420 lines
8.7 KiB
C
420 lines
8.7 KiB
C
#include <stdio.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <string.h>
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#include <strings.h>
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#include <unistd.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <errno.h>
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#define UPKG_MAGIC 0x9E2A83C1
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// uncomment if you want full data dumps, helpful if you need to reverse engineer some unsupported format
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//#define _DEBUG 1
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typedef struct
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{
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uint32_t magic;
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uint16_t pkgver, license;
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uint32_t flags, nnames, onames, nexports, oexports, nimports, oimports;
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} upkg_header_t;
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uint8_t *pkgfile;
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upkg_header_t *head;
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size_t fpos = 0;
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uint8_t readbyte( void )
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{
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uint8_t val = pkgfile[fpos];
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fpos++;
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return val;
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}
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uint16_t readword( void )
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{
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uint16_t val = *(uint16_t*)(pkgfile+fpos);
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fpos += 2;
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return val;
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}
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uint32_t readdword( void )
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{
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uint32_t val = *(uint32_t*)(pkgfile+fpos);
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fpos += 4;
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return val;
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}
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float readfloat( void )
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{
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float val = *(float*)(pkgfile+fpos);
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fpos += 4;
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return val;
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}
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#define READSTRUCT(x,y) {memcpy(&x,pkgfile+fpos,sizeof(y));fpos+=sizeof(y);}
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// reads a compact index value
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int32_t readindex( void )
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{
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uint8_t byte[5] = {0};
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byte[0] = readbyte();
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if ( !byte[0] ) return 0;
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if ( byte[0]&0x40 )
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{
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for ( int i=1; i<5; i++ )
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{
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byte[i] = readbyte();
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if ( !(byte[i]&0x80) ) break;
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}
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}
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int32_t tf = byte[0]&0x3f;
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tf |= (int32_t)(byte[1]&0x7f)<<6;
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tf |= (int32_t)(byte[2]&0x7f)<<13;
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tf |= (int32_t)(byte[3]&0x7f)<<20;
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tf |= (int32_t)(byte[4]&0x7f)<<27;
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if ( byte[0]&0x80 ) tf *= -1;
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return tf;
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}
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// reads a name table entry
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size_t readname( int *olen )
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{
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size_t pos = fpos;
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if ( head->pkgver >= 64 )
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{
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int32_t len = readindex();
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pos = fpos;
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if ( olen ) *olen = len;
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if ( len <= 0 ) return pos;
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fpos += len;
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}
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else
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{
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int c, p = 0;
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while ( (c = readbyte()) ) p++;
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if ( olen ) *olen = p;
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}
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fpos += 4;
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return pos;
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}
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size_t getname( int index, int *olen )
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{
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size_t prev = fpos;
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fpos = head->onames;
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size_t npos = 0;
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for ( int i=0; i<=index; i++ )
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npos = readname(olen);
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fpos = prev;
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return npos;
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}
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// checks if a name exists
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int hasname( const char *needle )
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{
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if ( !needle ) return 0;
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size_t prev = fpos;
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fpos = head->onames;
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int found = 0;
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int nlen = strlen(needle);
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for ( uint32_t i=0; i<head->nnames; i++ )
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{
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int32_t len = 0;
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if ( head->pkgver >= 64 )
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{
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len = readindex();
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if ( len <= 0 ) continue;
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}
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int c = 0, p = 0, match = 1;
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while ( (c = readbyte()) )
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{
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if ( (p >= nlen) || (needle[p] != c) ) match = 0;
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p++;
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if ( len && (p > len) ) break;
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}
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if ( match )
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{
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found = 1;
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break;
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}
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fpos += 4;
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}
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fpos = prev;
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return found;
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}
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// read import table entry and return index of its object name
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int32_t readimport( void )
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{
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readindex();
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readindex();
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if ( head->pkgver >= 55 ) fpos += 4;
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else readindex();
