In This Topic ▼

MediaEventCode Enumeration

Summary

Defines values used for media event reporting.

Syntax

C++/CLI

public enum MediaEventCode

public enum class MediaEventCode

Members

Value	Member	Description
1	EC_COMPLETE	Indicates the completed playback of a stream within the graph.
2	EC_USERABORT	Indicates that the user has requested that playback be terminated.
3	EC_ERRORABORT	Operation aborted because of error.
4	EC_TIME	Indicates that the requested reference time occurred. (currently unused)
5	EC_REPAINT	Indicates that a repaint is required.
6	EC_STREAM_ERROR_STOPPED	Indicates that a stream error occurs that stopped playback.
7	EC_STREAM_ERROR_STILLPLAYING	Indicates that a stream error occurred, but playback has continued.
8	EC_ERROR_STILLPLAYING	Indicates that an asynchronous run command was sent to the graph when the graph was already running.
9	EC_PALETTE_CHANGED	Indicates that the video palette has changed.
10	EC_VIDEO_SIZE_CHANGED	Indicates that the video size has changed.
11	EC_QUALITY_CHANGE	Indicates that playback quality degradation has occurred.
12	EC_SHUTTING_DOWN	Notifies IMediaEventSink filters that the filter graph is preparing to shutdown.
13	EC_CLOCK_CHANGED	Indicates that the clock has changed.
14	EC_PAUSED	Indicates that the previous pause request has completed.
16	EC_OPENING_FILE	Indicates that a file is being opened.
17	EC_BUFFERING_DATA	Indicates that the filter graph is buffering data.
18	EC_FULLSCREEN_LOST	Indicates that full screen mode was toggled off.
19	EC_ACTIVATE	Indicates that a video renderer has lost or gained activation.
20	EC_NEED_RESTART	Indicates that a renderer has regained a resource and the graph will be restarted.
21	EC_WINDOW_DESTROYED	Indicates that a video window for a video renderer has been destroyed.
22	EC_DISPLAY_CHANGED	Indicates that a video renderer has detected a display change.
23	EC_STARVATION	Indicates that a filter in the graph has detected starvation (not enough data to properly render).
24	EC_OLE_EVENT	Indicates that the filter is sending a text string to the application. This is useful for detecting Windows Media Script events that were added with the WMScript object. For Windows Media Script events, param1 is a BSTR containing the command name while param2 is a BSTR containing the command string.
25	EC_NOTIFY_WINDOW	Indicates that the window handle is being passed to a filter.
26	EC_STREAM_CONTROL_STOPPED	Indicates that an earlier call to IAMStreamControl.StopAt has now taken effect.
27	EC_STREAM_CONTROL_STARTED	Indicates that an earlier call to IAMStreamControl.StartAt has now taken effect.
28	EC_END_OF_SEGMENT	Indicates that a segment end has been reached.
29	EC_SEGMENT_STARTED	Indicates that a segment start has been reached.
30	EC_LENGTH_CHANGED	Indicates that the length of the "file" has changed.
31	EC_DEVICE_LOST	Indicates that a device has been lost, see IAMDeviceRemoval interface for more information.
32	EC_SAMPLE_NEEDED	Indicates that a sample is needed on the specified input pin.
33	EC_PROCESSING_LATENCY	Indicates the current latency (processing time) for the related filter.
34	EC_SAMPLE_LATENCY	Indicates that the filter is the specified amount of time behind or ahead in processing incoming samples.
35	EC_SCRUB_TIME	Indicates the timestamp for the sample frame displayed after an EC_STEP_COMPLETE notification.
36	EC_STEP_COMPLETE	Indicates that a step request has completed or was cancelled.
37	EC_SKIP_FRAMES	Indicates to the filter graph to skip some frames and notify.
48	EC_TIMECODE_AVAILABLE	Indicates that a filter has timecodes available.
49	EC_EXTDEVICE_MODE_CHANGE	Indicates that a filter supporting the IAMExtDevice interface has detected a device mode change.
50	EC_STATE_CHANGE	Indicates state changes in the filter graph.
64	EC_PLEASE_REOPEN	Indicates that changes have been made that require a graph to be re-rendered.
65	EC_STATUS	Indicates that a filter is sending status message strings.
66	EC_MARKER_HIT	Indicates that the specified "marker #" has just been passed.
67	EC_LOADSTATUS	This event is sent by certain filters to indicate the progress of a load operation. param1 has more information on the type of notification. LEAD filters will set param1 to one of the values in the LoadStatusEventCode enumeration. See LoadStatusEventCode for more information on the events sent by the LEAD MPEG-2 Transport Demultiplexer and LEAD MPEG-2 Transport UDP Source filters.
68	EC_FILE_CLOSED	Indicates that a file was involuntarily closed, i.e. by a network server shutdown.
69	EC_ERRORABORTEX	Indicates that an operation aborted because of error.
70	EC_EOS_SOON	Indicates that the source filter is about to deliver an EOS downstream.
71	EC_CONTENTPROPERTY_CHANGED	Indicates that a streaming media filter received a change in stream description information.
72	EC_BANDWIDTHCHANGE	Indicates that the bandwidth of the streaming data has changed.
73	EC_VIDEOFRAMEREADY	Indicates that the first video frame is about to be drawn.
80	EC_GRAPH_CHANGED	Indicates that the filter graph has changed.
81	EC_CLOCK_UNSET	Indicates to the filter graph to unset the current graph clock.
83	EC_VMR_RENDERDEVICE_SET	Indicates the type of rendering mechanism the VMR is using to display video.
84	EC_VMR_SURFACE_FLIPPED	Indicates that the VMR's allocator-presenter has called the DDraw flip API on the surface being presented.
85	EC_VMR_RECONNECTION_FAILED	Indicates that an upstream decoder tried to perform a dynamic format change and the VMR was unable to accept the new format.
86	EC_PREPROCESS_COMPLETE	Indicates that a WM ASF writer filter (WMSDK V9 version) has signaled the completion of a pre-process run when running in multipass encoding mode.
87	EC_CODECAPI_EVENT	Indicates that the Codec API event was encountered.
257	EC_DVD_DOMAIN_CHANGE	The DVD domain is changed.
258	EC_DVD_TITLE_CHANGE	The DVD current title has changed.
259	EC_DVD_CHAPTER_START	The player has started playing a new chapter The name for each individual video file on a DVD.
260	EC_DVD_AUDIO_STREAM_CHANGE	The audio stream The portion of the file holding the audio data.
261	EC_DVD_SUBPICTURE_STREAM_CHANGE	The DVD sub-picture stream number has changed.
262	EC_DVD_ANGLE_CHANGE	The number of available angles is changed or the current angle number is changed.
263	EC_DVD_BUTTON_CHANGE	The number of available buttons is changed or the currently selected button number is changed.
264	EC_DVD_VALID_UOPS_CHANGE	The available set of DVDControl interface methods has changed.
265	EC_DVD_STILL_ON	Beginning of a still (PGC, Cell, or VOBU).
266	EC_DVD_STILL_OFF	End of a still (PGC, Cell, or VOBU).
267	EC_DVD_CURRENT_TIME	The beginning of every video object unit, a video segment that is 0.
268	EC_DVD_ERROR	A DVD error condition.
269	EC_DVD_WARNING	A DVD warning condition.
270	EC_DVD_CHAPTER_AUTOSTOP	Playback is stopped as a result of a call to the DVDControl.
271	EC_DVD_NO_FP_PGC	The DVD disc does not have an FP_PGC (First Play Program Chain) and the DVD Navigator will not automatically load any PGC and start playback.
272	EC_DVD_PLAYBACK_RATE_CHANGE	A rate change in the playback has been initiated; the parameter Param1 indicates the new playback rate being used.
273	EC_DVD_PARENTAL_LEVEL_CHANGE	The parental level of the authored content is about to change.
274	EC_DVD_PLAYBACK_STOPPED	Playback has been stopped. See DVDPlaybackStopped enumeration for possible stop reason codes passed in param1 of the MediaEventArgs object.
275	EC_DVD_ANGLES_AVAILABLE	Indicates whether an angle block is being played and angle changes can be performed.
276	EC_DVD_PLAYPERIOD_AUTOSTOP	The Navigator has finished playing the segment specified in a call to DVDControl.
277	EC_DVD_BUTTON_AUTO_ACTIVATED	A menu button has been automatically activated per instructions on the disc.
278	EC_DVD_CMD_START	A command has begun.
279	EC_DVD_CMD_END	A command has completed.
280	EC_DVD_DISC_EJECTED	A disc was ejected.
281	EC_DVD_DISC_INSERTED	A disc was inserted.
282	EC_DVD_CURRENT_HMSF_TIME	The beginning of every video object unit, a video segment that is 0.
283	EC_DVD_KARAOKE_MODE	The Navigator has either begun playing or finished playing karaoke data.
593	EC_WMT_INDEX_EVENT	Indicates that Windows Media indexing event has occurred.
594	EC_WMT_EVENT	Indicates that a Windows Media event has occurred.
768	EC_BUILT	This event is sent when a graph has been built.
769	EC_UNBUILT	This event is sent when a graph has been torn down.

