mirror of https://github.com/PCSX2/pcsx2.git
322 lines
9.4 KiB
C
322 lines
9.4 KiB
C
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/***************************************************************************
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sub.c - description
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-------------------
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begin : Sun Nov 16 2003
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copyright : (C) 2003 by Pete Bernert
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email : BlackDove@addcom.de
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***************************************************************************/
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/***************************************************************************
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. See also the license.txt file for *
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* additional informations. *
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* *
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***************************************************************************/
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//*************************************************************************//
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// History of changes:
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//
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// 2003/11/16 - Pete
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// - generic cleanup for the Peops release
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//
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//*************************************************************************//
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/////////////////////////////////////////////////////////
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#include "stdafx.h"
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#define _IN_SUB
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#include "externals.h"
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/* TODO (#1#): SUB CHANNEL STUFF */
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/////////////////////////////////////////////////////////
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unsigned char * pCurrSubBuf=NULL; // ptr to emu sub data (or NULL)
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int iUseSubReading=0; // subdata support (by file or directly)
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char szSUBF[260]; // sub file name
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SUB_CACHE * subCache=NULL; // cache memory
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SUB_DATA * subHead=NULL;
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int iSUBNum=0; // number of subdata cached
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unsigned char SubCData[96]; // global data subc buffer
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unsigned char SubAData[96]; // global audio subc buffer
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/////////////////////////////////////////////////////////
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void BuildSUBCache(void)
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{
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FILE * subfile;
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unsigned char buffer[16], * p;
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SUB_DATA * plast=NULL,* px;
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if(iUseSubReading) // some subreading wanted?
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{
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if(iUseSubReading==1) iUseCaching=0; // -> direct read? no caching done, only 1 sector reads
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memset(SubCData,0,96); // -> init subc
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pCurrSubBuf=SubCData; // -> set global ptr
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}
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else // no plugin subreading?
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{
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pCurrSubBuf=NULL; // -> return NULL as subc buffer to emu
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}
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memset(SubAData,0,96); // init audio subc buffer
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if(iUseSubReading!=2) return; // no subfile wanted?
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if(szSUBF[0]==0) return; // no filename given?
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subfile=fopen(szSUBF, "rb"); // open subfile
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if(subfile==0)
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{
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MessageBox(NULL,"No SBI/M3S file found!",libraryName,MB_OK);
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return;
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}
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memset(buffer,0,5); // read header
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fread(buffer, 4, 1, subfile);
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iSUBNum=0;subHead=NULL;
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if(strcmp((char *)buffer,"SBI")==0) // ah, SBI file
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{
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while(fread(buffer, 4, 1, subfile)==1) // -> read record header
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{
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iSUBNum++; // -> one more sub cache block
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px=(SUB_DATA *)malloc(sizeof(SUB_DATA)); // -> get cache buff
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//!!!!!!!!!!!!!!!!!!!!!!!!!!!! // -> and fill it...
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/* TODO (#1#): addr2time subchannel */
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px->addr=time2addrB(buffer);
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px->pNext=NULL;
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px->subq[0]=0x41;
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px->subq[1]=0x01;
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px->subq[2]=0x01;
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p=&px->subq[3];
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addr2timeB(px->addr,p);
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px->subq[6]=0x00;
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p=&px->subq[7];
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addr2timeB(px->addr+150,p);
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if(buffer[3]==1)
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{
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fread(px->subq,10, 1, subfile);
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}
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else if(buffer[3]==2)
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{
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fread(&px->subq[3],3, 1, subfile);
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}
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else if(buffer[3]==3)
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{
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fread(&px->subq[7],3, 1, subfile);
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}
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if(plast==NULL) // add new cache block to linked list
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{
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plast=subHead=px;
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}
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else
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{
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plast->pNext=px;plast=px;
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}
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}
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}
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else // M3S file?
