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RZX SDK library
This commit is contained in:
fabio.olimpieri
parent
212dfeefbf
commit
265be3cb86
815
src/rzx_lib/rzx.c
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815
src/rzx_lib/rzx.c
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@ -0,0 +1,815 @@
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/*
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R Z X
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Input Recording Library for ZX Spectrum emulators
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=================================================================
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Library version: 0.12 - last updated: 04 August 2002
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Created by Ramsoft ZX Spectrum demogroup
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This is free software. Permission to use it in non-commercial and
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commercial products is hereby granted at the terms of the present
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licence:
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** WORK IN PROGRESS ** (in short: FREE FOR ALL)
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- A link to the official site of the RZX specifications and SDK
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should be provided either in the program executable or into the
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accompanying documentation.
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- The present licence must be not be removed or altered.
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*/
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "rzx.h"
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#ifndef _MSC_VER
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#include <unistd.h>
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#endif
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#ifdef RZX_USE_COMPRESSION
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#include <zlib.h>
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#endif
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/* RZX block IDs */
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#define RZXBLK_CREATOR 0x10
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#define RZXBLK_SESSION 0x11
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#define RZXBLK_COMMENT 0x12
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#define RZXBLK_SECURITY 0x20
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#define RZXBLK_SNAP 0x30
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#define RZXBLK_DATA 0x80
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/* RZX internal status codes */
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#define RZX_INIT 0x0001
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#define RZX_IRB 0x0002
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#define RZX_PROT 0x0004
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#define RZX_PACK 0x0008
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RZX_INFO rzx;
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/* ======================================================================== */
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#define LLO(x) (rzx_u8)(x&0xFF)
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#define LHI(x) (rzx_u8)((x&0xFF00)>>8)
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#define HLO(x) (rzx_u8)((x&0xFF0000)>>16)
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#define HHI(x) (rzx_u8)((x&0xFF000000)>>24)
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#define RZXBLKBUF 512
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#define RZXINPUTMAX 32768
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static int rzx_status=0;
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static FILE *rzxfile=NULL;
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static RZX_CALLBACK emul_handler=0;
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static RZX_EMULINFO host_emul;
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static RZX_EMULINFO file_emul;
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static rzx_u8 *file_emul_data=0;
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static RZX_SNAPINFO rzx_snap;
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static RZX_IRBINFO rzx_irb;
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#ifdef RZX_USE_COMPRESSION
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/* Compression functions and data structures */
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#define ZBUFLEN 16384
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static z_stream zs;
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static rzx_u8 *zbuf=0;
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static int zmode=0;
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static rzx_u32 packed_bytes=0;
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int rzx_pwrite(rzx_u8 *buffer, int len)
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{
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int err;
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zs.avail_in=len;
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zs.next_in=buffer;
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while(zs.avail_in>0)
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{
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if(zs.avail_out==0)
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{
