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//
// /home/ms/source/sidplay/libsidplay/fformat/RCS/psid_.cpp,v
//
#include "psid_.h"
const char text_format[] = "PlaySID one-file format (PSID)";
const char text_psidTruncated[] = "ERROR: PSID file is most likely truncated";
const int maxStringLength = 31;
bool sidTune::PSID_fileSupport(const void* buffer, udword bufLen)
{
// Remove any format description or format error string.
info.formatString = 0;
// Require a first minimum size.
if (bufLen < 6)
{
return false;
}
// Now it is safe to access the first bytes.
// Require a valid ID and version number.
const psidHeader* pHeader = (const psidHeader*)buffer;
if ( (readBEdword((const ubyte*)pHeader->id) != 0x50534944) // "PSID" ?
|| (readBEword(pHeader->version) >= 3) )
{
return false;
}
// Due to security concerns, input must be at least as long as version 1
// plus C64 load address data. That is the area which will be accessed.
if ( bufLen < (sizeof(psidHeader)+2) )
{
info.formatString = text_psidTruncated;
return false;
}
fileOffset = readBEword(pHeader->data);
info.loadAddr = readBEword(pHeader->load);
info.initAddr = readBEword(pHeader->init);
info.playAddr = readBEword(pHeader->play);
info.songs = readBEword(pHeader->songs);
info.startSong = readBEword(pHeader->start);
if (info.songs > classMaxSongs)
{
info.songs = classMaxSongs;
}
info.musPlayer = false;
info.psidSpecific = false;
if ( readBEword(pHeader->version) >= 2 )
{
if ( readBEword(pHeader->flags) & 0x01 )
{
info.musPlayer = true;
}
if ( readBEword(pHeader->flags) & 0x02 )
{
info.psidSpecific = true;
}
info.clock = ( readBEword(pHeader->flags)&0x0c ) >> 2;
info.sidModel = ( readBEword(pHeader->flags)&0x30 ) >> 4;
info.relocStartPage = pHeader->relocStartPage;
info.relocPages = pHeader->relocPages;
info.reserved = readBEword(pHeader->reserved);
}
else
{
info.clock = SIDTUNE_CLOCK_UNKNOWN;
info.sidModel = SIDTUNE_SIDMODEL_UNKNOWN;
info.relocStartPage = info.relocPages = 0;
info.reserved = 0;
}
// Create the speed/clock setting table.
convertOldStyleSpeedToTables(readBEdword(pHeader->speed));
if ( info.loadAddr == 0 )
{
ubyte* pData = (ubyte*)buffer + fileOffset;
info.loadAddr = readEndian( *(pData+1), *pData );
fileOffset += 2;
}
if ( info.initAddr == 0 )
{
info.initAddr = info.loadAddr;
}
// Copy info strings, so they will not get lost.
strncpy(&infoString[0][0],pHeader->name,maxStringLength);
info.nameString = &infoString[0][0];
info.infoString[0] = &infoString[0][0];
strncpy(&infoString[1][0],pHeader->author,maxStringLength);
info.authorString = &infoString[1][0];
info.infoString[1] = &infoString[1][0];
strncpy(&infoString[2][0],pHeader->copyright,maxStringLength);
info.copyrightString = &infoString[2][0];
info.infoString[2] = &infoString[2][0];
info.numberOfInfoStrings = 3;
info.formatString = text_format;
return true;
}
bool sidTune::PSID_fileSupportSave(ofstream& fMyOut, const ubyte* dataBuffer)
{
psidHeader myHeader;
writeBEdword((ubyte*)myHeader.id,0x50534944); // 'PSID'
writeBEword(myHeader.version,2);
writeBEword(myHeader.data,0x7C);
writeBEword(myHeader.load,0);
writeBEword(myHeader.init,info.initAddr);
writeBEword(myHeader.play,info.playAddr);
writeBEword(myHeader.songs,info.songs);
writeBEword(myHeader.start,info.startSong);
udword speed = 0;
int maxBugSongs = ((info.songs <= 32) ? info.songs : 32);
for (int s = 0; s < maxBugSongs; s++)
{
if (songSpeed[s] == SIDTUNE_SPEED_CIA_1A)
{
speed |= (1<<s);
}
}
writeBEdword(myHeader.speed,speed);
uword tmpFlags = (info.clock<<2)|(info.sidModel<<4);
if ( info.musPlayer )
{
tmpFlags |= 0x01;
}
if ( info.psidSpecific )
{
tmpFlags |= 0x02;
}
writeBEword(myHeader.flags,tmpFlags);
myHeader.relocStartPage = info.relocStartPage;
myHeader.relocPages = info.relocPages;
writeBEword(myHeader.reserved,info.reserved);
for ( int i = 0; i < 32; i++ )
{
myHeader.name[i] = 0;
myHeader.author[i] = 0;
myHeader.copyright[i] = 0;
}
strncpy( myHeader.name, info.nameString, 31 );
strncpy( myHeader.author, info.authorString, 31 );
strncpy( myHeader.copyright, info.copyrightString, 31 );
fMyOut.write( (char*)&myHeader, sizeof(psidHeader) );
// Save C64 lo/hi load address (little-endian).
ubyte saveAddr[2];
saveAddr[0] = info.loadAddr & 255;
saveAddr[1] = info.loadAddr >> 8;
fMyOut.write( (char*)saveAddr, 2 );
// Data starts at: bufferaddr + fileoffset
// Data length: datafilelen - fileoffset
fMyOut.write( (const char*)dataBuffer + fileOffset, info.dataFileLen - fileOffset );
if ( !fMyOut )
{
return false;
}
else
{
return true;
}
}
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