public AmazonDriveSeekableStream(AmazonDrive Drive, FileMetadata_Info downitem) : base()
{
this.Drive = Drive;
targetItem = downitem;
FileSize = targetItem.OrignalLength ?? 0;
if (FileSize <= 0)
{
return;
}
slots = new SlotMaster(Drive, downitem, cts.Token);
_Position = 0;
if (downitem.contentProperties?.size > ConfigAPI.FilenameChangeTrickSize && !Regex.IsMatch(downitem.name, "^[\x20-\x7e]*$"))
{
OrgFilename = downitem.name;
Config.Log.LogOut("AmazonDriveSeekableStream : <BIG FILE> temporary filename change");
Config.Log.LogOut("AmazonDriveSeekableStream : orgnal name : " + OrgFilename);
Drive.renameItem(downitem.id, ConfigAPI.temporaryFilename + downitem.id).Wait();
}
lastslot = ((downitem.OrignalLength ?? 0) - 1) / AmazonDriveStreamConfig.slotsize;
lockslot1 = AmazonDriveStreamConfig.lockslotfirstnum;
lockslot2 = lastslot - AmazonDriveStreamConfig.lockslotlastnum;
if (lockslot2 < lockslot1)
{
lockslot2 = lockslot1;
}
slots.CreateTask(0);
slots.CreateTask(lockslot2);
slots.CreateTask(lockslot1);
slots.CreateTask(lockslot1 + AmazonDriveStreamConfig.preforwardnum);
}
public SlotTask(AmazonDrive Drive, FileMetadata_Info targetItem, CancellationToken ct = default(CancellationToken))
{
cts = CancellationTokenSource.CreateLinkedTokenSource(ct, Internal_cts.Token);
this.Drive = Drive;
this.targetItem = targetItem;
lastslot = ((targetItem.OrignalLength ?? 0) - 1) / AmazonDriveStreamConfig.slotsize;
}
public SlotMaster(AmazonDrive Drive, FileMetadata_Info downitem, CancellationToken ct = default(CancellationToken))
{
cts = CancellationTokenSource.CreateLinkedTokenSource(cts_internal.Token, ct);
this.Drive = Drive;
targetItem = downitem;
lastslot = ((downitem.OrignalLength ?? 0) - 1) / AmazonDriveStreamConfig.slotsize;
lockslot1 = AmazonDriveStreamConfig.lockslotfirstnum;
lockslot2 = lastslot - AmazonDriveStreamConfig.lockslotlastnum;
if (lockslot2 < lockslot1)
{
lockslot2 = lockslot1;
}
int extraslot = 0;
Task.Run(() =>
{
foreach (var newitem in SlotBuffer.GetConsumingEnumerable(cts.Token))
{
try
{
slot.GetOrAdd(newitem.Key, newitem.Value);
while (slot.Count > AmazonDriveStreamConfig.slotbacklog + extraslot)
{
Task.Delay(100, cts.Token).Wait(cts.Token);
}
if (cts.Token.IsCancellationRequested)
{
return;
}
}
catch { }
}
}, cts.Token);
Task.Run(() =>
{
while (!cts.Token.IsCancellationRequested)
{
try
{
const int slotnumc = AmazonDriveStreamConfig.slotbacklog;
// slotが多すぎるのでいらないものから消す
if (slot.Count > slotnumc)
{
var pos = slot
.OrderByDescending(x => x.Value.Age)
.OrderBy(x => x.Value.ReadAge)
.First().Key;
var s = StartLock;
if (s != null)
{
pos = s.Value;
}
//Config.Log.LogOut(string.Format("AmazonDriveStream : Removing slots current pos {0}", pos));
var deleteitem = slot
.Where(x => !(x.Key >= StartLock && x.Key <= EndLock))
.Where(x => x.Key > lockslot1 && x.Key < lockslot2);
deleteitem = deleteitem
.Where(x => x.Key <pos - AmazonDriveStreamConfig.slotkeepold || x.Key> pos + AmazonDriveStreamConfig.slotbacklog * 2)