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zs.next_out=zbuf;
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err=fwrite(zbuf,1,ZBUFLEN,rzxfile);
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packed_bytes+=err;
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zs.avail_out=ZBUFLEN;
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}
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err=deflate(&zs,Z_NO_FLUSH);
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}
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return len-zs.avail_in;
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}
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int rzx_pread(rzx_u8 *buffer, int len)
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{
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zs.next_out=buffer;
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zs.avail_out=len;
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while(zs.avail_out>0)
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{
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if(zs.avail_in==0)
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{
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zs.avail_in=fread(zbuf,1,ZBUFLEN,rzxfile);
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if(zs.avail_in==0) return 0;
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zs.next_in=zbuf;
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}
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inflate(&zs,Z_NO_FLUSH);
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}
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return len-zs.avail_out;
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}
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int rzx_pclose()
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{
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int len, done=0,err;
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zs.avail_in=0;
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while(!zmode)
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{
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len=ZBUFLEN-zs.avail_out;
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if(len>0)
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{
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err=fwrite(zbuf,1,len,rzxfile);
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packed_bytes+=err;
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zs.next_out=zbuf;
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zs.avail_out=ZBUFLEN;
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}
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if(done) break;
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err=deflate(&zs,Z_FINISH);
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done=(zs.avail_out>0 || err==Z_STREAM_END);
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}
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if(zbuf!=0) {free(zbuf); zbuf=0;}
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return 0;
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}
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int rzx_popen(long offset, char *mode)
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{
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int err;
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zmode=((mode[0]|0x20)=='r')?1:0;
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memset(&zs,0,sizeof(zs));
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zbuf=(rzx_u8*)malloc(ZBUFLEN);
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if(zmode)
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{
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zs.next_in=zbuf;
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err=inflateInit2(&zs,15);
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}
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else
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{
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err=deflateInit2(&zs,9,Z_DEFLATED,15,9,Z_DEFAULT_STRATEGY);
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zs.next_out=zbuf;
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}
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zs.avail_out=ZBUFLEN;
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packed_bytes=0;
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if(err!=Z_OK) return -1;
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fseek(rzxfile,offset,SEEK_SET);
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return 0;
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}
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#endif
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typedef struct
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{
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rzx_u8 type;
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rzx_u32 length;
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long start;
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rzx_u8 buff[RZXBLKBUF];
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} RZX_BLKHDR;
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static RZX_BLKHDR block;
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static rzx_u32 rzx_framecount=0;
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#ifdef RZX_DEBUG
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rzx_u16 INmax=0;
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rzx_u16 INcount=0;
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rzx_u8 *inputbuffer=NULL;
