// char* AMF_Encode(AMFObject* obj, char* pBuffer, char* pBufEnd);
// char* AMF_EncodeEcmaArray(AMFObject* obj, char* pBuffer, char* pBufEnd);
// char* AMF_EncodeArray(AMFObject* obj, char* pBuffer, char* pBufEnd);
/// <summary> int AMF_Decode(AMFObject * obj, const char *pBuffer, int nSize, int bDecodeName); </summary>
public static int AMF_Decode(AMFObject obj, byte[] buf, int pbuf, int nSize, bool bDecodeName)
{
int nOriginalSize = nSize;
bool bError = false; /* if there is an error while decoding - try to at least find the end mark AMF_OBJECT_END */
obj.o_num = 0;
obj.o_props = null;
while (nSize > 0)
{
if (nSize >= 3)
{
if (AMF.AMF_DecodeInt24(buf, pbuf) == (uint)AMFDataType.AMF_OBJECT_END)
{
nSize -= 3;
bError = false;
break;
}
}
if (bError)
{
Log.RTMP_Log(Log.RTMP_LogLevel.RTMP_LOGERROR, "DECODING ERROR, IGNORING BYTES UNTIL NEXT KNOWN PATTERN!");
nSize--;
pbuf++;
continue;
}
AMFObjectProperty prop = new AMFObjectProperty();
int nRes = AMFObjectProperty.AMFProp_Decode(prop, buf, pbuf, nSize, bDecodeName);
if (nRes == -1)
{
bError = true;
}
else
{
nSize -= nRes;
pbuf += nRes;
AMF_AddProp(obj, prop);
}
}
if (bError)
{
return(-1);
}
return(nOriginalSize - nSize);
}
/// <summary> int AMFProp_Decode(AMFObjectProperty *prop, const char *pBuffer, int nSize, int bDecodeName)</summary>
public static int AMFProp_Decode(AMFObjectProperty prop, byte[] buf, int pBuffer, int nSize, bool bDecodeName)
{
const string __FUNCTION__ = "AMFProp_Decode";
int nOriginalSize = nSize;
prop.p_name = new AVal();
if (nSize == 0 || pBuffer > buf.Length)
{
Log.RTMP_Log(Log.RTMP_LogLevel.RTMP_LOGDEBUG, "{0}: Empty buffer/no buffer pointer!", __FUNCTION__);
return(-1);
}
if (bDecodeName && nSize < 4)
{
/* at least name (length + at least 1 byte) and 1 byte of data */
Log.RTMP_Log(Log.RTMP_LogLevel.RTMP_LOGDEBUG, "{0}: Not enough data for decoding with name, less than 4 bytes!", __FUNCTION__);
return(-1);
}
if (bDecodeName)
{
var nNameSize = AMF.AMF_DecodeInt16(buf, pBuffer);
if (nNameSize > nSize - 2)
{
Log.RTMP_Log(Log.RTMP_LogLevel.RTMP_LOGDEBUG,
"{0}: Name size out of range: namesize ({1}) > len ({2}) - 2",
__FUNCTION__, nNameSize, nSize);
return(-1);
}
AVal name;
AMF.AMF_DecodeString(buf, pBuffer, out name);
prop.p_name = name;
nSize -= 2 + nNameSize;
pBuffer += 2 + nNameSize;
}
if (nSize == 0)
{
return(-1);
}
nSize--;
prop.p_type = (AMFDataType)buf[pBuffer++]; // *pBuffer++;
switch (prop.p_type)
{
case AMFDataType.AMF_NUMBER:
if (nSize < 8)
{
return(-1);
}
prop.p_number = AMF.AMF_DecodeNumber(buf, pBuffer);
nSize -= 8;
break;
case AMFDataType.AMF_BOOLEAN:
if (nSize < 1)
{
return(-1);
}
prop.p_number = AMF.AMF_DecodeBoolean(buf, pBuffer) ? 1 : 0;
