// case1: 当mediaSource为null，newPlayRange不为null时只改变入出点。
// case2: 当mediaSource不为null，newPlayRange为null时等长替换媒体源。
// case3: 当mediaSource不为null，newPlayRange不为null时变长替换媒体源。
private void ChangeMediaSourceInternal(IPlayItem playItem, IMediaSource mediaSource, PlayRange?newPlayRange)
{
//if (_playlist.IsLocked(playItem)) throw new PlayItemLockedException();
if (mediaSource == null && newPlayRange == null)
{
return;
}
if (mediaSource == null && newPlayRange.Value == playItem.PlayRange)
{
return;
}
if (newPlayRange != null && (playItem.ScheduleMode == PlayScheduleMode.Timing || playItem.ScheduleMode == PlayScheduleMode.TimingBreak))
{
//_playlist.ValidateTimeRange(playItem.StartTime, newPlayRange.Value.Duration, playItem);
ValidateTimeRange(playItem.StartTime, newPlayRange.Value.Duration, playItem);
}
PlayRange playRange = newPlayRange ?? new PlayRange(TimeSpan.Zero, playItem.CalculatedPlayDuration /*playItem.PlayRange.Duration*/);
if (mediaSource == null)
{
mediaSource = playItem.MediaSource; //.Clone();
}
var newPlaySource = new PlaySource(mediaSource, playRange, playItem.CGItems);
IPlayItem newPlayItem = null;
switch (playItem.ScheduleMode)
{
case PlayScheduleMode.Timing:
newPlayItem = (IPlayItem)PlaybillItem.Timing(newPlaySource, playItem.StartTime);
break;
case PlayScheduleMode.TimingBreak:
newPlayItem = (IPlayItem)PlaybillItem.TimingBreak(newPlaySource, playItem.StartTime);
break;
case PlayScheduleMode.Auto:
newPlayItem = new AutoPlayItem(PlaybillItem.Auto(newPlaySource));
break;
}
var segment = this.FindSegment(playItem);
DateTime startTime = segment.StartTime;
int beginIndex = segment.BeginIndex;
DateTime stopTime = segment.StopTime;
int endIndex = segment.EndIndex;
Rebuild(startTime, stopTime, beginIndex, endIndex, (items) =>
{
var i = items.FindIndex(si => si.PlayItem == playItem);
items[i] = new ScheduleItem(newPlayItem);
});
}
internal void ChangePlayRange(IPlayItem playItem, PlayRange newRange)
{
int index = _playItems.IndexOf(playItem);
if (index < 0)
{
throw new ArgumentException();
}
IPlayItem newPlayItem = null;
if (playItem.ScheduleMode != PlayScheduleMode.Auto)
{
if (newRange.Duration > playItem.PlayRange.Duration)
{
var newStopTime = playItem.StartTime.Add(newRange.Duration);
if (this.HasTimingConflict(playItem.StartTime, newStopTime, playItem))
{
throw new InvalidOperationException();
}
}
newPlayItem = (IPlayItem)((TimingPlaybillItem)playItem).Clone(newRange);
}
else
{
newPlayItem = new AutoPlayItem(((AutoPlaybillItem)playItem.PlaybillItem).Clone(newRange));
}
_playItems[index] = newPlayItem;
this.IsDirty = true;
}
public void ForcePlay(IPlayItem currentItem, IPlayItem forcedItem)
{
this.Delete(forcedItem);
DateTime stopTime;
int beginIndex;
var startTime = DateTime.Now.AddSeconds(1.0);
var currentIndex = _playlist.FindIndex(i => i.PlayItem == currentItem);
beginIndex = currentIndex + 1;
Tuple <ScheduleItem, int> temp = FindFirstTiming(beginIndex, (i) => true);
int endIndex;
if (temp.Item1 != null)
{
stopTime = temp.Item1.StartTime;
endIndex = temp.Item2 - 1;
}
else
{
stopTime = DateTime.MaxValue;
endIndex = _playlist.Count - 1;
}
// 调整当前项的播放时长（入出点）
// 复制当前项，并调整时长。
var startOffset = startTime.Subtract(currentItem.StartTime);
var newRange = new PlayRange(currentItem.CalculatedPlayRange.StartPosition + startOffset,
currentItem.CalculatedPlayRange.Duration - startOffset);
var copyItem = new AutoPlayItem(new AutoPlaybillItem(currentItem.PlaybillItem.PlaySource.Clone(newRange)));
//if (segment.Head == null)
//{
// startTime = segment.StartTime;
// beginIndex = segment.BeginIndex;
//}
//else
//{
// startTime = segment.Head.CalculatedStopTime;
// beginIndex = segment.BeginIndex + 1;
//}
//stopTime = segment.StopTime;
//endIndex = segment.EndIndex;
this.Rebuild(startTime, stopTime, beginIndex, endIndex, (items) =>
{
// 插入复制项和forcedItem。
items.Insert(0, new ScheduleItem(copyItem));
items.Insert(0, new ScheduleItem(forcedItem));
});
}
public override IPlaybillItem Clone(PlayRange newRange)
{
var result = new AutoPlaybillItem(this.PlaySource.Clone(newRange));
result.IsAutoPadding = this.IsAutoPadding; // ?
