Struct BandHash 

struct BandHash {
    module: *mut c_void,
    kernel: *mut c_void,
    sums: CUdeviceptr,
    capacity: usize,
}

A hash per band of rows of a packed 32-bit frame in video memory (band_hash), computed where the frame lies and read back as one word a band and column segment.

Fields

module: *mut c_void

kernel: *mut c_void

sums: CUdeviceptr

capacity: usize

Implementations

impl BandHash

unsafe fn new(cuda: &CudaFunctions) -> Option<Self>

unsafe fn run( &mut self, cuda: &CudaFunctions, src: CUdeviceptr, pitch: usize, width: u32, height: u32, rows: u32, ) -> Option<Vec<u64>>

On the default stream so the hash is ordered behind whatever produced the frame; the copy back waits for it.

unsafe fn launch( &mut self, cuda: &CudaFunctions, src: CUdeviceptr, pitch: usize, width: u32, height: u32, rows: u32, ) -> Option<usize>

The kernel alone, queued on the default stream behind whatever produced the frame: the words read copies back, or None where it did not launch.

unsafe fn read( &mut self, cuda: &CudaFunctions, words: usize, ) -> Option<Vec<u64>>

The hashes a launch of words left, a word a band: the copy back waits for the kernel.

unsafe fn release(self, cuda: &CudaFunctions)