/// <summary>
/// Reads the header boxes for the video, which includes
/// ftyp, pdin, bloc, moov, and the optional mdat.
/// </summary>
/// <param name="callback"></param>
private async Task ReadMovieHeaderBoxes()
{
var moov = await this.GetBox(BoxType.Moov);
this.Boxes.Add(moov);
// See if we have an mdat next and grab it if we do
var stream = await WebRequestor.GetStreamRangeAsync(this.fileUri, this.fileOffset, this.fileOffset + 8);
using (var reader = new BoxBinaryReader(stream))
{
if (reader.PeekNextBoxType() == BoxType.Mdat)
{
var mdat = await this.GetNextBox();
this.Boxes.Add(mdat);
}
}
}
/// <summary>
/// Opens a local (offline) file and initializes the CFF data that can be used for
/// manifest generation.
/// </summary>
/// <param name="path">The file URI of the resource to be opened. i.e. ms-appx:////Big_Buck_Bunny.uvu </param>
public override async Task Parse(Uri path)
{
if (StorageFile == null)
{
StorageFile = await Windows.Storage.StorageFile.GetFileFromApplicationUriAsync(path);
}
using (var fileStream = await StorageFile.OpenStreamForReadAsync())
{
var reader = new BoxBinaryReader(fileStream);
Box box = null;
do
{
box = reader.ReadNextBox();
if (box != null)
{
this.Boxes.Add(box);
if (box.Type == BoxType.Moov)
{
// There may be an mdat after the moov, if so parse it
if (reader.PeekNextBoxType() == BoxType.Mdat)
{
box = reader.ReadNextBox();
this.Boxes.Add(box);
}
// After parsing the moov and optional mdat after it, skip to the mfra
// this will jump past the moof and mdats which we don't need to process
reader.GotoMovieFragmentRandomAccess();
}
}
} while (box != null);
}
this.InitializeTrackRegistry();
}
