public byte[] CreatePES(JT1078Package jt1078Package, int minBufferSize = 188)
{
//将1078一帧的数据拆分成一小段一小段的PES包
byte[] buffer = TSArrayPool.Rent(jt1078Package.Bodies.Length + minBufferSize);
TSMessagePackWriter messagePackReader = new TSMessagePackWriter(buffer);
//TSHeader + Adaptation + PES1
//TSHeader + PES2
//TSHeader + Adaptation + PESN
try
{
int totalLength = 0;
TS_Package package = new TS_Package();
package.Header = new TS_Header();
//ts header 4
totalLength += 4;
package.Header.PID = 256;
package.Header.PackageType = PackageType.Data_Start;
string key = jt1078Package.GetKey();
if (VideoCounter.TryGetValue(key, out byte counter))
{
if (counter > 0xf)
{
counter = 0;
}
}
else
{
VideoCounter.Add(key, counter);
}
package.Header.ContinuityCounter = counter;
counter++;
package.Header.PayloadUnitStartIndicator = 1;
package.Header.Adaptation = new TS_AdaptationInfo();
package.Payload = new PES_Package();
package.Payload.StreamId = 0xe0;
package.Payload.PESPacketLength = 0;
//PESStartCode + StreamId+ Flag1 + PTS_DTS_Flag + PESPacketLength
//3 + 1 + 1 + 1 + 2
totalLength += (3 + 1 + 1 + 1 + 2);
package.Payload.PTS_DTS_Flag = PTS_DTS_Flags.all;
long timestamp = (long)jt1078Package.Timestamp;
if (jt1078Package.Label3.DataType == JT1078DataType.视频I帧)
{
//ts header adaptation
//PCRIncluded + Timestamp
//1 + 6
totalLength += (1 + 6);
package.Header.Adaptation.PCRIncluded = PCRInclude.包含;
package.Header.Adaptation.Timestamp = timestamp;
package.Payload.DTS = timestamp * H264DefaultHZ;
package.Payload.PTS = package.Payload.DTS + jt1078Package.LastIFrameInterval * H264DefaultHZ;
}
else if (jt1078Package.Label3.DataType == JT1078DataType.视频P帧)
{
//ts header adaptation
//PCRIncluded
//1
totalLength += 1;
package.Header.Adaptation.PCRIncluded = PCRInclude.包含;
package.Payload.DTS = timestamp * H264DefaultHZ;
package.Payload.PTS = package.Payload.DTS + jt1078Package.LastFrameInterval * H264DefaultHZ;
}
//Flag1 + PTS_DTS_Flag + DTS + PTS
//1 + 1 + 5 + 5 = 12
totalLength += 12;
totalLength += TSConstants.FiexdESPackageHeaderLength;
//根据计算剩余的长度进行是否需要填充第一包
var remainingLength = FiexdTSLength - totalLength;
int index = 0;
//情况1:1078的第一包不够剩余(remainingLength)字节
//情况2:1078的第一包比剩余(remainingLength)字节多
//情况3: 1078的第一包等于剩余(remainingLength)字节
//填充大小
int fullSize = jt1078Package.Bodies.Length - remainingLength;
package.Payload.Payload = new ES_Package();
if (fullSize < 0)
{
//这个很重要，需要控制
package.Header.AdaptationFieldControl = AdaptationFieldControl.时带有自适应域和有效负载;
//还差一点
fullSize = Math.Abs(fullSize);
package.Header.Adaptation.FillSize = (byte)fullSize;
package.Payload.Payload.NALUs = new List <byte[]>()
{
jt1078Package.Bodies
};
package.ToBuffer(ref messagePackReader);
}
else if (fullSize == 0)
{
//这个很重要，需要控制
package.Header.AdaptationFieldControl = AdaptationFieldControl.无自适应域_仅含有效负载;
//刚刚好
package.Header.Adaptation.FillSize = 0;
package.Payload.Payload.NALUs = new List <byte[]>()
{
jt1078Package.Bodies
};
package.ToBuffer(ref messagePackReader);
}
else
{
//这个很重要，需要控制
package.Header.AdaptationFieldControl = AdaptationFieldControl.时带有自适应域和有效负载;
//太多了，需要拆分
package.Header.Adaptation.FillSize = 0;
package.Payload.Payload.NALUs = new List <byte[]>();
ReadOnlySpan <byte> dataReader = jt1078Package.Bodies;
package.Payload.Payload.NALUs.Add(dataReader.Slice(index, remainingLength).ToArray());
index += remainingLength;
package.ToBuffer(ref messagePackReader);
while (index != jt1078Package.Bodies.Length)
{
if (counter > 0xf)
{
counter = 0;
}
int segmentFullSize = jt1078Package.Bodies.Length - index;
if (segmentFullSize >= FiexdSegmentPESLength)
{
CreateSegmentPES(ref messagePackReader, dataReader.Slice(index, FiexdSegmentPESLength).ToArray(), counter);
index += FiexdSegmentPESLength;
}
else
{
var nalu = dataReader.Slice(index, segmentFullSize).ToArray();
//当等于183字节的时候
//12698D08E8DBDBCDF6C6FA19DD88490E908D687D1755BE87DF82754BE2D245270569310B3030A4904DF1883ED09A68CA1C79BC4B97642B5BC095A55E56868D05370D3BC8B7B60B4642A486B6852656C01FFADACEF4BD4320E8BE9C54D44177A433CC37493FA1D8ACD0164E92454D03B6EC0617B133AEF43B599BF85632AB9B5FF671F0DDAA07E8F279F5639BA88E3FFFFCE1D3351FAF43DF23BCEB7E3B2CAB3EABAED23B25097B7F51FF38E8D0EBAB589CEC42B0440EB8
