/// <summary>
/// Load the entire partition from disk (when not yet loaded)
/// </summary>
public void Load()
{
if (!this.IsLoaded)
{
MXFKLVFactory klvFactory = new MXFKLVFactory();
using (MXFReader reader = new MXFReader(this.File.Filename))
{
// Seek just after this partition
reader.Seek(this.DataOffset + this.Length);
while (!reader.EOF)
{
MXFKLV klv = klvFactory.CreateObject(reader, this);
if (klv.Key.Type == KeyType.Partition || klv.Key.Type == KeyType.RIP || klv.Key.Type == KeyType.PrimerPack)
{
break; // Next partition or other segment, quit reading
}
if (!this.Children.Any(a => a.Offset == klv.Offset))
{
// Normal, just add the new child
this.AddChild(klv);
}
// Next KLV please
reader.Seek(klv.DataOffset + klv.Length);
}
}
this.IsLoaded = true;
}
}
private void DoPostWork(BackgroundWorker worker, Stopwatch sw, Dictionary <UInt16, MXFEntryPrimer> allPrimerKeys)
{
// Update all type descriptions
MXFKLVFactory.UpdateAllTypeDescriptions(allPrimerKeys);
// Resolve the references
sw.Restart();
worker.ReportProgress(93, "Resolving flatlist");
int numOfResolved = ResolveReferences();
Debug.WriteLine("{0} references resolved in {1} ms", numOfResolved, sw.ElapsedMilliseconds);
// Create the logical tree
worker.ReportProgress(94, "Creating Logical tree");
sw.Restart();
CreateLogicalTree();
Debug.WriteLine("Logical tree created in {0} ms", sw.ElapsedMilliseconds);
}
/// <summary>
/// Try to locate the RIP
/// </summary>
private bool ReadRIP(MXFKLVFactory klvFactory)
{
if (this.RIP == null)
{
// Read the last 4 bytes of the file
m_reader.Seek(this.Filesize - 4);
uint ripSize = m_reader.ReadD();
if (ripSize < this.Filesize && ripSize >= 4) // At least 4 bytes
{
m_reader.Seek(this.Filesize - ripSize);
MXFKLV klv = klvFactory.CreateObject(m_reader, null);
if (klv.Key.Type == KeyType.RIP)
{
// Yes, RIP found
this.AddChild(klv);
this.RIP = klv as MXFRIP;
return(true);
}
}
}
return(false);
}
/// <summary>
/// Partially Parse an MXF file, skip all data
/// </summary>
protected void ParsePartial(BackgroundWorker worker)
{
Stopwatch sw = Stopwatch.StartNew();
MXFKLVFactory klvFactory = new MXFKLVFactory();
MXFPartition currentPartition = null;
int previousPercentage = 0;
Dictionary <UInt16, MXFEntryPrimer> allPrimerKeys = null;
int[] counters = new int[Enum.GetNames(typeof(KeyType)).Length];
PartialSeekMode seekMode = PartialSeekMode.Unknown;
using (m_reader = new MXFReader(this.Filename))
{
this.Filesize = m_reader.Size;
MXFObject partitions = new MXFNamedObject("Partitions", 0);
this.AddChild(partitions);
// Start with trying to find the RIP
bool ripFound = ReadRIP(klvFactory);
if (ripFound)
{
seekMode = PartialSeekMode.UsingRIP;
}
m_reader.Seek(0); // Start at the beginning
// Start by reading the first partition
int partitionNumber = 0; // For easy partition identification
while (!m_reader.EOF && seekMode != PartialSeekMode.Backwards) // Eof and NOT searching backwards
{
MXFKLV klv = klvFactory.CreateObject(m_reader, currentPartition);
// Update overall counters
if (klv.Key.Type == KeyType.None)
{
counters[(int)klv.Key.Type]++;
}
if (klv.Key.Type == KeyType.Partition && seekMode == PartialSeekMode.Backwards)
{
if (this.Partitions.Exists(a => a.Offset == klv.Offset))
{
// A new partition has been found that we already found, quit the main loop
