IAMDecoderCaps::GetDecoderCaps
| Microsoft DirectShow 9.0 |
IAMDecoderCaps::GetDecoderCaps
The GetDecoderCaps method queries the decoder for its capabilities.
Syntax
HRESULT GetDecoderCaps( DWORD dwCapIndex, DWORD* lpdwCap );
Parameters
dwCapIndex
[in] Specifies the capability being queried for.
| Constant | Value | Description |
| AM_QUERY_DECODER_VMR_SUPPORT | 0x00000001 | Video Mixing Renderer Filter 7 (VMR-7) support |
| AM_QUERY_DECODER_DXVA_1_SUPPORT | 0x00000002 | DirectX Video Acceleration support |
| AM_QUERY_DECODER_DVD_SUPPORT | 0x00000003 | DVD Video support |
| AM_QUERY_DECODER_ATSC_SD_SUPPORT | 0x00000004 | Standard-definition (SD) ATSC video support |
| AM_QUERY_DECODER_ATSC_HD_SUPPORT | 0x00000005 | High-definition (HD) ATSC video support |
| AM_GETDECODERCAP_QUERY_VMR9_SUPPORT | 0x00000006 | Video Mixing Renderer Filter 9 (VMR-9) support |
| AM_GETDECODERCAP_QUERY_EVR_SUPPORT | 0x00000007 | Enhanced Video Renderer (EVR) support. |
lpdwCap
[out] Receives one of the following values.
| Value | Description |
| DECODER_CAP_NOTSUPPORTED | The decoder does not support this capability. |
| DECODER_CAP_SUPPORTED | The decoder supports this capability. |
Return Values
If the method succeeds, it returns S_OK. Otherwise it returns an HRESULT error code.
Remarks
The DVD Graph Builder uses this method when it builds a DVD graph. If the decoder does not support the Video Mixing Renderer filter, then the DVD Graph Builder uses the Overlay Mixer filter instead.
Requirements
Header: Declared in Strmif.h; include Dshow.h.
Library: Use Strmiids.lib.
See Also