result.Id = Guid.NewGuid();
return(result);
}
public PlaySource(IMediaSource mediaSource, PlayRange playRange, CGItemCollection cgItems)
: this(mediaSource, playRange)
{
if (cgItems != null)
{
this.CGItems = cgItems.Clone();
}
}
//IPlayItem IPlayItem.Clone()
//{
// return (IPlayItem)this.Clone();
//}
//protected override PlaybillItem Clone()
//{
// var result= new TimingPlaybillItem(this.PlaySource.Clone(),
// this.StartTime.Value, this.ScheduleMode == PlayScheduleMode.TimingBreak);
// result.Id = this.Id;
// return result;
//}
//public override IPlaybillItem Clone(PlayRange newRange)
//{
// throw new NotImplementedException();
//}
public override IPlaybillItem Clone(PlayRange newRange)
{
var newSource = this.PlaySource.Clone(newRange);
var result = new TimingPlaybillItem(newSource, this.StartTime.Value, this.ScheduleMode == PlayScheduleMode.TimingBreak ? true: false);
result.Id = Guid.NewGuid();
return(result);
}
internal static void ValidatePlayRange(this IMediaSource mediaSource, PlayRange playRange)
{
if (mediaSource.Duration != null)
{
if (playRange.StartPosition > mediaSource.Duration.Value || playRange.StopPosition > mediaSource.Duration.Value)
{
throw new InvalidPlayRangeException(playRange);
}
}
}
public PlaySource(IMediaSource mediaSource, PlayRange playRange)
{
if (mediaSource.Duration != null)
{
PlayoutUtils.ValidatePlayDuration(playRange.Duration);
}
//mediaSource.ValidatePlayRange(playRange);
this.MediaSource = mediaSource;
this.PlayRange = playRange;
}
public IPlaySource Clone(PlayRange newRange)
{
var result = new PlaySource(this.MediaSource, newRange);
if (this.CGItems != null)
{
result.CGItems = this.CGItems.Clone();
}
return(result);
}
/// <summary>
/// 变长替换媒体源。
/// </summary>
/// <param name="playItem"></param>
/// <param name="mediaItem"></param>
public void ChangeMediaSource(IPlayItem playItem, IMediaSource mediaSource, PlayRange playRange)
{
this.ChangeMediaSourceInternal(playItem, mediaSource, playRange);
}
public abstract IPlaybillItem Clone(PlayRange newRange);
public PlayRange?Adjust(PlayRange playRange)
{
return(new PlayRange(playRange.Duration));
}
public PlayRange?Adjust(PlayRange playRange)
{
throw new NotSupportedException();
}
public InvalidPlayRangeException(PlayRange playRange)
{
this.PlayRange = playRange;
}
// 用于创建顺播片断。
private AutoPlayItem(IPlaybillItem billItem, PlayRange playRange) : this(billItem)
{
this.PlayRange = playRange;
}
public MediaItem(IMediaSource source, PlayRange playRange)
{
source.ValidatePlayRange(playRange);
this.Source = source;
this.PlayRange = playRange;
}
/// <summary>
/// 修改媒体源的入出点。
/// </summary>
/// <param name="playItem"></param>
/// <param name="newRange"></param>
public void ChangePlayRange(IPlayItem playItem, PlayRange newRange)
{
this.ChangeMediaSourceInternal(playItem, null, newRange);
}