128 lines
3.1 KiB
C
128 lines
3.1 KiB
C
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/*
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THE COMPUTER CODE CONTAINED HEREIN IS THE SOLE PROPERTY OF PARALLAX
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SOFTWARE CORPORATION ("PARALLAX"). PARALLAX, IN DISTRIBUTING THE CODE TO
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END-USERS, AND SUBJECT TO ALL OF THE TERMS AND CONDITIONS HEREIN, GRANTS A
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ROYALTY-FREE, PERPETUAL LICENSE TO SUCH END-USERS FOR USE BY SUCH END-USERS
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IN USING, DISPLAYING, AND CREATING DERIVATIVE WORKS THEREOF, SO LONG AS
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SUCH USE, DISPLAY OR CREATION IS FOR NON-COMMERCIAL, ROYALTY OR REVENUE
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FREE PURPOSES. IN NO EVENT SHALL THE END-USER USE THE COMPUTER CODE
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CONTAINED HEREIN FOR REVENUE-BEARING PURPOSES. THE END-USER UNDERSTANDS
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AND AGREES TO THE TERMS HEREIN AND ACCEPTS THE SAME BY USE OF THIS FILE.
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COPYRIGHT 1993-1998 PARALLAX SOFTWARE CORPORATION. ALL RIGHTS RESERVED.
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*/
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/*
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* $Source: /cvsroot/dxx-rebirth/d1x-rebirth/main/digicomp.c,v $
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* $Revision: 1.1.1.1 $
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* $Author: zicodxx $
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* $Date: 2006/03/17 19:42:50 $
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*
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* Routines for manipulating digi samples.
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*
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* $Log: digicomp.c,v $
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* Revision 1.1.1.1 2006/03/17 19:42:50 zicodxx
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* initial import
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*
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* Revision 1.1.1.1 1999/06/14 22:06:00 donut
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* Import of d1x 1.37 source.
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*
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* Revision 2.0 1995/02/27 11:33:04 john
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* New version 2.0, which has no anonymous unions, builds with
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* Watcom 10.0, and doesn't require parsing BITMAPS.TBL.
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*
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* Revision 1.2 1994/12/07 18:42:21 john
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* Initial, unused version..
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*
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* Revision 1.1 1994/12/05 09:37:13 john
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* Initial revision
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*
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*
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*/
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#ifdef RCS
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#pragma off (unreferenced)
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static char rcsid[] = "$Id: digicomp.c,v 1.1.1.1 2006/03/17 19:42:50 zicodxx Exp $";
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#pragma on (unreferenced)
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#endif
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#include "soscomp.h"
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#pragma pack (4); // Use 32-bit packing!
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#pragma off (check_stack); // No stack checking!
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#include "sos.h"
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#include "sosm.h"
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ubyte digicomp_initialized = 0;
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#define MAX_DIGI_BLOCKS 32
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ubyte * digicomp_memory[ MAX_DIGI_MEMORY ];
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int N_blocks = 0;
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int Next_block = 0;
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typedef struct digi_block {
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int offset;
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int len;
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int soundno;
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} digi_block;
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digi_block Digi_blocks[MAX_DIGI_BLOCKS];
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void digicomp_init()
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{
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int i;
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if ( digicomp_initialized ) return;
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digicomp_initialized = 1;
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Digi_blocks[0].len = MAX_DIGI_MEMORY;
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Digi_blocks[0].offset = 0;
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Digi_blocks[0].soundno = -1;
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N_blocks = 1;
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for (i=1; i<MAX_DIGI_BLOCKS; i++ ) {
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Digi_blocks[i].len = 0;
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Digi_blocks[i].offset = 0;
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Digi_blocks[i].soundno = -1;
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}
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}
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ubyte * digicomp_get_data(int soundnum)
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{
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int mysize;
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int i;
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if ( !digicomp_initialized ) digicomp_init();
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// See if this sound already exists...
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for (i=0; i<MAX_DIGI_BLOCKS; i++ ) {
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Digi_blocks[i].len = 0;
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Digi_blocks[i].offset = 0;
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if ( Digi_blocks[i].soundno == soundnum ) {
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return &digicomp_memory[Digi_blocks[i].offset];
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}
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}
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// It doesn't exits, so look for the next unused hole that this data can fit into...
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mysize = (Sounds[soundnum].length+1)/2;
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i = Next_block;
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while( ((Digi_blocks[i].soundno >-1) && ( Digi_blocks[i].len < mysize ) ) {
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i++;
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if ( i > MAX_DIGI_BLOCKS )
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i = 0;
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if ( i == Next_block ) {
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// An unused block that this can fit into wasn't found, so find the next one it can fit into
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// and stop it...
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return NULL;
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}
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}
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}
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