private void _ups_Unpacked(object arg1, Nalu arg2)
{
if (_decoder == null)
{
_decoder = new VideoDecoder();
var codicId = Constants.AVCodecID.AV_CODEC_ID_H264;
_decoder.Create(codicId);
}
if (arg2.Header.Type == 7 || arg2.Header.Type == 8)
{
_decoder.Decode(arg2.BytesWithStartCode(), out _curWidth, out _curHeight);
}
else
{
byte[] frameData = _decoder.Decode(arg2.BytesWithStartCode(), out _curWidth, out _curHeight);
if (frameData != null)
{
if (_curWidth != _width || _curHeight != _height)
{
_width = _curWidth;
_height = _curHeight;
_renderSource.SetupSurface(_curWidth, _curHeight);
}
renderFrame(frameData);
}
}
}
private void testReceive(RTP_Packet packet)
{
_nlist.Add(Nalu.Parse(packet.Data));
if (packet.IsMarker)
{
buildFrame();
_nlist = new List <Nalu>();
}
}
public override void Read(BitReader bitReader)
{
base.Read(bitReader);
// FIXME: SliceData above is not complete, so for now let's just skip the rest of data
Nalu.SkipToEndOfNALU(bitReader);
Nalu.CheckSize(bitReader);
}
public override void Read(BitReader bitReader)
{
base.Read(bitReader); // read-in the NALU
Header.Read(bitReader);
SliceID = bitReader.DecodeUnsignedExpGolomb(); // this is not in base class
Data.Read(bitReader);
// FIXME: SliceData above is not complete, so for now let's just skip the rest of data
Nalu.SkipToEndOfNALU(bitReader);
Nalu.CheckSize(bitReader);
}
public void Update(Nalu nal)
{
if (nal.Header.Type == NaluTypes.SPS)
{
_spsStamp = Environment.TickCount;
_sps = nal;
}
else if (nal.Header.Type == NaluTypes.PPS)
{
_ppsStamp = Environment.TickCount;
_pps = nal;
}
}
public override void Read(BitReader bitReader)
{
base.Read(bitReader); // read-in the NALU
// NOTE: this coded slice has no Header (it should remain null)
SliceID = bitReader.DecodeUnsignedExpGolomb();
if (_pps.RedundantPICCountPresentFlag)
{
RedundantPictureCount = bitReader.DecodeUnsignedExpGolomb();
}
Data.Read(bitReader);
// FIXME: SliceData above is not complete, so for now let's just skip the rest of data
Nalu.SkipToEndOfNALU(bitReader);
Nalu.CheckSize(bitReader);
}
private void buildFrame()
{
using (MemoryStream ms = new MemoryStream())
{
bool isFirst = true;
for (int i = 0; i < _nlist.Count; i++)
{
Nalu nal = _nlist[i];
if (nal.Header.Type < 13)
{
_ups_Unpacked(null, nal);
}
else
{
//由于我们自己的RTP服务只使用FU_A封包方式发送数据，因此，此处示例我们只解析此封包方式。
if (nal.Header.Type == NaluTypes.FU_A)
{
FragUnitA fua = FragUnitA.Parse(nal.NaluBytes());
////是接收序列的首包，但不是分片的首包，说明接收数据有丢失，无法正常解析。
//if (isFirst && !fua.Header.IsStart)
// return;
////是接收序列的末包，但不是分片的末包，说明接收数据有丢失，无法正常解析。
//if (i == _nlist.Count - 1 && !fua.Header.IsEnd)
// return;
if (isFirst)
{
Nalu temp = new Nalu(new NaluHeader(false, fua.Indicator.NRI, fua.Header.Type), fua.Payload);
ms.Write(temp.NaluBytes(), 0, temp.TotalBytes);
isFirst = false;
}
else
{
ms.Write(fua.Payload, 0, fua.PayloadLen);
}
}
}
}
if (ms.Length > 0)
{
_ups_Unpacked(null, Nalu.Parse(ms.ToArray()));
}
}
}
public virtual void Read(BitReader bitReader)
{
Nalu.Read(bitReader);
}