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#else
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static rzx_u16 INmax=0;
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static rzx_u16 INcount=0;
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static rzx_u8 *inputbuffer=NULL;
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#endif
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static rzx_u16 INold=0;
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static rzx_u8 *oldbuffer=NULL;
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int rzx_scan()
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{
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long fpos=10;
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memset(&file_emul,0,sizeof(RZX_EMULINFO));
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do
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{
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fseek(rzxfile,fpos,SEEK_SET);
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if(fread(block.buff,5,1,rzxfile)<1) break;
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block.type=block.buff[0];
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block.length=block.buff[1]+256*block.buff[2]+65536*block.buff[3]+16777216*block.buff[4];
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/* printf("rzx_scan: block %02X len=%05i\n",block.type,block.length); */
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if(block.length==0) return RZX_INVALID;
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switch(block.type)
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{
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case RZXBLK_CREATOR:
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/* read the info about the emulator which created this RZX */
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fread(block.buff,24,1,rzxfile);
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strncpy(file_emul.name,block.buff,19);
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file_emul.ver_major=block.buff[20]+256*block.buff[21];
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file_emul.ver_minor=block.buff[22]+256*block.buff[23];
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/* check for custom data */
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file_emul.length=block.length-29;
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if(file_emul.length>0)
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{
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if(file_emul.data!=0) free(file_emul.data);
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file_emul.data=(rzx_u8*)malloc(file_emul.length);
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fread(file_emul.data,file_emul.length,1,rzxfile);
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}
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else file_emul.data=0;
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break;
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case RZXBLK_SECURITY:
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/* signal that the RZX contains at least one encrypted block */
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rzx.options|=RZX_PROTECTED;
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rzx.options|=RZX_SEALED;
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break;
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case RZXBLK_DATA:
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fread(block.buff,13,1,rzxfile);
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default:
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break;
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}
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fpos+=block.length;
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} while(1);
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//if(strlen(file_emul.name)>0)
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fseek(rzxfile,10,SEEK_SET);
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block.start=10;
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block.length=0;
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block.type=0;
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return emul_handler(RZXMSG_CREATOR,&file_emul);
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}
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void rzx_close_irb()
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{
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long pos,len;
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#ifdef RZX_USE_COMPRESSION
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rzx_pclose();
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#endif
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/* suppress empty IRBs */
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if(!rzx_framecount)
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{
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fseek(rzxfile,block.start,SEEK_SET);
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rzx_status&=~RZX_IRB;
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return;
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}
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/* update the IRB header */
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pos=ftell(rzxfile);
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len=pos-block.start;
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block.buff[0]=LLO(len);
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block.buff[1]=LHI(len);