//if (jt1078Package.Label3.DataType == JT1078DataType.视频P帧)
//{
// string hex = dataReader.Slice(index, segmentFullSize).ToArray().ToHexString();
//}
CreateSegmentPES(ref messagePackReader, dataReader.Slice(index, segmentFullSize).ToArray(), counter);
index += segmentFullSize;
}
counter++;
}
}
VideoCounter[key] = counter;
return(messagePackReader.FlushAndGetArray());
}
finally
{
TSArrayPool.Return(buffer);
}
}
public byte[] CreatePES(JT1078Package jt1078Package, int minBufferSize = 188)
{
//将1078一帧的数据拆分成一小段一小段的PES包
byte[] buffer = TSArrayPool.Rent(jt1078Package.Bodies.Length + minBufferSize);
TSMessagePackWriter messagePackReader = new TSMessagePackWriter(buffer);
//TSHeader + Adaptation + PES1
//TSHeader + PES2
//TSHeader + Adaptation + PESN
try
{
int totalLength = 0;
TS_Package package = new TS_Package();
package.Header = new TS_Header();
//ts header 4
totalLength += 4;
package.Header.PID = 256;
string key = jt1078Package.GetKey();
if (VideoCounter.TryGetValue(key, out byte counter))
{
if (counter > 0xf)
{
counter = 0;
}
package.Header.ContinuityCounter = counter++;
VideoCounter.TryUpdate(key, counter, counter);
}
else
{
package.Header.ContinuityCounter = counter++;
VideoCounter.TryAdd(key, counter);
}
package.Header.PayloadUnitStartIndicator = 1;
package.Header.Adaptation = new TS_AdaptationInfo();
package.Payload = new PES_Package();
package.Payload.StreamId = 0xe0;
package.Payload.PESPacketLength = 0;
//PESStartCode + StreamId + PESPacketLength
//3 + 1 + 2
totalLength += (3 + 1 + 2);
package.Payload.PTS_DTS_Flag = PTS_DTS_Flags.all;
if (jt1078Package.Label3.DataType == JT1078DataType.视频I帧)
{
//ts header adaptation
//PCRIncluded + PCR
//1 + 5
totalLength += (1 + 5);
package.Header.Adaptation.PCRIncluded = PCRInclude.包含;
package.Header.Adaptation.PCR = jt1078Package.LastIFrameInterval;
package.Payload.DTS = jt1078Package.LastIFrameInterval;
package.Payload.PTS = jt1078Package.LastIFrameInterval;
}
else
{
//ts header adaptation
//PCRIncluded
//1
totalLength += 1;
package.Header.Adaptation.PCRIncluded = PCRInclude.包含;
package.Payload.DTS = jt1078Package.LastFrameInterval;
package.Payload.PTS = jt1078Package.LastFrameInterval;
}
//Flag1 + PTS_DTS_Flag + DTS + PTS
//1 + 1 + 5 + 5
totalLength += 12;
//根据计算剩余的长度进行是否需要填充第一包
var remainingLength = FiexdTSLength - totalLength;
int index = 0;
//情况1:1078的第一包不够剩余(remainingLength)字节
//情况2:1078的第一包比剩余(remainingLength)字节多
//情况3: 1078的第一包等于剩余(remainingLength)字节
//填充大小
int fullSize = jt1078Package.Bodies.Length - remainingLength;
package.Payload.Payload = new ES_Package();
if (fullSize < 0)
{
//这个很重要，需要控制
package.Header.AdaptationFieldControl = AdaptationFieldControl.时带有自适应域和有效负载;
//还差一点
fullSize = Math.Abs(fullSize);
package.Header.Adaptation.FillSize = (byte)fullSize;
package.Payload.Payload.NALUs = new List <byte[]>()
{
jt1078Package.Bodies
};
package.ToBuffer(ref messagePackReader);
}
else if (fullSize == 0)
{
//这个很重要，需要控制
package.Header.AdaptationFieldControl = AdaptationFieldControl.无自适应域_仅含有效负载;
//刚刚好
package.Header.Adaptation.FillSize = 0;
package.Payload.Payload.NALUs = new List <byte[]>()
{
jt1078Package.Bodies
};
package.ToBuffer(ref messagePackReader);
}
else
{
//这个很重要，需要控制
package.Header.AdaptationFieldControl = AdaptationFieldControl.时带有自适应域和有效负载;
//太多了，需要拆分
package.Header.Adaptation.FillSize = 0;
package.Payload.Payload.NALUs = new List <byte[]>();
ReadOnlySpan <byte> dataReader = jt1078Package.Bodies;
package.Payload.Payload.NALUs.Add(dataReader.Slice(index, remainingLength).ToArray());
index += remainingLength;
package.ToBuffer(ref messagePackReader);
while (index != jt1078Package.Bodies.Length)
{
if (counter > 0xf)
{
counter = 0;
}
int segmentFullSize = jt1078Package.Bodies.Length - index;
if (segmentFullSize >= FiexdSegmentPESLength)
{
CreateSegmentPES(ref messagePackReader, dataReader.Slice(index, FiexdSegmentPESLength).ToArray(), counter++);
}
else
{
CreateSegmentPES(ref messagePackReader, dataReader.Slice(index, segmentFullSize).ToArray(), counter++);
index += segmentFullSize;
}
}
VideoCounter.TryUpdate(key, counter, counter);
}
return(messagePackReader.FlushAndGetArray());
}
finally
{
TSArrayPool.Return(buffer);
}
}
