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|
/*****************************************************************
|
| AP4 - Atom Factory
|
| Copyright 2002-2012 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 "Ap4Types.h"
#include "Ap4Utils.h"
#include "Ap4AtomFactory.h"
#include "Ap4SampleEntry.h"
#include "Ap4UuidAtom.h"
#include "Ap4IsmaCryp.h"
#include "Ap4UrlAtom.h"
#include "Ap4MoovAtom.h"
#include "Ap4MvhdAtom.h"
#include "Ap4MehdAtom.h"
#include "Ap4MfhdAtom.h"
#include "Ap4TfhdAtom.h"
#include "Ap4TrunAtom.h"
#include "Ap4TrakAtom.h"
#include "Ap4HdlrAtom.h"
#include "Ap4DrefAtom.h"
#include "Ap4TkhdAtom.h"
#include "Ap4TrexAtom.h"
#include "Ap4TfhdAtom.h"
#include "Ap4MdhdAtom.h"
#include "Ap4StsdAtom.h"
#include "Ap4StscAtom.h"
#include "Ap4StcoAtom.h"
#include "Ap4Co64Atom.h"
#include "Ap4StszAtom.h"
#include "Ap4Stz2Atom.h"
#include "Ap4IodsAtom.h"
#include "Ap4EsdsAtom.h"
#include "Ap4SttsAtom.h"
#include "Ap4CttsAtom.h"
#include "Ap4StssAtom.h"
#include "Ap4FtypAtom.h"
#include "Ap4VmhdAtom.h"
#include "Ap4SmhdAtom.h"
#include "Ap4NmhdAtom.h"
#include "Ap4SthdAtom.h"
#include "Ap4HmhdAtom.h"
#include "Ap4ElstAtom.h"
#include "Ap4SchmAtom.h"
#include "Ap4FrmaAtom.h"
#include "Ap4TimsAtom.h"
#include "Ap4RtpAtom.h"
#include "Ap4SdpAtom.h"
#include "Ap4IkmsAtom.h"
#include "Ap4IsfmAtom.h"
#include "Ap4IsltAtom.h"
#include "Ap4OdheAtom.h"
#include "Ap4OhdrAtom.h"
#include "Ap4OddaAtom.h"
#include "Ap4TrefTypeAtom.h"
#include "Ap4MetaData.h"
#include "Ap4IproAtom.h"
#include "Ap4OdafAtom.h"
#include "Ap4GrpiAtom.h"
#include "Ap4AvccAtom.h"
#include "Ap4HvccAtom.h"
#include "Ap4Marlin.h"
#include "Ap48bdlAtom.h"
#include "Ap4Piff.h"
#include "Ap4TfraAtom.h"
#include "Ap4MfroAtom.h"
#include "Ap4TfdtAtom.h"
#include "Ap4TencAtom.h"
#include "Ap4SencAtom.h"
#include "Ap4SaioAtom.h"
#include "Ap4SaizAtom.h"
#include "Ap4PdinAtom.h"
#include "Ap4BlocAtom.h"
#include "Ap4AinfAtom.h"
#include "Ap4PsshAtom.h"
#include "Ap4Dec3Atom.h"
#include "Ap4Dac3Atom.h"
#include "Ap4SidxAtom.h"
#include "Ap4SbgpAtom.h"
#include "Ap4SgpdAtom.h"
#include "Ap4TrafAtom.h"
#include "Ap4VpcCAtom.h"
/*----------------------------------------------------------------------
| AP4_AtomFactory::~AP4_AtomFactory
+---------------------------------------------------------------------*/
AP4_AtomFactory::~AP4_AtomFactory()
{
m_TypeHandlers.DeleteReferences();
}
/*----------------------------------------------------------------------
| AP4_AtomFactory::AddTypeHandler
+---------------------------------------------------------------------*/
AP4_Result
AP4_AtomFactory::AddTypeHandler(TypeHandler* handler)
{
return m_TypeHandlers.Add(handler);
}
/*----------------------------------------------------------------------
| AP4_AtomFactory::RemoveTypeHandler