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block.buff[2]=HLO(len);
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block.buff[3]=HHI(len);
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block.buff[4]=LLO(rzx_framecount);
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block.buff[5]=LHI(rzx_framecount);
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block.buff[6]=HLO(rzx_framecount);
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block.buff[7]=HHI(rzx_framecount);
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fseek(rzxfile,block.start+1,SEEK_SET);
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fwrite(block.buff,8,1,rzxfile);
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fseek(rzxfile,pos,SEEK_SET);
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block.start=pos;
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/* signal that we have exited the IRB */
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rzx_status&=~RZX_IRB;
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}
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int rzx_seek_irb()
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{
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int done=0;
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long fpos;
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FILE *snapfile;
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while(!done)
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{
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if(fread(block.buff,5,1,rzxfile)<1) return RZX_FINISHED;
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block.type=block.buff[0];
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#ifndef RZX_BIG_ENDIAN
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block.length=*((rzx_u32*)(&block.buff[1]));
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#else
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block.length=block.buff[1]+256*block.buff[2]+65536*block.buff[3]+16777216*block.buff[4];
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#endif
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if(block.length==0) return RZX_INVALID;
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switch(block.type)
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{
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case RZXBLK_SNAP:
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fread(block.buff,12,1,rzxfile);
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strcpy(rzx_snap.filename,"");
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rzx_snap.options=0x00;
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if(!(block.buff[0]&0x01))
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{
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/* embedded snap */
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#ifdef RZX_USE_COMPRESSION
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if(block.buff[0]&0x02) rzx_snap.options|=RZX_COMPRESSED;
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fpos=ftell(rzxfile);
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rzx_popen(fpos,"rb");
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#endif
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strcpy(rzx_snap.filename,"rzxtemp.");
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strcat(rzx_snap.filename,&block.buff[4]);
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#ifndef RZX_BIG_ENDIAN
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rzx_snap.length=*((rzx_u32*)&block.buff[8]);
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#else
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rzx_snap.length=block.buff[8]+256*block.buff[9]+65536*block.buff[10]+16777216*block.buff[11];
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#endif
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/* extract to tempfile */
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snapfile=fopen(rzx_snap.filename,"wb");
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/* if you can't, skip to next block */
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if(snapfile==NULL) break;
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/* ok */
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rzx_snap.options|=RZX_EXTERNAL|RZX_REMOVE;
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fpos=rzx_snap.length;
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while(fpos>0)
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{
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done=(fpos>RZXBLKBUF)?RZXBLKBUF:fpos;
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#ifdef RZX_USE_COMPRESSION
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if(rzx_snap.options&RZX_COMPRESSED) rzx_pread(block.buff,done);
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else fread(block.buff,done,1,rzxfile);
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#else
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fread(block.buff,done,1,rzxfile);
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#endif
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fwrite(block.buff,done,1,snapfile);
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fpos-=done;
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}
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#ifdef RZX_USE_COMPRESSION
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rzx_pclose();
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#endif
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fclose(snapfile);
