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|
/*****************************************************************
|
| AP4 - tkhd 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 "Ap4TkhdAtom.h"
#include "Ap4AtomFactory.h"
#include "Ap4Utils.h"
/*----------------------------------------------------------------------
| dynamic cast support
+---------------------------------------------------------------------*/
AP4_DEFINE_DYNAMIC_CAST_ANCHOR(AP4_TkhdAtom)
/*----------------------------------------------------------------------
| AP4_TkhdAtom::Create
+---------------------------------------------------------------------*/
AP4_TkhdAtom*
AP4_TkhdAtom::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 > 1) return NULL;
return new AP4_TkhdAtom(size, version, flags, stream);
}
/*----------------------------------------------------------------------
| AP4_TkhdAtom::AP4_TkhdAtom
+---------------------------------------------------------------------*/
AP4_TkhdAtom::AP4_TkhdAtom(AP4_UI32 creation_time,
AP4_UI32 modification_time,
AP4_UI32 track_id,
AP4_UI64 duration,
AP4_UI16 volume,
AP4_UI32 width,
AP4_UI32 height,
AP4_UI16 layer,
AP4_UI16 alternate_group,
const AP4_SI32* matrix) :
AP4_Atom(AP4_ATOM_TYPE_TKHD, AP4_FULL_ATOM_HEADER_SIZE+80, 0, 0),
m_CreationTime(creation_time),
m_ModificationTime(modification_time),
m_TrackId(track_id),
m_Reserved1(0),
m_Duration(duration),
m_Layer(layer),
m_AlternateGroup(alternate_group),
m_Volume(volume),
m_Reserved3(0),
m_Width(width),
m_Height(height)
{
m_Flags = AP4_TKHD_FLAG_DEFAULTS;
if (matrix) {
for (unsigned int i=0; i<9; i++) {
m_Matrix[i] = matrix[i];
}
} else {
// default matrix
m_Matrix[0] = 0x00010000;
m_Matrix[1] = 0;
m_Matrix[2] = 0;
m_Matrix[3] = 0;
m_Matrix[4] = 0x00010000;
m_Matrix[5] = 0;
m_Matrix[6] = 0;
m_Matrix[7] = 0;
m_Matrix[8] = 0x40000000;
}
m_Reserved2[0] = 0;
m_Reserved2[1] = 0;
if (duration > 0xFFFFFFFF) {
m_Version = 1;
m_Size32 += 12;
}
}
/*----------------------------------------------------------------------
| AP4_TkhdAtom::AP4_TkhdAtom
+---------------------------------------------------------------------*/
AP4_TkhdAtom::AP4_TkhdAtom(AP4_UI32 size,
AP4_UI08 version,
AP4_UI32 flags,
AP4_ByteStream& stream) :
AP4_Atom(AP4_ATOM_TYPE_TKHD, size, version, flags)
{
if (m_Version == 0) {
// we only deal with version 0 for now
AP4_UI32 creation_time;
stream.ReadUI32(creation_time);
m_CreationTime = creation_time;
AP4_UI32 modification_time;
stream.ReadUI32(modification_time);
m_ModificationTime = modification_time;
stream.ReadUI32(m_TrackId);
stream.ReadUI32(m_Reserved1);
AP4_UI32 duration;
stream.ReadUI32(duration);
m_Duration = duration;
} else {
stream.ReadUI64(m_CreationTime);
stream.ReadUI64(m_ModificationTime);
stream.ReadUI32(m_TrackId);
stream.ReadUI32(m_Reserved1);
stream.ReadUI64(m_Duration);
}
stream.Read((void*)m_Reserved2, 8);
stream.ReadUI16(m_Layer);
stream.ReadUI16(m_AlternateGroup);
stream.ReadUI16(m_Volume);
stream.ReadUI16(m_Reserved3);
for (int i=0; i<9; i++) {
AP4_UI32 coefficient = 0;
stream.ReadUI32(coefficient);
m_Matrix[i] = (AP4_SI32)coefficient;
}
stream.ReadUI32(m_Width);
stream.ReadUI32(m_Height);
}
/*----------------------------------------------------------------------