+---------------------------------------------------------------------*/
AP4_Result
AP4_AtomFactory::RemoveTypeHandler(TypeHandler* handler)
{
return m_TypeHandlers.Remove(handler);
}
/*----------------------------------------------------------------------
| AP4_AtomFactory::CreateAtomFromStream
+---------------------------------------------------------------------*/
AP4_Result
AP4_AtomFactory::CreateAtomFromStream(AP4_ByteStream& stream,
AP4_Atom*& atom)
{
AP4_LargeSize stream_size = 0;
AP4_Position stream_position = 0;
AP4_LargeSize bytes_available = (AP4_LargeSize)(-1);
if (AP4_SUCCEEDED(stream.GetSize(stream_size)) &&
stream_size != 0 &&
AP4_SUCCEEDED(stream.Tell(stream_position)) &&
stream_position <= stream_size) {
bytes_available = stream_size-stream_position;
}
return CreateAtomFromStream(stream, bytes_available, atom);
}
/*----------------------------------------------------------------------
| AP4_AtomFactory::CreateAtomFromStream
+---------------------------------------------------------------------*/
AP4_Result
AP4_AtomFactory::CreateAtomFromStream(AP4_ByteStream& stream,
AP4_LargeSize& bytes_available,
AP4_Atom*& atom)
{
AP4_Result result;
// NULL by default
atom = NULL;
// check that there are enough bytes for at least a header
if (bytes_available < 8) return AP4_ERROR_EOS;
// remember current stream offset
AP4_Position start;
stream.Tell(start);
// read atom size
AP4_UI32 size_32;
result = stream.ReadUI32(size_32);
if (AP4_FAILED(result)) {
stream.Seek(start);
return result;
}
AP4_UI64 size = size_32;
// read atom type
AP4_Atom::Type type;
result = stream.ReadUI32(type);
if (AP4_FAILED(result)) {
stream.Seek(start);
return result;
}
// handle special size values
bool atom_is_large = false;
bool force_64 = false;
if (size == 0) {
// atom extends to end of file
AP4_LargeSize stream_size = 0;
stream.GetSize(stream_size);
if (stream_size >= start) {
size = stream_size - start;
}
} else if (size == 1) {
// 64-bit size
atom_is_large = true;
if (bytes_available < 16) {
stream.Seek(start);
return AP4_ERROR_INVALID_FORMAT;
}
stream.ReadUI64(size);
if (size <= 0xFFFFFFFF) {
force_64 = true;
}
}
// check the size
if ((size > 0 && size < 8) || size > bytes_available) {
stream.Seek(start);
return AP4_ERROR_INVALID_FORMAT;
}
// create the atom
result = CreateAtomFromStream(stream, type, size_32, size, atom);
if (AP4_FAILED(result)) return result;
// if we failed to create an atom, use a generic version
if (atom == NULL) {
unsigned int payload_offset = 8;
if (atom_is_large) payload_offset += 8;
stream.Seek(start+payload_offset);
atom = new AP4_UnknownAtom(type, size, stream);
}
// special case: if the atom is poorly encoded and has a 64-bit
// size header but an actual size that fits on 32-bit, adjust the
// object to reflect that.
