public int Decode(byte[] buffer, int bufferOffset, int size, bool bDecodeName)
{
int originalSize = size;
if (size == 0 || buffer == null)
{
return(-1);
}
if (buffer[bufferOffset] == 0x05)
{
type = AMFDataType.AMF_NULL;
return(1);
}
if (bDecodeName && size < 4) // at least name (length + at least 1 byte) and 1 byte of data
{
return(-1);
}
if (bDecodeName)
{
ushort nNameSize = RTMPHelper.ReadInt16(buffer, bufferOffset);
if (nNameSize > size - (short)sizeof(short))
{
return(-1);
}
stringName = RTMPHelper.ReadString(buffer, bufferOffset);
size -= sizeof(short) + stringName.Length;
bufferOffset += sizeof(short) + stringName.Length;
}
if (size == 0)
{
return(-1);
}
size--;
int stringSize = 0;
int result = 0;
switch (buffer[bufferOffset])
{
case (byte)AMFDataType.AMF_NUMBER:
if (size < (int)sizeof(double))
{
return(-1);
}
numVal = RTMPHelper.ReadNumber(buffer, bufferOffset + 1);
size -= sizeof(double);
type = AMFDataType.AMF_NUMBER;
break;
case (byte)AMFDataType.AMF_BOOLEAN:
if (size < 1)
{
return(-1);
}
numVal = Convert.ToDouble(RTMPHelper.ReadBool(buffer, bufferOffset + 1));
size--;
type = AMFDataType.AMF_BOOLEAN;
break;
case (byte)AMFDataType.AMF_STRING:
stringSize = RTMPHelper.ReadInt16(buffer, bufferOffset + 1);
if (size < stringSize + (int)sizeof(short))
{
return(-1);
}
stringVal = RTMPHelper.ReadString(buffer, bufferOffset + 1);
size -= sizeof(short) + stringSize;
type = AMFDataType.AMF_STRING;
break;
case (byte)AMFDataType.AMF_OBJECT:
objVal = new AMFObject();
result = objVal.Decode(buffer, bufferOffset + 1, size, true);
if (result == -1)
{
return(-1);
}
size -= result;
type = AMFDataType.AMF_OBJECT;
break;
case (byte)AMFDataType.AMF_MOVIECLIP:
LibRTMPLogger.Log(LibRTMPLogLevel.Trace, "AMF_MOVIECLIP reserved!");
return(-1);
case (byte)AMFDataType.AMF_NULL:
case (byte)AMFDataType.AMF_UNDEFINED:
case (byte)AMFDataType.AMF_UNSUPPORTED:
type = AMFDataType.AMF_NULL;
break;
case (byte)AMFDataType.AMF_REFERENCE:
LibRTMPLogger.Log(LibRTMPLogLevel.Trace, "AMF_REFERENCE not supported!");
return(-1);
case (byte)AMFDataType.AMF_ECMA_ARRAY:
size -= 4;
// next comes the rest, mixed array has a final 0x000009 mark and names, so its an object
objVal = new AMFObject();
result = objVal.Decode(buffer, bufferOffset + 5, size, true);
if (result == -1)
{
return(-1);
}
size -= result;
type = AMFDataType.AMF_OBJECT;
break;
case (byte)AMFDataType.AMF_OBJECT_END:
return(-1);
case (byte)AMFDataType.AMF_STRICT_ARRAY:
int nArrayLen = RTMPHelper.ReadInt32(buffer, bufferOffset + 1);
size -= 4;
objVal = new AMFObject();
result = objVal.DecodeArray(buffer, bufferOffset + 5, size, nArrayLen, false);
if (result == -1)
{
return(-1);
}
size -= result;
type = AMFDataType.AMF_OBJECT;
break;
case (byte)AMFDataType.AMF_DATE:
if (size < 10)
{
return(-1);
}
date = RTMPHelper.ReadNumber(buffer, bufferOffset + 1);
dateUTCOffset = RTMPHelper.ReadInt16(buffer, bufferOffset + 9);
size -= 10;
break;
case (byte)AMFDataType.AMF_LONG_STRING:
stringSize = RTMPHelper.ReadInt32(buffer, bufferOffset + 1);
if (size < stringSize + 4)
{
return(-1);
}
stringVal = RTMPHelper.ReadLongString(buffer, bufferOffset + 1);
size -= (4 + stringSize);
type = AMFDataType.AMF_STRING;
break;
case (byte)AMFDataType.AMF_RECORDSET:
LibRTMPLogger.Log(LibRTMPLogLevel.Trace, "AMFObjectProperty.Decode AMF_RECORDSET reserved!");
return(-1);
case (byte)AMFDataType.AMF_XML_DOC:
LibRTMPLogger.Log(LibRTMPLogLevel.Trace, "AMFObjectProperty.Decode AMF_XML_DOC not supported!");
return(-1);
case (byte)AMFDataType.AMF_TYPED_OBJECT:
LibRTMPLogger.Log(LibRTMPLogLevel.Trace, "AMFObjectProperty.Decode AMF_TYPED_OBJECT not supported!");
return(-1);
default:
LibRTMPLogger.Log(LibRTMPLogLevel.Trace, string.Format("AMFObjectProperty.Decode Unknown datatype {0}", buffer[bufferOffset]));
return(-1);
} //switch
return(originalSize - size);
}
