internal CodecStream(IDataReader dataReader, IDataBlockBuilder dataBlockBuilder, QtAtom root)
{
if (dataReader == null)
{
throw new ArgumentNullException("dataReader");
}
if (dataBlockBuilder == null)
{
throw new ArgumentNullException("dataBlockBuilder");
}
if (root == null)
{
throw new ArgumentNullException("root");
}
_dataReader = dataReader;
_dataBlockBuilder = dataBlockBuilder;
_root = root;
_moov = _root.FindChild(AtomName.Movie);
_mdat = _root.FindChild(AtomName.MediaData);
_fileOffset = _root.FirstChild.Offset;
if (_mdat == null)
{
_mdatChunk = new Chunk(((QtAtom)_root.GetLastDescendant()).Offset - _fileOffset, 0);
}
else
{
_mdatChunk = new Chunk(_mdat.Offset - _fileOffset + 8, (_mdat.Length - 8));
}
_mdatMaxUnparsedBytes = (uint)QtDetector.Configurable[QtDetector.ConfigurationKey.MediaDateMaxUnparsedBytes];
}
private static string GetExtraDataCodecStreamName(IResultNode headerDataAtom)
{
QtAtom track = FindParentAtom(headerDataAtom, AtomName.Track);
QtAtom sampleDescription = FindParentAtom(headerDataAtom, AtomName.SampleDescription);
return(GetCodecStreamName(track, sampleDescription, true));
}
private T GetRequiredAtom <T>(QtAtom parent, AtomName atomName, bool recursive) where T : QtAtom
{
T atom = (parent == null) ? null : parent.FindChild(atomName, recursive) as T;
if (atom == null)
{
_requiredAtomsMissing = true;
}
return(atom);
}
/// <summary>
/// Locates the handler reference and verifies that the given
/// <paramref name="componentSubType"/> is correct for this
/// sample description.
/// </summary>
/// <param name="componentSubType">the component sub-type</param>
/// <returns>true if the component sub-type is valid, false otherwise</returns>
protected bool CheckComponentSubType(ComponentSubType componentSubType)
{
QtAtom media = FindParent(AtomName.Media);
if (media != null)
{
HandlerReference handlerReference = media.FindChild(AtomName.HandlerReference) as HandlerReference;
if (handlerReference != null && handlerReference.ComponentSubType != componentSubType)
{
return(false);
}
}
return(true);
}
private static string GetCodecStreamName(QtAtom track, QtAtom sampleDescription, bool isPartial)
{
var sb = new StringBuilder();
if (track != null)
{
// Report the track ID
var trackHeader = track.FindChild(AtomName.TrackHeader) as TrackHeader;
if (trackHeader != null)
{
sb.AppendFormat(CultureInfo.CurrentCulture, "Track {0}", trackHeader.TrackID);
}
if (isPartial)
{
sb.Append(" [Partial]");
}
// Report the handler type (audio/video) and the handler component name
var handlerReference = track.FindChild(AtomName.HandlerReference, true) as HandlerReference;
if (handlerReference != null)
{
sb.AppendFormat(CultureInfo.CurrentCulture, ", {0}", handlerReference.ComponentSubType);
if (!string.IsNullOrEmpty(handlerReference.ComponentName))
{
sb.AppendFormat(CultureInfo.CurrentCulture, ", {0}", handlerReference.ComponentName);
}
}
}
else if (isPartial)
{
sb.Append("[Partial]");
}
// Report the codec name + description
if ((sampleDescription != null) && sampleDescription.HasChildren())
{
string typeName = Enum.GetName(typeof(QtAtom.Attribute), QtAtom.Attribute.Type);
string dataFormat = sampleDescription.Children[0].FindAttributeByName(typeName).ValueAsString;
if (!string.IsNullOrEmpty(dataFormat))
{
sb.AppendFormat(CultureInfo.CurrentCulture, ", {0}", dataFormat);
sb.AppendDescriptiveCodecName(dataFormat);
}
}
return(sb.ToString());
}
internal TrackData(QtAtom track, Chunk mdatChunk, long fileOffset)
{
_track = track;
_mdatChunk = mdatChunk;
_fileOffset = fileOffset;
