/// <summary>
/// Gets a fragment of track data from the file that is being streamed locally.
/// </summary>
/// <param name="trackType">The type of track being requested (video, audio, text)</param>
/// <param name="bitrate">The bitrate of the track that should be returned.</param>
/// <param name="timeOffset">The time offset of the fragment of data being requested.</param>
/// <param name="language">The ISO language code of the track if there is one.</param>
/// <param name="callback">The callback that will be invoked when the fragment has been retrieved.
/// The callback will have the stream to the data.</param>
/// <remarks>The fragment that will be returned will be a moof and mdat pair of boxes from the file.</remarks>
public override async Task <WebRequestorResponse> GetTrackFragmentStream(ManifestTrackType trackType, uint bitrate, ulong timeOffset, string language)
{
if (language == string.Empty)
{
language = null;
}
var track = this.ManifestTracks
.Where(t => t.Type == trackType && t.Bitrate == bitrate && t.Language == language)
.SingleOrDefault();
if (track != null)
{
var entry = track.Fragments.TrackFragmentRandomAccessEntries.FirstOrDefault(e => e.Time == timeOffset);
if (entry != null)
{
ulong moofSize = 0;
ulong mdatSize = 0;
long moofOffset = 0;
using (var fileStream = await StorageFile.OpenStreamForReadAsync())
{
var reader = new BoxBinaryReader(fileStream);
moofOffset = (long)entry.MoofOffset;
reader.BaseStream.Seek(moofOffset, SeekOrigin.Begin);
moofSize = this.ReadBoxSize(reader);
// Run to the end of the moof to get to its mdat box
reader.BaseStream.Seek(moofOffset + (long)moofSize, SeekOrigin.Begin);
mdatSize = this.ReadBoxSize(reader);
// And back to the beginning of the moof so we can read both boxes into the stream
reader.BaseStream.Seek(moofOffset, SeekOrigin.Begin);
var size = moofSize + mdatSize;
var fragment = reader.ReadBytes((int)size);
var stream = new MemoryStream(fragment);
return(new WebRequestorResponse(stream, System.Net.HttpStatusCode.OK, null, string.Empty));
}
}
}
throw new WebRequestorFailure(System.Net.HttpStatusCode.NotFound, null);
}
/// <summary>
/// Gets a fragment of track data from the file that is being streamed locally.
/// </summary>
/// <param name="trackType">The type of track being requested (video, audio, text)</param>
/// <param name="bitrate">The bitrate of the track that should be returned.</param>
/// <param name="timeOffset">The time offset of the fragment of data being requested.</param>
/// <param name="language">The ISO language code of the track if there is one.</param>
/// <param name="callback">The callback that will be invoked when the fragment has been retrieved.
/// The callback will have the stream to the data.</param>
/// <remarks>The fragment that will be returned will be a moof and mdat pair of boxes from the file.</remarks>
public override async Task<WebRequestorResponse> GetTrackFragmentStream(ManifestTrackType trackType, uint bitrate, ulong timeOffset, string language)
{
if (language == string.Empty) language = null;
var track = this.ManifestTracks
.Where(t => t.Type == trackType && t.Bitrate == bitrate && t.Language == language)
.SingleOrDefault();
if (track != null)
{
var entry = track.Fragments.TrackFragmentRandomAccessEntries.FirstOrDefault(e => e.Time == timeOffset);
if (entry != null)
{
ulong moofSize = 0;
ulong mdatSize = 0;
long moofOffset = 0;
using (var fileStream = await StorageFile.OpenStreamForReadAsync())
{
var reader = new BoxBinaryReader(fileStream);
moofOffset = (long)entry.MoofOffset;
reader.BaseStream.Seek(moofOffset, SeekOrigin.Begin);
moofSize = this.ReadBoxSize(reader);
// Run to the end of the moof to get to its mdat box
reader.BaseStream.Seek(moofOffset + (long)moofSize, SeekOrigin.Begin);
mdatSize = this.ReadBoxSize(reader);
// And back to the beginning of the moof so we can read both boxes into the stream
reader.BaseStream.Seek(moofOffset, SeekOrigin.Begin);
var size = moofSize + mdatSize;
var fragment = reader.ReadBytes((int)size);
var stream = new MemoryStream(fragment);
return new WebRequestorResponse(stream, System.Net.HttpStatusCode.OK, null, string.Empty);
}
}
}
throw new WebRequestorFailure(System.Net.HttpStatusCode.NotFound, null);
}
