IAsyncReader2::SetCurrentPosition (Compact 7)
3/12/2014
This method sets the position of the first requested sample in the media stream.
Syntax
HRESULT SetCurrentPosition(
LONGLONG lOffset
);
Parameters
- lOffset
[in] Offset, in bytes, of the first requested media sample.
Return Value
Returns the HRESULT values shown in the following table.
| Value | Description |
|---|---|
E_FAIL |
The position was not set. |
VFW_E_BADALIGN |
An invalid alignment was specified. |
S_OK |
The position was set. |
Remarks
You must set the offset of the requested media sample based on the properties of the streamer i.e. the streamer supports time based seeking allocator. To retrieve the source properties, call IAsyncReader2::GetCapabilities. If the allocator is based on time streamer supports time-based seeking, set the offset from the start time of the stream and set the time in the IAsyncReader2::SetCurrentTime method. If the allocator is based on position streamer supports byte-based seeking, set the offset in bytes from the start of the stream.
You can retrieve the sample from this position by calling IAsyncReader2::GetNext.
Requirements
Header |
dshow.h |
Library |
Strmiids.lib |