private string GetCodecStreamName(byte streamNumber, StreamPropertiesObject streamProperty, CodecListObject codecList)
{
StringBuilder codecStreamName = new StringBuilder();
codecStreamName.AppendFormat(CultureInfo.CurrentCulture, "Stream {0}", streamNumber);
if (streamProperty != null) // No stream property ASF-object found
{
// The Stream Type
codecStreamName.AppendFormat(CultureInfo.CurrentCulture, ", {0}", Enum.GetName(typeof(ObjectStreamTypeGuid), streamProperty.StreamType));
// The codec 4CC
if (!string.IsNullOrEmpty(streamProperty.CompressionId))
{
codecStreamName.AppendFormat(CultureInfo.CurrentCulture, ", {0}", streamProperty.CompressionId);
}
// The codec name
string codecName = null;
if (codecList != null)
{
if (codecList.CodecNames.TryGetValue(GetCodecType(streamProperty.StreamType), out codecName))
{
codecStreamName.AppendFormat(CultureInfo.CurrentCulture, ", {0}", codecName);
}
}
if (string.IsNullOrEmpty(codecName) && !string.IsNullOrEmpty(streamProperty.CompressionId))
{
codecStreamName.AppendDescriptiveCodecName(streamProperty.CompressionId);
}
}
return(codecStreamName.ToString());
}
private static IDataPacket GetStreamData(StreamPropertiesObject streamProperties, IDataPacket streamData)
{
// If stream properties contains a data packet with codec specific data,
// insert that data packet before the stream data
if (streamProperties != null &&
streamProperties.CodecSpecificData != null)
{
return(streamProperties.CodecSpecificData.Append(streamData));
}
return(streamData);
}
private StreamPropertiesObject GetStreamProperty(AsfObject asfObject, int streamID)
{
StreamPropertiesObject streamProperty = asfObject as StreamPropertiesObject;
if (streamProperty != null && streamProperty.StreamNumber == streamID)
{
return(streamProperty);
}
foreach (AsfObject child in asfObject.Children)
{
streamProperty = GetStreamProperty(child, streamID);
if (streamProperty != null && streamProperty.StreamNumber == streamID)
{
return(streamProperty);
}
}
return(streamProperty);
}
private void AddPayload(IDataBlockBuilder dataBlockBuilder, IDictionary <byte, ICodecStreamBuilder> codecStreamBuilders, Payload payload, CodecListObject codecList, AsfObject asfObject)
{
if (payload.Streams == null || payload.Streams.Count == 0)
{
return;
}
byte streamNumber = payload.StreamNumber;
if (codecStreamBuilders.ContainsKey(streamNumber))
{
ICodecStreamBuilder codecStreamBuilder = codecStreamBuilders[streamNumber];
foreach (IDataPacket streamData in payload.Streams)
{
codecStreamBuilder.Data = codecStreamBuilder.Data.Append(streamData);
}
}
else
{
StreamPropertiesObject streamProperty = GetStreamProperty(asfObject, streamNumber);
ICodecStreamBuilder codecStreamBuilder = dataBlockBuilder.AddCodecStream();
codecStreamBuilder.Name = GetCodecStreamName(streamNumber, streamProperty, codecList);
// The DataFormat will be set by the codec detector (if one exists)
//codecStreamBuilder.DataFormat = GetDataFormat(streamProperty);
codecStreamBuilder.Data = GetStreamData(streamProperty, payload.Streams[0]);
for (int streamIndex = 1; streamIndex < payload.Streams.Count; streamIndex++)
{
codecStreamBuilder.Data = codecStreamBuilder.Data.Append(payload.Streams[streamIndex]);
}
codecStreamBuilder.AbsoluteStartOffset = codecStreamBuilder.Data.StartOffset;
codecStreamBuilders.Add(streamNumber, codecStreamBuilder);
}
}