if (force_64) {
atom->SetSize32(1);
atom->SetSize64(size);
}
// adjust the available size
bytes_available -= size;
// skip to the end of the atom
result = stream.Seek(start+size);
if (AP4_FAILED(result)) {
delete atom;
atom = NULL;
return result;
}
return AP4_SUCCESS;
}
/*----------------------------------------------------------------------
| AP4_AtomFactory::CreateAtomFromStream
+---------------------------------------------------------------------*/
AP4_Result
AP4_AtomFactory::CreateAtomFromStream(AP4_ByteStream& stream,
AP4_UI32 type,
AP4_UI32 size_32,
AP4_UI64 size_64,
AP4_Atom*& atom)
{
bool atom_is_large = (size_32 == 1);
bool force_64 = (size_32==1 && ((size_64>>32) == 0));
// create the atom
if (GetContext() == AP4_ATOM_TYPE_STSD) {
// sample entry
if (atom_is_large) return AP4_ERROR_INVALID_FORMAT;
switch (type) {
case AP4_ATOM_TYPE_MP4A:
atom = new AP4_Mp4aSampleEntry(size_32, stream, *this);
break;
case AP4_ATOM_TYPE_MP4V:
atom = new AP4_Mp4vSampleEntry(size_32, stream, *this);
break;
case AP4_ATOM_TYPE_MP4S:
atom = new AP4_Mp4sSampleEntry(size_32, stream, *this);
break;
case AP4_ATOM_TYPE_ENCA:
atom = new AP4_EncaSampleEntry(size_32, stream, *this);
break;
case AP4_ATOM_TYPE_ENCV:
atom = new AP4_EncvSampleEntry(size_32, stream, *this);
break;
case AP4_ATOM_TYPE_DRMS:
atom = new AP4_DrmsSampleEntry(size_32, stream, *this);
break;
case AP4_ATOM_TYPE_DRMI:
atom = new AP4_DrmiSampleEntry(size_32, stream, *this);
break;
case AP4_ATOM_TYPE_AVC1:
case AP4_ATOM_TYPE_AVC2:
case AP4_ATOM_TYPE_AVC3:
case AP4_ATOM_TYPE_AVC4:
atom = new AP4_AvcSampleEntry(type, size_32, stream, *this);
break;
case AP4_ATOM_TYPE_HEV1:
case AP4_ATOM_TYPE_HVC1:
atom = new AP4_HevcSampleEntry(type, size_32, stream, *this);
break;
case AP4_ATOM_TYPE_ALAC:
case AP4_ATOM_TYPE_AC_3:
case AP4_ATOM_TYPE_EC_3:
case AP4_ATOM_TYPE_DTSC:
case AP4_ATOM_TYPE_DTSH:
case AP4_ATOM_TYPE_DTSL:
case AP4_ATOM_TYPE_DTSE:
atom = new AP4_AudioSampleEntry(type, size_32, stream, *this);
break;
case AP4_ATOM_TYPE_RTP_:
atom = new AP4_RtpHintSampleEntry(size_32, stream, *this);
break;
case AP4_ATOM_TYPE_STPP:
atom = new AP4_SubtitleSampleEntry(type, size_32, stream, *this);
break;
default: {
// try all the external type handlers
AP4_List<TypeHandler>::Item* handler_item = m_TypeHandlers.FirstItem();
while (handler_item) {
TypeHandler* handler = handler_item->GetData();
if (AP4_SUCCEEDED(handler->CreateAtom(type, size_32, stream, GetContext(), atom))) {
break;
}
handler_item = handler_item->GetNext();
}
// no custom handler, create a generic entry
if (atom == NULL) {
atom = new AP4_UnknownSampleEntry(type, (AP4_UI32)size_64, stream);
}
break;
}
}
} else {
// regular atom
switch (type) {
case AP4_ATOM_TYPE_MOOV:
if (atom_is_large) return AP4_ERROR_INVALID_FORMAT;
atom = AP4_MoovAtom::Create(size_32, stream, *this);
break;