| AP4_TkhdAtom::WriteFields
+---------------------------------------------------------------------*/
AP4_Result
AP4_TkhdAtom::WriteFields(AP4_ByteStream& stream)
{
AP4_Result result;
// creation/modification time, track id, reserved1 & duration
if (m_Version == 0) {
result = stream.WriteUI32((AP4_UI32)m_CreationTime);
if (AP4_FAILED(result)) return result;
result = stream.WriteUI32((AP4_UI32)m_ModificationTime);
if (AP4_FAILED(result)) return result;
result = stream.WriteUI32(m_TrackId);
if (AP4_FAILED(result)) return result;
result = stream.WriteUI32(m_Reserved1);
if (AP4_FAILED(result)) return result;
result = stream.WriteUI32((AP4_UI32)m_Duration);
if (AP4_FAILED(result)) return result;
} else {
result = stream.WriteUI64(m_CreationTime);
if (AP4_FAILED(result)) return result;
result = stream.WriteUI64(m_ModificationTime);
if (AP4_FAILED(result)) return result;
result = stream.WriteUI32(m_TrackId);
if (AP4_FAILED(result)) return result;
result = stream.WriteUI32(m_Reserved1);
if (AP4_FAILED(result)) return result;
result = stream.WriteUI64(m_Duration);
if (AP4_FAILED(result)) return result;
}
// reserved2
result = stream.Write(m_Reserved2, sizeof(m_Reserved2));
if (AP4_FAILED(result)) return result;
// layer, alternate group & volume
result = stream.WriteUI16(m_Layer);
if (AP4_FAILED(result)) return result;
result = stream.WriteUI16(m_AlternateGroup);
if (AP4_FAILED(result)) return result;
result = stream.WriteUI16(m_Volume);
if (AP4_FAILED(result)) return result;
// reserved3
result = stream.WriteUI16(m_Reserved3);
if (AP4_FAILED(result)) return result;
// matrix
for (int i=0; i<9; i++) {
result = stream.WriteUI32(m_Matrix[i]);
if (AP4_FAILED(result)) return result;
}
// width & height
result = stream.WriteUI32(m_Width);
if (AP4_FAILED(result)) return result;
result = stream.WriteUI32(m_Height);
if (AP4_FAILED(result)) return result;
return result;
}
/*----------------------------------------------------------------------
| AP4_TkhdAtom::InspectFields
+---------------------------------------------------------------------*/
AP4_Result
AP4_TkhdAtom::InspectFields(AP4_AtomInspector& inspector)
{
inspector.AddField("enabled", ((m_Flags & AP4_TKHD_FLAG_TRACK_ENABLED) ? 1 : 0), AP4_AtomInspector::HINT_BOOLEAN);
inspector.AddField("id", m_TrackId);
inspector.AddField("duration", m_Duration);
if (inspector.GetVerbosity() > 0) {
inspector.AddField("volume", m_Volume);
inspector.AddField("layer", m_Layer);
inspector.AddField("alternate_group", m_AlternateGroup);
inspector.AddFieldF("matrix_0", (float)m_Matrix[0]/65536.0f);
inspector.AddFieldF("matrix_1", (float)m_Matrix[1]/65536.0f);
inspector.AddFieldF("matrix_2", (float)m_Matrix[2]/65536.0f);
inspector.AddFieldF("matrix_3", (float)m_Matrix[3]/65536.0f);
inspector.AddFieldF("matrix_4", (float)m_Matrix[4]/65536.0f);
inspector.AddFieldF("matrix_5", (float)m_Matrix[5]/65536.0f);
inspector.AddFieldF("matrix_6", (float)m_Matrix[6]/65536.0f);
inspector.AddFieldF("matrix_7", (float)m_Matrix[7]/65536.0f);
inspector.AddFieldF("matrix_8", (float)m_Matrix[8]/65536.0f);
}
inspector.AddFieldF("width", (float)m_Width/65536.0f);
inspector.AddFieldF("height", (float)m_Height/65536.0f);
return AP4_SUCCESS;
}
|
