoiceNode *voice,
int angle,
int volume,
int channels
)
{
int VoiceNumber;
int type;
int pan;
unsigned flags;
int ( *servicefunction )( int reason, int voice, unsigned char **buf, unsigned long *size );
type = 0;
if ( channels != 1 )
{
type |= TYPE_STEREO;
}
if ( voice->bits == 8 )
{
type |= TYPE_8BIT;
type |= TYPE_INVERT_MSB;
}
voice->GF1voice = -1;
angle &= 31;
pan = GUSWAVE_PanTable[ angle ];
if ( GUSWAVE_SwapLeftRight )
{
pan = 15 - pan;
}
voice->Pan = pan;
volume = max( 0, volume );
volume = min( 255, volume );
voice->Volume = volume;
if ( !GUS_Debug )
{
servicefunction = GUSWAVE_CallBack;
}
else
{
servicefunction = GUSWAVE_DebugCallBack;
}
VoiceNumber = gf1_play_digital( 0, voice->sound, voice->length,
voice->mem, GUSWAVE_Volume - ( 255 - volume ) * 4, pan,
voice->RateScale, type, &GUS_HoldBuffer, servicefunction );
if ( VoiceNumber == NO_MORE_VOICES )
{
if ( GUS_Debug )
{
DB_printf( "Out of voices.\n" );
}
flags = DisableInterrupts();
LL_AddToTail( VoiceNode, &VoicePool, voice );
RestoreInterrupts( flags );
GUSWAVE_SetErrorCode( GUSWAVE_NoVoices );
return( GUSWAVE_Warning );
}
flags = DisableInterrupts();
voice->GF1voice = VoiceNumber;
voice->Active = TRUE;
LL_AddToTail( VoiceNode, &VoiceList, voice );
VoiceStatus[ VoiceNumber ].playing = TRUE;
VoiceStatus[ VoiceNumber ].Voice = voice;
if ( GUS_Debug )
{
DB_printf( "GUS voice %d playing\n", VoiceNumber );
}
RestoreInterrupts( flags );
return( voice->handle );
}
/*---------------------------------------------------------------------
Function: GUSWAVE_PlayVOC
Begins playback of digitized sound.
---------------------------------------------------------------------*/
int GUSWAVE_PlayVOC
(
char *sample,
int pitchoffset,
int angle,
int volume,
int priority,
unsigned long callbackval
)
{
int handle;
int status;
playbackstatus soundstatus;
VoiceNode *voice;
unsigned flags;
// Make sure it's a valid VOC file.
status = strncmp( sample, "Creative Voice File", 19 );
if ( status != 0 )
{
// Tell multivoc that we had a bad VOC file
MV_ErrorCode = MV_InvalidVOCFile;
GUSWAVE_SetErrorCode( GUSWAVE_InvalidVOCFile );
return( GUSWAVE_Error );
}
// Request a voice from the voice pool
voice = GUSWAVE_AllocVoice( priority );
if ( voice == NULL )
{
if ( GUS_Debug )
{
DB_printf( "No more voices. Skipping sound.\n" );
}
GUSWAVE_SetErrorCode( GUSWAVE_NoVoices );
return( GUSWAVE_Warning );
}
voice->NextBlock = sample + *( unsigned short int * )( sample + 0x14 );
voice->LoopStart = NULL;
voice->LoopCount = 0;
voice->BlockLength = 0;
voice->PitchScale = PITCH_GetScale( pitchoffset );
voice->wavetype = VOC;
voice->bits = 8;
voice->GetSound = GUSWAVE_GetNextVOCBlock;
voice->length = 0;
voice->next = NULL;
voice->prev = NULL;
voice->priority = priority;
voice->callbackval = callbackval;
soundstatus = GUSWAVE_GetNextVOCBlock( voice );
if ( soundstatus == SoundDone )
{
flags = DisableInterrupts();
LL_AddToTail( VoiceNode, &VoicePool, voice );
RestoreInterrupts( flags );
if ( GUS_Debug )
{
DB_printf( "Voice ended before playback.\n" );
}
// Tell multivoc that we had a bad VOC file
MV_ErrorCode = MV_InvalidVOCFile;
GUSWAVE_SetErrorCode( GUSWAVE_InvalidVOCFile );
return( GUSWAVE_Error );
}
handle = GUSWAVE_Play( voice, angle, volume, 1 );
return( handle );
}
/*---------------------------------------------------------------------
Function: GUSWAVE_PlayWAV
Begins playback of digitized sound.