break;
}
}
// Process the new KLV
ProcessKLVObject(klv, partitions, ref currentPartition, ref partitionNumber, ref allPrimerKeys);
// If we found the second partition
long nextSeekPosition = klv.DataOffset + klv.Length;
if (partitionNumber >= 2) // Header fully read, now busy with the second partition
{
switch (seekMode)
{
case PartialSeekMode.UsingRIP: // And we already found the RIP
if (currentPartition.FirstSystemItem != null) // And we found the first system item
{
MXFEntryRIP ripEntry = this.RIP.GetPartition(partitionNumber);
if (ripEntry != null)
{
// Mark the current partition as not-completely read
currentPartition.IsLoaded = false;
// Start at the next partition
nextSeekPosition = (long)ripEntry.PartitionOffset;
}
}
break;
case PartialSeekMode.Backwards: // NO RIP, searching backwards
// Backwards, jump to the PREVIOUS partition
if (currentPartition.FirstSystemItem != null) // And we found the first system item
{
// Jump to the previous partition
if (currentPartition.PreviousPartition != 0)
{
// And we haven't found this partition yet
if (!this.Partitions.Exists(a => a.ThisPartition == currentPartition.PreviousPartition))
{
nextSeekPosition = (long)currentPartition.PreviousPartition; // Jump to previous
}
}
}
break;
case PartialSeekMode.Unknown: // No RIP....
// Hmmm, RIP is not found, check if we have a footer partition somewhere
MXFPartition part = this.Partitions.Where(a => a.FooterPartition != 0).FirstOrDefault();
if (part != null)
{
// If we are already at the footer, don't bother to seek
if (currentPartition.Offset != (long)part.FooterPartition)
{
nextSeekPosition = (long)part.FooterPartition; // Start at the footer
seekMode = PartialSeekMode.Backwards;
}
}
break;
}
}
// Next KLV please
m_reader.Seek(nextSeekPosition);
// Only report progress when the percentage has changed
int currentPercentage = (int)((m_reader.Position * 90) / m_reader.Size);
if (currentPercentage != previousPercentage)
{
worker.ReportProgress(currentPercentage, "Partial Parsing MXF file");
previousPercentage = currentPercentage;
}
}
}
// Progress should now be 90%
// Update all type descriptions
klvFactory.UpdateAllTypeDescriptions(allPrimerKeys);
Debug.WriteLine("Finished parsing file '{0}' in {1} ms", this.Filename, sw.ElapsedMilliseconds);
sw.Restart();
// Create a list with all UID keys
worker.ReportProgress(91, "Creating key list");
Dictionary <string, MXFObject> allKeys = new Dictionary <string, MXFObject>();
CreateKeyList(allKeys, this);
// Resolve the references
worker.ReportProgress(92, "Resolving references");
ResolveReferences(allKeys, this);
Debug.WriteLine("Finished resolving references in {0} ms", sw.ElapsedMilliseconds);
sw.Restart();
this.FlatList = new List <MXFObject>();
worker.ReportProgress(93, "Creating flat list");
this.AddToList(this.FlatList);
Debug.WriteLine("Flatlist created in {0} ms", sw.ElapsedMilliseconds);
sw.Restart();
// Create the logical tree
worker.ReportProgress(94, "Creating logical tree");
CreateLogicalTree();
Debug.WriteLine("Logical tree created in {0} ms", sw.ElapsedMilliseconds);
sw.Restart();
// And Execute FAST tests
this.ExecuteValidationTest(worker, false);
// Finished
worker.ReportProgress(100, "Finished");
}
/// <summary>
/// Fully Parse an MXF file
/// </summary>
protected void ParseFull(BackgroundWorker worker)
