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.