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done=0;
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}
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else
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{
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/* external snap, read descriptor */
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fread(&block.buff[12],block.length-17,1,rzxfile);
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strcpy(rzx_snap.filename,&block.buff[16]);
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rzx_snap.options|=RZX_EXTERNAL;
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}
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/* tell the host emulator to load the snapshot */
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emul_handler(RZXMSG_LOADSNAP,&rzx_snap);
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if(rzx_snap.options&RZX_REMOVE) remove(rzx_snap.filename);
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break;
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case RZXBLK_DATA:
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/* recording block found, initialize the values */
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fread(block.buff,13,1,rzxfile);
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#ifndef RZX_BIG_ENDIAN
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rzx_framecount=*((rzx_u32*)&block.buff[0]);
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#else
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rzx_framecount=block.buff[0]+256*block.buff[1]+65536*block.buff[2]+16777216*block.buff[3];
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#endif
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rzx_status|=RZX_IRB;
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if(block.buff[9]&0x01) rzx_status|=RZX_PROT;
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else rzx_status&=~RZX_PROT;
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if(block.buff[9]&0x02) rzx_status|=RZX_PACK;
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else rzx_status&=~RZX_PACK;
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#ifndef RZX_USE_COMPRESSION
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if(rzx_status&RZX_PACK) return RZX_UNSUPPORTED;
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#endif
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rzx_irb.framecount=rzx_framecount;
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rzx_irb.options=0;
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if(rzx_status&RZX_PROT) rzx_irb.options|=RZX_PROTECTED;
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if(rzx_status&RZX_PACK) rzx_irb.options|=RZX_COMPRESSED;
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/* notify the emulator the new parameters */
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emul_handler(RZXMSG_IRBNOTIFY,&rzx_irb);
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#ifdef RZX_USE_COMPRESSION
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if(rzx_status&RZX_PACK)
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{
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fpos=ftell(rzxfile);
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rzx_popen(fpos,"rb");
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}
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#endif
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/* all done */
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return RZX_OK;
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break;
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case RZXBLK_SECURITY:
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/* set the new security parameters */
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break;
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default:
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break;
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}
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/* seek the next block in the file */
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block.start+=block.length;
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fseek(rzxfile,block.start,SEEK_SET);
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}
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return RZX_OK;
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}
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/* ======================================================================== */
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int rzx_init(const RZX_EMULINFO *emul, const RZX_CALLBACK callback)
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{
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if((emul==0)||(callback==0)) return RZX_INVALID;
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/* register the host emulator */
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host_emul=(*emul);
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emul_handler=callback;
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rzx.mode=RZX_IDLE;
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rzx.options=0;
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memset(&file_emul,0,sizeof(RZX_EMULINFO));
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rzx_status=RZX_INIT;
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return RZX_OK;
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}
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int rzx_playback(const char *filename)
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{
