private static IEnumerable <KeyValuePair <string, ChunkLocation> > GetChunkLookups(SmoothStreamingMediaStreamIndex streamIndex, SmoothStreamingMediaStreamIndexQualityLevel track, Uri chunkUri, SegmentIndexBox sidx)
{
int i = 0;
ulong byteOffset = sidx.FirstOffset;
ulong timeOffset = 0;
foreach (var c in streamIndex.c)
{
var subsegment = sidx.Subsegments[i];
// create a lookup table for each chunk
var key = "/" + streamIndex.Url
.Replace("{bitrate}", track.Bitrate.ToString())
.Replace("{start time}", timeOffset.ToString());
var location = new ChunkLocation()
{
Uri = chunkUri,
From = byteOffset,
To = byteOffset += subsegment.ReferencedSize
};
yield return(new KeyValuePair <string, ChunkLocation>(key, location));
timeOffset += subsegment.Duration;
i++;
}
}
private async Task <WebRequestorResponse> GetChunkAsync(Uri source, CancellationToken c)
{
if (ChunkLookup != null && ChunkLookup.Any())
{
var key = source.AbsolutePath;
if (ChunkLookup.ContainsKey(key))
{
ChunkLocation chunkLocation = ChunkLookup[key];
if (ChunkRequested != null)
{
ChunkRequested(this, new ChunkRequestedEventArgs(source, chunkLocation.Uri, string.Format("{0}-{1}", chunkLocation.From, chunkLocation.To)));
}
return(await DownloadResolvedChunkAsync(source, chunkLocation, c));
}
}
if (ChunkRequested != null)
{
ChunkRequested(this, new ChunkRequestedEventArgs(source, source, null));
}
#if SILVERLIGHT // SILVERLIGHT requires that we download the chunk
return(await WebRequestor.GetResponseAsync(source));
#else
return(null);
#endif
}
private static IEnumerable<KeyValuePair<string, ChunkLocation>> GetChunkLookups(SmoothStreamingMediaStreamIndex streamIndex, SmoothStreamingMediaStreamIndexQualityLevel track, Uri chunkUri, SegmentIndexBox sidx)
{
int i = 0;
ulong byteOffset = sidx.FirstOffset;
ulong timeOffset = 0;
foreach (var c in streamIndex.c)
{
var subsegment = sidx.Subsegments[i];
// create a lookup table for each chunk
var key = "/" + streamIndex.Url
.Replace("{bitrate}", track.Bitrate.ToString())
.Replace("{start time}", timeOffset.ToString());
var location = new ChunkLocation()
{
Uri = chunkUri,
From = byteOffset,
To = byteOffset += subsegment.ReferencedSize
};
yield return new KeyValuePair<string, ChunkLocation>(key, location);
timeOffset += subsegment.Duration;
i++;
}
}
private static async Task<WebRequestorResponse> DownloadResolvedChunkAsync(Uri source, ChunkLocation chunkLocation, CancellationToken c)
{
// download the chunk and keep the stream open
return await WebRequestor.GetResponseAsync(chunkLocation.Uri, (long)chunkLocation.From, (long)chunkLocation.To);
}
private static async Task <WebRequestorResponse> DownloadResolvedChunkAsync(Uri source, ChunkLocation chunkLocation, CancellationToken c)
{
// download the chunk and keep the stream open
return(await WebRequestor.GetResponseAsync(chunkLocation.Uri, (long)chunkLocation.From, (long)chunkLocation.To));
}
