public string ToTextualConvention(FileFormat?format = null)
{
try
{
StringBuilder sb = new StringBuilder();
var ts = Timebase.TimeOfDay.Add(TimeSpan.FromMilliseconds(Offset));
if (IsRtcp)
{
sb.Append(RtpSend.ToTextualConvention(format ?? Format, Media.Rtcp.RtcpPacket.GetPackets(Blob, Pointer + sizeOf_RD_packet_T, BlobLength - sizeOf_RD_packet_T), ts, Source));
}
else
{
using (var rtp = new Rtp.RtpPacket(Blob, Pointer + sizeOf_RD_packet_T)) sb.Append(RtpSend.ToTextualConvention(format ?? Format, rtp, ts, Source));
}
return(sb.ToString());
}
catch { throw; }
}
/// <summary>
/// Reads a <see cref="RtpToolEntry"/> from the stream and adds the offset to the list of offets.
/// The entry is persisted in memory and should be disposed.
/// </summary>
/// <returns>The DumpItem read</returns>
internal RtpToolEntry ReadToolEntry()
{
try
{
//Create an item with the format guessed by reading the header.
RtpToolEntry entry = null;
if (!HasNext)
{
return(entry);
}
//Read the file header if no other data has been read yet and the format possibly has header (Determines Binary or Text FileFormat)
if (m_Reader.BaseStream.Position == 0)
{
ReadFileHeader();
}
//If no format can be determined then raise a DumpReader type exception with the following message.
if (m_Format == FileFormat.Unknown)
{
Media.Common.TaggedExceptionExtensions.RaiseTaggedException(this, "Unable to determine format!");
}
int offsetsCount = m_Offsets.Count;
//Take the position now.
long position = m_Reader.BaseStream.Position;
//Add the offset if we didn't already know about it
if (offsetsCount == 0 || m_Reader.BaseStream.Position > m_Offsets[offsetsCount - 1])
{
//Which is the position in the stream
m_Offsets.Add(position);
//Indicate something was added.
++offsetsCount;
}
//Only contains data if something goes wrong during parsing,
//And would then contain the data consumed while attempting to parse.
byte[] unexpectedData = null;
//This allows certain text items to have a data= token and others to not.
//It also allows reading of Rtp in Rtcp only mode
FileFormat foundFormat = m_Format;
//If the format is not text then
//This is followed by one binary header (RD_hdr_t) and one RD_packet_t structure for each received packet. All fields are in network byte order. The RTP and RTCP packets are recorded as-is.
if (m_Format < FileFormat.Text)
{
//Create an entry using the size of the RD_packet_T (8 bytes)
entry = new RtpToolEntry(m_StartTime, m_Source, foundFormat, new byte[RtpToolEntry.sizeOf_RD_packet_T], null, position);
//Read that many bytes from the stream into the enty.
m_Reader.Read(entry.Blob, 0, RtpToolEntry.sizeOf_RD_packet_T);
//Determine how many more bytes follow.
int itemLength = entry.Length - RtpToolEntry.sizeOf_RD_packet_T;
//If there are any more bytes related to the item itemLength will be > 0
if (itemLength > 0)
{
//Read the data and increase MaxSize
entry.Concat(m_Reader.ReadBytes(itemLength));
}
}
else
{
//Parse data and build packet from the textual data,
//If a Binary format is found m_FileHeader will contain any data which was unexpected by the ParseTextEntry process which should consists of the `#!rtpplay1.0 ...\n`
entry = RtpSend.ParseText(m_Reader, m_Source, ref foundFormat, out unexpectedData);
}
//The format of the item does not match the reader(which would only happen if given an unknown format)
if (foundFormat != m_Format)
{
//If the the format of the entry found was binary
if (entry.Format < FileFormat.Text)
{
//The unexpected data consists of the supposed fileheader.
if (m_FileIdentifier == null)
{
//Assign it
m_FileIdentifier = unexpectedData;
//Read the following Binary File Header
ReadBinaryFileHeader();
//no more data is unexpected.
unexpectedData = null;
//Remove the offset which was not related to an entry.
m_Offsets.RemoveAt(offsetsCount - 1);
//Read the entry.
return(ReadToolEntry());
}
else
{
Media.Common.TaggedExceptionExtensions.RaiseTaggedException(unexpectedData, "Encountered a Binary file header when already parsed the header. The Tag property contains the data unexpected.");
}
}
else if (unexpectedData != null)
{
Media.Common.TaggedExceptionExtensions.RaiseTaggedException(entry, "Unexpected data found while parsing a Text format. See the Tag property of the InnerException", new Common.TaggedException <byte[]>(unexpectedData));
}
}
//Call determine format so item has the correct format (Header [or Payload])
if (foundFormat == FileFormat.Unknown)
{
Media.Common.TaggedExceptionExtensions.RaiseTaggedException(entry, "Unknown format");
}
return(entry);
}
catch { throw; } //Should handle the exception where unexpectedData is assigned.
}
