IWMImageInfo::GetImage 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 It has been superseded by Source Reader and Sink Writer.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 GetImage method retrieves an image stored in a file as an ID3v2 "APIC" metadata frame.
Syntax
HRESULT GetImage(
[in] DWORD wIndex,
[in, out] WORD *pcchMIMEType,
[out] WCHAR *pwszMIMEType,
[in, out] WORD *pcchDescription,
[out] WCHAR *pwszDescription,
[out] WORD *pImageType,
[in, out] DWORD *pcbImageData,
[out] BYTE *pbImageData
);
Parameters
[in] wIndex
WORD containing the image index. This is a number between zero, and one less than the image count retrieved by IWMImageInfo::GetImageCount.
[in, out] pcchMIMEType
Pointer to a WORD containing the length, in wide characters, of pwszMIMEType, including the terminating NULL character. On the first call to this method, pass NULL as pwszMIMEType to retrieve the required number of characters.
[out] pwszMIMEType
Pointer to a wide-character null-terminated string containing the MIME Type associated with the image. Set to NULL on the first call and pcchMIMEType will be set to the number of wide characters, including the terminating NULL, in this string.
[in, out] pcchDescription
Pointer to a WORD containing the length, in wide characters, of pwszDescription, including the terminating NULL character. On the first call to this method, pass NULL as pwszDescription to retrieve the required number of characters.
[out] pwszDescription
Pointer to a wide-character null-terminated string containing the image description. Set to NULL on the first call and pcchDescription will be set to the number of wide characters, including the terminating NULL, in this string.
[out] pImageType
Pointer to a WORD value containing the image type, as defined by the ID3v2 specification. This will be one of the following values.
| Value | Description |
|---|---|
| 0 | Picture of a type not specifically listed in this table |
| 1 | 32-pixel-by-32-pixel file icon. Use only with portable network graphics (PNG) format. |
| 2 | File icon not conforming to type 1 above. |
| 3 | Front album cover. |
| 4 | Back album cover. |
| 5 | Leaflet page. |
| 6 | Media. Typically this type of image is of the label side of a CD. |
| 7 | Picture of the lead artist, lead performer, or soloist. |
| 8 | Picture of one of the involved artists or performers. |
| 9 | Picture of the conductor. |
| 10 | Picture of the band or orchestra. |
| 11 | Picture of the composer. |
| 12 | Picture of the lyricist or writer. |
| 13 | Picture of the recording studio or location. |
| 14 | Picture taken during a recording session. |
| 15 | Picture taken during a performance. |
| 16 | Screen capture from a movie or video. |
| 17 | A bright colored fish. |
| 18 | Illustration. |
| 19 | Logo of the band or artist. |
| 20 | Logo of the publisher or studio. |
[in, out] pcbImageData
Pointer to a DWORD containing the length, in bytes, of the image pointed to by pbImageData. On the first call to this method, pass NULL as pbImageData to retrieve the required number of bytes.
[out] pbImageData
Pointer to a BYTE buffer containing the image data. Set to NULL on the first call and pcbImageData will be set to the number of bytes in the buffer.
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. |
|
One or more of the following parameters is NULL.
pcchMIMEType
pcbImageData |
|
One of the ID3 frames that should be in the file cannot be accessed. |
|
The value referenced by one of the following parameters is less than the required buffer size for the corresponding output parameter.
pcchMIMEType pcchDescription pcbImageData |
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) |