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if(filename==0) return RZX_INVALID;
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if(inputbuffer==NULL)
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{
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inputbuffer=(rzx_u8*)malloc(RZXINPUTMAX);
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if(inputbuffer==NULL) return RZX_NOMEMORY;
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memset(inputbuffer,0,RZXINPUTMAX);
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}
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if(oldbuffer==NULL)
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{
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oldbuffer=(rzx_u8*)malloc(RZXINPUTMAX);
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if(oldbuffer==NULL) return RZX_NOMEMORY;
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memset(oldbuffer,0,RZXINPUTMAX);
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}
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memset(block.buff,0,RZXBLKBUF);
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rzx.mode=RZX_IDLE;
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rzx_status&=~RZX_IRB;
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rzxfile=fopen(filename,"rb");
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if(rzxfile==NULL) return RZX_NOTFOUND;
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memset(&block,0,16);
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fread(block.buff,6,1,rzxfile);
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if(memcmp(block.buff,"RZX!",4))
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{
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/* not an RZX file */
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rzx_close();
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return RZX_INVALID;
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}
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/* save info about the RZX */
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strcpy(rzx.filename, filename);
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rzx.ver_major=block.buff[4];
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rzx.ver_minor=block.buff[5];
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/* pre-scan the file to collect useful information and stats */
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if(rzx_scan()!=RZX_OK)
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{
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rzx_close();
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return RZX_INVALID;
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}
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/* ok, open the first IRB */
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rzx.mode=RZX_PLAYBACK;
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if(rzx_seek_irb()!=RZX_OK)
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{
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rzx_close();
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return RZX_FINISHED;
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}
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INcount=0;
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INold=0xFFFF;
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return RZX_OK;
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}
|
||||
|
||||
|
||||
int rzx_record(const char *filename)
|
||||
{
|
||||
if(filename==0) return RZX_INVALID;
|
||||
if(inputbuffer==NULL)
|
||||
{
|
||||
inputbuffer=(rzx_u8*)malloc(RZXINPUTMAX);
|
||||
if(inputbuffer==NULL) return RZX_NOMEMORY;
|
||||
memset(inputbuffer,0,RZXINPUTMAX);
|
||||
}
|
||||
if(oldbuffer==NULL)
|
||||
{
|
||||
oldbuffer=(rzx_u8*)malloc(RZXINPUTMAX);
|
||||
if(oldbuffer==NULL) return RZX_NOMEMORY;
|
||||
memset(oldbuffer,0,RZXINPUTMAX);
|
||||
}
|
||||
memset(block.buff,0,RZXBLKBUF);
|
||||
rzx.mode=RZX_IDLE;
|
||||
rzxfile=fopen(filename,"wb");
|
||||
if(rzxfile==NULL)
|
||||
{
|
||||
rzx_close();
|
||||
return RZX_NOTFOUND;
|
||||
}
|
||||
strcpy(rzx.filename,filename);
|
||||
/* write the main RZX header */
|
||||
memcpy(block.buff,"RZX!",4);
|
||||
block.buff[4]=LHI(RZX_LIBRARY_VERSION);
|
||||
block.buff[5]=LLO(RZX_LIBRARY_VERSION);
|
||||
/* add the Creator Information Block */
|
||||
block.buff[10]=RZXBLK_CREATOR;
|
||||
block.length=29+host_emul.length;
|
||||
block.buff[11]=LLO(block.length);
|
||||
block.buff[12]=LHI(block.length);
|
||||
block.buff[13]=HLO(block.length);
|
||||
block.buff[14]=HHI(block.length);
|
||||
memcpy(&block.buff[15],&host_emul,24);
|
||||
#ifdef RZX_BIG_ENDIAN
|
||||
block.buff[25]=LLO(host_emul.ver_major);
|
||||
block.buff[26]=LHI(host_emul.ver_major);
|
||||
block.buff[27]=LLO(host_emul.ver_minor);
|
||||
block.buff[28]=LHI(host_emul.ver_minor);
|
||||
#endif
|
||||
fwrite(block.buff,10+block.length,1,rzxfile);
|
||||
if(host_emul.length>0) fwrite(host_emul.data,host_emul.length,1,rzxfile);
|
||||
block.start=10;
|
||||
rzx.mode=RZX_RECORD;
|
||||
rzx_status&=~RZX_IRB;
|
||||
INcount=0;
|
||||
INold=0xFFFF;
|
||||
return RZX_OK;
|
||||
}
|
||||
|
||||
|
||||
void rzx_close(void)
|
||||
{
|
||||
switch(rzx.mode)
|
||||
{
|
||||
case RZX_PLAYBACK:
|
||||
rzx_pclose();
|
||||
break;
|
||||
case RZX_RECORD:
|
||||
/* is there an IRB to close? */
|
||||
if(rzx_status&RZX_IRB) rzx_close_irb();
|
||||
break;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
if(rzxfile!=NULL)
|
||||
{
|
||||
fclose(rzxfile);
|
||||
rzxfile=NULL;
|
||||
}
|
||||
rzx.mode=RZX_IDLE;
|
||||
rzx_status=RZX_INIT;
|
||||
if(file_emul_data!=0)
|
||||
{
|
||||