{
Stopwatch sw = Stopwatch.StartNew();
MXFKLVFactory klvFactory = new MXFKLVFactory();
MXFPartition currentPartition = null;
int previousPercentage = 0;
Dictionary <UInt16, MXFEntryPrimer> allPrimerKeys = null;
int[] counters = new int[Enum.GetNames(typeof(KeyType)).Length];
using (m_reader = new MXFReader(this.Filename))
{
this.Filesize = m_reader.Size;
MXFObject partitions = new MXFNamedObject("Partitions", 0);
this.AddChild(partitions);
int partitionNumber = 0; // For easy partition identification
while (!m_reader.EOF)
{
MXFKLV klv = klvFactory.CreateObject(m_reader, currentPartition);
// Update overall counters
if (klv.Key.Type == KeyType.None)
{
counters[(int)klv.Key.Type]++;
}
// Process the new KLV
ProcessKLVObject(klv, partitions, ref currentPartition, ref partitionNumber, ref allPrimerKeys);
// Next KLV please
m_reader.Seek(klv.DataOffset + klv.Length);
// Only report progress when the percentage has changed
int currentPercentage = (int)((m_reader.Position * 90) / m_reader.Size);
if (currentPercentage != previousPercentage)
{
worker.ReportProgress(currentPercentage, "Parsing MXF file");
previousPercentage = currentPercentage;
}
}
}
// Progress should now be 90%
// Update all type descriptions
klvFactory.UpdateAllTypeDescriptions(allPrimerKeys);
worker.ReportProgress(91, "Creating key list");
Debug.WriteLine("Finished parsing file '{0}' in {1} ms", this.Filename, sw.ElapsedMilliseconds);
sw.Restart();
// Create a list with all UID keys
Dictionary <string, MXFObject> allKeys = new Dictionary <string, MXFObject>();
CreateKeyList(allKeys, this);
worker.ReportProgress(92, "Creating resolving references");
// Resolve the references
ResolveReferences(allKeys, this);
Debug.WriteLine("Finished resolving references in {0} ms", sw.ElapsedMilliseconds);
sw.Restart();
worker.ReportProgress(93, "Resolving flatlist");
this.FlatList = new List <MXFObject>();
this.AddToList(this.FlatList);
Debug.WriteLine("Flatlist created in {0} ms", sw.ElapsedMilliseconds);
sw.Restart();
worker.ReportProgress(94, "Creating Logical tree");
// Create the logical tree
CreateLogicalTree();
Debug.WriteLine("Logical tree created in {0} ms", sw.ElapsedMilliseconds);
sw.Restart();
// And Execute ALL test
this.ExecuteValidationTest(worker, true);
// Finished
worker.ReportProgress(100, "Finished");
}
// Add all meta data see spec: SMPTE ST 331:2011
private void ParseElements(MXFReader reader)
{
reader.Seek(this.DataOffset); // Seek to the start of the data
long end = this.DataOffset + this.Length;
byte[] byteArray;
while (reader.Position < end)
{
var(Tag, Size) = GetTag(reader);
var pos = reader.Position;
switch (Tag)
{
// Metadata link
case 0x80:
byteArray = reader.ReadArray(reader.ReadByte, (int)Size);
this.AddChild(new MXFWrapperObject <byte[]>(byteArray, "Metadata link", pos, Size));
break;
// SMPTE 12M time-code
case 0x81:
byteArray = reader.ReadArray(reader.ReadByte, (int)Size);
this.AddChild(new MXFWrapperObject <byte[]>(byteArray, "SMPTE 12M time-code", pos, Size));
break;
// SMPTE 309M date-time stamp
case 0x82:
byteArray = reader.ReadArray(reader.ReadByte, (int)Size);
this.AddChild(new MXFWrapperObject <byte[]>(byteArray, "SMPTE 309M date-time stamp", pos, Size));
break;
// UMID
case 0x83:
byteArray = reader.ReadArray(reader.ReadByte, (int)Size);
