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|
/*****************************************************************
|
| AP4 - File
|
| Copyright 2002-2008 Axiomatic Systems, LLC
|
|
| This file is part of Bento4/AP4 (MP4 Atom Processing Library).
|
| Unless you have obtained Bento4 under a difference license,
| this version of Bento4 is Bento4|GPL.
| Bento4|GPL is free software; you can redistribute it and/or modify
| it under the terms of the GNU General Public License as published by
| the Free Software Foundation; either version 2, or (at your option)
| any later version.
|
| Bento4|GPL is distributed in the hope that it will be useful,
| but WITHOUT ANY WARRANTY; without even the implied warranty of
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
| GNU General Public License for more details.
|
| You should have received a copy of the GNU General Public License
| along with Bento4|GPL; see the file COPYING. If not, write to the
| Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA
| 02111-1307, USA.
|
****************************************************************/
/*----------------------------------------------------------------------
| includes
+---------------------------------------------------------------------*/
#include "Ap4File.h"
#include "Ap4Atom.h"
#include "Ap4TrakAtom.h"
#include "Ap4MoovAtom.h"
#include "Ap4MvhdAtom.h"
#include "Ap4AtomFactory.h"
#include "Ap4Movie.h"
#include "Ap4FtypAtom.h"
#include "Ap4MetaData.h"
/*----------------------------------------------------------------------
| AP4_File::AP4_File
+---------------------------------------------------------------------*/
AP4_File::AP4_File(AP4_Movie* movie) :
m_Movie(movie),
m_FileType(NULL),
m_MetaData(NULL),
m_MoovIsBeforeMdat(true)
{
}
/*----------------------------------------------------------------------
| AP4_File::AP4_File
+---------------------------------------------------------------------*/
AP4_File::AP4_File(AP4_ByteStream& stream,
AP4_AtomFactory& atom_factory,
bool moov_only,
AP4_Movie* movie) :
m_Movie(movie),
m_FileType(NULL),
m_MetaData(NULL),
m_MoovIsBeforeMdat(true)
{
ParseStream(stream, atom_factory, moov_only, movie);
}
/*----------------------------------------------------------------------
| AP4_File::AP4_File
+---------------------------------------------------------------------*/
AP4_File::AP4_File(AP4_ByteStream& stream,
bool moov_only) :
m_Movie(NULL),
m_FileType(NULL),
m_MetaData(NULL),
m_MoovIsBeforeMdat(true)
{
AP4_DefaultAtomFactory atom_factory;
ParseStream(stream, atom_factory, moov_only, m_Movie);
}
/*----------------------------------------------------------------------
| AP4_File::~AP4_File
+---------------------------------------------------------------------*/
AP4_File::~AP4_File()
{
delete m_Movie;
delete m_MetaData;
}
/*----------------------------------------------------------------------
| AP4_File::ParseStream
+---------------------------------------------------------------------*/
void
AP4_File::ParseStream(AP4_ByteStream& stream,
AP4_AtomFactory& atom_factory,
bool moov_only,
AP4_Movie* movie)
{
// parse top-level atoms
AP4_Atom* atom;
AP4_Position stream_position;
bool keep_parsing = movie == 0;
while (keep_parsing &&
AP4_SUCCEEDED(stream.Tell(stream_position)) &&
AP4_SUCCEEDED(atom_factory.CreateAtomFromStream(stream, atom))) {
AddChild(atom);
switch (atom->GetType()) {
case AP4_ATOM_TYPE_MOOV:
m_Movie = new AP4_Movie(AP4_DYNAMIC_CAST(AP4_MoovAtom, atom), stream, false);
if (moov_only) keep_parsing = false;
break;
case AP4_ATOM_TYPE_FTYP:
m_FileType = AP4_DYNAMIC_CAST(AP4_FtypAtom, atom);
break;
case AP4_ATOM_TYPE_MDAT:
// see if we are before the moov atom
if (m_Movie == NULL) m_MoovIsBeforeMdat = false;
break;
}
}
}
/*----------------------------------------------------------------------
| AP4_File::Inspect
+---------------------------------------------------------------------*/
AP4_Result
AP4_File::Inspect(AP4_AtomInspector& inspector)
{
// dump the moov atom first
if (m_Movie) m_Movie->Inspect(inspector);
// dump the other atoms
m_Children.Apply(AP4_AtomListInspector(inspector));
return AP4_SUCCESS;
}
/*----------------------------------------------------------------------
| AP4_File::SetFileType
+---------------------------------------------------------------------*/
AP4_Result
AP4_File::SetFileType(AP4_UI32 major_brand,
AP4_UI32 minor_version,
AP4_UI32* compatible_brands,
AP4_Cardinal compatible_brand_count)
{
if (m_FileType) {
RemoveChild(m_FileType);
delete m_FileType;
}
m_FileType = new AP4_FtypAtom(major_brand,
minor_version,
compatible_brands,
compatible_brand_count);
AddChild(m_FileType, 0);
return AP4_SUCCESS;
}
/*----------------------------------------------------------------------
| AP4_File::GetMetaData
+---------------------------------------------------------------------*/
const AP4_MetaData*
AP4_File::GetMetaData()
{
if (m_MetaData == NULL) {
m_MetaData = new AP4_MetaData(this);
}
return m_MetaData;
}
|