---------------------------------------------------------------------*/
int GUSWAVE_PlayWAV
(
char *sample,
int pitchoffset,
int angle,
int volume,
int priority,
unsigned long callbackval
)
{
VoiceNode *voice;
int handle;
int channels;
int bits;
int length;
riff_header *riff;
format_header *format;
data_header *data;
riff = ( riff_header * )sample;
if ( ( strncmp( riff->RIFF, "RIFF", 4 ) != 0 ) ||
( strncmp( riff->WAVE, "WAVE", 4 ) != 0 ) ||
( strncmp( riff->fmt, "fmt ", 4) != 0 ) )
{
GUSWAVE_SetErrorCode( GUSWAVE_InvalidWAVFile );
return( GUSWAVE_Error );
}
format = ( format_header * )( riff + 1 );
data = ( data_header * )( ( ( char * )format ) + riff->format_size );
if ( format->wFormatTag != 1 )
{
GUSWAVE_SetErrorCode( GUSWAVE_InvalidWAVFile );
return( GUSWAVE_Error );
}
channels = format->nChannels;
if ( ( channels != 1 ) && ( channels != 2 ) )
{
GUSWAVE_SetErrorCode( GUSWAVE_InvalidWAVFile );
return( GUSWAVE_Error );
}
bits = format->nBitsPerSample;
if ( ( bits != 8 ) && ( bits != 16 ) )
{
GUSWAVE_SetErrorCode( GUSWAVE_InvalidWAVFile );
return( GUSWAVE_Error );
}
if ( strncmp( data->DATA, "data", 4 ) != 0 )
{
GUSWAVE_SetErrorCode( GUSWAVE_InvalidWAVFile );
return( GUSWAVE_Error );
}
// Request a voice from the voice pool
voice = GUSWAVE_AllocVoice( priority );
if ( voice == NULL )
{
if ( GUS_Debug )
{
DB_printf( "No more voices. Skipping sound.\n" );
}
GUSWAVE_SetErrorCode( GUSWAVE_NoVoices );
return( GUSWAVE_Warning );
}
voice->wavetype = WAV;
voice->bits = bits;
voice->GetSound = GUSWAVE_GetNextWAVBlock;
length = data->size;
voice->Playing = TRUE;
voice->DemandFeed = NULL;
voice->LoopStart = NULL;
voice->LoopCount = 0;
voice->length = min( length, 0x8000 );
voice->BlockLength = length - voice->length;// min( loopend + 1, data->size );
voice->sound = ( char * )( data + 1 );
voice->NextBlock = voice->sound + voice->length;
voice->next = NULL;
voice->prev = NULL;
voice->priority = priority;
voice->callbackval = callbackval;
voice->LoopStart = NULL;// voice->NextBlock + loopstart;
voice->LoopEnd = NULL;//voice->NextBlock + min( loopend, data->size - 1 );
voice->LoopSize = 0;//( voice->LoopEnd - voice->LoopStart ) + 1;
voice->PitchScale = PITCH_GetScale( pitchoffset );
voice->SamplingRate = format->nSamplesPerSec;
voice->RateScale = ( voice->SamplingRate * voice->PitchScale ) >> 16;
handle = GUSWAVE_Play( voice, angle, volume, channels );
return( handle );
}
/*---------------------------------------------------------------------
Function: GUSWAVE_StartDemandFeedPlayback
Begins playback of digitized sound.
---------------------------------------------------------------------*/
int GUSWAVE_StartDemandFeedPlayback
(
void ( *function )( char **ptr, unsigned long *length ),
int channels,
int bits,
int rate,
int pitchoffset,
int angle,
int volume,
int priority,
unsigned long callbackval
)
{
VoiceNode *voice;
int handle;
// Request a voice from the voice pool
voice = GUSWAVE_AllocVoice( priority );
if ( voice == NULL )
{
if ( GUS_Debug )
{
DB_printf( "No more voices. Skipping sound.\n" );
}
GUSWAVE_SetErrorCode( GUSWAVE_NoVoices );
return( GUSWAVE_Warning );
}
voice->wavetype = DemandFeed;
voice->bits = bits;
voice->GetSound = GUSWAVE_GetNextDemandFeedBlock;
voice->Playing = TRUE;
voice->DemandFeed = function;
voice->LoopStart = NULL;
voice->LoopCount = 0;
voice->BlockLength = 0;
voice->length = 256;
voice->sound = ( bits == 8 ) ? GUS_Silence8 : ( char * )GUS_Silence16;
voice->NextBlock = NULL;
voice->next = NULL;
voice->prev = NULL;
voice->priority = priority;
voice->callbackval = callbackval;
voice->PitchScale = PITCH_GetScale( pitchoffset );
voice->SamplingRate = rate;
voice->RateScale = ( voice->SamplingRate * voice->PitchScale ) >> 16;
handle = GUSWAVE_Play( voice, angle, volume, channels );
return( handle );
}
/*---------------------------------------------------------------------
Function: GUSWAVE_SetReverseStereo
Set the orientation of the left and right channels.