case AP4_ATOM_TYPE_MVHD:
if (atom_is_large) return AP4_ERROR_INVALID_FORMAT;
atom = AP4_MvhdAtom::Create(size_32, stream);
break;
case AP4_ATOM_TYPE_MEHD:
if (atom_is_large) return AP4_ERROR_INVALID_FORMAT;
atom = AP4_MehdAtom::Create(size_32, stream);
break;
case AP4_ATOM_TYPE_MFHD:
if (atom_is_large) return AP4_ERROR_INVALID_FORMAT;
atom = AP4_MfhdAtom::Create(size_32, stream);
break;
case AP4_ATOM_TYPE_TRAK:
if (atom_is_large) return AP4_ERROR_INVALID_FORMAT;
atom = AP4_TrakAtom::Create(size_32, stream, *this);
break;
case AP4_ATOM_TYPE_TREX:
if (atom_is_large) return AP4_ERROR_INVALID_FORMAT;
atom = AP4_TrexAtom::Create(size_32, stream);
break;
case AP4_ATOM_TYPE_HDLR:
if (atom_is_large) return AP4_ERROR_INVALID_FORMAT;
atom = AP4_HdlrAtom::Create(size_32, stream);
break;
case AP4_ATOM_TYPE_TKHD:
if (atom_is_large) return AP4_ERROR_INVALID_FORMAT;
atom = AP4_TkhdAtom::Create(size_32, stream);
break;
case AP4_ATOM_TYPE_TFHD:
if (atom_is_large) return AP4_ERROR_INVALID_FORMAT;
atom = AP4_TfhdAtom::Create(size_32, stream);
break;
case AP4_ATOM_TYPE_TRUN:
if (atom_is_large) return AP4_ERROR_INVALID_FORMAT;
atom = AP4_TrunAtom::Create(size_32, stream);
break;
case AP4_ATOM_TYPE_TFRA:
if (atom_is_large) return AP4_ERROR_INVALID_FORMAT;
atom = AP4_TfraAtom::Create(size_32, stream);
break;
case AP4_ATOM_TYPE_MFRO:
if (atom_is_large) return AP4_ERROR_INVALID_FORMAT;
atom = AP4_MfroAtom::Create(size_32, stream);
break;
case AP4_ATOM_TYPE_MDHD:
if (atom_is_large) return AP4_ERROR_INVALID_FORMAT;
atom = AP4_MdhdAtom::Create(size_32, stream);
break;
case AP4_ATOM_TYPE_STSD:
if (atom_is_large) return AP4_ERROR_INVALID_FORMAT;
atom = AP4_StsdAtom::Create(size_32, stream, *this);
break;
case AP4_ATOM_TYPE_STSC:
if (atom_is_large) return AP4_ERROR_INVALID_FORMAT;
atom = AP4_StscAtom::Create(size_32, stream);
break;
case AP4_ATOM_TYPE_STCO:
if (atom_is_large) return AP4_ERROR_INVALID_FORMAT;
atom = AP4_StcoAtom::Create(size_32, stream);
break;
case AP4_ATOM_TYPE_CO64:
if (atom_is_large) return AP4_ERROR_INVALID_FORMAT;
atom = AP4_Co64Atom::Create(size_32, stream);
break;
case AP4_ATOM_TYPE_STSZ:
if (atom_is_large) return AP4_ERROR_INVALID_FORMAT;
atom = AP4_StszAtom::Create(size_32, stream);
break;
case AP4_ATOM_TYPE_STZ2:
if (atom_is_large) return AP4_ERROR_INVALID_FORMAT;
atom = AP4_Stz2Atom::Create(size_32, stream);
break;
case AP4_ATOM_TYPE_STTS:
if (atom_is_large) return AP4_ERROR_INVALID_FORMAT;
atom = AP4_SttsAtom::Create(size_32, stream);
break;
case AP4_ATOM_TYPE_CTTS:
if (atom_is_large) return AP4_ERROR_INVALID_FORMAT;
atom = AP4_CttsAtom::Create(size_32, stream);
break;
case AP4_ATOM_TYPE_STSS:
if (atom_is_large) return AP4_ERROR_INVALID_FORMAT;
atom = AP4_StssAtom::Create(size_32, stream);
break;
case AP4_ATOM_TYPE_IODS:
if (atom_is_large) return AP4_ERROR_INVALID_FORMAT;
