/// <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);
}
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;
}