private static uint CalculateBitrate(SegmentIndexBox sidx)
{
var trackSize = sidx.Subsegments.Sum(subsegment => (long)subsegment.ReferencedSize); // Track size in bits
var trackDuration = sidx.Subsegments.Sum(subsegment => (long)subsegment.Duration); // Track duration
var bitrate = ((double)(trackSize * 8) / (double)trackDuration) * (double)sidx.Timescale;
return((uint)bitrate);
}
private static IEnumerable <SmoothStreamingMediaStreamIndexC> CreateChunks(SegmentIndexBox sidx)
{
int i = 0;
foreach (var subsegment in sidx.Subsegments)
{
var c = new SmoothStreamingMediaStreamIndexC();
if (i == 0)
{
c.t = sidx.EarliestPresentationTime;
}
c.n = i;
c.d = subsegment.Duration;
//c.d = ConvertTimeToTimescale(track.Duration, mvhd.TimeScale, track.TimeScale) - entriesDuration;
yield return(c);
}
}
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++;
}
}