atom = AP4_IodsAtom::Create(size_32, stream);
break;
case AP4_ATOM_TYPE_ESDS:
if (atom_is_large) return AP4_ERROR_INVALID_FORMAT;
atom = AP4_EsdsAtom::Create(size_32, stream);
break;
case AP4_ATOM_TYPE_AVCC:
if (atom_is_large) return AP4_ERROR_INVALID_FORMAT;
atom = AP4_AvccAtom::Create(size_32, stream);
break;
case AP4_ATOM_TYPE_HVCC:
if (atom_is_large) return AP4_ERROR_INVALID_FORMAT;
atom = AP4_HvccAtom::Create(size_32, stream);
break;
#if !defined(AP4_CONFIG_MINI_BUILD)
case AP4_ATOM_TYPE_UUID: {
AP4_UI08 uuid[16];
AP4_Result result = stream.Read(uuid, 16);
if (AP4_FAILED(result)) return result;
if (AP4_CompareMemory(uuid, AP4_UUID_PIFF_TRACK_ENCRYPTION_ATOM, 16) == 0) {
atom = AP4_PiffTrackEncryptionAtom::Create((AP4_UI32)size_64, stream);
} else if (AP4_CompareMemory(uuid, AP4_UUID_PIFF_SAMPLE_ENCRYPTION_ATOM, 16) == 0) {
atom = AP4_PiffSampleEncryptionAtom::Create((AP4_UI32)size_64, stream);
} else {
atom = new AP4_UnknownUuidAtom(size_64, uuid, stream);
}
break;
}
case AP4_ATOM_TYPE_8ID_:
atom = new AP4_NullTerminatedStringAtom(type, size_64, stream);
break;
case AP4_ATOM_TYPE_8BDL:
if (atom_is_large) return AP4_ERROR_INVALID_FORMAT;
atom = AP4_8bdlAtom::Create(size_32, stream);
break;
case AP4_ATOM_TYPE_DREF:
if (atom_is_large) return AP4_ERROR_INVALID_FORMAT;
atom = AP4_DrefAtom::Create(size_32, stream, *this);
break;
case AP4_ATOM_TYPE_URL:
if (atom_is_large) return AP4_ERROR_INVALID_FORMAT;
atom = AP4_UrlAtom::Create(size_32, stream);
break;
case AP4_ATOM_TYPE_ELST:
if (atom_is_large) return AP4_ERROR_INVALID_FORMAT;
atom = AP4_ElstAtom::Create(size_32, stream);
break;
case AP4_ATOM_TYPE_VMHD:
if (atom_is_large) return AP4_ERROR_INVALID_FORMAT;
atom = AP4_VmhdAtom::Create(size_32, stream);
break;
case AP4_ATOM_TYPE_SMHD:
if (atom_is_large) return AP4_ERROR_INVALID_FORMAT;
atom = AP4_SmhdAtom::Create(size_32, stream);
break;
case AP4_ATOM_TYPE_NMHD:
if (atom_is_large) return AP4_ERROR_INVALID_FORMAT;
atom = AP4_NmhdAtom::Create(size_32, stream);
break;
case AP4_ATOM_TYPE_STHD:
if (atom_is_large) return AP4_ERROR_INVALID_FORMAT;
atom = AP4_SthdAtom::Create(size_32, stream);
break;
case AP4_ATOM_TYPE_HMHD:
if (atom_is_large) return AP4_ERROR_INVALID_FORMAT;
atom = AP4_HmhdAtom::Create(size_32, stream);
break;
case AP4_ATOM_TYPE_FRMA:
if (atom_is_large) return AP4_ERROR_INVALID_FORMAT;
atom = AP4_FrmaAtom::Create(size_32, stream);
break;
case AP4_ATOM_TYPE_SCHM:
if (atom_is_large) return AP4_ERROR_INVALID_FORMAT;
atom = AP4_SchmAtom::Create(size_32, &m_ContextStack, stream);
break;
case AP4_ATOM_TYPE_FTYP:
if (atom_is_large) return AP4_ERROR_INVALID_FORMAT;
atom = AP4_FtypAtom::Create(size_32, stream);
break;
case AP4_ATOM_TYPE_TIMS:
if (atom_is_large) return AP4_ERROR_INVALID_FORMAT;
atom = AP4_TimsAtom::Create(size_32, stream);
break;
case AP4_ATOM_TYPE_SDP_:
if (atom_is_large) return AP4_ERROR_INVALID_FORMAT;