_buffer = new byte[8];
_sampleTable = GetRequiredAtom <QtAtom>(track, AtomName.SampleTable, true);
_handlerReference = GetRequiredAtom <HandlerReference>(track, AtomName.HandlerReference, true);
_sampleDescription = GetRequiredAtom <SampleDescription>(_sampleTable, AtomName.SampleDescription);
_chunkOffset = GetRequiredAtom <ChunkOffset>(_sampleTable, AtomName.ChunkOffset);
_sampleSize = GetRequiredAtom <SampleSize>(_sampleTable, AtomName.SampleSize);
_sampleToChunk = GetRequiredAtom <SampleToChunk>(_sampleTable, AtomName.SampleToChunk);
_chunks = new List <Chunk>();
_validators = new List <VideoSampleValidator> {
IsValidH264Sample, IsValidMpeg4Sample, IsValidH263Sample
};
_validatorsToRemove = new List <VideoSampleValidator>();
FirstSampleOffset = long.MaxValue;
LastSampleEndOffset = long.MinValue;
}
public ElementaryStreamDescriptor(QtAtom previousHeader)
: base(previousHeader, AtomName.ElementaryStreamDescriptor)
{
}
public ClippingRegion(QtAtom previousHeader)
: base(previousHeader, AtomName.ClippingRegion)
{
}
public override bool IsSuitableParent(QtAtom parent)
{
// File type should always be the first atom
return(parent.IsRoot && !parent.HasChildren());
}
public FileType(QtAtom previousHeader)
: base(previousHeader, AtomName.FileType)
{
}
public DataReferenceEntry(QtAtom previousHeader)
: base(previousHeader, AtomName.DataReferenceEntry)
{
}
public MetaData(QtAtom previousHeader)
: base(previousHeader, AtomName.MetaData)
{
}
protected SampleEntry(QtAtom previousHeader, AtomName atomName)
: base(previousHeader, atomName)
{
}
public QtSampleDescriptionAtom(QtAtom previousHeader, AtomName atomName)
: base(previousHeader, atomName)
{
Debug.Assert(atomName.IsFlagSet(AtomFlags.SizeAndType) && !atomName.IsFlagSet(AtomFlags.VersionAndFlags));
}
public TimeCodeSampleDescription(QtAtom previousHeader)
: base(previousHeader, AtomName.TimeCodeSampleDescription)
{
}
public ColorParameter(QtAtom previousHeader)
: base(previousHeader, AtomName.ColorParameter)
{
}
public AvcConfigurationBox(QtAtom previousHeader)
: base(previousHeader, AtomName.AvcConfigurationBox)
{
}
public override bool IsSuitableParent(QtAtom parent)
{
return(!parent.HasChildren() || parent.LastChild.HeaderName != AtomName.Wide);
}
/// <summary>
/// Creates a new wide atom.
/// </summary>
/// <param name="previousHeader">the header that directly precedes the wide atom</param>
public Wide(QtAtom previousHeader)
: base(previousHeader, AtomName.Wide)
{
}
public Profile(QtAtom previousHeader)
: base(previousHeader, AtomName.Profile)
{
}
public AvcLayerEntry(QtAtom previousHeader)
: base(previousHeader, AtomName.AvcLayerEntry)
{
}
public TimeToSample(QtAtom previousHeader)
: base(previousHeader, AtomName.TimeToSample)
{
}
protected SampleGroupDescriptionEntry(QtAtom previousHeader, AtomName atomName)
: base(previousHeader, atomName)
{
}
public SampleSize(QtAtom previousHeader)
: base(previousHeader, AtomName.SampleSize)
{
}
public SyncSample(QtAtom previousHeader)
: base(previousHeader, AtomName.SyncSample)
{
}
public ChunkOffset(QtAtom previousHeader, AtomType atomType)
: base(previousHeader, AtomName.ChunkOffset)
{
_atomType = atomType;
}
public EditList(QtAtom previousHeader)
: base(previousHeader, AtomName.EditList)
{
}
public SampleToGroupBox(QtAtom previousHeader)
: base(previousHeader, AtomName.SampleToGroupBox)
{
}
public AvcSubSequenceEntry(QtAtom previousHeader)
: base(previousHeader, AtomName.AvcSubSequenceEntry)
{
}
public TrackHeader(QtAtom previousHeader)
: base(previousHeader, AtomName.TrackHeader)
{
}