| Microsoft DirectX 8.1 (C++) |
CSourcePosition is an abstract class for implementing the IMediaPosition interface on a source filter.
This class is obsolete. If your source filter is seekable, it should expose the IMediaSeeking interface instead of IMediaPosition. You can use the CSourceSeeking base class for this purpose.
When CSourcePosition::put_CurrentPosition, CSourcePosition::put_StopTime, or CSourcePosition::put_Rate is called, CSourcePosition calls the pure virtual member function CSourcePosition::ChangeStart, CSourcePosition::ChangeStop, or CSourcePosition::ChangeRate, respectively. Override these functions in your derived class.
Protected Data Members
| m_Duration | Duration of the stream. |
| m_pLock | Pointer to a CCritSec object for locking. |
| m_Rate | Sample rate. |
| m_Start | Start time. |
| m_Stop | Stop time. |
Member Functions
| CSourcePosition | Constructs a CSourcePosition object. |
Overridable Member Functions
| ChangeRate | Override this pure virtual to handle notification that the rate property has changed. |
| ChangeStart | Override this pure virtual to handle notification that the start position property has changed. |
| ChangeStop | Override this pure virtual to handle notification that the stop position property has changed. |
Implemented IMediaPosition Methods
| get_CurrentPosition | Not currently implemented. |
| get_Duration | Retrieves the total duration of the media. |
| get_PrerollTime | Not currently implemented. |
| get_Rate | Retrieves the playback rate, relative to normal playback of the media. |
| get_StopTime | Retrieves the position within the media at which playback should stop. |
| put_CurrentPosition | Sets the position within the media at which playback should start. |
| put_PrerollTime | Not currently implemented. |
| put_Rate | Sets the playback rate, relative to normal playback of the media. |
| put_StopTime | Sets the position within the media at which playback should stop. |