mirror of
https://github.com/axiomatic-systems/Bento4.git
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245 lines
8.8 KiB
C++
245 lines
8.8 KiB
C++
/*****************************************************************
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| AP4 - tkhd Atoms
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| Copyright 2002-2008 Axiomatic Systems, LLC
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| This file is part of Bento4/AP4 (MP4 Atom Processing Library).
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| Unless you have obtained Bento4 under a difference license,
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| this version of Bento4 is Bento4|GPL.
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| Bento4|GPL is free software; you can redistribute it and/or modify
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| it under the terms of the GNU General Public License as published by
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| the Free Software Foundation; either version 2, or (at your option)
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| any later version.
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| Bento4|GPL is distributed in the hope that it will be useful,
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| but WITHOUT ANY WARRANTY; without even the implied warranty of
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| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| GNU General Public License for more details.
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| You should have received a copy of the GNU General Public License
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| along with Bento4|GPL; see the file COPYING. If not, write to the
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| Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA
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| 02111-1307, USA.
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****************************************************************/
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/*----------------------------------------------------------------------
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| includes
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+---------------------------------------------------------------------*/
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#include "Ap4TkhdAtom.h"
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#include "Ap4AtomFactory.h"
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#include "Ap4Utils.h"
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/*----------------------------------------------------------------------
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| dynamic cast support
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+---------------------------------------------------------------------*/
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AP4_DEFINE_DYNAMIC_CAST_ANCHOR(AP4_TkhdAtom)
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/*----------------------------------------------------------------------
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| AP4_TkhdAtom::Create
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+---------------------------------------------------------------------*/
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AP4_TkhdAtom*
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AP4_TkhdAtom::Create(AP4_Size size, AP4_ByteStream& stream)
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{
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AP4_UI08 version;
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AP4_UI32 flags;
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if (size < AP4_FULL_ATOM_HEADER_SIZE) return NULL;
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if (AP4_FAILED(AP4_Atom::ReadFullHeader(stream, version, flags))) return NULL;
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if (version > 1) return NULL;
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return new AP4_TkhdAtom(size, version, flags, stream);
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}
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/*----------------------------------------------------------------------
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| AP4_TkhdAtom::AP4_TkhdAtom
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+---------------------------------------------------------------------*/
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AP4_TkhdAtom::AP4_TkhdAtom(AP4_UI32 creation_time,
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AP4_UI32 modification_time,
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AP4_UI32 track_id,
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AP4_UI64 duration,
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AP4_UI16 volume,
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AP4_UI32 width,
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AP4_UI32 height,
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AP4_UI16 layer,
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AP4_UI16 alternate_group,
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const AP4_SI32* matrix) :
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AP4_Atom(AP4_ATOM_TYPE_TKHD, AP4_FULL_ATOM_HEADER_SIZE+80, 0, 0),
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m_CreationTime(creation_time),
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m_ModificationTime(modification_time),
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m_TrackId(track_id),
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m_Reserved1(0),
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m_Duration(duration),
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m_Layer(layer),
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m_AlternateGroup(alternate_group),
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m_Volume(volume),
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m_Reserved3(0),
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m_Width(width),
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m_Height(height)
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{
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m_Flags = AP4_TKHD_FLAG_DEFAULTS;
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if (matrix) {
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for (unsigned int i=0; i<9; i++) {
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m_Matrix[i] = matrix[i];
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}
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} else {
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// default matrix
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m_Matrix[0] = 0x00010000;
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m_Matrix[1] = 0;
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m_Matrix[2] = 0;
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m_Matrix[3] = 0;
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m_Matrix[4] = 0x00010000;
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m_Matrix[5] = 0;
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m_Matrix[6] = 0;
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m_Matrix[7] = 0;
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m_Matrix[8] = 0x40000000;
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}
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m_Reserved2[0] = 0;
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m_Reserved2[1] = 0;
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if (duration > 0xFFFFFFFF) {
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m_Version = 1;
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m_Size32 += 12;
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}
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}
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/*----------------------------------------------------------------------
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| AP4_TkhdAtom::AP4_TkhdAtom
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+---------------------------------------------------------------------*/
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AP4_TkhdAtom::AP4_TkhdAtom(AP4_UI32 size,
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AP4_UI08 version,
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AP4_UI32 flags,
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AP4_ByteStream& stream) :
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AP4_Atom(AP4_ATOM_TYPE_TKHD, size, version, flags)
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{
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if (m_Version == 0) {
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// we only deal with version 0 for now
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AP4_UI32 creation_time;
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stream.ReadUI32(creation_time);
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m_CreationTime = creation_time;
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AP4_UI32 modification_time;
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stream.ReadUI32(modification_time);
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m_ModificationTime = modification_time;
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stream.ReadUI32(m_TrackId);
