/*----------------------------------------------------------------------
| AP4_AtomFactory::CreateAtomFromStream
+---------------------------------------------------------------------*/
AP4_Result
AP4_AtomFactory::CreateAtomFromStream(AP4_ByteStream& stream,
AP4_Size& bytes_available,
AP4_Atom*& atom,
AP4_Atom* parent)
{
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_Offset start;
stream.Tell(start);
// read atom size
AP4_UI64 size = 0;
result = stream.ReadUI32((AP4_UI32&)size);
if (AP4_FAILED(result)) {
stream.Seek(start);
return result;
}
if (size == 0) {
// atom extends to end of file
AP4_Size streamSize = 0;
stream.GetSize(streamSize);
if (streamSize >= start) {
size = streamSize - start;
}
}
// check the size (we don't handle extended size yet)
if (size != 1 && size < 8 || size > bytes_available) {
stream.Seek(start);
return AP4_ERROR_INVALID_FORMAT;
}
// read atom type
AP4_Atom::Type type;
result = stream.ReadUI32(type);
if (AP4_FAILED(result)) {
stream.Seek(start);
return result;
}
if (size == 1)
{
AP4_UI64 size_high;
result = stream.ReadUI64(size_high);
if (AP4_FAILED(result) ) {
stream.Seek(start);
return AP4_ERROR_INVALID_FORMAT;
}
size = size_high;
}
// create the atom
switch (type) {
case AP4_ATOM_TYPE_MOOV:
atom = DNew AP4_MoovAtom(size, stream, *this);
break;
case AP4_ATOM_TYPE_MVHD:
atom = DNew AP4_MvhdAtom(size, stream);
break;
case AP4_ATOM_TYPE_TRAK:
atom = DNew AP4_TrakAtom(size, stream, *this);
break;
case AP4_ATOM_TYPE_HDLR:
atom = DNew AP4_HdlrAtom(size, stream);
break;
case AP4_ATOM_TYPE_DREF:
atom = DNew AP4_DrefAtom(size, stream, *this);
break;
case AP4_ATOM_TYPE_URL:
atom = DNew AP4_UrlAtom(size, stream);
break;
case AP4_ATOM_TYPE_TKHD:
atom = DNew AP4_TkhdAtom(size, stream);
break;
case AP4_ATOM_TYPE_MDHD:
atom = DNew AP4_MdhdAtom(size, stream);
break;
case AP4_ATOM_TYPE_STSD:
atom = DNew AP4_StsdAtom(size, stream, *this);
break;
case AP4_ATOM_TYPE_STSC:
atom = DNew AP4_StscAtom(size, stream);
break;
case AP4_ATOM_TYPE_STCO:
atom = DNew AP4_StcoAtom(size, stream);
break;
case AP4_ATOM_TYPE_CO64:
atom = DNew AP4_Co64Atom(size, stream);
break;
case AP4_ATOM_TYPE_STSZ:
atom = DNew AP4_StszAtom(size, stream);
break;
case AP4_ATOM_TYPE_STTS:
atom = DNew AP4_SttsAtom(size, stream);
break;
case AP4_ATOM_TYPE_CTTS:
atom = DNew AP4_CttsAtom(size, stream);
break;
case AP4_ATOM_TYPE_STSS:
atom = DNew AP4_StssAtom(size, stream);
break;
case AP4_ATOM_TYPE_MP4S:
atom = DNew AP4_Mp4sSampleEntry(size, stream, *this);
break;
case AP4_ATOM_TYPE_MP4A:
atom = parent && parent->GetType() == AP4_ATOM_TYPE_STSD
