| Microsoft DirectX 8.1 (C++) |
The DMUS_BUFFERDESC structure is used to describe a buffer for the IDirectMusic8::CreateMusicBuffer method.
Syntax
typedef struct _DMUS_BUFFERDESC {
DWORD dwSize;
DWORD dwFlags;
GUID guidBufferFormat;
DWORD cbBuffer;
} DMUS_BUFFERDESC, *LPDMUS_BUFFERDESC;
Members
dwSize
Size of this structure, in bytes. This member must be initialized before the structure is used.
dwFlags
No flags are defined.
guidBufferFormat
Identifier of the KS format of the buffer. The value GUID_NULL represents KSDATAFORMAT_SUBTYPE_DIRECTMUSIC.
If guidBufferFormat represents a KS format other than KSDATAFORMAT_SUBTYPE_DIRECTMUSIC, the application must verify that the port playing back the data understands the specified format; if not, the buffer is ignored. To find out whether the port supports a specific KS format, use the IKsControl::KsProperty method.
cbBuffer
Minimum size of the buffer, in bytes. The amount of memory allocated can be slightly higher because the system pads the buffer to a multiple of 4 bytes. The buffer must be at least 32 bytes to accommodate a single MIDI channel message, and at least 28 bytes plus the size of the data to accommodate a system exclusive message or other unstructured data.
Requirements
Header: Declared in dmusici.h.
See Also