private MediaFrame AnalyzeNewFrame(PESPacket pes, bool isAudio)
{
MediaFrame result = null;;
if (!isAudio)
{
var esdata = pes.PES_Packet_Data;
if (_listVideoPES.Count > 0 && esdata[0] == 0 && esdata[1] == 0 && esdata[2] == 0 && esdata[3] == 1)
{
var stream = new MemoryStream();
foreach (var item in _listVideoPES)
{
stream.Write(item.PES_Packet_Data, 0, item.PES_Packet_Data.Length);
}
long tick = _listVideoPES.FirstOrDefault().GetVideoTimetick();
esdata = stream.ToArray();
var frame = CreateVideoMediaFrame(esdata, tick);
if (frame != null)
{
result = frame;
_queueFrame.Enqueue(frame);
}
_listVideoPES.Clear();
}
_listVideoPES.Add(pes);
}
else
{
//不处理音频
//var esdata = pes.PES_Packet_Data;
//if (_listAudioPES.Count > 0 && esdata[0] == 0xFF && (esdata[1] & 0xF0) == 0xF0) {
// var stream = new MemoryStream();
// foreach (var item in _listAudioPES) {
// stream.Write(item.PES_Packet_Data, 0, item.PES_Packet_Data.Length);
// }
// long tick = _listAudioPES.FirstOrDefault().GetAudioTimetick();
// esdata = stream.ToArray();
// var frame = CreateAudioMediaFrame(esdata, tick);
// _queueFrame.Enqueue(frame);
// _listAudioPES.Clear();
//}
//_listAudioPES.Add(pes);
}
return(result);
}
private void AnalyzeThead()
{
long scr = 0;
while (_isWorking)
{
bool findStartCode = false;
byte flag = 0;
lock (_lock)
{
if (ms.Length - ms.ReadPosition > 4)
{
findStartCode = ms.ReadByte() == 0x00 && ms.ReadByte() == 0x00 && ms.ReadByte() == 0x01;
if (findStartCode)
{
flag = (byte)ms.ReadByte();
if (flag == 0xBA || flag == 0xBB || flag == 0xBC || flag == 0xE0 || flag == 0xC0)
{
ms.Seek(-4, SeekOrigin.Current);
}
}
}
}
if (findStartCode)
{
try
{
switch (flag)
{
case 0xBA: //PS流包头
var ph = new PSPacketHeader(ms);
scr = ph.GetSCR();
break;
case 0xBB: //PS流系统头,有些流没有该值
new PSSystemHeader(ms);
break;
case 0xBC: //PS流map
var map = new PSMap(ms);
break;
case 0xE0: //PES包(视频)
var pesVideo = new PESPacket();
pesVideo.SetBytes(ms);
var frame = AnalyzeNewFrame(pesVideo, false);
if (frame != null)
{
frame.NTimetick = scr;
}
if (frame != null && frame.IsKeyFrame == 1)
{
lock (_lock)
ms = ms.Tolave();
}
break;
case 0xC0: //PES包(音频)
var pesAudio = new PESPacket();
pesAudio.SetBytes(ms);
AnalyzeNewFrame(pesAudio, true);
break;
case 0xBD:
byte[] lenbuf = new byte[2];
ms.Read(lenbuf, 0, 2);
var len = BitConverter.ToInt16(lenbuf, 0);
len = IPAddress.HostToNetworkOrder((short)len);
lenbuf = new byte[len];
ms.Read(lenbuf, 0, len);
break;
}
}
catch (Exception)
{
//if (_isWorking && SS.Base.AppConfig._D)
//{
// //GLib.DebugEx.WriteLog(e);
// throw;
//}
}
}
}
}
public MediaFrame NextMediaFrame()
{
var success = CheckTSPack();
if (!success)
{
return(null);
}
if (TSPackets.Count == 0)
{
return(null);
}
//验证PES包头
if (TSPackets[0].data[0] != 0 || TSPackets[0].data[1] != 0 || TSPackets[0].data[2] != 1)
{
TSPackets = new List <TSPacket>();
return(null);
}
var tmp_tspackets = TSPackets;
TSPackets = new List <TSPacket>();
var stream = new MemoryStream();
foreach (var item in tmp_tspackets)
{
stream.Write(item.data, 0, item.data.Length);
}
stream.Position = 0;
var pes = new PESPacket();
pes.SetBytes(stream);
if (IsVideo)
{
