SOUND_DOUBLE_BUFFER

typedef struct {

enum {LowerHalf = 0,

UpperHalf}

NextHalf;

ULONG BufferSize;

PUCHAR Buf;

ULONG StartOfData;

ULONG nBytes;

UCHAR Pad;

} SOUND_DOUBLE_BUFFER, *PSOUND_DOUBLE_BUFFER;

The SOUND_DOUBLE_BUFFER structure is an internal structure that describes the usage of a DMA buffer of type SOUND_DMA_BUFFER.

Members

NextHalf

Indicates which half of the buffer is to be used next.

BufferSize

Actual amount of DMA buffer in use. Obtained by calling SoundGetDMABufferSize.

Buf

Pointer to a buffer specified by a SOUND_DMA_BUFFER structure.

StartOfData

Start of valid data.

nBytes

Number of bytes in buffer.

Pad

Value to use when padding the buffer.