if (Size == 64)
{
var umid = new MXFExtendedUMID(byteArray);
this.AddChild(new MXFWrapperObject <MXFExtendedUMID>(umid, "ExtendedUMID", pos, Size));
}
else if (Size == 32)
{
var umid = new MXFUMID(byteArray);
this.AddChild(new MXFWrapperObject <MXFUMID>(umid, "UMID", pos, Size));
}
else
{
Debug.WriteLine("Invalid tag size for UMID. Must be 32 bytes or 64 for extended UMID");
}
break;
// MPEG-2 picture editing
case 0x84:
byteArray = reader.ReadArray(reader.ReadByte, (int)Size);
this.AddChild(new MXFWrapperObject <byte[]>(byteArray, "MPEG-2 picture editing", pos, Size));
break;
// 8-channel AES3 editing
case 0x85:
byteArray = reader.ReadArray(reader.ReadByte, (int)Size);
this.AddChild(new MXFWrapperObject <byte[]>(byteArray, "8-channel AES3 editing", pos, Size));
break;
// Picture bit-stream splicing
case 0x86:
byteArray = reader.ReadArray(reader.ReadByte, (int)Size);
this.AddChild(new MXFWrapperObject <byte[]>(byteArray, "Picture bit-stream splicing", pos, Size));
break;
// MPEG decoder buffer delay
case 0x87:
byteArray = reader.ReadArray(reader.ReadByte, (int)Size);
this.AddChild(new MXFWrapperObject <byte[]>(byteArray, "MPEG decoder buffer delay", pos, Size));
break;
// KLV metadata
case 0x88:
var obj = new MXFKLVFactory().CreateObject(reader, this.Partition);
this.AddChild(obj);
break;
// AES3 non-audio metadata
case 0x89:
byteArray = reader.ReadArray(reader.ReadByte, (int)Size);
this.AddChild(new MXFWrapperObject <byte[]>(byteArray, "AES3 non-audio metadata", pos, Size));
break;
default:
break;
}
// seek to next tag position
reader.Seek(pos + Size);
}
}
/// <summary>
/// Fully Parse an MXF file
/// </summary>
protected void ParseFull(BackgroundWorker worker)
{
Stopwatch sw = Stopwatch.StartNew();
MXFKLVFactory klvFactory = new MXFKLVFactory();
MXFPartition currentPartition = null;
int previousPercentage = 0;
Dictionary <UInt16, MXFEntryPrimer> allPrimerKeys = null;
//int[] counters = new int[Enum.GetNames(typeof(KeyType)).Length];
using (m_reader = new MXFReader(this.Filename))
{
this.Filesize = m_reader.Size;
MXFObject partitions = new MXFNamedObject("Partitions", 0);
this.AddChild(partitions);
int partitionNumber = 0; // For easy partition identification
while (!m_reader.EOF)
{
try
{
MXFKLV klv = klvFactory.CreateObject(m_reader, currentPartition);
//// Update overall counters
//if (klv.Key.Type == KeyType.None)
// counters[(int)klv.Key.Type]++;
// Process the new KLV
ProcessKLVObject(klv, partitions, ref currentPartition, ref partitionNumber, ref allPrimerKeys);
// Next KLV please
m_reader.Seek(klv.DataOffset + klv.Length);
}
catch (Exception e)
{
m_reader.SeekForNextPotentialKey();
}
// Only report progress when the percentage has changed
int currentPercentage = (int)((m_reader.Position * 90) / m_reader.Size);
if (currentPercentage != previousPercentage)
{
worker.ReportProgress(currentPercentage, "Parsing MXF file");
previousPercentage = currentPercentage;
}
}
}
Debug.WriteLine("Finished parsing file '{0}' in {1} ms", this.Filename, sw.ElapsedMilliseconds);
// Progress should now be 90%
DoPostWork(worker, sw, allPrimerKeys);
// And Execute ALL test
sw.Restart();
this.ExecuteValidationTest(worker, true);
Debug.WriteLine("Tests executed in {0} ms", sw.ElapsedMilliseconds);
// Finished
worker.ReportProgress(100, "Finished");
}