var esdata = pes.PES_Packet_Data;
//新的一帧
if (PESPackets.Count > 0 && esdata[0] == 0 && esdata[1] == 0 && esdata[2] == 0 && esdata[3] == 1)
{
stream = new MemoryStream();
foreach (var item in PESPackets)
{
stream.Write(item.PES_Packet_Data, 0, item.PES_Packet_Data.Length);
}
long tick = PESPackets.FirstOrDefault().GetVideoTimetick();
esdata = stream.ToArray();
var frame = CreateVideoMediaFrame(esdata, tick);;
PESPackets = new List <PESPacket>();
PESPackets.Add(pes);
return(frame);
}
else
{
PESPackets.Add(pes);
return(null);
}
}
else if (IsAudio)
{
var esdata = pes.PES_Packet_Data;
//新的一帧
if (PESPackets.Count > 0 && esdata[0] == 0xFF && (esdata[1] & 0xF0) == 0xF0)
{
stream = new MemoryStream();
foreach (var item in PESPackets)
{
stream.Write(item.PES_Packet_Data, 0, item.PES_Packet_Data.Length);
}
long tick = PESPackets.FirstOrDefault().GetAudioTimetick();
PESPackets = new List <PESPacket>();
PESPackets.Add(pes);
esdata = stream.ToArray();
return(CreateAudioMediaFrame(esdata, tick));
}
else
{
PESPackets.Add(pes);
return(null);
}
}
return(null);
}
public static byte[] MediaFrame2TSData(MediaFrame frame, TSProgramManage pm)
{
var msOutput = new MemoryStream();
var pes = PESPacket.MediaFrame2PES(frame);
var pes_buffer = pes.GetBytes();
var msInput = new MemoryStream(pes_buffer);
int PID = frame.IsAudio == 1 ? 257 : 258;
bool isFirstPack = true;
do
{
var payload_unit_start_indicator = 0;
var size = (int)(msInput.Length - msInput.Position);
var max_data_len = 188 - 4;//4B为包头长度
var data_len = 0;
AdaptationInfo ai = null;
if ((isFirstPack || size < max_data_len))
{
if (isFirstPack && (frame.IsAudio == 0 || true))
{
max_data_len = 188 - 4 - 8; //5B为包头长度 8B为adaptation长度
data_len = Math.Min(max_data_len, size);
var adaptation_field_length = 188 - 4 - data_len - 1; //1B为adaptation的头，这1B不算在adaptation_field_length中
var pcr_bas = (frame.NTimetick - pm.FirstFrameTimeTick) * 90; //这里为什么是*45我也不知道，
ai = new AdaptationInfo()
{
adaptation_field_length = (byte)adaptation_field_length,
random_access_indicator = 1,
PCR_flag = 1,
PCR_base = pcr_bas,
};
payload_unit_start_indicator = 1;
}
else
{
max_data_len = 188 - 4 - 1;//4B为包头长度 8B为adaptation长度
if (size < max_data_len)
{
data_len = Math.Min(max_data_len, size);
var adaptation_field_length = 188 - 4 - data_len - 1;
ai = new AdaptationInfo
{
adaptation_field_length = (byte)adaptation_field_length
};
}
else
{
payload_unit_start_indicator = 0;
data_len = size;
}
}
}
else
{
data_len = max_data_len;
}
byte[] data = new byte[data_len];
msInput.Read(data, 0, data.Length);
TSPacket pack_pat = new TSPacket()
{
sync_byte = 0x47,
transport_error_indicator = 0,
payload_unit_start_indicator = (byte)payload_unit_start_indicator,//一帧第一个packet或者这个packet需要fill字节时
transport_priority = 0,
PID = (ushort)PID,
transport_scrambling_control = 0,
adaptation_field_control = (byte)(ai != null ? 3 : 1),
continuity_counter = pm.GetCounter(PID),
AdaptationField = ai,
data = data
};
var buf = pack_pat.GetBytes();
msOutput.Write(buf, 0, buf.Length);
isFirstPack = false;
} while (msInput.Position < msInput.Length);
var result = msOutput.ToArray();
return(result);
}