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return readindex();
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}
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int32_t getimport( int index )
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{
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size_t prev = fpos;
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fpos = head->oimports;
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int32_t iname = 0;
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for ( int i=0; i<=index; i++ )
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iname = readimport();
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fpos = prev;
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return iname;
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}
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// fully read import table entry
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void readimport2( int32_t *cpkg, int32_t *cname, int32_t *pkg, int32_t *name )
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{
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*cpkg = readindex();
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*cname = readindex();
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if ( head->pkgver >= 55 ) *pkg = readdword();
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else *pkg = readindex();
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*name = readindex();
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}
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void getimport2( int index, int32_t *cpkg, int32_t *cname, int32_t *pkg,
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int32_t *name )
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{
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size_t prev = fpos;
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fpos = head->oimports;
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for ( int i=0; i<=index; i++ )
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readimport2(cpkg,cname,pkg,name);
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fpos = prev;
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}
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// read export table entry
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void readexport( int32_t *class, int32_t *ofs, int32_t *siz, int32_t *name )
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{
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*class = readindex();
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readindex();
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if ( head->pkgver >= 55 ) fpos += 4;
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*name = readindex();
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fpos += 4;
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*siz = readindex();
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if ( *siz > 0 ) *ofs = readindex();
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}
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void getexport( int index, int32_t *class, int32_t *ofs, int32_t *siz,
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int32_t *name )
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{
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size_t prev = fpos;
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fpos = head->oexports;
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for ( int i=0; i<=index; i++ )
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readexport(class,ofs,siz,name);
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fpos = prev;
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}
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// fully read export table entry
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void readexport2( int32_t *class, int32_t *super, int32_t *pkg, int32_t *name,
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uint32_t *flags, int32_t *siz, int32_t *ofs )
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{
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*class = readindex();
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*super = readindex();
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if ( head->pkgver >= 55 ) *pkg = readdword();
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else *pkg = readindex();
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*name = readindex();
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*flags = readdword();
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*siz = readindex();
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if ( *siz > 0 ) *ofs = readindex();
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}
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void getexport2( int index, int32_t *class, int32_t *super, int32_t *pkg,
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int32_t *name, uint32_t *flags, int32_t *siz, int32_t *ofs )
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{
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size_t prev = fpos;
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fpos = head->oexports;
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for ( int i=0; i<=index; i++ )
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readexport2(class,super,pkg,name,flags,siz,ofs);
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fpos = prev;
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}
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void savesound( int32_t namelen, char *name, int version )
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{
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char fname[256] = {0};
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int32_t fmt = readindex(); // not really needed, always assume wav
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int32_t grp, grouplen;
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char *group;
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if ( version > 35 )
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{
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// ????
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readindex();
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readindex();
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grp = readindex();
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grouplen = 0;
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group = (char*)(pkgfile+getname(grp,&grouplen));
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// ????
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readindex();
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}
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else
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{
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grp = readindex();
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grouplen = 0;
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group = (char*)(pkgfile+getname(grp,&grouplen));
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readindex(); // unknown
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}
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uint32_t ofsnext = 0;
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if ( version >= 63 ) ofsnext = readdword(); // not needed but gotta read
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// the actual important info starts now
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int32_t sndsize = readindex();
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char *snddata = (char*)(pkgfile+fpos);
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if ( strncmp(group,"None",grouplen) ) snprintf(fname,256,"%.*s.%.*s.wav",grouplen,group,namelen,name);
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else snprintf(fname,256,"%.*s.wav",namelen,name);
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FILE *f = fopen(fname,"wb");
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fwrite(snddata,sndsize,1,f);
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fclose(f);
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}
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int main( int argc, char **argv )
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{
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if ( argc < 2 )
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{
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printf("Usage: usndextract <archive>\n");
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return 1;
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}
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int fd = open(argv[1],O_RDONLY);
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if ( fd == -1 )
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{
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printf("Failed to open file %s: %s\n",argv[1],strerror(errno));
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return 1;
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}
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struct stat st;
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fstat(fd,&st);
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pkgfile = malloc(st.st_size);
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memset(pkgfile,0,st.st_size);
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head = (upkg_header_t*)pkgfile;
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int r = 0;
