private PlaylistSegmentBuildData CreatePlaylistSegmentBuildData(DateTime stopTime)
{
var data = new PlaylistSegmentBuildData();
data.StartTime = this.StartTime; // this.StartTime;
data.StopTime = this.StopTime ?? stopTime;
for (int i = 0; i < _playItems.Count; i++)
{
ScheduleItem item = new ScheduleItem(_playItems[i]);
if (item.ScheduleMode == PlayScheduleMode.Auto)
{
data.AddAuto(item);
}
else
{
data.InsertTiming(item);
}
}
if (_newTimingBreakItems != null)
{
var newTimingBreakList = _newTimingBreakItems.Values;
for (int i = 0; i < newTimingBreakList.Count; i++)
{
ScheduleItem item = new ScheduleItem(newTimingBreakList[i]);
data.InsertTiming(item);
}
}
return(data);
}
internal IPlaylistSegmentBuilder CreateBuilder(DateTime maxStopTime)
{
if (this.IsDirty)
{
PlaylistSegmentBuildData buildData = CreatePlaylistSegmentBuildData(maxStopTime);
return(new PlaylistSegmentBuilder(buildData));
}
else
{
return(new NullPlaylistSegmentBuilder(_playItems));
}
}
private void Build(PlaylistSegmentBuildData data)
{
ScheduleItem autoItem = null;
ScheduleItem timingBreakItem = null;
DateTime startTime = data.StartTime;
ScheduleItem timingItem = data.TakeTiming();
if (timingItem != null)
{
data.AddResult(timingItem);
startTime = timingItem.CalculatedStopTime;
}
autoItem = data.TakeAuto();
timingBreakItem = data.TakeTimingBreak();
while (startTime < data.StopTime && (autoItem != null || timingBreakItem != null))
{
if (timingBreakItem != null)
{
#region 1
if (startTime < timingBreakItem.StartTime)
{
#region 1.1
TimeSpan maxDuration = timingBreakItem.StartTime.Subtract(startTime);
if (autoItem != null)
{
autoItem.StartTime = startTime;
if (maxDuration >= autoItem.CalculatedPlayDuration)
{
data.AddResult(autoItem);
startTime = autoItem.CalculatedStopTime;
autoItem = data.TakeAuto();
}
else
{
// 分片。
ScheduleItem first = null;
ScheduleItem second = null;
autoItem.Split(maxDuration, out first, out second);
first.StartTime = startTime;
data.AddResult(first);
startTime = first.CalculatedStopTime;
autoItem = second;
}
}
else
{
// 插入自动垫片。
ScheduleItem autoPadding = CreateAutoPadding(startTime, maxDuration);
data.AddResult(autoPadding);
startTime = autoPadding.CalculatedStopTime;
}
#endregion 1.1
}
else
{
// 插入定时插播。
#region 1.2
Debug.Assert(startTime == timingBreakItem.StartTime);
data.AddResult(timingBreakItem);
startTime = timingBreakItem.CalculatedStopTime;
timingBreakItem = data.TakeTimingBreak();
#endregion 1.2
}
#endregion 1
}
else
{
#region 2
var maxDuration = data.StopTime.Subtract(startTime);
autoItem.StartTime = startTime;
if (autoItem.CalculatedPlayDuration > maxDuration)
{
// 截短。
autoItem.CalculatedPlayDuration = maxDuration;
}
data.AddResult(autoItem);
startTime = autoItem.CalculatedStopTime;
autoItem = data.TakeAuto();
#endregion 2
}
}
// startTime>=data.StopTime || (autoItem==null && timingBreakItem==null)
Debug.Assert(timingBreakItem == null);
while (autoItem != null)
{
// 完全截断。
autoItem.StartTime = data.StopTime;
autoItem.CalculatedPlayDuration = TimeSpan.Zero;
data.AddResult(autoItem);
autoItem = data.TakeAuto();
}
if (startTime < data.StopTime && data.StopTime != DateTime.MaxValue)
{
// 插入自动垫片。
ScheduleItem autoPadding = CreateAutoPadding(startTime, data.StopTime.Subtract(startTime));
data.AddResult(autoPadding);
startTime = autoPadding.CalculatedStopTime;
}
//return data.Result;
}
public PlaylistSegmentBuilder(PlaylistSegmentBuildData data)
{
this.Build(data);
_scheduleItems = data.Result;
}