atom = AP4_SdpAtom::Create(size_32, stream);
break;
case AP4_ATOM_TYPE_IKMS:
if (atom_is_large) return AP4_ERROR_INVALID_FORMAT;
atom = AP4_IkmsAtom::Create(size_32, stream);
break;
case AP4_ATOM_TYPE_ISFM:
if (atom_is_large) return AP4_ERROR_INVALID_FORMAT;
atom = AP4_IsfmAtom::Create(size_32, stream);
break;
case AP4_ATOM_TYPE_ISLT:
if (atom_is_large) return AP4_ERROR_INVALID_FORMAT;
atom = AP4_IsltAtom::Create(size_32, stream);
break;
case AP4_ATOM_TYPE_ODHE:
if (atom_is_large) return AP4_ERROR_INVALID_FORMAT;
atom = AP4_OdheAtom::Create(size_32, stream, *this);
break;
case AP4_ATOM_TYPE_OHDR:
if (atom_is_large) return AP4_ERROR_INVALID_FORMAT;
atom = AP4_OhdrAtom::Create(size_32, stream, *this);
break;
case AP4_ATOM_TYPE_ODDA:
atom = AP4_OddaAtom::Create(size_64, stream);
break;
case AP4_ATOM_TYPE_ODAF:
if (atom_is_large) return AP4_ERROR_INVALID_FORMAT;
atom = AP4_OdafAtom::Create(size_32, stream);
break;
case AP4_ATOM_TYPE_GRPI:
if (atom_is_large) return AP4_ERROR_INVALID_FORMAT;
atom = AP4_GrpiAtom::Create(size_32, stream);
break;
case AP4_ATOM_TYPE_IPRO:
if (atom_is_large) return AP4_ERROR_INVALID_FORMAT;
atom = AP4_IproAtom::Create(size_32, stream, *this);
break;
case AP4_ATOM_TYPE_RTP_:
if (atom_is_large) return AP4_ERROR_INVALID_FORMAT;
atom = AP4_RtpAtom::Create(size_32, stream);
break;
case AP4_ATOM_TYPE_TFDT:
if (atom_is_large) return AP4_ERROR_INVALID_FORMAT;
atom = AP4_TfdtAtom::Create(size_32, stream);
break;
case AP4_ATOM_TYPE_TENC:
if (atom_is_large) return AP4_ERROR_INVALID_FORMAT;
atom = AP4_TencAtom::Create(size_32, stream);
break;
case AP4_ATOM_TYPE_SENC:
if (atom_is_large) return AP4_ERROR_INVALID_FORMAT;
atom = AP4_SencAtom::Create(size_32, stream);
break;
case AP4_ATOM_TYPE_SAIZ:
if (atom_is_large) return AP4_ERROR_INVALID_FORMAT;
atom = AP4_SaizAtom::Create(size_32, stream);
break;
case AP4_ATOM_TYPE_SAIO:
if (atom_is_large) return AP4_ERROR_INVALID_FORMAT;
atom = AP4_SaioAtom::Create(size_32, stream);
break;
case AP4_ATOM_TYPE_PDIN:
if (atom_is_large) return AP4_ERROR_INVALID_FORMAT;
atom = AP4_PdinAtom::Create(size_32, stream);
break;
case AP4_ATOM_TYPE_BLOC:
if (atom_is_large) return AP4_ERROR_INVALID_FORMAT;
atom = AP4_BlocAtom::Create(size_32, stream);
break;
case AP4_ATOM_TYPE_AINF:
if (atom_is_large) return AP4_ERROR_INVALID_FORMAT;
atom = AP4_AinfAtom::Create(size_32, stream);
break;
case AP4_ATOM_TYPE_PSSH:
if (atom_is_large) return AP4_ERROR_INVALID_FORMAT;
atom = AP4_PsshAtom::Create(size_32, stream);
break;
case AP4_ATOM_TYPE_SIDX:
if (atom_is_large) return AP4_ERROR_INVALID_FORMAT;
atom = AP4_SidxAtom::Create(size_32, stream);
break;
case AP4_ATOM_TYPE_SBGP:
if (atom_is_large) return AP4_ERROR_INVALID_FORMAT;
atom = AP4_SbgpAtom::Create(size_32, stream);
break;
case AP4_ATOM_TYPE_SGPD:
if (atom_is_large) return AP4_ERROR_INVALID_FORMAT;