.OrderByDescending(x => x.Value.ReadAge)
.Take(slot.Count - slotnumc).ToArray();
foreach (var item in deleteitem)
{
MemoryStreamSlot o;
if (slot.TryRemove(item.Key, out o))
{
//Config.Log.LogOut(string.Format("AmazonDriveStream : Remove slot {0} pos {1:#,0} len {2:#,0}", item.Key, o.Offset, o.Length));
if (!(item.Key >= StartLock && item.Key <= EndLock))
{
o.Dispose();
}
else
{
slot.GetOrAdd(item.Key, o);
}
}
}
extraslot = slot.Count - slotnumc;
}
// 終了したタスクを除去する
if (Tasks.Any(x => x.Done))
{
var deleteitem = Tasks.Where(x => x.Done).ToArray();
foreach (var item in deleteitem)
{
SlotTask o;
if (Tasks.TryTake(out o))
{
//Config.Log.LogOut(string.Format("AmazonDriveStream : Remove end Task slot {0}", o.ReadingSlotno));
o.Dispose();
}
}
}
// 走りすぎているスレットを消す
if (accesslog.Count() > 0)
{
var min_point = accesslog.OrderByDescending(x => x.Value).Take(1).Min(x => x.Key);
var max_point = min_point + AmazonDriveStreamConfig.slotbacklog;
min_point = Math.Max(min_point - AmazonDriveStreamConfig.slotnearby * 2, 0);
max_point = Math.Min(max_point + AmazonDriveStreamConfig.slotnearby * 2, lastslot);
//Config.Log.LogOut(string.Format("AmazonDriveStream : min_point {0}", min_point));
//Config.Log.LogOut(string.Format("AmazonDriveStream : max_point {0}", max_point));
if (min_point < lockslot2 && Tasks.Any(x => x.ReadingSlotno < min_point && x.ReadingSlotno > lockslot1))
{
var deleteitem = Tasks.Where(x => x.ReadingSlotno <min_point && x.ReadingSlotno> lockslot1).ToList();
SlotTask o;
while (deleteitem.Count > 0 && Tasks.TryTake(out o))
{
if (deleteitem.Contains(o))
{
//Config.Log.LogOut(string.Format("AmazonDriveStream : Remove1 Task slot {0} too far({1})", o.ReadingSlotno, min_point));
deleteitem.Remove(o);
o.Dispose();
}
else
{
Tasks.Add(o);
}
}
}
if (Tasks.Count == 1)
{
Tasks.First().leadThread = true;
}
else
{
foreach (var item in Tasks)
{
item.leadThread = false;
}
}
if (max_point > lockslot1 && Tasks.Any(x => x.ReadingSlotno > max_point && x.ReadingSlotno < lockslot2))
{
var deleteitem = Tasks.Where(x => x.ReadingSlotno > max_point && x.ReadingSlotno < lockslot2).ToList();
SlotTask o;
while (deleteitem.Count > 0 && Tasks.TryTake(out o))
{
if (deleteitem.Contains(o))
{
if (o.leadThread)
{
//Config.Log.LogOut(string.Format("AmazonDriveStream : LeadThread Task slot {0} too far({1})", o.ReadingSlotno, min_point));
deleteitem.Remove(o);
Tasks.Add(o);
}
else
{
//Config.Log.LogOut(string.Format("AmazonDriveStream : Remove2 Task slot {0} too far({1})", o.ReadingSlotno, min_point));
deleteitem.Remove(o);
o.Dispose();
}
}
else
{
Tasks.Add(o);
}
}
}
}
}
catch { }
//Config.Log.LogOut(string.Format("AmazonDriveStream : Tasks {0} slots {1}", Tasks.Count, slot.Count));
//Config.Log.LogOut(string.Format("AmazonDriveStream : slot {0}", string.Join(",",Tasks.Select(x=>x.ReadingSlotno.ToString()))));
Task.Delay(500, cts.Token).Wait(cts.Token);
}
}, cts.Token);
}
