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);
}
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.nIsKeyFrame == 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 e)
{
//if (_isWorking && SLW.Base.AppConfig._D)
//{
// //GLib.DebugEx.WriteLog(e);
// throw;
//}
}
}
}
}