private static RecordingAttribute getAttribute(StringBuilder name, StreamBufferAttrDataType attributeType, byte[] attributeValue)
{
string attributeName = name.ToString().TrimEnd('\0');
string type = attributeType.ToString();
switch (attributeType)
{
case StreamBufferAttrDataType.Binary:
RecordingAttribute binaryAttribute = new RecordingAttribute(attributeName, type, attributeValue);
return(binaryAttribute);
case StreamBufferAttrDataType.Bool:
RecordingAttribute boolAttribute = new RecordingAttribute(attributeName, type, attributeValue[0] == 0);
return(boolAttribute);
case StreamBufferAttrDataType.DWord:
int intValue = attributeValue[0] << 24 | attributeValue[1] << 16 | attributeValue[2] << 8 | attributeValue[3];
RecordingAttribute intAttribute = new RecordingAttribute(attributeName, type, intValue);
return(intAttribute);
case StreamBufferAttrDataType.Guid:
RecordingAttribute guidAttribute = new RecordingAttribute(attributeName, type, new Guid(attributeValue));
return(guidAttribute);
case StreamBufferAttrDataType.QWord:
long longValue = attributeValue[0] << 56 | attributeValue[1] << 48 | attributeValue[2] << 40
| attributeValue[3] << 32 | attributeValue[4] << 24 | attributeValue[5] << 16
| attributeValue[6] << 8 | attributeValue[7];
RecordingAttribute longAttribute = new RecordingAttribute(attributeName, type, longValue);
return(longAttribute);
case StreamBufferAttrDataType.String:
Encoding sourceEncoding = Encoding.GetEncoding("utf-16");
if (sourceEncoding == null)
{
return(null);
}
string encodedString = sourceEncoding.GetString(attributeValue, 0, attributeValue.Length);
RecordingAttribute stringAttribute = new RecordingAttribute(attributeName, type, encodedString);
return(stringAttribute);
case StreamBufferAttrDataType.Word:
int shortValue = attributeValue[0] << 8 | attributeValue[1];
RecordingAttribute shortAttribute = new RecordingAttribute(attributeName, type, shortValue);
return(shortAttribute);
default:
return(null);
}
}
private static RecordingAttribute getAttribute(StringBuilder name, StreamBufferAttrDataType attributeType, byte[] attributeValue)
{
string attributeName = name.ToString().TrimEnd('\0');
string type = attributeType.ToString();
switch (attributeType)
{
case StreamBufferAttrDataType.Binary:
RecordingAttribute binaryAttribute = new RecordingAttribute(attributeName, type, attributeValue);
return (binaryAttribute);
case StreamBufferAttrDataType.Bool:
RecordingAttribute boolAttribute = new RecordingAttribute(attributeName, type, attributeValue[0] == 0);
return (boolAttribute);
case StreamBufferAttrDataType.DWord:
int intValue = attributeValue[0] << 24 | attributeValue[1] << 16 | attributeValue[2] << 8 | attributeValue[3];
RecordingAttribute intAttribute = new RecordingAttribute(attributeName, type, intValue);
return (intAttribute);
case StreamBufferAttrDataType.Guid:
RecordingAttribute guidAttribute = new RecordingAttribute(attributeName, type, new Guid(attributeValue));
return (guidAttribute);
case StreamBufferAttrDataType.QWord:
long longValue = attributeValue[0] << 56 | attributeValue[1] << 48 | attributeValue[2] << 40
| attributeValue[3] << 32 | attributeValue[4] << 24 | attributeValue[5] << 16
| attributeValue[6] << 8 | attributeValue[7];
RecordingAttribute longAttribute = new RecordingAttribute(attributeName, type, longValue);
return (longAttribute);
case StreamBufferAttrDataType.String:
Encoding sourceEncoding = Encoding.GetEncoding("utf-16");
if (sourceEncoding == null)
return (null);
string encodedString = sourceEncoding.GetString(attributeValue, 0, attributeValue.Length);
RecordingAttribute stringAttribute = new RecordingAttribute(attributeName, type, encodedString);
return (stringAttribute);
case StreamBufferAttrDataType.Word:
int shortValue = attributeValue[0] << 8 | attributeValue[1];
RecordingAttribute shortAttribute = new RecordingAttribute(attributeName, type, shortValue);
return (shortAttribute);
default:
return (null);
}
}
/// <summary>
/// Load the attribute collection from a recording file (dvr-ms or wtv).
/// </summary>
/// <param name="fileName"></param>
/// <returns>An error message or null if the load succeeds.</returns>
public static string Load(string fileName)
{
if (!File.Exists(fileName))
{
return("The recording file ' " + fileName + "' does not exist");
}
StreamBufferRecordingAttributes recordingAttributes = new StreamBufferRecordingAttributes();
int reply = ((IFileSourceFilter)recordingAttributes).Load(fileName, null);
if (reply != 0)
{
return("The attributes cannot be loaded");
}
int reserved = 0;
short attributeCount;
reply = ((IStreamBufferRecordingAttribute)recordingAttributes).GetAttributeCount(reserved, out attributeCount);
attributes = new Collection <RecordingAttribute>();
for (short index = 0; index < attributeCount; index++)
{
StreamBufferAttrDataType attributeType;
StringBuilder name = null;
byte[] attributeValue = null;
short nameLength = 0;
short valueLength = 0;
reply = ((IStreamBufferRecordingAttribute)recordingAttributes).GetAttributeByIndex(index,
ref reserved,
name,
ref nameLength,
out attributeType,
attributeValue,
ref valueLength);
name = new StringBuilder(nameLength);
attributeValue = new byte[valueLength];
reply = ((IStreamBufferRecordingAttribute)recordingAttributes).GetAttributeByIndex(index,
ref reserved,
name,
ref nameLength,
out attributeType,
attributeValue,
ref valueLength);
if (name != null && name.Length != 0)
{
RecordingAttribute attribute = getAttribute(name, attributeType, attributeValue);
if (attribute != null)
{
attributes.Add(attribute);
}
}
}
return(null);
}