nSize--;
break;
case AMFDataType.AMF_STRING:
{
var nStringSize = AMF.AMF_DecodeInt16(buf, pBuffer);
if (nSize < (long)nStringSize + 2)
{
return(-1);
}
AVal v;
AMF.AMF_DecodeString(buf, pBuffer, out v);
prop.p_aval = v;
nSize -= (2 + nStringSize);
break;
}
case AMFDataType.AMF_OBJECT:
{
int nRes = AMFObject.AMF_Decode(prop.p_object, buf, pBuffer, nSize, true);
if (nRes == -1)
{
return(-1);
}
nSize -= nRes;
break;
}
case AMFDataType.AMF_MOVIECLIP:
Log.RTMP_Log(Log.RTMP_LogLevel.RTMP_LOGERROR, "AMF_MOVIECLIP reserved!");
return(-1);
case AMFDataType.AMF_NULL:
case AMFDataType.AMF_UNDEFINED:
case AMFDataType.AMF_UNSUPPORTED:
prop.p_type = AMFDataType.AMF_NULL;
break;
case AMFDataType.AMF_REFERENCE:
Log.RTMP_Log(Log.RTMP_LogLevel.RTMP_LOGERROR, "AMF_REFERENCE not supported!");
return(-1);
case AMFDataType.AMF_ECMA_ARRAY:
{
nSize -= 4;
/* next comes the rest, mixed array has a final 0x000009 mark and names, so its an object */
var nRes = AMFObject.AMF_Decode(prop.p_object, buf, pBuffer + 4, nSize, true);
if (nRes == -1)
{
return(-1);
}
nSize -= nRes;
}
break;
case AMFDataType.AMF_OBJECT_END:
return(-1);
case AMFDataType.AMF_STRICT_ARRAY:
{
var nArrayLen = AMF.AMF_DecodeInt32(buf, pBuffer);
nSize -= 4;
var nRes = AMFObject.AMF_DecodeArray(prop.p_object, buf, pBuffer + 4, nSize, (int)nArrayLen, false);
if (nRes == -1)
{
return(-1);
}
nSize -= nRes;
}
break;
case AMFDataType.AMF_DATE:
{
Log.RTMP_Log(Log.RTMP_LogLevel.RTMP_LOGDEBUG, "AMF_DATE");
if (nSize < 10)
{
return(-1);
}
prop.p_number = AMF.AMF_DecodeNumber(buf, pBuffer);
prop.p_UTCoffset = (short)AMF.AMF_DecodeInt16(buf, pBuffer + 8);
nSize -= 10;
break;
}
case AMFDataType.AMF_LONG_STRING:
case AMFDataType.AMF_XML_DOC:
{
var nStringSize = AMF.AMF_DecodeInt32(buf, pBuffer);
if (nSize < (long)nStringSize + 4)
{
return(-1);
}
AVal v;
AMF.AMF_DecodeLongString(buf, pBuffer, out v);
prop.p_aval = v;
nSize -= (int)(4 + nStringSize);
if (prop.p_type == AMFDataType.AMF_LONG_STRING)
{
prop.p_type = AMFDataType.AMF_STRING;
}
break;
}
case AMFDataType.AMF_RECORDSET:
Log.RTMP_Log(Log.RTMP_LogLevel.RTMP_LOGERROR, "AMF_RECORDSET reserved!");
return(-1);
case AMFDataType.AMF_TYPED_OBJECT:
Log.RTMP_Log(Log.RTMP_LogLevel.RTMP_LOGERROR, "AMF_TYPED_OBJECT not supported!");
return(-1);
case AMFDataType.AMF_AVMPLUS:
{
var nRes = AMFObject.AMF3_Decode(prop.p_object, buf, pBuffer, nSize, true);
if (nRes == -1)
{
return(-1);
}
nSize -= nRes;
prop.p_type = AMFDataType.AMF_OBJECT;
break;
}
default:
Log.RTMP_Log(Log.RTMP_LogLevel.RTMP_LOGDEBUG, "{0} - unknown datatype 0x{1:x2}, @{2}", __FUNCTION__, prop.p_type, pBuffer - 1);
return(-1);
}
return(nOriginalSize - nSize);
}