Remarks

For more information, refer to the Microsoft documentation for the Event Notification Codes and DVD Event Notification Codes.

See LoadStatusEventCode enumeration for more information on the EC_LOADSTATUS event code.

Example

using Leadtools; 
using Leadtools.Multimedia; 
using LeadtoolsMultimediaExamples.Fixtures; 
 
 
public bool _result = false; 
public PlayCtrlForm _form = new PlayCtrlForm(); 
 
public void SourceStreamExample() 
{ 
   // reference the play control 
   PlayCtrl playctrl = _form.PlayCtrl; 
 
   // input and output file names 
   string inFile = Path.Combine(LEAD_VARS.MediaDir, "PlayCtrl_Source.avi"); 
 
   try 
   { 
      // turn off auto start 
      playctrl.AutoStart = false; 
 
      // subscribe to the complete event to check our result 
      playctrl.MediaEvent += new MediaEventHandler(PlayCtrl_MediaEvent); 
 
      // set the source stream 
      playctrl.SourceStream = new StreamReader(inFile).BaseStream; 
 
      // set the allowed streams 
      playctrl.AllowedStreams = StreamFormatType.AudioVideoCC; 
 
      // play it! 
      playctrl.Run(); 
   } 
   catch (Exception) 
   { 
      _result = false; 
   } 
 
   // we'll loop on the state and pump messages for this example. 
   // but you should not need to if running from a Windows Forms application. 
   while (playctrl.State == PlayState.Running) 
      Application.DoEvents(); 
} 
 
void PlayCtrl_MediaEvent(object sender, MediaEventArgs e) 
{ 
   // set the result 
   if (e.eventCode == MediaEventCode.EC_COMPLETE) 
      _result = true; 
} 
 
static class LEAD_VARS 
{ 
   public const string MediaDir = @"C:\LEADTOOLS22\Media"; 
}

Requirements

Target Platforms

Reference

Leadtools.Multimedia Namespace

Download our FREE evaluation

Help Version 22.0.2022.12.7

Leadtools.Multimedia Assembly

Introduction

Getting Started

Namespaces

Leadtools.Multimedia Namespace

Leadtools.Multimedia.Common Namespace

Assemblies