? (AP4_Atom*)DNew AP4_Mp4aSampleEntry(size, stream, *this)
: (AP4_Atom*)DNew AP4_UnknownAtom(type, size, false, stream);
break;
case AP4_ATOM_TYPE_MP4V:
atom = DNew AP4_Mp4vSampleEntry(size, stream, *this);
break;
case AP4_ATOM_TYPE_AVC1:
atom = DNew AP4_Avc1SampleEntry(size, stream, *this);
break;
case AP4_ATOM_TYPE_ENCA:
atom = DNew AP4_EncaSampleEntry(size, stream, *this);
break;
case AP4_ATOM_TYPE_ENCV:
atom = DNew AP4_EncvSampleEntry(size, stream, *this);
break;
case AP4_ATOM_TYPE_ESDS:
atom = DNew AP4_EsdsAtom(size, stream);
break;
case AP4_ATOM_TYPE_VMHD:
atom = DNew AP4_VmhdAtom(size, stream);
break;
case AP4_ATOM_TYPE_SMHD:
atom = DNew AP4_SmhdAtom(size, stream);
break;
case AP4_ATOM_TYPE_NMHD:
atom = DNew AP4_NmhdAtom(size, stream);
break;
case AP4_ATOM_TYPE_HMHD:
atom = DNew AP4_HmhdAtom(size, stream);
break;
case AP4_ATOM_TYPE_FRMA:
atom = DNew AP4_FrmaAtom(size, stream);
break;
case AP4_ATOM_TYPE_SCHM:
atom = DNew AP4_SchmAtom(size, stream);
break;
case AP4_ATOM_TYPE_FTYP:
atom = DNew AP4_FtypAtom(size, stream);
break;
case AP4_ATOM_TYPE_RTP:
if (m_Context == AP4_ATOM_TYPE_HNTI) {
atom = DNew AP4_RtpAtom(size, stream);
} else {
atom = DNew AP4_RtpHintSampleEntry(size, stream, *this);
}
break;
case AP4_ATOM_TYPE_TIMS:
atom = DNew AP4_TimsAtom(size, stream);
break;
case AP4_ATOM_TYPE_SDP:
atom = DNew AP4_SdpAtom(size, stream);
break;
case AP4_ATOM_TYPE_IKMS:
atom = DNew AP4_IkmsAtom(size, stream);
break;
case AP4_ATOM_TYPE_ISFM:
atom = DNew AP4_IsfmAtom(size, stream);
break;
case AP4_ATOM_TYPE_HINT:
atom = DNew AP4_TrefTypeAtom(type, size, stream);
break;
// container atoms
case AP4_ATOM_TYPE_TREF:
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_NAM:
case AP4_ATOM_TYPE_ART:
case AP4_ATOM_TYPE_WRT:
case AP4_ATOM_TYPE_ALB:
case AP4_ATOM_TYPE_DAY:
case AP4_ATOM_TYPE_TOO:
case AP4_ATOM_TYPE_CMT:
case AP4_ATOM_TYPE_GEN:
case AP4_ATOM_TYPE_TRKN:
case AP4_ATOM_TYPE_EDTS:
case AP4_ATOM_TYPE_WAVE:
case AP4_ATOM_TYPE_CMOV: {
AP4_UI32 context = m_Context;
m_Context = type; // set the context for the children
atom = DNew AP4_ContainerAtom(type, size, false, stream, *this);
m_Context = context; // restore the previous context
break;
}
// full container atoms
case AP4_ATOM_TYPE_META:
atom = DNew AP4_ContainerAtom(type, size, true, stream, *this);
break;
// other
case AP4_ATOM_TYPE_AVCC:
atom = DNew AP4_AvcCAtom(size, stream);
break;
case AP4_ATOM_TYPE_TEXT:
atom = DNew AP4_TextSampleEntry(size, stream, *this);
break;
case AP4_ATOM_TYPE_TX3G:
atom = DNew AP4_Tx3gSampleEntry(size, stream, *this);
break;
case AP4_ATOM_TYPE_FTAB:
atom = DNew AP4_FtabAtom(size, stream);
break;
case AP4_ATOM_TYPE_CVID:
case AP4_ATOM_TYPE_SVQ1:
case AP4_ATOM_TYPE_SVQ2:
case AP4_ATOM_TYPE_SVQ3:
case AP4_ATOM_TYPE_H261:
case AP4_ATOM_TYPE_H263:
case AP4_ATOM_TYPE_S263:
case AP4_ATOM_TYPE_JPEG:
case AP4_ATOM_TYPE_PNG:
case AP4_ATOM_TYPE_RLE:
case AP4_ATOM_TYPE_MJPA:
case AP4_ATOM_TYPE_MJPB:
case AP4_ATOM_TYPE_RPZA:
case AP4_ATOM_TYPE_DIV3:
case AP4_ATOM_TYPE_DIVX:
case AP4_ATOM_TYPE_8BPS:
case AP4_ATOM_TYPE_3IV1:
case AP4_ATOM_TYPE_3IV2:
case AP4_ATOM_TYPE_IV32:
case AP4_ATOM_TYPE_IV41:
case AP4_ATOM_TYPE_VP31:
case AP4_ATOM_TYPE_YV12:
case AP4_ATOM_TYPE_DVC:
case AP4_ATOM_TYPE_DV5P:
case AP4_ATOM_TYPE_DVCP:
case AP4_ATOM_TYPE_DVPP:
atom = DNew AP4_VisualSampleEntry(type, size, stream, *this);
break;
case AP4_ATOM_TYPE_MJPG:
case AP4_ATOM_TYPE_AVDJ://uncommon fourcc
case AP4_ATOM_TYPE_DMB1://uncommon fourcc
atom = DNew AP4_VisualSampleEntry(AP4_ATOM_TYPE_MJPG, size, stream, *this);
break;
case AP4_ATOM_TYPE_SAMR:
case AP4_ATOM_TYPE__MP3:
case AP4_ATOM_TYPE_IMA4:
case AP4_ATOM_TYPE_QDMC:
case AP4_ATOM_TYPE_QDM2:
case AP4_ATOM_TYPE_NONE:
case AP4_ATOM_TYPE_RAW:
case AP4_ATOM_TYPE_TWOS:
case AP4_ATOM_TYPE_SOWT:
case AP4_ATOM_TYPE_IN24:
case AP4_ATOM_TYPE_IN32:
case AP4_ATOM_TYPE_FL32:
case AP4_ATOM_TYPE_FL64:
case AP4_ATOM_TYPE_LPCM:
case AP4_ATOM_TYPE_ALAW:
case AP4_ATOM_TYPE_ULAW:
case AP4_ATOM_TYPE_NMOS:
case AP4_ATOM_TYPE_ALAC:
atom = DNew AP4_AudioSampleEntry(type, size, stream, *this);
break;
case AP4_ATOM_TYPE__AC3: // AC3-in-MP4 from ISO Standard
case AP4_ATOM_TYPE_SAC3: // AC3-in-MP4 from Nero Stuff >.<
atom = DNew AP4_AC3SampleEntry(size, stream, *this);
break;
case AP4_ATOM_TYPE_EAC3:
atom = DNew AP4_EAC3SampleEntry(size, stream, *this);
break;
case AP4_ATOM_TYPE_CHPL:
atom = DNew AP4_ChplAtom(size, stream);
break;
case AP4_ATOM_TYPE_DATA:
atom = DNew AP4_DataAtom(size, stream);
break;
case AP4_ATOM_TYPE_DCOM:
atom = DNew AP4_DcomAtom(size, stream);
break;
case AP4_ATOM_TYPE_CMVD:
atom = DNew AP4_CmvdAtom(size, stream, *this);
break;
case AP4_ATOM_TYPE_ENDA:
atom = DNew AP4_EndaAtom(size, stream);
break;
case AP4_ATOM_TYPE_PASP:
atom = DNew AP4_PaspAtom(size, stream);
break;
default:
if(parent && parent->GetType() == AP4_ATOM_TYPE_STSD && (type & 0xffff0000) == AP4_ATOM_TYPE('m', 's', 0, 0)) {
atom = DNew AP4_AudioSampleEntry(type, size, stream, *this);
} else {// try all the external type handlers
atom = NULL;
AP4_List<TypeHandler>::Item* handler_item = m_TypeHandlers.FirstItem();
while (handler_item) {
TypeHandler* handler = handler_item->GetData();