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do
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{
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r = read(fd,pkgfile+fpos,131072);
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if ( r == -1 )
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{
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close(fd);
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free(pkgfile);
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printf("Read failed for file %s: %s\n",argv[1],
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strerror(errno));
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return 4;
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}
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fpos += r;
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}
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while ( r > 0 );
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close(fd);
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fpos = 0;
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if ( head->magic != UPKG_MAGIC )
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{
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printf("File %s is not a valid unreal package!\n",argv[1]);
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free(pkgfile);
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return 2;
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}
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if ( !hasname("Sound") )
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{
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printf("Package %s does not contain sounds\n",argv[1]);
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free(pkgfile);
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return 4;
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}
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// loop through exports and search for sounds
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fpos = head->oexports;
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for ( uint32_t i=0; i<head->nexports; i++ )
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{
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int32_t class, ofs, siz, name;
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readexport(&class,&ofs,&siz,&name);
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if ( (siz <= 0) || (class >= 0) ) continue;
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// get the class name
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class = -class-1;
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if ( (uint32_t)class > head->nimports ) continue;
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int32_t l = 0;
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char *n = (char*)(pkgfile+getname(getimport(class),&l));
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int ismesh = !strncmp(n,"Sound",l);
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if ( !ismesh ) continue;
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char *snd = (char*)(pkgfile+getname(name,&l));
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printf("Sound found: %.*s\n",l,snd);
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int32_t sndl = l;
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#ifdef _DEBUG
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char fname[256] = {0};
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snprintf(fname,256,"%.*s.object",sndl,snd);
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printf(" Dumping full object data to %s\n",fname);
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FILE *f = fopen(fname,"wb");
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fwrite(pkgfile+ofs,siz,1,f);
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fclose(f);
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continue;
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#endif
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// begin reading data
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size_t prev = fpos;
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fpos = ofs;
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if ( head->pkgver < 45 ) fpos += 4;
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if ( head->pkgver < 55 ) fpos += 16;
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if ( head->pkgver <= 44 ) fpos -= 6; // ???
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if ( head->pkgver <= 35 ) fpos += 8; // ???
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// only very old packages have properties for sound classes
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if ( head->pkgver > 35 )
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goto noprop;
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// process properties
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int32_t prop = readindex();
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if ( (uint32_t)prop >= head->nnames )
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{
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printf("Unknown property %d, skipping\n",prop);
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fpos = prev;
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continue;
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}
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char *pname = (char*)(pkgfile+getname(prop,&l));
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retry:
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if ( strncasecmp(pname,"None",l) )
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{
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uint8_t info = readbyte();
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int array = info&0x80;
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int type = info&0xf;
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int psiz = (info>>4)&0x7;
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switch ( psiz )
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{
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case 0:
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psiz = 1;
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break;
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case 1:
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psiz = 2;
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break;
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case 2:
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psiz = 4;
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break;
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case 3:
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psiz = 12;
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break;
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case 4:
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psiz = 16;
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break;
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case 5:
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psiz = readbyte();
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break;
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case 6:
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psiz = readword();
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break;
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case 7:
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psiz = readdword();
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break;
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}
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printf(" prop %.*s (%u, %u, %u, %u)\n",l,pname,array,type,(info>>4)&7,psiz);
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if ( array && (type != 3) )
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{
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int idx = readindex();
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printf(" index: %d\n",idx);
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}
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if ( type == 10 )
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{
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int32_t tl, sn;
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sn = readindex();
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char *sname = (char*)(pkgfile+getname(sn,&tl));
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printf(" struct: %.*s\n",tl,sname);
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}
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fpos += psiz;
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prop = readindex();
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pname = (char*)(pkgfile+getname(prop,&l));
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goto retry;
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}
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noprop:
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savesound(sndl,snd,head->pkgver);
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fpos = prev;
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}
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free(pkgfile);
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return 0;
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}
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