StreamClassGetDmaBuffer - NtDoc
Native API online documentation, based on the System Informer
(formerly Process Hacker) phnt
headers
// strmini.h
PVOID STREAMAPI StreamClassGetDmaBuffer(
[in] PVOID HwDeviceExtension
);
View the official Windows Driver Kit DDI referenceNo description available.
The StreamClassGetDmaBuffer routine returns a pointer to the DMA buffer that the class driver allocates for the minidriver.
HwDeviceExtension [in]Pointer to the minidriver's device extension. The minidriver specifies the size of this buffer in the HW_INITIALIZATION_DATA structure it passes when it registers itself via StreamClassRegisterMinidriver. The class driver then passes pointers to the buffer in the HwDeviceExtension member of the HW_STREAM_REQUEST_BLOCK, HW_STREAM_OBJECT, HW_TIME_CONTEXT, and PORT_CONFIGURATION_INFORMATION structures it passes to the minidriver.
StreamClassGetDmaBuffer returns a pointer to the DMA buffer.
The minidriver specifies the size of the DMA buffer in the DmaBufferSize member of its HW_INITIALIZATION_DATA structure.