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stream.ReadUI32(m_Reserved1);
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AP4_UI32 duration;
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stream.ReadUI32(duration);
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m_Duration = duration;
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} else {
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stream.ReadUI64(m_CreationTime);
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stream.ReadUI64(m_ModificationTime);
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stream.ReadUI32(m_TrackId);
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stream.ReadUI32(m_Reserved1);
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stream.ReadUI64(m_Duration);
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}
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stream.Read((void*)m_Reserved2, 8);
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stream.ReadUI16(m_Layer);
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stream.ReadUI16(m_AlternateGroup);
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stream.ReadUI16(m_Volume);
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stream.ReadUI16(m_Reserved3);
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for (int i=0; i<9; i++) {
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AP4_UI32 coefficient = 0;
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stream.ReadUI32(coefficient);
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m_Matrix[i] = (AP4_SI32)coefficient;
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}
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stream.ReadUI32(m_Width);
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stream.ReadUI32(m_Height);
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}
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/*----------------------------------------------------------------------
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| AP4_TkhdAtom::WriteFields
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+---------------------------------------------------------------------*/
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AP4_Result
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AP4_TkhdAtom::WriteFields(AP4_ByteStream& stream)
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{
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AP4_Result result;
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// creation/modification time, track id, reserved1 & duration
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if (m_Version == 0) {
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result = stream.WriteUI32((AP4_UI32)m_CreationTime);
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if (AP4_FAILED(result)) return result;
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result = stream.WriteUI32((AP4_UI32)m_ModificationTime);
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if (AP4_FAILED(result)) return result;
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result = stream.WriteUI32(m_TrackId);
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if (AP4_FAILED(result)) return result;
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result = stream.WriteUI32(m_Reserved1);
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if (AP4_FAILED(result)) return result;
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result = stream.WriteUI32((AP4_UI32)m_Duration);
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if (AP4_FAILED(result)) return result;
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} else {
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result = stream.WriteUI64(m_CreationTime);
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if (AP4_FAILED(result)) return result;
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result = stream.WriteUI64(m_ModificationTime);
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if (AP4_FAILED(result)) return result;
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result = stream.WriteUI32(m_TrackId);
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if (AP4_FAILED(result)) return result;
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result = stream.WriteUI32(m_Reserved1);
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if (AP4_FAILED(result)) return result;
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result = stream.WriteUI64(m_Duration);
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if (AP4_FAILED(result)) return result;
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}
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// reserved2
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result = stream.Write(m_Reserved2, sizeof(m_Reserved2));
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if (AP4_FAILED(result)) return result;
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// layer, alternate group & volume
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result = stream.WriteUI16(m_Layer);
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if (AP4_FAILED(result)) return result;
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result = stream.WriteUI16(m_AlternateGroup);
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if (AP4_FAILED(result)) return result;
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result = stream.WriteUI16(m_Volume);
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if (AP4_FAILED(result)) return result;
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// reserved3
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result = stream.WriteUI16(m_Reserved3);
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if (AP4_FAILED(result)) return result;
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// matrix
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for (int i=0; i<9; i++) {
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result = stream.WriteUI32(m_Matrix[i]);
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if (AP4_FAILED(result)) return result;
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}
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// width & height
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result = stream.WriteUI32(m_Width);
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if (AP4_FAILED(result)) return result;
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result = stream.WriteUI32(m_Height);
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if (AP4_FAILED(result)) return result;
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return result;
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}
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/*----------------------------------------------------------------------
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| AP4_TkhdAtom::InspectFields
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+---------------------------------------------------------------------*/
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AP4_Result
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AP4_TkhdAtom::InspectFields(AP4_AtomInspector& inspector)
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{
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inspector.AddField("enabled", ((m_Flags & AP4_TKHD_FLAG_TRACK_ENABLED) ? 1 : 0), AP4_AtomInspector::HINT_BOOLEAN);
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inspector.AddField("id", m_TrackId);
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inspector.AddField("duration", m_Duration);
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if (inspector.GetVerbosity() > 0) {
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inspector.AddField("volume", m_Volume);
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inspector.AddField("layer", m_Layer);
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inspector.AddField("alternate_group", m_AlternateGroup);
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inspector.AddFieldF("matrix_0", (float)m_Matrix[0]/65536.0f);
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inspector.AddFieldF("matrix_1", (float)m_Matrix[1]/65536.0f);
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inspector.AddFieldF("matrix_2", (float)m_Matrix[2]/65536.0f);
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inspector.AddFieldF("matrix_3", (float)m_Matrix[3]/65536.0f);
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inspector.AddFieldF("matrix_4", (float)m_Matrix[4]/65536.0f);
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inspector.AddFieldF("matrix_5", (float)m_Matrix[5]/65536.0f);
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inspector.AddFieldF("matrix_6", (float)m_Matrix[6]/65536.0f);
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inspector.AddFieldF("matrix_7", (float)m_Matrix[7]/65536.0f);
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inspector.AddFieldF("matrix_8", (float)m_Matrix[8]/65536.0f);
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}
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inspector.AddFieldF("width", (float)m_Width/65536.0f);
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inspector.AddFieldF("height", (float)m_Height/65536.0f);
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return AP4_SUCCESS;
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}
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