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107 lines
3.2 KiB
107 lines
3.2 KiB
///////////////////////////////////////////////////////////////////////////////
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//
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// The contents of this file are subject to the Mozilla Public License
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// Version 1.1 (the "License"); you may not use this file except in
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// compliance with the License. You may obtain a copy of the License at
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// http://www.mozilla.org/MPL/
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//
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// Software distributed under the License is distributed on an "AS IS"
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// basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
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// License for the specific language governing rights and limitations
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// under the License.
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//
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// The Original Code is MP4v2.
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//
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// The Initial Developer of the Original Code is Kona Blend.
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// Portions created by Kona Blend are Copyright (C) 2008.
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// All Rights Reserved.
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//
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// Contributors:
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// Kona Blend, kona8lend@@gmail.com
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//
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///////////////////////////////////////////////////////////////////////////////
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#include "libutil/impl.h"
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namespace mp4v2 { namespace util {
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using namespace mp4v2::impl;
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///////////////////////////////////////////////////////////////////////////////
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// search atom recursively for any 64-bit characteristics.
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// nlargsize indicates number of atoms which use largesize extension.
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// nversion1 indicates number of atoms which use version==1 extension.
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// nspecial indicates number of special 64-bit atoms;
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// eg: stbl may container one of { stco || co64 } for chunkoffsets.
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void
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searchFor64bit( MP4Atom& atom, FileSummaryInfo& info )
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{
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const uint32_t max = atom.GetNumberOfChildAtoms();
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for( uint32_t i = 0; i < max; i++ ) {
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MP4Atom& child = *atom.GetChildAtom( i );
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if( child.GetLargesizeMode() )
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info.nlargesize++;
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MP4Integer8Property* version;
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if( child.FindProperty( "version", (MP4Property**)&version ) && version->GetValue() == 1 )
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info.nversion1++;
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if( !strcmp( child.GetType(), "co64" ))
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info.nspecial++;
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searchFor64bit( child, info );
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}
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}
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///////////////////////////////////////////////////////////////////////////////
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bool
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fileFetchSummaryInfo( MP4FileHandle file, FileSummaryInfo& info )
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{
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if( file == MP4_INVALID_FILE_HANDLE )
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return true;
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MP4File& mp4 = *((MP4File*)file);
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MP4Atom* root = mp4.FindAtom( "" );
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if( !root )
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return true;
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MP4FtypAtom* ftyp = (MP4FtypAtom*)root->FindAtom( "ftyp" );
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if( !ftyp )
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return true;
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info.major_brand = ftyp->majorBrand.GetValue();
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info.minor_version = ftyp->minorVersion.GetValue();
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const uint32_t cbmax = ftyp->compatibleBrands.GetCount();
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for( uint32_t i = 0; i < cbmax; i++ ) {
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string s = ftyp->compatibleBrands.GetValue( i );
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// remove spaces so brand set is presentable
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string stripped;
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const string::size_type max = s.length();
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for( string::size_type pos = 0; pos < max; pos++ ) {
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if( s[pos] != ' ' )
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stripped += s[pos];
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}
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if( stripped.empty() )
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continue;
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info.compatible_brands.insert( stripped );
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}
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info.nlargesize = 0;
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info.nversion1 = 0;
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info.nspecial = 0;
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searchFor64bit( *root, info );
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return false;
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}
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///////////////////////////////////////////////////////////////////////////////
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}} // namespace mp4v2::util
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