IWMCodecInfo::GetCodecInfoCount method (wmsdkidl.h)
[The feature associated with this page, Windows Media Format 11 SDK, is a legacy feature. It has been superseded by Source Reader and Sink Writer. Source Reader and Sink Writer have been optimized for Windows 10 and Windows 11. Microsoft strongly recommends that new code use Source Reader and Sink Writer instead of Windows Media Format 11 SDK, when possible. Microsoft suggests that existing code that uses the legacy APIs be rewritten to use the new APIs if possible.]
The GetCodecInfoCount method retrieves the number of supported codecs for a specified major type of digital media (audio or video).
Syntax
HRESULT GetCodecInfoCount(
[in] REFGUID guidType,
[out] DWORD *pcCodecs
);
Parameters
[in] guidType
GUID identifying the major type of digital media. This must be one of the following constants.
| Constant | Description |
|---|---|
| WMMEDIATYPE_Video | Specifies a video codec. |
| WMMEDIATYPE_Audio | Specifies an audio codec. |
[out] pcCodecs
Pointer to a count of supported codecs.
Return value
The method returns an HRESULT. Possible values include, but are not limited to, those in the following table.
| Return code | Description |
|---|---|
|
The method succeeded. |
|
pcCodecs has been passed a null value. |
|
guidType is not a type for which codecs are used. |
Remarks
Use this method along with GetCodecFormatCount and GetCodecFormat to enumerate through the supported codecs for each media type, and the supported formats for each codec.
The Windows Media Format SDK provides codecs only for audio and video. If you specify another major type, this method will return an error.
Requirements
| Minimum supported client | Windows 2000 Professional [desktop apps only],Windows Media Format 7 SDK, or later versions of the SDK |
| Minimum supported server | Windows 2000 Server [desktop apps only] |
| Target Platform | Windows |
| Header | wmsdkidl.h (include Wmsdk.h) |
| Library | Wmvcore.lib; WMStubDRM.lib (if you use DRM) |