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diff --git a/apps/plugins/sdl/progs/duke3d/Game/src/audiolib/_sndscap.h b/apps/plugins/sdl/progs/duke3d/Game/src/audiolib/_sndscap.h
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+/*
+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.
+
+*/
+/**********************************************************************
+ module: _SNDSCAP.H
+
+ author: James R. Dose
+ date: October 26, 1994
+
+ Private header for SNDSCAPE.C
+
+ (c) Copyright 1994 James R. Dose. All Rights Reserved.
+**********************************************************************/
+
+#ifndef ___SNDSCAP_H
+#define ___SNDSCAP_H
+
+#define VALID ( 1 == 1 )
+#define INVALID ( !VALID )
+
+#define TRUE ( 1 == 1 )
+#define FALSE ( !TRUE )
+
+#define lobyte( num ) ( ( int )*( ( char * )&( num ) ) )
+#define hibyte( num ) ( ( int )*( ( ( char * )&( num ) ) + 1 ) )
+
+#define STEREO 1
+#define SIXTEEN_BIT 2
+
+#define MONO_8BIT 0
+#define STEREO_8BIT ( STEREO )
+#define MONO_16BIT ( SIXTEEN_BIT )
+#define STEREO_16BIT ( STEREO | SIXTEEN_BIT )
+
+#define SOUNDSCAPE_MaxMixMode STEREO_16BIT
+
+#define MONO_8BIT_SAMPLE_SIZE 1
+#define MONO_16BIT_SAMPLE_SIZE 2
+#define STEREO_8BIT_SAMPLE_SIZE ( 2 * MONO_8BIT_SAMPLE_SIZE )
+#define STEREO_16BIT_SAMPLE_SIZE ( 2 * MONO_16BIT_SAMPLE_SIZE )
+
+#define SOUNDSCAPE_DefaultSampleRate 11000
+#define SOUNDSCAPE_DefaultMixMode MONO_8BIT
+#define SOUNDSCAPE_MaxIrq 15
+
+/* Ensoniq gate-array chip defines ... */
+#define ODIE 0 /* ODIE gate array */
+#define OPUS 1 /* OPUS gate array */
+#define MMIC 2 /* MiMIC gate array */
+
+/* relevant direct register defines - offsets from base address */
+#define GA_HOSTCSTAT 2 /* host port ctrl/stat reg */
+#define GA_HOSTDATA 3 /* host port data reg */
+#define GA_REGADDR 4 /* indirect address reg */
+#define GA_REGDATA 5 /* indirect data reg */
+#define SB_IACK 0x22e /* SoundBlaster IACK register */
+
+/* relevant indirect register defines */
+#define GA_DMACHB 3 /* DMA chan B assign reg */
+#define GA_INTCFG 4 /* interrupt configuration reg */
+#define GA_DMACFG 5 /* DMA config reg */
+#define GA_CDCFG 6 /* CD-ROM (AD-1848) config reg */
+#define GA_HMCTL 9 /* host master control reg */
+#define GA_CHIPSEL 10 /* programmable external chip select */
+
+/* AD-1848 chip defines ... */
+/* relevant direct register defines */
+#define AD_REGADDR 0 /* indirect address reg */
+#define AD_REGDATA 1 /* indirect data reg */
+#define AD_STATUS 2 /* status register */
+#define AD_OFFSET 8 /* for some boards, a fixed BasePort offset */
+
+/* relevant indirect register defines */
+#define AD_LEFTOUT 6 /* left DAC output control reg */
+#define AD_RIGHTOUT 7 /* right DAC output control reg */
+#define AD_FORMAT 8 /* clock and data format reg */
+#define AD_CONFIG 9 /* interface config register */
+#define AD_PINCTRL 10 /* external pin control reg */
+#define AD_UCOUNT 14 /* upper count reg */
+#define AD_LCOUNT 15 /* lower count reg */
+
+/* some firmware command and communication defines */
+#define SET_CTL 0x88 /* set a control value */
+#define GET_CTL 0x89 /* get a control value */
+#define SET_REV 0xb0 /* set synth reverb */
+#define SYNTH_VOL 0x04 /* Synth Vol control number */
+#define RXRDY 0x01 /* Receive-Ready bit mask */
+#define TXRDY 0x02 /* Transmit-Ready bit mask */
+
+/* some miscellaneous defines ... soundscape reg values, sytem int regs, ... */
+#define INTCONT1 0x20 /* Interrupt Controller 1 control register */
+#define INTCONT2 0xa0 /* Interrupt Controller 2 control register */
+#define INTMASK1 0x21 /* Interrupt Controller 1 mask register */
+#define INTMASK2 0xa1 /* Interrupt Controller 2 mask register */
+#define VECTBASE1 0x08 /* vector base for XT interrupts */
+#define VECTBASE2 0x70 /* vector base for AT extended interrupts */
+#define EOI 0x20 /* End Of Interrupt command */
+#define AUTO_OUT 0x58 /* DMA controller mode */
+
+static void SOUNDSCAPE_EnableInterrupt( void );
+static void SOUNDSCAPE_DisableInterrupt( void );
+static void __interrupt __far SOUNDSCAPE_ServiceInterrupt( void );
+static int ga_read( int rnum );
+static void ga_write( int rnum, int value );
+static int ad_read( int rnum );
+static void ad_write( int rnum, int value );
+static void tdelay( void );
+static void pcm_format( void );
+static int SOUNDSCAPE_SetupDMABuffer( char *BufferPtr, int BufferSize, int mode );
+static int SOUNDSCAPE_BeginPlayback( int length );
+static void SOUNDSCAPE_LockEnd( void );
+static void SOUNDSCAPE_UnlockMemory( void );
+static int SOUNDSCAPE_LockMemory( void );
+static unsigned short allocateTimerStack( unsigned short size );
+static void deallocateTimerStack( unsigned short selector );
+static int parse( char *val, char *str, FILE *p1 );
+static int SOUNDSCAPE_FindCard( void );
+static int SOUNDSCAPE_Setup( void );
+
+#endif