if (AP4_SUCCEEDED(handler->CreateAtom(type, size, stream, atom))) {
break;
}
handler_item = handler_item->GetNext();
}
if (atom == NULL) {
// no custom handlers, create a generic atom
atom = DNew AP4_UnknownAtom(type, size, false, stream);
}
}
break;
}
// skip to the end of the atom
bytes_available -= size;
result = stream.Seek(start+size);
if (AP4_FAILED(result)) {
delete atom;
atom = NULL;
}
return result;
}
/*----------------------------------------------------------------------
| AP4_TrakAtom::AP4_TrakAtom
+---------------------------------------------------------------------*/
AP4_TrakAtom::AP4_TrakAtom(AP4_SampleTable* sample_table,
AP4_Atom::Type hdlr_type,
const char* hdlr_name,
AP4_UI32 track_id,
AP4_UI64 creation_time,
AP4_UI64 modification_time,
AP4_UI64 track_duration,
AP4_UI32 media_time_scale,
AP4_UI64 media_duration,
AP4_UI16 volume,
const char* language,
AP4_UI32 width,
AP4_UI32 height) :
AP4_ContainerAtom(AP4_ATOM_TYPE_TRAK)
{
AP4_Result result;
// create a tkhd atom
m_TkhdAtom = DNew AP4_TkhdAtom(creation_time,
modification_time,
track_id,
track_duration,
volume,
width,
height);
// create an edts
// create a mdia atom
AP4_ContainerAtom* mdia = DNew AP4_ContainerAtom(AP4_ATOM_TYPE_MDIA);
// create a hdlr atom for the mdia atom
m_HdlrAtom = DNew AP4_HdlrAtom(hdlr_type, hdlr_name);
// create a minf atom
AP4_ContainerAtom* minf = DNew AP4_ContainerAtom(AP4_ATOM_TYPE_MINF);
// create a media header atom for minf (vmhd, smhd, hmhd or nmhd)
AP4_Atom* minf_header;
switch (hdlr_type) {
case AP4_HANDLER_TYPE_VIDE:
minf_header = DNew AP4_VmhdAtom(0, 0, 0, 0);
break;
case AP4_HANDLER_TYPE_SOUN:
minf_header = DNew AP4_SmhdAtom(0);
break;
default:
minf_header = DNew AP4_NmhdAtom();
break;
}
// create a dinf atom for minf
AP4_ContainerAtom* dinf = DNew AP4_ContainerAtom(AP4_ATOM_TYPE_DINF);
// create a url atom as a ref for dref
AP4_Atom* url = DNew AP4_UrlAtom(); // local ref
// create a dref atom for dinf
AP4_DrefAtom* dref = DNew AP4_DrefAtom(&url, 1);
// create a stbl atom for minf
AP4_ContainerAtom* stbl;
result = sample_table->GenerateStblAtom(stbl);
if (AP4_FAILED(result)) stbl = NULL;
// populate the dinf atom
dinf->AddChild(dref);
// populate the minf atom
minf->AddChild(minf_header);
minf->AddChild(dinf);
if (stbl) minf->AddChild(stbl);
// create a mdhd atom for the mdia atom
AP4_MdhdAtom* mdhd = DNew AP4_MdhdAtom(creation_time,
modification_time,
media_time_scale,
media_duration,
language);
// populate the mdia atom
mdia->AddChild(mdhd);
mdia->AddChild(m_HdlrAtom);
mdia->AddChild(minf);
// attach the children
AddChild(m_TkhdAtom);
AddChild(mdia);
}