bool
genericSetItem( MP4File& file, const MP4ItmfItem* item )
{
if( !item || !item->__handle )
return false;
MP4Atom* ilst = file.FindAtom( "moov.udta.meta.ilst" );
if( !ilst )
return false;
MP4ItemAtom* const old = static_cast<MP4ItemAtom*>(item->__handle);
const uint32_t childCount = ilst->GetNumberOfChildAtoms();
uint32_t fidx = numeric_limits<uint32_t>::max();
for( uint32_t i = 0; i < childCount; i++ ) {
MP4Atom* atom = ilst->GetChildAtom( i );
if( atom == old ) {
fidx = i;
break;
}
}
if( fidx == numeric_limits<uint32_t>::max() )
return false;
ilst->DeleteChildAtom( old );
delete old;
MP4ItemAtom& itemAtom = *(MP4ItemAtom*)MP4Atom::CreateAtom( file, ilst, item->code );
ilst->InsertChildAtom( &itemAtom, fidx );
return __itemModelToAtom( *item, itemAtom );
}
MP4ItmfItemList*
genericGetItemsByCode( MP4File& file, const string& code )
{
MP4Atom* ilst = file.FindAtom( "moov.udta.meta.ilst" );
if( !ilst )
return __itemListAlloc();
// pass 1: filter by code and populate indexList
const uint32_t childCount = ilst->GetNumberOfChildAtoms();
vector<uint32_t> indexList;
for( uint32_t i = 0; i < childCount; i++ ) {
if( ATOMID( ilst->GetChildAtom( i )->GetType() ) != ATOMID( code.c_str() ))
continue;
indexList.push_back( i );
}
if( indexList.size() < 1 )
return __itemListAlloc();
MP4ItmfItemList& list = *__itemListAlloc();
__itemListResize( list, (uint32_t)indexList.size() );
// pass 2: process each atom
const vector<uint32_t>::size_type max = indexList.size();
for( vector<uint32_t>::size_type i = 0; i < max; i++ ) {
uint32_t& aidx = indexList[i];
__itemAtomToModel( *(MP4ItemAtom*)ilst->GetChildAtom( aidx ), list.elements[i] );
}
return &list;
}
MP4ItmfItemList*
genericGetItemsByMeaning( MP4File& file, const string& meaning, const string& name )
{
MP4Atom* ilst = file.FindAtom( "moov.udta.meta.ilst" );
if( !ilst )
return __itemListAlloc();
// pass 1: filter by code and populate indexList
const uint32_t childCount = ilst->GetNumberOfChildAtoms();
vector<uint32_t> indexList;
for( uint32_t i = 0; i < childCount; i++ ) {
MP4Atom& atom = *ilst->GetChildAtom( i );
if( ATOMID( atom.GetType() ) != ATOMID( "----" ))
continue;
// filter-out meaning mismatch
MP4MeanAtom* meanAtom = (MP4MeanAtom*)atom.FindAtom( "----.mean" );
if( !meanAtom )
continue;
if( meanAtom->value.CompareToString( meaning ))
continue;
if( !name.empty() ) {
// filter-out name mismatch
MP4MeanAtom* nameAtom = (MP4MeanAtom*)atom.FindAtom( "----.name" );
if( !nameAtom )
continue;
if( nameAtom->value.CompareToString( name ))
continue;
}
indexList.push_back( i );
}
if( indexList.size() < 1 )
return __itemListAlloc();
MP4ItmfItemList& list = *__itemListAlloc();
__itemListResize( list, (uint32_t)indexList.size() );
// pass 2: process each atom
const vector<uint32_t>::size_type max = indexList.size();
for( vector<uint32_t>::size_type i = 0; i < max; i++ ) {
uint32_t& aidx = indexList[i];
__itemAtomToModel( *(MP4ItemAtom*)ilst->GetChildAtom( aidx ), list.elements[i] );
}
return &list;
}
MP4ItmfItemList*
genericGetItems( MP4File& file )
{
MP4Atom* ilst = file.FindAtom( "moov.udta.meta.ilst" );
if( !ilst )
return __itemListAlloc();
const uint32_t itemCount = ilst->GetNumberOfChildAtoms();
if( itemCount < 1 )
return __itemListAlloc();
MP4ItmfItemList& list = *__itemListAlloc();
__itemListResize( list, itemCount );
for( uint32_t i = 0; i < list.size; i++ )
__itemAtomToModel( *(MP4ItemAtom*)ilst->GetChildAtom( i ), list.elements[i] );
return &list;
}
void
searchFor64bit( MP4Atom& atom, FileSummaryInfo& info )
{
const uint32_t max = atom.GetNumberOfChildAtoms();
for( uint32_t i = 0; i < max; i++ ) {
MP4Atom& child = *atom.GetChildAtom( i );
if( child.GetLargesizeMode() )
info.nlargesize++;
MP4Integer8Property* version;
if( child.FindProperty( "version", (MP4Property**)&version ) && version->GetValue() == 1 )
info.nversion1++;
if( !strcmp( child.GetType(), "co64" ))
info.nspecial++;
searchFor64bit( child, info );
}
}