public static void CopyTo(MatroskaDocument doc, Stream outputStream, OggOpusAudioStreamDemuxerSettings?settings = null)
{
if (doc == null)
{
throw new ArgumentNullException(nameof(doc));
}
if (doc.Segment.Clusters == null)
{
throw new ArgumentNullException(nameof(doc.Segment.Clusters));
}
if (outputStream == null)
{
throw new ArgumentNullException(nameof(outputStream));
}
settings ??= new OggOpusAudioStreamDemuxerSettings();
var validator = new OggOpusValidator();
validator.ValidateAndThrow((settings, doc));
var opusAudio = doc.Segment.Tracks.TrackEntries.First(t => t.TrackNumber == settings.AudioTrackNumber);
ushort preSkip = GetPreSkipFromCodecPrivate(opusAudio);
var sampleRate = (int)opusAudio.Audio.SamplingFrequency;
var channels = (int)opusAudio.Audio.Channels;
var oggPageWriter = new OggPageWriter(outputStream, settings.AudioStreamSerial);
var oggOpusHeaderWriter = new OggOpusHeaderWriter(oggPageWriter);
// Write OpusHeader (+ OpusTags)
oggOpusHeaderWriter.WriteHeaders(channels, sampleRate, preSkip);
// Loop OggSegments
byte segmentParts = 0;
var oggPageWithSegments = new List <SegmentEntry>();
void WriteOggPageAndResetParts(OggHeaderType oggHeaderType)
{
// Write Ogg Page
oggPageWriter.WriteOggPage(oggHeaderType, segmentParts, oggPageWithSegments);
// Reset data
segmentParts = 0;
oggPageWithSegments.Clear();
}
// Loop SegmentEntries
foreach (var oggSegmentEntry in ConvertClustersToSegmentTable(doc.Segment.Clusters, sampleRate, settings.AudioTrackNumber))
{
oggPageWithSegments.Add(oggSegmentEntry);
segmentParts = (byte)(segmentParts + oggSegmentEntry.SegmentBytes.Length);
if (segmentParts >= settings.MaxSegmentPartsPerOggPage)
{
WriteOggPageAndResetParts(oggPageWithSegments.Any(o => o.IsLast) ? OggHeaderType.EndOfStream : OggHeaderType.None);
}
}
if (segmentParts > 0)
{
WriteOggPageAndResetParts(OggHeaderType.EndOfStream);
}
oggPageWriter.Flush();
}
public OggOpusHeaderWriter(OggPageWriter oggPageWriter)
{
_oggPageWriter = oggPageWriter;
}