public ISMVideoTrack(ISMVTrackFormat videoFile, ISMVStream stream)
{
base.TrackFormat = videoFile; // sets payload type and other properties also
ParentStream = stream;
// set other properties of this track
}
public ISMAudioTrack(ISMVTrackFormat audioFile, ISMVStream stream)
{
base.TrackFormat = audioFile; // this sets the PayloadType and other properties also
ParentStream = stream;
// set other properties
}
public ISMAudioTrack(ISMVTrackFormat audioFile, ISMVStream stream)
{
base.TrackFormat = audioFile; // this sets the PayloadType and other properties also
ParentStream = stream;
// set other properties
}
public ISMVideoTrack(ISMVTrackFormat videoFile, ISMVStream stream)
{
base.TrackFormat = videoFile; // sets payload type and other properties also
ParentStream = stream;
// set other properties of this track
}
public override void Read()
{
// With Microsoft's ISM, we don't need to read the MP4 headers to figure out how many tracks there are;
// we already know at this point because both the .ism and .ismc files have been scanned.
foreach (GenericMediaTrack track in MediaTracks)
{
ISMVTrackFormat trackFormat = track.TrackFormat as ISMVTrackFormat;
trackFormat.Read();
}
}
public override void WriteSamples(IEnumerable <Slice> slices, CodecTypes codecType)
{
GenericMediaTrack track = (GenericMediaTrack)this[codecType, 0];
ISMVTrackFormat format = (ISMVTrackFormat)track.TrackFormat;
format.CurrentFragment.Write(m_writer);
format.CurrentFragment.CheckFilePosition(m_writer);
foreach (Slice sample in slices)
{
m_writer.Write(sample.SliceBytes, 0, sample.SliceBytes.Length);
}
format.CurrentFragment = null; // release
}
public override Slice GetSample(StreamDataBlockInfo SampleInfo)
{
Slice ans = new Slice();
ans.SliceBytes = new byte[SampleInfo.SliceSize];
//ParentStream.EnterMutex();
ISMVTrackFormat ismvFormat = TrackFormat as ISMVTrackFormat;
ismvFormat.boxReader.BaseStream.Position = (long)SampleInfo.StreamOffset; // if this GetSample call follows another one, file should be in position
ismvFormat.boxReader.BaseStream.Read(ans.SliceBytes, 0, SampleInfo.SliceSize);
//ParentStream.LeaveMutex();
ans.Copy(SampleInfo);
return(ans);
}
public override string ToString()
{
const string endXML = @"</MP4Stream>";
StringBuilder xml = new StringBuilder();
xml.Append(base.ToString());
xml.Remove(xml.Length - endXML.Length, endXML.Length); // remove </MP4Stream>
foreach (GenericMediaTrack track in this.MediaTracks)
{
ISMVTrackFormat format = (ISMVTrackFormat)track.TrackFormat;
if (format.CurrentFragment != null)
{
format.CurrentFragment.ToString(); // we can also print track.Fragments, but it can get very, very long
}
}
xml.Append(endXML);
return(xml.ToString());
}
