public MXFSystemItem(MXFReader reader, MXFKLV headerKLV)
: base(headerKLV, "SystemItem (CP)", KeyType.SystemItem)
{
this.m_eType = MXFObjectType.SystemItem;
if (this.Key[12] == 0x14)
{
this.Key.Name = "SystemItem (GC)";
}
reader.Seek(this.DataOffset); // Seek to the start of the data
// Parse system bitmap
this.SystemBitmap = (SystemBitmap)reader.ReadByte();
// Parse Content package rate
byte rate = reader.ReadByte();
int rateIndex = (rate & 0x1E) >> 1;
int[] rates = new int[16] {
0, 24, 25, 30, 48, 50, 60, 72, 75, 90, 96, 100, 120, 0, 0, 0
};
int rateNonDrop = 1;
if (rateIndex < 16)
{
rateNonDrop = rates[rateIndex];
}
this.PackageRate = rateNonDrop;
if ((rate & 0x01) == 0x01) // 1.001 divider active?
{
this.PackageRate = this.PackageRate / 1.001;
}
// Parse Content Package Type
byte type = reader.ReadByte();
this.StreamStatus = (SystemStreamStatus)((type & 0xE0) >> 5);
this.LowLatencyMode = ((type & 0x10) == 0x10);
this.TransferMode = (SystemTransferMode)((type & 0x0C) >> 2);
this.TimingMode = (SystemTimingMode)(type & 0x03);
this.ChannelHandle = reader.ReadUInt16();
this.ContinuityCount = reader.ReadUInt16();
this.SMPTE = reader.ReadULKey(); // Always read even if zero
MXFTimeStamp creationTimeStamp = reader.ReadBCDTimeCode(this.PackageRate);
this.CreationDate = creationTimeStamp.ToString();
this.UserDate = reader.ReadBCDTimeCode(this.PackageRate);
this.UserDateFullFrameNb = this.UserDate.GetString(true);
}
/// <summary>
/// Copy constructor
/// </summary>
/// <param name="other"></param>
public MXFTimeStamp(MXFTimeStamp other)
{
this.DropFrame = other.DropFrame;
this.HasFields = other.HasFields;
this.FrameRate = other.FrameRate;
this.Frame = other.Frame;
this.Second = other.Second;
this.Minute = other.Minute;
this.Hour = other.Hour;
this.Day = other.Day;
this.Month = other.Month;
this.Year = other.Year;
this.FullFrame = other.FullFrame;
this.Frame = other.Frame;
}
/// <summary>
/// Compares two timestamps to check if they are the same
/// </summary>
/// <param name="other">The timestamp to be compared</param>
/// <returns>True if the timestamps are the same</returns>
public bool IsSame(MXFTimeStamp other)
{
if (this.Year == other.Year &&
this.Month == other.Month &&
this.Day == other.Day &&
this.Hour == other.Hour &&
this.Minute == other.Minute &&
this.Second == other.Second &&
this.FullFrame == other.FullFrame &&
this.FrameRate == other.FrameRate)
{
return(true);
}
return(false);
}
/// <summary>
/// Reads a BCD timecode
/// </summary>
/// <param name="frameRate"></param>
/// <returns></returns>
public MXFTimeStamp ReadBCDTimeCode(double frameRate)
{
// TODO If MJD is set, time is milliseconds since X
byte type = this.ReadByte();
MXFTimeStamp timeStamp = new MXFTimeStamp();
timeStamp.ParseBCDTimeCode(this, frameRate);
this.ReadByte(); // BG7 + BG8
// Read 8 dummy bytes (always zero)
this.ReadUInt64();
return(timeStamp);
}
/// <summary>
/// Check the essence range
/// </summary>
/// <param name="file"></param>
/// <param name="results"></param>
protected void CheckUserDates(MXFFile file, List <MXFValidationResult> results)
{
List <MXFSystemItem> items = this.m_systemItems.OrderBy(a => a.ContinuityCount).ToList();
if (items.Count > 1)
{
MXFTimeStamp ts = new MXFTimeStamp(items.First().UserDate);
if (ts != null)
{
MXFValidationResult valResult = new MXFValidationResult("System Items");
results.Add(valResult); // And directly add the results
MXFTimeStamp tsLast = null;
for (int n = 1; n < items.Count() - 1; n++) // Skip last one (always invalid??)
{
ts.Increase();
if (!items[n].UserDate.IsEmpty())
{
if (!items[n].UserDate.IsSame(ts))
{
valResult.SetError(string.Format("Invalid user date at offset {0} (was {1}, expected {2})!", items[n].Offset, items[n].UserDate, ts));
return;
}
tsLast = items[n].UserDate;
}
}
if (tsLast != null)
{
valResult.SetSuccess(string.Format("UserDates are continious from {0} to {1}, at {2} fps!", items.First().UserDate, tsLast, ts.FrameRate));
}
else
{
valResult.SetSuccess(string.Format("UserDates are continious!"));
}
}
}
}
public MXFCDPPacket(MXFReader reader)
: base(reader)
{
UInt16 identifier = reader.ReadW();
if (identifier == 0x9669)
{
this.Length = reader.ReadB();
this.FrameRateE = (MXFCDFFrameRate)((reader.ReadB() & 0xF0) >> 4);
switch (this.FrameRateE)
{
case MXFCDFFrameRate.Rate_24: this.FrameRate = 24; break;
case MXFCDFFrameRate.Rate_24000_1001: this.FrameRate = 24000.0 / 1001.0; break;
case MXFCDFFrameRate.Rate_25: this.FrameRate = 25; break;
case MXFCDFFrameRate.Rate_30: this.FrameRate = 30; break;
case MXFCDFFrameRate.Rate_30000_1001: this.FrameRate = 30000.0 / 1001.0; break;
case MXFCDFFrameRate.Rate_50: this.FrameRate = 50; break;
case MXFCDFFrameRate.Rate_60: this.FrameRate = 60; break;
case MXFCDFFrameRate.Rate_60000_1001: this.FrameRate = 60000.0 / 1001.0; break;
}
byte options = reader.ReadB();
this.TimeCodePresent = ((options & 0x80) != 0);
this.CCDataPresent = ((options & 0x40) != 0);
this.SVCInfoPresent = ((options & 0x20) != 0);
this.SVCInfoStart = ((options & 0x10) != 0);
this.SVCInfoChange = ((options & 0x08) != 0);
this.SVCInfoComplete = ((options & 0x04) != 0);
this.CaptionServiceActive = ((options & 0x02) != 0);
this.SequenceCounter = reader.ReadW();
byte count = 0;
long endPos = this.Offset + this.Length;
while (reader.Position < endPos)
{
identifier = reader.ReadB();
switch (identifier)
{
case 0x71:
this.TimeCode = new MXFTimeStamp();
this.TimeCode.ParseSMPTE12M(reader, this.FrameRate.Value);
break;
case 0x72:
count = (byte)(reader.ReadB() & 0x1F);
for (int n = 0; n < count; n++)
{
this.AddChild(new MXFEntryCCData(reader));
}
break;
case 0x73:
count = (byte)(reader.ReadB() & 0x0F);
for (int n = 0; n < count; n++)
{
this.AddChild(new MXFEntrySVCInfo(reader));
}
break;
case 0x74:
this.AddChild(new MXFCDPFooter(reader));
break;
default:
this.AddChild(new MXFCDPFuture(reader, (byte)identifier));
break;
}
}
}
}