atom = AP4_SgpdAtom::Create(size_32, stream);
break;
case AP4_ATOM_TYPE_VPCC:
if (atom_is_large) return AP4_ERROR_INVALID_FORMAT;
atom = AP4_VpcCAtom::Create(size_32, stream);
break;
case AP4_ATOM_TYPE_MKID:
if (atom_is_large) return AP4_ERROR_INVALID_FORMAT;
if (GetContext() == AP4_ATOM_TYPE_MARL) {
atom = AP4_MkidAtom::Create(size_32, stream);
}
break;
case AP4_ATOM_TYPE_DAC3:
if (atom_is_large) return AP4_ERROR_INVALID_FORMAT;
if (GetContext() == AP4_ATOM_TYPE_AC_3) {
atom = AP4_Dac3Atom::Create(size_32, stream);
}
break;
case AP4_ATOM_TYPE_DEC3:
if (atom_is_large) return AP4_ERROR_INVALID_FORMAT;
if (GetContext() == AP4_ATOM_TYPE_EC_3) {
atom = AP4_Dec3Atom::Create(size_32, stream);
}
break;
case AP4_ATOM_TYPE_TRAF:
if (atom_is_large) return AP4_ERROR_INVALID_FORMAT;
atom = AP4_TrafAtom::Create(type, size_64, force_64, stream, *this);
break;
// track ref types
case AP4_ATOM_TYPE_HINT:
case AP4_ATOM_TYPE_CDSC:
case AP4_ATOM_TYPE_SYNC:
case AP4_ATOM_TYPE_MPOD:
case AP4_ATOM_TYPE_DPND:
case AP4_ATOM_TYPE_IPIR:
case AP4_ATOM_TYPE_ALIS:
case AP4_ATOM_TYPE_CHAP:
if (GetContext() == AP4_ATOM_TYPE_TREF) {
if (atom_is_large) return AP4_ERROR_INVALID_FORMAT;
atom = AP4_TrefTypeAtom::Create(type, size_32, stream);
}
break;
#endif // AP4_CONFIG_MINI_BUILD
// container atoms
case AP4_ATOM_TYPE_MOOF:
case AP4_ATOM_TYPE_MVEX:
case AP4_ATOM_TYPE_TREF:
case AP4_ATOM_TYPE_MFRA:
case AP4_ATOM_TYPE_HNTI:
case AP4_ATOM_TYPE_STBL:
case AP4_ATOM_TYPE_MDIA:
case AP4_ATOM_TYPE_DINF:
case AP4_ATOM_TYPE_MINF:
case AP4_ATOM_TYPE_SCHI:
case AP4_ATOM_TYPE_SINF:
case AP4_ATOM_TYPE_UDTA:
case AP4_ATOM_TYPE_ILST:
case AP4_ATOM_TYPE_EDTS:
case AP4_ATOM_TYPE_MDRI:
case AP4_ATOM_TYPE_WAVE:
if (atom_is_large) return AP4_ERROR_INVALID_FORMAT;
atom = AP4_ContainerAtom::Create(type, size_64, false, force_64, stream, *this);
break;
// containers, only at the top
case AP4_ATOM_TYPE_MARL:
if (GetContext() == 0) {
atom = AP4_ContainerAtom::Create(type, size_64, false, force_64, stream, *this);
}
break;
// full container atoms
case AP4_ATOM_TYPE_META:
case AP4_ATOM_TYPE_ODRM:
case AP4_ATOM_TYPE_ODKM:
atom = AP4_ContainerAtom::Create(type, size_64, true, force_64, stream, *this);
break;
case AP4_ATOM_TYPE_FREE:
case AP4_ATOM_TYPE_WIDE:
case AP4_ATOM_TYPE_MDAT:
// generic atoms
break;
default: {
// try all the external type handlers
AP4_List<TypeHandler>::Item* handler_item = m_TypeHandlers.FirstItem();
while (handler_item) {
TypeHandler* handler = handler_item->GetData();
if (AP4_SUCCEEDED(handler->CreateAtom(type, size_32, stream, GetContext(), atom))) {
break;
}
handler_item = handler_item->GetNext();
}
break;
}
}
}
return AP4_SUCCESS;
}
/*----------------------------------------------------------------------
| AP4_AtomFactory::CreateAtomsFromStream
+---------------------------------------------------------------------*/
