public static byte[] Encode(IndexesPacket data)
{
using (MemoryStream ms = new MemoryStream())
{
PacketBase.WriteBytes(ms, data.BeginTime);
PacketBase.WriteBytes(ms, data.EndTime);
PacketBase.WriteBytes(ms, data.StartIndex);
return(ms.ToArray());
}
}
private static List <IndexesPacket> readIndexesDatas(Stream fs)
{
List <IndexesPacket> indexesDatas = new List <IndexesPacket>();
while (fs != null && fs.Position < fs.Length)
{
byte[] buffer = readStream(fs);
var data = IndexesPacket.Decode(buffer);
indexesDatas.Add(data);
}
return(indexesDatas);
}
private void writeToIndexes(DateTime curTime)
{
if (_fsIndexes != null && _keyStartPosition >= 0 && curTime >= _keyStartTime)
{
IndexesPacket indexesData = new IndexesPacket(_keyStartTime, curTime, _keyStartPosition);
byte[] bytes = IndexesPacket.Encode(indexesData);
writeBuffer(_fsIndexes, bytes);
_keyStartPosition = -1;
_keyStartTime = DateTime.MaxValue;
_fsStream.Flush();
_fsIndexes.Flush();
}
}
/// <summary>
/// 获取路径下指定时间点对应的视频流信息
/// </summary>
/// <param name="path"></param>
/// <param name="time"></param>
/// <returns></returns>
public static VideoStreamsPacket GetVideoStreamsPacket(string path, DateTime time)
{
string indexesFileName = null;
IndexesPacket indexesPacket = GetIndexesPacket(path, time, ref indexesFileName);
if (indexesPacket != null && indexesFileName != null)
{
string videoFile = GlobalProcess.GetRecFileName(indexesFileName);
StreamPacket[] streamPacket = FileManager.GetStreamPacket(videoFile, indexesPacket.StartIndex);
return(new VideoStreamsPacket(indexesPacket, streamPacket));
}
Logger.Default.Trace("{0} 未找到 {1} 对应的索引文件! {2}", path, time, indexesFileName);
return(null);
}