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IAMVideoAccelerator::QueryRenderStatus

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Microsoft DirectShow 9.0

IAMVideoAccelerator::QueryRenderStatus

The QueryRenderStatus method queries the processing status of a data buffer.

Syntax

  HRESULT QueryRenderStatus(
  DWORD dwTypeIndex,
  DWORD dwBufferIndex,
  DWORD dwFlags
);

Parameters

dwTypeIndex

[in] Type index for buffer to be tested.

dwBufferIndex

[in] Buffer index for buffer to be tested.

dwFlags

[in] Flag indicating the type of query to perform. If zero, this method tests whether the surface is safe to use for updates. If AMVA_QUERYRENDERSTATUSF_READ, this method tests whether the surface is safe to use for reading.

Return Values

Returns an HRESULT value. Returns S_OK if the operation is complete; returns E_PENDING if the operation is still in progress. If the operation failed, this method returns another failure code, which can include one of the following standard constants, or other values not listed.

Return code Description
E_FAIL Failure.
E_INVALIDARG Argument is invalid.
E_NOTIMPL Method is not supported.
E_POINTER Null pointer argument.
S_OK Success.

Remarks

Calling this method will report progress and failures.

Requirements

Header: Include videoacc.h.

Library: Use Strmiids.lib.

See Also