public BaseAtom ReadAtom(IBoxContainer parentAtom)
{
BaseAtom atom = null;
uint type = 0;
var currentPos = MediaFile.Position;
long size = MediaFile.Br.ReadUInt32();
if (size == 0)
{
atom = new AtomNULL(this, type, size, currentPos) {Parent = parentAtom};
return atom;
}
type = MediaFile.Br.ReadUInt32();
if (size == 1)
{
size = MediaFile.Br.ReadInt64();
if (size == 0)
{
atom = new AtomNULL(this, type, size, currentPos) { Parent = parentAtom };
return atom;
}
}
switch (type)
{
case FTYP:
atom = new AtomFTYP(this, size, currentPos);
break;
case MOOV:
atom = new AtomMOOV(this, type, size, currentPos);
break;
case MOOF:
atom = new AtomMOOF(this, type, size, currentPos);
break;
case MVEX:
atom = new AtomMVEX(this, type, size, currentPos);
break;
case MVHD:
atom = new AtomMVHD(this, type, size, currentPos);
break;
case MFHD:
atom = new AtomMFHD(this, type, size, currentPos);
break;
case TRAK:
atom = new AtomTRAK(this, type, size, currentPos);
break;
case TRAF:
atom = new AtomTRAF(this, type, size, currentPos);
break;
case TREX:
atom = new AtomTREX(this, type, size, currentPos);
break;
case TRUN:
atom = new AtomTRUN(this, type, size, currentPos);
break;
case TKHD:
atom = new AtomTKHD(this, type, size, currentPos);
break;
case TFHD:
atom = new AtomTFHD(this, type, size, currentPos);
break;
case MDIA:
atom = new AtomMDIA(this, type, size, currentPos);
break;
case MDHD:
atom = new AtomMdhd(this, type, size, currentPos);
break;
case HDLR:
atom = new AtomHdlr(this, type, size, currentPos);
break;
case MINF:
atom = new AtomMINF(this, type, size, currentPos);
break;
case SMHD:
atom = new AtomSMHD(this, type, size, currentPos);
break;
case DINF:
atom = new AtomDINF(this, type, size, currentPos);
break;
case STBL:
atom = new AtomSTBL(this, type, size, currentPos);
break;
case VMHD:
atom = new AtomVMHD(this, type, size, currentPos);
break;
case DREF:
atom = new AtomDREF(this, type, size, currentPos);
break;
case STSD:
atom = new AtomSTSD(this, type, size, currentPos);
break;
case STTS:
atom = new AtomSTTS(this, type, size, currentPos);
break;
case STSC:
atom = new AtomSTSC(this, type, size, currentPos);
break;
case STSZ:
atom = new AtomSTSZ(this, type, size, currentPos);
break;
case STCO:
atom = new AtomSTCO(this, type, size, currentPos);
break;
case CTTS:
atom = new AtomCTTS(this, type, size, currentPos);
break;
case STSS:
atom = new AtomSTSS(this, type, size, currentPos);
break;
case URL:
atom = new AtomURL(this, type, size, currentPos);
break;
case MP4A:
atom = new AtomMP4A(this, type, size, currentPos);
break;
case AVC1:
atom = new AtomAVC1(this, type, size, currentPos);
break;
case ESDS:
atom = new AtomESDS(this, type, size, currentPos);
break;
case AVCC:
atom = new AtomAVCC(this, type, size, currentPos);
break;
case UDTA:
atom = new AtomUDTA(this, type, size, currentPos);
break;
case WAVE:
atom = new AtomWAVE(this, type, size, currentPos);
break;
case META:
atom = new AtomMETA(this, type, size, currentPos);
break;
case NULL:
atom = new AtomNULL(this, type, size, currentPos);
break;
case ILST:
atom = new AtomILST(this, type, size, currentPos);
break;
case DATA:
atom = new AtomDATA(this, type, size, currentPos);
break;
case CO64:
atom = new AtomCO64(this, type, size, currentPos);
break;
case _COM:
case NAME:
case COVR:
case AART:
case _WRT:
case _GRP:
case _LYR:
case _NAM:
case _ART1:
case _ART2:
case _PRT:
case _TOO:
case _DAY:
case _CMT:
case _CPY:
case _DES:
case _ALB:
case TRKN:
case CPIL:
case PGAP:
case TMPO:
case GNRE:
case DISK:
case _GEN:
case DESC:
case TVSH:
case TVEN:
case TVSN:
case TVES:
atom = new AtomMetaField(this, type, size, currentPos);
break;
default:
{
atom = new IgnoredAtom(this, type, size, currentPos);
break;
}
}
atom.Parent = parentAtom;
atom.Read();
if (currentPos + atom.Size != MediaFile.Position)
{
FATAL("atom start:{0};Atom Size:{1};currentPostion:{2}",currentPos,atom.Size,MediaFile.Position);
}
return atom;
}
protected override bool ParseDocument()
{
if (!MediaFile.SeekBegin())
{
FATAL("Unable to seek to the beginning of file");
return false;
}
while (MediaFile.DataStream.CanRead)
{
if (MediaFile.Position == MediaFile.DataStream.Length)
{
return true;
}
var atom = ReadAtom(null);
if (atom == null)
{
FATAL("Unable to read atom");
return false;
}
if (!atom.IsIgnored)
{
switch (atom.Type)
{
case FTYP:
_atomFTYP = (AtomFTYP) atom;
break;
case MOOV:
_atomMOOV = (AtomMOOV) atom;
break;
case MOOF:
_moof.Add((AtomMOOF)atom);
break;
default:
return false;
}
}
_topAtoms.Add(atom);
}
return true;
}