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{ // -> read data, and store all
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unsigned char min,sec,frame,xmin,xsec,xframe; // -> subs which are different from
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BOOL b1,b2,goon=TRUE;int iNum=0; // -> the expected calculated values
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xmin=2;
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xsec=58;
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xframe=0;
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min=3;
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sec=0;
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frame=0;
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fread(buffer+4, 12, 1, subfile);
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do
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{
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if(itod(min) != buffer[7]||
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itod(sec) != buffer[8]||
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itod(frame) != buffer[9])
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b1=TRUE; else b1=FALSE;
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if(itod(xmin) != buffer[3]||
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itod(xsec) != buffer[4]||
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itod(xframe) != buffer[5])
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b2=TRUE; else b2=FALSE;
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if(buffer[1]!=1) b1=b2=TRUE;
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if(buffer[2]!=1) b1=b2=TRUE;
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if(b1 || b2)
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{
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iSUBNum++;
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px=(SUB_DATA *)malloc(sizeof(SUB_DATA));
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px->pNext=NULL;
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memcpy(px->subq,buffer,10);
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buffer[7]=itod(min);
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buffer[8]=itod(sec);
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buffer[9]=itod(frame);
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//!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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px->addr=time2addrB(&buffer[7]);
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if(plast==NULL)
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{plast=subHead=px;}
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else {plast->pNext=px;plast=px;}
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}
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xframe=xframe+1;
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if(xframe>74)
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{
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xsec+=1;
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xframe-=75;
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if(xsec>59)
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{
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xmin+=1;
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xsec-=60;
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if(xmin>99)
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{
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goon=FALSE;
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}
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}
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}
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frame=frame+1;
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if(frame>74)
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{
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sec+=1;
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frame-=75;
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if(sec>59)
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{
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min+=1;
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sec-=60;
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if(min>99)
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{
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goon=FALSE;
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}
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}
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}
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iNum++;
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if(iNum>(60*75)) goon=FALSE;
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}
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while(goon && (fread(buffer, 16, 1, subfile)==1));
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if(iNum!=(60*75)) goon=FALSE;
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else
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if(iSUBNum==(60*75)) goon=FALSE;
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if(!goon)
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{
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MessageBox(NULL,"Bad SBI/M3S file!",libraryName,MB_OK);
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fclose(subfile);
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FreeSUBCache();
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return;
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}
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}
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subCache=NULL;
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if(iSUBNum) // something in cache?
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{ // -> create an array with the used addresses, for fast searching access
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SUB_CACHE * psc;int i;
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subCache=(SUB_CACHE *)malloc(iSUBNum*sizeof(SUB_CACHE));
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psc=subCache;px=subHead;
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for(i=0;i<iSUBNum;i++,psc++,px=(SUB_DATA *)px->pNext)
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{
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psc->addr = px->addr;
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psc->pNext = (void *)px;
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}
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iSUBNum--;
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}
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fclose(subfile);
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}
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/////////////////////////////////////////////////////////
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// func for calculating 'right' subdata
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void FakeSubData(unsigned long adr)
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{
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SubCData[12]=0x41;
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SubCData[13]=0x01;
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SubCData[14]=0x01;
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/* TODO (#1#): addr2time fake sub data
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*/
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//!!!!!!!!!!!!!!!!!!!!!!!????
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addr2timeB(adr, &SubCData[15]);
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// SubCData[18]=0x00;
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addr2timeB(adr+150,&SubCData[19]);
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}
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/////////////////////////////////////////////////////////
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// check, if for a given addr we have special subdata in cache
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void CheckSUBCache(long addr)
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{
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SUB_CACHE * pcstart, * pcend, * pcpos;
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pcstart=subCache; // ptrs to address arrays (start/end)
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pcend =subCache+iSUBNum;
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if(addr>=pcstart->addr && // easy check, if given addr is between start/end
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addr<=pcend->addr)
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{
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while(1) // now search for sub
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{
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if(addr==pcend->addr) {pcpos=pcend;break;} // got it! break
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pcpos=pcstart+(pcend-pcstart)/2; // get the 'middle' address
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if(pcpos==pcstart) break; // no more checks can be done
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if(addr<pcpos->addr) // look further...
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{
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pcend=pcpos;
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continue;
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}
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if(addr>pcpos->addr)
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{
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pcstart=pcpos;
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continue;
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}
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break;
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}
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if(addr==pcpos->addr) // found some cached data?
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{
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SUB_DATA * p=(SUB_DATA *)pcpos->pNext; // -> ptr to data
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memcpy(&SubCData[12],p->subq,10); // -> get the data
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return; // -> done
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}
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}
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FakeSubData(addr); // no subcdata avail, so fake right one
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}
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/////////////////////////////////////////////////////////
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// free all sub cache bufs
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void FreeSUBCache(void)
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{
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SUB_DATA * p=subHead;
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void * pn;
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while(p)
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{
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pn=p->pNext;
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free(p);
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p=(SUB_DATA *)pn;
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}
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subHead=NULL;
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if(subCache) free(subCache);
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subCache=NULL;
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}
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/////////////////////////////////////////////////////////
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