AP4_Result
AP4_AtomFactory::CreateAtomsFromStream(AP4_ByteStream& stream,
AP4_AtomParent& atoms)
{
AP4_LargeSize stream_size = 0;
AP4_Position stream_position = 0;
AP4_LargeSize bytes_available = (AP4_LargeSize)(-1);
if (AP4_SUCCEEDED(stream.GetSize(stream_size)) &&
stream_size != 0 &&
AP4_SUCCEEDED(stream.Tell(stream_position)) &&
stream_position <= stream_size) {
bytes_available = stream_size-stream_position;
}
return CreateAtomsFromStream(stream, bytes_available, atoms);
}
/*----------------------------------------------------------------------
| AP4_AtomFactory::CreateAtomsFromStream
+---------------------------------------------------------------------*/
AP4_Result
AP4_AtomFactory::CreateAtomsFromStream(AP4_ByteStream& stream,
AP4_LargeSize bytes_available,
AP4_AtomParent& atoms)
{
AP4_Result result;
do {
AP4_Atom* atom = NULL;
result = CreateAtomFromStream(stream, bytes_available, atom);
if (AP4_SUCCEEDED(result) && atom != NULL) {
atoms.AddChild(atom);
}
} while (AP4_SUCCEEDED(result));
return AP4_SUCCESS;
}
/*----------------------------------------------------------------------
| AP4_AtomFactory::PushContext
+---------------------------------------------------------------------*/
void
AP4_AtomFactory::PushContext(AP4_Atom::Type context)
{
m_ContextStack.Append(context);
}
/*----------------------------------------------------------------------
| AP4_AtomFactory::PopContext
+---------------------------------------------------------------------*/
void
AP4_AtomFactory::PopContext()
{
m_ContextStack.RemoveLast();
}
/*----------------------------------------------------------------------
| AP4_AtomFactory::GetContext
+---------------------------------------------------------------------*/
AP4_Atom::Type
AP4_AtomFactory::GetContext(AP4_Ordinal depth)
{
AP4_Ordinal available = m_ContextStack.ItemCount();
if (depth >= available) return 0;
return m_ContextStack[available-depth-1];
}
/*----------------------------------------------------------------------
| AP4_DefaultAtomFactory::Instance
+---------------------------------------------------------------------*/
AP4_DefaultAtomFactory AP4_DefaultAtomFactory::Instance;
/*----------------------------------------------------------------------
| AP4_DefaultAtomFactory::Instance
+---------------------------------------------------------------------*/
AP4_DefaultAtomFactory::AP4_DefaultAtomFactory()
{
Initialize();
}
/*----------------------------------------------------------------------
| AP4_DefaultAtomFactory::Initialize
+---------------------------------------------------------------------*/
AP4_Result
AP4_DefaultAtomFactory::Initialize()
{
// register built-in type handlers
AP4_Result result = AddTypeHandler(new AP4_MetaDataAtomTypeHandler(this));
if (AP4_SUCCEEDED(result)) m_Initialized = true;
return result;
}
|