---------------------------------------------------------------------*/
void GUSWAVE_SetReverseStereo
(
int setting
)
{
GUSWAVE_SwapLeftRight = setting;
}
/*---------------------------------------------------------------------
Function: GUSWAVE_GetReverseStereo
Returns the orientation of the left and right channels.
---------------------------------------------------------------------*/
int GUSWAVE_GetReverseStereo
(
void
)
{
return( GUSWAVE_SwapLeftRight );
}
/*---------------------------------------------------------------------
Function: GUSWAVE_InitVoices
Begins playback of digitized sound.
---------------------------------------------------------------------*/
static int GUSWAVE_InitVoices
(
void
)
{
int i;
for( i = 0; i < MAX_VOICES; i++ )
{
VoiceStatus[ i ].playing = FALSE;
VoiceStatus[ i ].Voice = NULL;
}
VoicePool.start = NULL;
VoicePool.end = NULL;
VoiceList.start = NULL;
VoiceList.end = NULL;
for( i = 0; i < VOICES; i++ )
{
GUSWAVE_Voices[ i ].num = -1;
GUSWAVE_Voices[ i ].Active = FALSE;
GUSWAVE_Voices[ i ].GF1voice = -1;
GUSWAVE_Voices[ i ].mem = NULL;
}
for( i = 0; i < VOICES; i++ )
{
GUSWAVE_Voices[ i ].num = i;
GUSWAVE_Voices[ i ].Active = FALSE;
GUSWAVE_Voices[ i ].GF1voice = 0;
GUSWAVE_Voices[ i ].mem = gf1_malloc( GF1BSIZE );
if ( GUSWAVE_Voices[ i ].mem == NULL )
{
GUSWAVE_MaxVoices = i;
if ( i < 1 )
{
if ( GUSMIDI_Installed )
{
GUSWAVE_SetErrorCode( GUSWAVE_UltraNoMemMIDI );
}
else
{
GUSWAVE_SetErrorCode( GUSWAVE_UltraNoMem );
}
return( GUSWAVE_Error );
}
break;
}
LL_AddToTail( VoiceNode, &VoicePool, &GUSWAVE_Voices[ i ] );
}
return( GUSWAVE_Ok );
}
/*---------------------------------------------------------------------
Function: GUSWAVE_SetCallBack
Set the function to call when a voice stops.
---------------------------------------------------------------------*/
void GUSWAVE_SetCallBack
(
void ( *function )( unsigned long )
)
{
GUSWAVE_CallBackFunc = function;
}
/*---------------------------------------------------------------------
Function: GUSWAVE_Init
Initializes the Gravis Ultrasound for digitized sound playback.
---------------------------------------------------------------------*/
int GUSWAVE_Init
(
int numvoices
)
{
int status;
if ( GUSWAVE_Installed )
{
GUSWAVE_Shutdown();
}
GUSWAVE_SetErrorCode( GUSWAVE_Ok );
status = GUS_Init();
if ( status != GUS_Ok )
{
GUSWAVE_SetErrorCode( GUSWAVE_GUSError );
return( GUSWAVE_Error );
}
GUS_Debug = USER_CheckParameter( "DEBUGGUS" );
GUSWAVE_MaxVoices = min( numvoices, VOICES );
GUSWAVE_MaxVoices = max( GUSWAVE_MaxVoices, 0 );
status = GUSWAVE_InitVoices();
if ( status != GUSWAVE_Ok )
{
GUS_Shutdown();
return( status );
}
GUSWAVE_SetReverseStereo( FALSE );
GUSWAVE_CallBackFunc = NULL;
GUSWAVE_Installed = TRUE;
return( GUSWAVE_Ok );
}