public byte[] doPackaging(byte[] nalu)
{
if (IsAVC)
{
var naluLength = new byte[4];
var buf = BitConverter.GetBytes(nalu.Length).Take(4).Reverse().ToArray();
Array.Copy(buf, 0, naluLength, 0, buf.Length);
var naluLengthList = naluLength.ToList();
naluLengthList.AddRange(nalu);
naluLength = naluLengthList.ToArray();
}
var tmp = H264PacketExtended.annexbNALUStartCode();
var tmpList = tmp.ToList();
tmpList.AddRange(nalu);
tmp = tmpList.ToArray();
return(tmp);
}
//ペイロードは、1つ以上のバイト配列にわたってH264パケットをフラグメント化します
public byte[][] Payload(int mtu, byte[] payload)
{
var payloads = new byte[][] { };
if (payload.Length == 0)
{
return(payloads);
}
Action <byte[]> func = delegate(byte[] nalu)
{
if (nalu.Length == 0)
{
return;
}
var naluType = nalu[0] & H264PacketExtended.naluTypeBitmask;
var naluRefIdc = nalu[0] & H264PacketExtended.naluRefIdcBitmask;
if (naluType == 9 || naluType == 12)
{
return;
}
// Single NALU
if (nalu.Length <= mtu)
{
var output = new byte[nalu.Length];
output = nalu;
var payloadsList = payloads.ToList();
payloadsList.Add(output);
payloads = payloadsList.ToArray();
return;
}
// FU-A
var maxFragmentSize = mtu - H264PacketExtended.fuaHeaderSize;
var naluData = nalu;
var naluDataIndex = 1;
var naluDataLength = nalu.Length - naluDataIndex;
var naluDataRemaining = naluDataLength;
if (common.min(maxFragmentSize, naluDataRemaining) <= 0)
{
return;
}
for (; naluDataRemaining > 0;)
{
var currentFragmentSize = common.min(maxFragmentSize, naluDataRemaining);
var output = new byte[H264PacketExtended.fuaHeaderSize + currentFragmentSize];
output[0] = H264PacketExtended.fuaNALUType;
output[0] |= Convert.ToByte(naluRefIdc);
output[1] = Convert.ToByte(naluType);
if (naluDataRemaining == naluDataLength)
{
// Set start bit
output[1] |= 1 << 7;
}
else if ((naluDataRemaining - currentFragmentSize) == 0)
{
// Send end bit
output[1] |= 1 << 6;
}
Array.Copy(naluData, naluDataIndex, output, H264PacketExtended.fuaHeaderSize, currentFragmentSize);
var payloadsList = payloads.ToList();
payloadsList.Add(output);
payloads = payloadsList.ToArray();
naluDataRemaining -= currentFragmentSize;
naluDataIndex += currentFragmentSize;
}
};
H264PacketExtended.emitNalus(payload, func);
return(payloads);
}
