public Metadata(Mp4Reader reader)
{
reader.moveToBox(eBoxType.moov);
Debug.Assert(1 == reader.level);
movieHeader = default;
List <TrackMetadata> list = new List <TrackMetadata>();
foreach (eBoxType boxType in reader.readChildren())
{
switch (boxType)
{
case eBoxType.mvhd:
movieHeader = new MovieHeader(reader);
break;
case eBoxType.trak:
list.Add(parseTrack(reader, movieHeader.timescale));
break;
default: // e.g. udta, for optional user data.
reader.skipCurrentBox();
break;
}
}
tracks = list.ToArray();
}
public Mp4File(Mp4Reader reader)
{
this.reader = reader;
reader.moveToBox(eBoxType.ftyp);
int cb = checked ((int)reader.remainingBytes);
Span <byte> data = stackalloc byte[cb];
reader.read(data);
List <eFileType> types = new List <eFileType>();
var values = data.cast <uint>();
types.Add((eFileType)values[0]);
minorVersion = (int)BinaryPrimitives.ReverseEndianness(values[1]);
for (int i = 2; i < values.Length; i++)
{
uint v = values[i];
if (v == values[0])
{
continue;
}
if (Enum.IsDefined(typeof(eFileType), v))
{
types.Add((eFileType)v);
}
}
fileType = types.ToArray();
metadata = new Metadata(reader);
findDefaultTracks();
// Fast forward to the movie data; that box has the actual content we gonna play.
// if( reader.currentBox != eBoxType.mdat )
// reader.moveToBox( eBoxType.mdat );
m_videoTrack = new VideoTrack(this);
m_audio = new Audio(this);
}