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///////////////////////////////////////////////////////////////////////////////
//
// The contents of this file are subject to the Mozilla Public License
// Version 1.1 (the "License"); you may not use this file except in
// compliance with the License. You may obtain a copy of the License at
// http://www.mozilla.org/MPL/
//
// Software distributed under the License is distributed on an "AS IS"
// basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
// License for the specific language governing rights and limitations
// under the License.
//
// The Original Code is MP4v2.
//
// The Initial Developer of the Original Code is Kona Blend.
// Portions created by Kona Blend are Copyright (C) 2008.
// All Rights Reserved.
//
// Contributors:
// Kona Blend, kona8lend@@gmail.com
//
///////////////////////////////////////////////////////////////////////////////
#include "libutil/impl.h"
namespace mp4v2 { namespace util {
using namespace mp4v2::impl;
///////////////////////////////////////////////////////////////////////////////
// search atom recursively for any 64-bit characteristics.
// nlargsize indicates number of atoms which use largesize extension.
// nversion1 indicates number of atoms which use version==1 extension.
// nspecial indicates number of special 64-bit atoms;
// eg: stbl may container one of { stco || co64 } for chunkoffsets.
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 );
}
}
///////////////////////////////////////////////////////////////////////////////
bool
fileFetchSummaryInfo( MP4FileHandle file, FileSummaryInfo& info )
{
if( file == MP4_INVALID_FILE_HANDLE )
return true;
MP4File& mp4 = *((MP4File*)file);
MP4Atom* root = mp4.FindAtom( "" );
if( !root )
return true;
MP4FtypAtom* ftyp = (MP4FtypAtom*)root->FindAtom( "ftyp" );
if( !ftyp )
return true;
info.major_brand = ftyp->majorBrand.GetValue();
info.minor_version = ftyp->minorVersion.GetValue();
const uint32_t cbmax = ftyp->compatibleBrands.GetCount();
for( uint32_t i = 0; i < cbmax; i++ ) {
string s = ftyp->compatibleBrands.GetValue( i );
// remove spaces so brand set is presentable
string stripped;
const string::size_type max = s.length();
for( string::size_type pos = 0; pos < max; pos++ ) {
if( s[pos] != ' ' )
stripped += s[pos];
}
if( stripped.empty() )
continue;
info.compatible_brands.insert( stripped );
}
info.nlargesize = 0;
info.nversion1 = 0;
info.nspecial = 0;
searchFor64bit( *root, info );
return false;
}
///////////////////////////////////////////////////////////////////////////////
}} // namespace mp4v2::util
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