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|
/*****************************************************************
|
| AP4 - trun Atoms
|
| 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.
|
****************************************************************/
#ifndef _AP4_TRUN_ATOM_H_
#define _AP4_TRUN_ATOM_H_
/*----------------------------------------------------------------------
| includes
+---------------------------------------------------------------------*/
#include "Ap4Atom.h"
#include "Ap4Array.h"
/*----------------------------------------------------------------------
| constants
+---------------------------------------------------------------------*/
const AP4_UI32 AP4_TRUN_FLAG_DATA_OFFSET_PRESENT = 0x0001;
const AP4_UI32 AP4_TRUN_FLAG_FIRST_SAMPLE_FLAGS_PRESENT = 0x0004;
const AP4_UI32 AP4_TRUN_FLAG_SAMPLE_DURATION_PRESENT = 0x0100;
const AP4_UI32 AP4_TRUN_FLAG_SAMPLE_SIZE_PRESENT = 0x0200;
const AP4_UI32 AP4_TRUN_FLAG_SAMPLE_FLAGS_PRESENT = 0x0400;
const AP4_UI32 AP4_TRUN_FLAG_SAMPLE_COMPOSITION_TIME_OFFSET_PRESENT = 0x0800;
/*----------------------------------------------------------------------
| AP4_TrunAtom
+---------------------------------------------------------------------*/
class AP4_TrunAtom : public AP4_Atom
{
public:
AP4_IMPLEMENT_DYNAMIC_CAST(AP4_TrunAtom)
// types
struct Entry {
Entry() : sample_duration(0), sample_size(0), sample_flags(0), sample_composition_time_offset(0) {}
AP4_UI32 sample_duration;
AP4_UI32 sample_size;
AP4_UI32 sample_flags;
AP4_UI32 sample_composition_time_offset;
};
// class methods
static AP4_TrunAtom* Create(AP4_Size size, AP4_ByteStream& stream);
static unsigned int ComputeOptionalFieldsCount(AP4_UI32 flags);
static unsigned int ComputeRecordFieldsCount(AP4_UI32 flags);
// methods
AP4_TrunAtom(AP4_UI32 flags,
AP4_SI32 data_offset,
AP4_UI32 first_sample_flags);
virtual AP4_Result InspectFields(AP4_AtomInspector& inspector);
virtual AP4_Result WriteFields(AP4_ByteStream& stream);
// accessors
AP4_SI32 GetDataOffset() { return m_DataOffset; }
void SetDataOffset(AP4_SI32 offset) { m_DataOffset = offset; }
AP4_UI32 GetFirstSampleFlags() { return m_FirstSampleFlags; }
const AP4_Array<Entry>& GetEntries() { return m_Entries; }
AP4_Array<Entry>& UseEntries() { return m_Entries; }
AP4_Result SetEntries(const AP4_Array<Entry>& entries);
private:
// methods
AP4_TrunAtom(AP4_UI32 size,
AP4_UI08 version,
AP4_UI32 flags,
AP4_ByteStream& stream);
// members
AP4_SI32 m_DataOffset;
AP4_UI32 m_FirstSampleFlags;
AP4_Array<Entry> m_Entries;
};
#endif // _AP4_TRUN_ATOM_H_
|
