/// <summary>获取某通道视频在某时段对应的有效的文件夹列表</summary>
public static DateTime[] GetFolderPaths(string videoId, int streamId, DateTime start, DateTime end)
{
List <DateTime> list = new List <DateTime>();
string path = GlobalData.VideoPath(videoId, streamId);
if (Directory.Exists(path))
{
DateTime cur = start.Date;
while (cur < end)
{
DirectoryInfo dir = new DirectoryInfo(Path.Combine(path, GlobalProcess.FolderPath(cur)));
if (dir.Exists)
{
list.Add(cur);
cur = cur.AddDays(1);
}
else if (dir.Parent.Exists)
{
cur = cur.AddDays(1);
}
else if (dir.Parent.Parent.Exists)
{
cur = new DateTime(cur.Year, cur.Month, 1).AddMonths(1);
}
else
{
cur = new DateTime(cur.Year + 1, 1, 1);
}
}
}
return(list.ToArray());
}
/// <summary>读取某通道视频在指定时间内视频流的字节数</summary>
public static long GetLength(string videoId, int streamId, DateTime beginTime, DateTime endTime, int headerLength)
{
string path = GlobalData.VideoPath(videoId, streamId);
DateTime[] dates = GetFolderPaths(videoId, streamId, beginTime, endTime);
return(getLength(path, dates, beginTime, endTime, headerLength));
}
public VideoTimePeriodsPacket Search(DateTime beginTime, DateTime endTime, IVideoInfo videoInfo)
{
string path = GlobalData.VideoPath(videoInfo.VideoId, videoInfo.StreamId);
DateTime[] dates = VideoStoragerManager.GetFolderPaths(videoInfo.VideoId, videoInfo.StreamId, beginTime, endTime);
List <TimePeriodPacket> tis = new List <TimePeriodPacket>();
Parallel.ForEach(dates, date =>
{
string folder = Path.Combine(path, GlobalProcess.FolderPath(date));
var array = FolderManager.GetTimePeriods(folder);
if (array.Length > 0)
{
lock (tis)
tis.AddRange(array);
}
});
if (endTime > DateTime.Now.Date)
{
tis.AddRange(findTodayLastest(path, endTime));
}
var timeCombines = TimePeriodManager.Combine(tis.ToArray());
var validArray = TimePeriodManager.GetIntersections(timeCombines, new TimePeriodPacket(beginTime, endTime));
return(new VideoTimePeriodsPacket(videoInfo, validArray));
}
/// <summary>获取某通道视频在某时段对应文件的首个视频头</summary>
public static VideoBasePacket GetVideoBaseInfom(string videoId, int streamId, DateTime beginTime, DateTime endTime)
{
string path = GlobalData.VideoPath(videoId, streamId);
DateTime[] dates = GetFolderPaths(videoId, streamId, beginTime, endTime);
foreach (var date in dates)
{
var header = FolderManager.GetVideoHeader(Path.Combine(path, GlobalProcess.FolderPath(date)), beginTime, endTime);
if (header != null && header.Type == DataType.SysHead)
{
long length = getLength(path, dates, beginTime, endTime, StreamPacket.Encode(header).Length + 4);
return(new VideoBasePacket(header.Buffer, header.Time, length));
}
}
return(null);
}
private static string getPath(string videoId, int streamId, DateTime time)
{
return(Path.Combine(GlobalData.VideoPath(videoId, streamId), GlobalProcess.FolderPath(time)));
}
