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|
/*****************************************************************
|
| AP4 - vmhd 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.
|
****************************************************************/
/*----------------------------------------------------------------------
| includes
+---------------------------------------------------------------------*/
#include "Ap4VmhdAtom.h"
#include "Ap4AtomFactory.h"
#include "Ap4Utils.h"
#include "Ap4Types.h"
/*----------------------------------------------------------------------
| AP4_VmhdAtom::Create
+---------------------------------------------------------------------*/
AP4_VmhdAtom*
AP4_VmhdAtom::Create(AP4_Size size, AP4_ByteStream& stream)
{
AP4_UI08 version;
AP4_UI32 flags;
if (AP4_FAILED(AP4_Atom::ReadFullHeader(stream, version, flags))) return NULL;
if (version != 0) return NULL;
return new AP4_VmhdAtom(size, version, flags, stream);
}
/*----------------------------------------------------------------------
| AP4_VmhdAtom::AP4_VmhdAtom
+---------------------------------------------------------------------*/
AP4_VmhdAtom::AP4_VmhdAtom(AP4_UI16 graphics_mode, AP4_UI16 r, AP4_UI16 g, AP4_UI16 b) :
AP4_Atom(AP4_ATOM_TYPE_VMHD, AP4_FULL_ATOM_HEADER_SIZE+8, 0, 1),
m_GraphicsMode(graphics_mode)
{
m_OpColor[0] = r;
m_OpColor[1] = g;
m_OpColor[2] = b;
}
/*----------------------------------------------------------------------
| AP4_VmhdAtom::AP4_VmhdAtom
+---------------------------------------------------------------------*/
AP4_VmhdAtom::AP4_VmhdAtom(AP4_UI32 size,
AP4_UI08 version,
AP4_UI32 flags,
AP4_ByteStream& stream) :
AP4_Atom(AP4_ATOM_TYPE_VMHD, size, version, flags)
{
stream.ReadUI16(m_GraphicsMode);
stream.Read(m_OpColor, sizeof(m_OpColor));
}
/*----------------------------------------------------------------------
| AP4_VmhdAtom::WriteFields
+---------------------------------------------------------------------*/
AP4_Result
AP4_VmhdAtom::WriteFields(AP4_ByteStream& stream)
{
AP4_Result result;
// graphics mode
result = stream.WriteUI16(m_GraphicsMode);
if (AP4_FAILED(result)) return result;
// op color
result = stream.Write(m_OpColor, sizeof(m_OpColor));
if (AP4_FAILED(result)) return result;
return AP4_SUCCESS;
}
/*----------------------------------------------------------------------
| AP4_VmhdAtom::InspectFields
+---------------------------------------------------------------------*/
AP4_Result
AP4_VmhdAtom::InspectFields(AP4_AtomInspector& inspector)
{
inspector.AddField("graphics_mode", m_GraphicsMode);
char formatted[16];
AP4_FormatString(formatted, sizeof(formatted), "%04x,%04x,%04x",
m_OpColor[0], m_OpColor[1], m_OpColor[2]);
inspector.AddField("op_color", formatted);
return AP4_SUCCESS;
}
|
