/// <inheritdoc />
protected override void ExecuteCycleLogic(CancellationToken ct)
{
// Update Status Properties
var main = Container.Components.MainMediaType;
var all = MediaCore.Renderers.Keys.ToArray();
var currentBlock = new MediaTypeDictionary <MediaBlock>();
if (HasInitialized == false)
{
// wait for main component blocks or EOF or cancellation pending
if (MediaCore.Blocks[main].Count <= 0)
{
return;
}
// Set the initial clock position
MediaCore.ChangePosition(MediaCore.Blocks[main].RangeStartTime);
// Wait for renderers to be ready
foreach (var t in all)
{
MediaCore.Renderers[t]?.WaitForReadyState();
}
// Mark as initialized
HasInitialized.Value = true;
}
#region Run the Rendering Cycle
try
{
// TODO: wait for active seek command
try { Commands.WaitForSeekBlocks(ct); }
catch { return; }
#region 2. Handle Block Rendering
// capture the wall clock for this cycle
var wallClock = MediaCore.WallClock;
// Capture the blocks to render
foreach (var t in all)
{
// Get the audio, video, or subtitle block to render
currentBlock[t] = t == MediaType.Subtitle && MediaCore.PreloadedSubtitles != null ?
MediaCore.PreloadedSubtitles[wallClock] :
MediaCore.Blocks[t][wallClock];
}
// Render each of the Media Types if it is time to do so.
foreach (var t in all)
{
// Skip rendering for nulls
if (currentBlock[t] == null || currentBlock[t].IsDisposed)
{
continue;
}
// Render by forced signal (TimeSpan.MinValue) or because simply it is time to do so
if (MediaCore.LastRenderTime[t] == TimeSpan.MinValue || currentBlock[t].StartTime != MediaCore.LastRenderTime[t])
{
SendBlockToRenderer(currentBlock[t], wallClock);
}
}
#endregion
#region 3. Finalize the Rendering Cycle
// Call the update method on all renderers so they receive what the new wall clock is.
foreach (var t in all)
{
MediaCore.Renderers[t]?.Update(wallClock);
}
#endregion
}
catch (Exception ex)
{
MediaCore.LogError(Aspects.RenderingWorker, "Error while in rendering worker cycle", ex);
throw;
}
finally
{
// Check End of Media Scenarios
if (MediaCore.HasDecodingEnded &&
Commands.IsSeeking == false &&
MediaCore.WallClock >= MediaCore.LastRenderTime[main] &&
MediaCore.WallClock >= MediaCore.Blocks[main].RangeEndTime)
{
// Rendered all and nothing else to render
if (State.HasMediaEnded == false)
{
MediaCore.Clock.Pause();
var endPosition = MediaCore.ChangePosition(MediaCore.Blocks[main].RangeEndTime);
State.UpdateMediaEnded(true, endPosition);
State.UpdateMediaState(PlaybackStatus.Stop);
foreach (var mt in Container.Components.MediaTypes)
{
MediaCore.InvalidateRenderer(mt);
}
}
}
else
{
State.UpdateMediaEnded(false, TimeSpan.Zero);
}
// Update the Position
if (!ct.IsCancellationRequested)
{
State.UpdatePosition();
}
}
#endregion
}
/// <inheritdoc />
protected override void ExecuteCycleLogic(CancellationToken ct)
{
// Update Status Properties
var main = Container.Components.MainMediaType;
var all = MediaCore.Renderers.Keys.ToArray();
var currentBlock = new MediaTypeDictionary <MediaBlock>();
if (HasInitialized == false)
{
// wait for main component blocks or EOF or cancellation pending
if (MediaCore.Blocks[main].Count <= 0)
{
return;
}
// Set the initial clock position
MediaCore.ChangePosition(MediaCore.Blocks[main].RangeStartTime);
// Wait for renderers to be ready
foreach (var t in all)
{
MediaCore.Renderers[t]?.WaitForReadyState();
}
// Mark as initialized
HasInitialized.Value = true;
}
#region Run the Rendering Cycle
try
{
#region 1. Wait for any seek operation to make blocks available in a loop
while (!ct.IsCancellationRequested &&
Commands.IsActivelySeeking &&
!MediaCore.Blocks[main].IsInRange(MediaCore.WallClock))
{
// Check if we finally have seek blocks available
// if we don't get seek blocks in range and we are not step-seeking,
// then we simply break out of the loop and render whatever it is we have
// to create the illussion of smooth seeking. For precision seeking we
// continue the loop.
if (!Commands.WaitForSeekBlocks(DefaultPeriod.Milliseconds) &&
Commands.ActiveSeekMode == CommandManager.SeekMode.Normal)
{
break;
}
}
#endregion
#region 2. Handle Block Rendering
// Capture the blocks to render at a fixed wall clock position
// so all blocks are aligned to the same timestamp
var wallClock = MediaCore.WallClock;
foreach (var t in all)
{
// skip blocks if we are seeking and they are not video blocks
if (Commands.IsSeeking && t != MediaType.Video)
{
currentBlock[t] = null;
continue;
}
// Get the audio, video, or subtitle block to render
currentBlock[t] = t == MediaType.Subtitle && MediaCore.PreloadedSubtitles != null ?
MediaCore.PreloadedSubtitles[wallClock] :
MediaCore.Blocks[t][wallClock];
}
// Render each of the Media Types if it is time to do so.
foreach (var t in all)
{
// Don't send null blocks to renderer
if (currentBlock[t] == null || currentBlock[t].IsDisposed)
{
continue;
}
// Render by forced signal (TimeSpan.MinValue) or because simply it is time to do so
if (MediaCore.LastRenderTime[t] == TimeSpan.MinValue || currentBlock[t].StartTime != MediaCore.LastRenderTime[t])
{
SendBlockToRenderer(currentBlock[t], wallClock);
}
}
#endregion
#region 3. Finalize the Rendering Cycle
// Call the update method on all renderers so they receive what the new wall clock is.
foreach (var t in all)
{
MediaCore.Renderers[t]?.Update(wallClock);
}
#endregion
}
catch (Exception ex)
{
MediaCore.LogError(Aspects.RenderingWorker, "Error while in rendering worker cycle", ex);
throw;
}
finally
{
// Check End of Media Scenarios
if (Commands.IsSeeking == false &&
MediaCore.HasDecodingEnded &&
MediaCore.WallClock >= MediaCore.LastRenderTime[main] &&
MediaCore.WallClock >= MediaCore.Blocks[main].RangeEndTime)
{
// Rendered all and nothing else to render
if (State.HasMediaEnded == false)
{
MediaCore.Clock.Pause();
var endPosition = MediaCore.ChangePosition(MediaCore.Blocks[main].RangeEndTime);
State.UpdateMediaEnded(true, endPosition);
State.UpdateMediaState(PlaybackStatus.Stop);
foreach (var mt in Container.Components.MediaTypes)
{
MediaCore.InvalidateRenderer(mt);
}
}
}
else
{
State.UpdateMediaEnded(false, TimeSpan.Zero);
}
// Update the Position
if (!ct.IsCancellationRequested && Commands.IsSeeking == false)
{
State.UpdatePosition();
}
}
#endregion
}