free(file_emul_data);
|
||||
file_emul_data=0;
|
||||
}
|
||||
if(inputbuffer!=NULL)
|
||||
{
|
||||
free(inputbuffer);
|
||||
inputbuffer=NULL;
|
||||
}
|
||||
if(oldbuffer!=NULL)
|
||||
{
|
||||
free(oldbuffer);
|
||||
oldbuffer=NULL;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
int rzx_update(rzx_u16 *icount)
|
||||
{
|
||||
rzx_u8 *xchgp;
|
||||
long fpos;
|
||||
switch(rzx.mode)
|
||||
{
|
||||
case RZX_PLAYBACK:
|
||||
/* check if we are at the beginning */
|
||||
if((rzx_status&RZX_IRB)&&(!rzx_framecount)) rzx_status&=~RZX_IRB;
|
||||
/* need to seek another IRB? */
|
||||
if(!(rzx_status&RZX_IRB))
|
||||
{
|
||||
if(rzx_seek_irb()!=RZX_OK)
|
||||
{
|
||||
/* no more IRBs, finished */
|
||||
rzx_close();
|
||||
return RZX_FINISHED;
|
||||
}
|
||||
}
|
||||
|
||||
/* fetch the instruction and IN counters */
|
||||
INold=INmax;
|
||||
#ifdef RZX_USE_COMPRESSION
|
||||
if(rzx_status&RZX_PACK) rzx_pread(block.buff,4);
|
||||
else fread(block.buff,4,1,rzxfile);
|
||||
#else
|
||||
fread(block.buff,4,1,rzxfile);
|
||||
#endif
|
||||
#ifndef RZX_BIG_ENDIAN
|
||||
(*icount)=((rzx_u16*)&block.buff)[0];
|
||||
INmax=((rzx_u16*)&block.buff)[1];
|
||||
#else
|
||||
(*icount)=block.buff[0]+256*block.buff[1];
|
||||
INmax=block.buff[2]+256*block.buff[3];
|
||||
#endif
|
||||
|
||||
/* update the input array */
|
||||
#ifdef RZX_USE_COMPRESSION
|
||||
if(INmax&&(INmax!=0xFFFF))
|
||||
{
|
||||
if(rzx_status&RZX_PACK) rzx_pread(inputbuffer,INmax);
|
||||
else fread(inputbuffer,INmax,1,rzxfile);
|
||||
}
|
||||
else INmax=INold;
|
||||
#else
|
||||
if(INmax&&(INmax!=0xFFFF)) fread(inputbuffer,INmax,1,rzxfile);
|
||||
else INmax=INold;
|
||||
#endif
|
||||
INcount=0;
|
||||
rzx_framecount--;
|
||||
break;
|
||||
case RZX_RECORD:
|
||||
/* close if parameters are not valid */
|
||||
if((!icount)&&(rzx_status&RZX_IRB))
|
||||
{
|
||||
rzx_close_irb();
|
||||
break;
|
||||
}
|
||||
/* need to start a new IRB? */
|
||||
if(!(rzx_status&RZX_IRB))
|
||||
{
|
||||
/* ask the emulator about the params */
|
||||
memset(&rzx_irb,0,sizeof(RZX_IRBINFO));
|
||||
emul_handler(RZXMSG_IRBNOTIFY,&rzx_irb);
|
||||
/* fill in the IRB header */
|
||||
block.start=ftell(rzxfile);
|
||||
memset(block.buff,0,18);
|
||||
block.buff[0]=RZXBLK_DATA;
|
||||
rzx_status&=~RZX_PACK;
|
||||
#ifdef RZX_USE_COMPRESSION
|
||||
if(rzx_irb.options&RZX_COMPRESSED)
|
||||
{
|
||||
block.buff[14]|=0x02;
|
||||
rzx_status|=RZX_PACK;
|
||||
}
|
||||
#endif
|
||||
#ifndef RZX_BIG_ENDIAN
|
||||
*((rzx_u32*)&block.buff[10])=rzx_irb.tstates;
|
||||
#else
|
||||
block.buff[10]=LLO(rzx_irb.tstates);
|
||||
block.buff[11]=LHI(rzx_irb.tstates);
|
||||
block.buff[12]=HLO(rzx_irb.tstates);
|
||||
block.buff[13]=HHI(rzx_irb.tstates);
|
||||
#endif
|
||||
fwrite(block.buff,18,1,rzxfile);
|
||||
rzx_status|=RZX_IRB;
|
||||
rzx_framecount=0;
|
||||
#ifdef RZX_USE_COMPRESSION
|
||||
if(rzx_status&RZX_PACK)
|
||||
{
|
||||
fpos=ftell(rzxfile);
|
||||
rzx_popen(fpos,"wb");
|
||||
}
|
||||
#endif
|
||||
}
|
||||
|
||||
/* prepare the frame data */
|
||||
if(INold==INcount)
|
||||
if(!memcmp(inputbuffer,oldbuffer,INcount)) INcount=0xFFFF;
|
||||
|
||||
#ifndef RZX_BIG_ENDIAN
|
||||
((rzx_u16*)&block.buff)[0]=(*icount);
|
||||
((rzx_u16*)&block.buff)[1]=INcount;
|
||||
#else
|
||||
block.buff[0]=LLO(*icount);
|
||||
block.buff[1]=LHI(*icount);
|
||||
block.buff[2]=LLO(INcount);
|
||||
block.buff[3]=LHI(INcount);
|
||||
#endif
|
||||
#ifdef RZX_USE_COMPRESSION
|
||||
if(rzx_status&RZX_PACK) rzx_pwrite(block.buff,4);
|
||||
else fwrite(block.buff,4,1,rzxfile);
|
||||
if(INcount&&(INcount!=0xFFFF))
|
||||
{
|
||||
if(rzx_status&RZX_PACK) rzx_pwrite(inputbuffer,INcount);
|
||||
else fwrite(inputbuffer,INcount,1,rzxfile);
|
||||
xchgp=inputbuffer;
|
||||
inputbuffer=oldbuffer;
|
||||
oldbuffer=xchgp;
|
||||
INold=INcount;
|
||||
}
|
||||
#else
|
||||
fwrite(block.buff,4,1,rzxfile);
|
||||
if(INcount&&(INcount!=0xFFFF))
|
||||
{
|
||||
fwrite(inputbuffer,INcount,1,rzxfile);
|
||||
xchgp=inputbuffer;
|
||||
inputbuffer=oldbuffer;
|
||||
oldbuffer=xchgp;
|
||||
INold=INcount;
|
||||
}
|
||||
#endif
|
||||
INcount=0;
|
||||
rzx_framecount++;
|
||||
break;
|
||||
default:
|
||||
return RZX_INVALID;
|
||||
break;
|
||||
}
|
||||
return RZX_OK;
|
||||
}
|
||||
|
||||
void rzx_store_input(rzx_u8 value)
|
||||
{
|
||||
if(INcount<RZXINPUTMAX) inputbuffer[INcount++]=value;
|
||||
}
|
||||
|
||||
|
||||
rzx_u8 rzx_get_input(void)
|
||||
{
|
||||
if(INcount>=INmax) return RZX_SYNCLOST;
|
||||
return inputbuffer[INcount++];
|
||||
}
|
||||
|
||||
int rzx_add_snapshot(const char *filename, const rzx_u32 flags)
|
||||
{
|
||||
FILE *snapfile;
|
||||
long snaplen;
|
||||
long fpos=0;
|
||||
int blocklen=17,i;
|
||||
if(filename==0) return RZX_INVALID;
|
||||
snapfile=fopen(filename,"rb");
|
||||
if(snapfile==NULL) return RZX_NOTFOUND;
|
||||
if(rzx_status&RZX_IRB) rzx_close_irb();
|
||||
/* find the length of the snapshot file */
|
||||
fseek(snapfile,0,SEEK_END);
|
||||
snaplen=ftell(snapfile);
|
||||
fseek(snapfile,0,SEEK_SET);
|
||||
memset(block.buff,0,RZXBLKBUF);
|
||||
/* fill in the structures */
|
||||
block.buff[0]=RZXBLK_SNAP;
|
||||
if(flags&RZX_EXTERNAL)
|
||||
{
|
||||
/* leave the snapshot outside the RZX file */
|
||||
blocklen+=4+strlen(filename)+1;
|
||||
block.buff[5]=0x01;
|
||||
}
|
||||
else blocklen+=snaplen;
|
||||
block.buff[1]=LLO(blocklen);
|
||||
block.buff[2]=LHI(blocklen);
|
||||
block.buff[3]=HLO(blocklen);
|
||||
block.buff[4]=HHI(blocklen);
|
||||
/* find the filename extension and store it into the header */
|
||||
i=0; while((i<strlen(filename))&&(filename[i]!='.')) i++;
|
||||
i++; if(i<strlen(filename)) strncpy(&block.buff[9],&filename[i],3);
|
||||
block.buff[13]=LLO(snaplen);
