void P2_MetaHandler::CacheFileData()
{
XMP_Assert ( ! this->containsXMP );
if ( this->parent->UsesClientIO() ) {
XMP_Throw ( "P2 cannot be used with client-managed I/O", kXMPErr_InternalFailure );
}
// Make sure the clip's .XMP file exists.
std::string xmpPath;
this->MakeClipFilePath ( &xmpPath, ".XMP" );
if ( ! Host_IO::Exists ( xmpPath.c_str() ) ) return; // No XMP.
// Read the entire .XMP file. We know the XMP exists, New_XMPFiles_IO is supposed to return 0
// only if the file does not exist.
bool readOnly = XMP_OptionIsClear ( this->parent->openFlags, kXMPFiles_OpenForUpdate );
XMP_Assert ( this->parent->ioRef == 0 );
XMPFiles_IO* xmpFile = XMPFiles_IO::New_XMPFiles_IO ( xmpPath.c_str(), readOnly );
if ( xmpFile == 0 ) XMP_Throw ( "P2 XMP file open failure", kXMPErr_InternalFailure );
this->parent->ioRef = xmpFile;
XMP_Int64 xmpLen = xmpFile->Length();
if ( xmpLen > 100*1024*1024 ) {
XMP_Throw ( "P2 XMP is outrageously large", kXMPErr_InternalFailure ); // Sanity check.
}
this->xmpPacket.erase();
this->xmpPacket.append ( (size_t)xmpLen, ' ' );
/*XMP_Int32 ioCount =*/ xmpFile->ReadAll ( (void*)this->xmpPacket.data(), (XMP_Int32)xmpLen );
this->packetInfo.offset = 0;
this->packetInfo.length = (XMP_Int32)xmpLen;
FillPacketInfo ( this->xmpPacket, &this->packetInfo );
this->containsXMP = true;
} // P2_MetaHandler::CacheFileData
void MPEG2_MetaHandler::CacheFileData()
{
bool readOnly = (! (this->parent->openFlags & kXMPFiles_OpenForUpdate));
if ( this->parent->UsesClientIO() ) {
XMP_Throw ( "MPEG2 cannot be used with client-managed I/O", kXMPErr_InternalFailure );
}
this->containsXMP = false;
this->processedXMP = true; // Whatever we do here is all that we do for XMPFiles::OpenFile.
// Try to open the sidecar XMP file. Tolerate an open failure, there might not be any XMP.
// Note that MPEG2_CheckFormat can't save the sidecar path because the handler doesn't exist then.
if ( ! Host_IO::Exists ( this->sidecarPath.c_str() ) ) return; // OK to not have XMP.
XMPFiles_IO * localFile = XMPFiles_IO::New_XMPFiles_IO ( this->sidecarPath.c_str(), readOnly );
if ( localFile == 0 ) XMP_Throw ( "Failure opening MPEG-2 XMP file", kXMPErr_ExternalFailure );
this->parent->ioRef = localFile;
// Extract the sidecar's contents and parse.
this->packetInfo.offset = 0; // We take the whole sidecar file.
this->packetInfo.length = (XMP_Int32) localFile->Length();
if ( this->packetInfo.length > 0 ) {
this->xmpPacket.assign ( this->packetInfo.length, ' ' );
localFile->ReadAll ( (void*)this->xmpPacket.c_str(), this->packetInfo.length );
this->xmpObj.ParseFromBuffer ( this->xmpPacket.c_str(), (XMP_StringLen)this->xmpPacket.size() );
this->containsXMP = true;
}
if ( readOnly ) {
localFile->Close();
delete localFile;
this->parent->ioRef = 0;
}
} // MPEG2_MetaHandler::CacheFileData
