Ap4EsdsAtom.cpp
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上传日期:2015-12-05
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- /*****************************************************************
- |
- | AP4 - esds Atoms
- |
- | Copyright 2002 Gilles Boccon-Gibod
- |
- |
- | 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 "Ap4.h"
- #include "Ap4EsdsAtom.h"
- #include "Ap4DescriptorFactory.h"
- #include "Ap4Utils.h"
- /*----------------------------------------------------------------------
- | AP4_EsdsAtom::AP4_EsdsAtom
- +---------------------------------------------------------------------*/
- AP4_EsdsAtom::AP4_EsdsAtom(AP4_EsDescriptor* descriptor) :
- AP4_Atom(AP4_ATOM_TYPE_ESDS, AP4_FULL_ATOM_HEADER_SIZE, true),
- m_EsDescriptor(descriptor)
- {
- if (m_EsDescriptor) m_Size += m_EsDescriptor->GetSize();
- }
- /*----------------------------------------------------------------------
- | AP4_EsdsAtom::AP4_EsdsAtom
- +---------------------------------------------------------------------*/
- AP4_EsdsAtom::AP4_EsdsAtom(AP4_Size size, AP4_ByteStream& stream) :
- AP4_Atom(AP4_ATOM_TYPE_ESDS, size, true, stream)
- {
- // read descriptor
- AP4_Descriptor* descriptor = NULL;
- if (AP4_DescriptorFactory::CreateDescriptorFromStream(stream, descriptor)
- == AP4_SUCCESS) {
- m_EsDescriptor = dynamic_cast<AP4_EsDescriptor*>(descriptor);
- } else {
- m_EsDescriptor = NULL;
- }
- }
- /*----------------------------------------------------------------------
- | AP4_EsdsAtom::~AP4_EsdsAtom
- +---------------------------------------------------------------------*/
- AP4_EsdsAtom::~AP4_EsdsAtom()
- {
- delete m_EsDescriptor;
- }
- /*----------------------------------------------------------------------
- | AP4_EsdsAtom::WriteFields
- +---------------------------------------------------------------------*/
- AP4_Result
- AP4_EsdsAtom::WriteFields(AP4_ByteStream& stream)
- {
- // write the es descriptor
- if (m_EsDescriptor) return m_EsDescriptor->Write(stream);
- return AP4_SUCCESS;
- }
- /*----------------------------------------------------------------------
- | AP4_EsdsAtom::InspectFields
- +---------------------------------------------------------------------*/
- AP4_Result
- AP4_EsdsAtom::InspectFields(AP4_AtomInspector& inspector)
- {
- // inspect descriptor
- if (m_EsDescriptor) {
- m_EsDescriptor->Inspect(inspector);
- }
- return AP4_SUCCESS;
- }