Windows Media Event Notification Codes
Windows Media technology introduces a number of additional event notification codes to the underlying DirectShow API. A DirectShow application that uses Windows Media filters can use these event notification codes to receive valuable information about the activities taking place within the filter graph.
The Windows Media event notification codes fit directly into the DirectShow API framework and are used in exactly the same way as the standard DirectShow event notification codes. For specific programming details for working with event notification codes in your application, see Event Notification Codes in the DirectShow documentation.
| Event notification code | Description |
|---|---|
| EC_PLEASE_REOPEN | The graph should be re-rendered. |
| EC_STATUS | Two arbitrary strings: a short one and a long one. |
| EC_MARKER_HIT | A marker has just been passed. |
| EC_LOADSTATUS | Sent when various points are reached while a network file is being loaded. |
| EC_FILE_CLOSED | The file has been involuntarily closed. |
| EC_ERRORABORTEX | The operation aborted because of error. |
| EC_EOS_SOON | The source filter is about to deliver an EOS downstream. |
| EC_CONTENTPROPERTY_CHANGED | A streaming media filter received a change in the stream's description information. |
| EC_BANDWIDTHCHANGE | The bandwidth of the streaming data has changed. |
| EC_VIDEOFRAMEREADY | The first video frame is about to be drawn. |
| EC_DRMSTATUS | Sent when various points during the DRM process are reached. |
Last updated on Wednesday, April 13, 2005
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