|
||||
block.buff[14]=LHI(snaplen);
|
||||
block.buff[15]=HLO(snaplen);
|
||||
block.buff[16]=HHI(snaplen);
|
||||
/* write the snapshot or the descriptor */
|
||||
if(flags&RZX_EXTERNAL)
|
||||
{
|
||||
/* fill in the external descriptor */
|
||||
strcpy(&block.buff[21],filename);
|
||||
fwrite(block.buff,blocklen,1,rzxfile);
|
||||
}
|
||||
else
|
||||
{
|
||||
/* embedded snapshot */
|
||||
#ifdef RZX_USE_COMPRESSION
|
||||
if(flags&RZX_COMPRESSED) block.buff[5]|=0x02;
|
||||
#endif
|
||||
fwrite(block.buff,17,1,rzxfile);
|
||||
#ifdef RZX_USE_COMPRESSION
|
||||
if(flags&RZX_COMPRESSED)
|
||||
{
|
||||
fpos=ftell(rzxfile);
|
||||
rzx_popen(fpos,"wb");
|
||||
}
|
||||
#endif
|
||||
/* copy the snapshot */
|
||||
while(snaplen>0)
|
||||
{
|
||||
i=(snaplen>RZXBLKBUF)?RZXBLKBUF:snaplen;
|
||||
fread(block.buff,i,1,snapfile);
|
||||
#ifdef RZX_USE_COMPRESSION
|
||||
if(flags&RZX_COMPRESSED) rzx_pwrite(block.buff,i);
|
||||
else fwrite(block.buff,i,1,rzxfile);
|
||||
#else
|
||||
fwrite(block.buff,i,1,rzxfile);
|
||||
#endif
|
||||
snaplen-=i;
|
||||
}
|
||||
#ifdef RZX_USE_COMPRESSION
|
||||
if(flags&RZX_COMPRESSED)
|
||||
{
|
||||
rzx_pclose();
|
||||
i=ftell(rzxfile);
|
||||
blocklen=17+i-fpos;
|
||||
fseek(rzxfile,fpos-16,SEEK_SET);
|
||||
block.buff[1]=LLO(blocklen);
|
||||
block.buff[2]=LHI(blocklen);
|
||||
block.buff[3]=HLO(blocklen);
|
||||
block.buff[4]=HHI(blocklen);
|
||||
fwrite(&block.buff[1],4,1,rzxfile);
|
||||
fseek(rzxfile,i,SEEK_SET);
|
||||
}
|
||||
#endif
|
||||
}
|
||||
fclose(snapfile); snapfile=NULL;
|
||||
/* remove the snapshot if requested */
|
||||
if(flags&RZX_REMOVE) remove(filename);
|
||||
return RZX_OK;
|
||||
}
|
||||
|
||||
|
||||
int rzx_add_comment(const char *text, const rzx_u32 flags)
|
||||
{
|
||||
if(rzx_status&RZX_IRB) rzx_close_irb();
|
||||
/* to do! */
|
||||
return RZX_OK;
|
||||
}
|
||||
|
||||
|
||||
#ifdef __cplusplus
|
||||
}
|
||||
#endif
|
||||
|
||||
135
src/rzx_lib/rzx.h
Normal file
135
src/rzx_lib/rzx.h
Normal file
@ -0,0 +1,135 @@
|
||||
/*
|
||||
R Z X
|
||||
|
||||
Input Recording Library for ZX Spectrum emulators
|
||||
=================================================================
|
||||
Library version: 0.12 - last updated: 4 August 2002
|
||||
|
||||
<license goes here>
|
||||
*/
|
||||
|
||||
|
||||
#ifndef RZX_LIBRARY_INCLUDE
|
||||
#define RZX_LIBRARY_INCLUDE
|
||||
#ifdef __cplusplus
|
||||
extern "C" {
|
||||
#endif
|
||||
|
||||
|
||||
#define RZX_LIBRARY_VERSION 0x000C
|
||||
#define RZX_LIBRARY_BUILD 31
|
||||
|
||||
|
||||
/* ******************** Configuration options ******************** */
|
||||
|
||||
/* If needed, please edit the data types definitions as requested */
|
||||
typedef unsigned char rzx_u8; /* must be unsigned 8-bit */
|
||||
typedef unsigned short int rzx_u16; /* must be unsigned 16-bit */
|
||||
typedef unsigned long int rzx_u32; /* must be unsigned 32-bit */
|
||||
|
||||
/* Uncomment the next line for Motorola-byte-order CPUs */
|
||||
#define RZX_BIG_ENDIAN
|
||||
|
||||
/* Uncomment the next line to enable compression support */
|
||||
#define RZX_USE_COMPRESSION
|
||||
|
||||
/* Uncomment this to enable some exports for debugging */
|
||||
//#define RZX_DEBUG
|
||||
|
||||
/* *************************************************************** */
|
||||
|
||||
|
||||
/* RZX error codes */
|
||||
#define RZX_OK 0
|
||||
#define RZX_NOTFOUND -1
|
||||
#define RZX_INVALID -2
|
||||
#define RZX_FINISHED -3
|
||||
#define RZX_UNSUPPORTED -4
|
||||
#define RZX_NOMEMORY -5
|
||||
#define RZX_SYNCLOST -6
|
||||
|
||||
/* RZX operation mode */
|
||||
#define RZX_IDLE 0
|
||||
#define RZX_PLAYBACK 1
|
||||
#define RZX_RECORD 2
|
||||
|
||||
|
||||
/* RZX callback messages */
|
||||
#define RZXMSG_CREATOR 1
|
||||
#define RZXMSG_LOADSNAP 2
|
||||
#define RZXMSG_IRBNOTIFY 3
|
||||
|
||||
|
||||
/* RZX global flags */
|
||||
#define RZX_PROTECTED 0x0001
|
||||
#define RZX_SEALED 0x0002
|
||||
#define RZX_REMOVE 0x0004
|
||||
#define RZX_EXTERNAL 0x0008
|
||||
#define RZX_COMPRESSED 0x0010
|
||||
|
||||
|
||||
/* RZX data types */
|
||||
typedef rzx_u32 (*RZX_CALLBACK)(int msg, void *param);
|
||||
|
||||
typedef struct
|
||||
{
|
||||
int mode;
|
||||
char filename[260];
|
||||
rzx_u8 ver_major;
|
||||
rzx_u8 ver_minor;
|
||||
rzx_u32 options;
|
||||
} RZX_INFO;
|
||||
|
||||
typedef struct
|
||||
{
|
||||
char name[20];
|
||||
rzx_u16 ver_major;
|
||||
rzx_u16 ver_minor;
|
||||
rzx_u8 *data;
|
||||
rzx_u32 length;
|
||||
rzx_u32 options;
|
||||
} RZX_EMULINFO;
|
||||
|
||||
typedef struct
|
||||
{
|
||||
char filename[260];
|
||||
rzx_u32 length;
|
||||
rzx_u32 options;
|
||||
} RZX_SNAPINFO;
|
||||
|
||||
typedef struct
|
||||
{
|
||||
rzx_u32 framecount;
|
||||
rzx_u32 tstates;
|
||||
rzx_u32 options;
|
||||
} RZX_IRBINFO;
|
||||
|
||||
|
||||
/* RZX public data structures */
|
||||
extern RZX_INFO rzx;
|
||||
|
||||
|
||||
/* RZX functions API */
|
||||
int rzx_init(const RZX_EMULINFO *emul, const RZX_CALLBACK callback);
|
||||
int rzx_record(const char *filename);
|
||||
int rzx_playback(const char *filename);
|
||||
void rzx_close(void);
|
||||
int rzx_update(rzx_u16 *icount);
|
||||
void rzx_store_input(rzx_u8 value);
|
||||
rzx_u8 rzx_get_input(void);
|
||||
|
||||
int rzx_add_snapshot(const char *filename, const rzx_u32 flags);
|
||||
int rzx_add_comment(const char *text, const rzx_u32 flags);
|
||||
|
||||
|
||||
#ifdef RZX_DEBUG
|
||||
extern rzx_u16 INcount;
|
||||
extern rzx_u16 INmax;
|
||||
extern rzx_u8 *inputbuffer;
|
||||
#endif
|
||||
|
||||
|
||||
#ifdef __cplusplus
|
||||
}
|
||||
#endif
|
||||
#endif
|
||||
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Reference in New Issue
Block a user