|
NVIDIA Performance Primitives (NPP)
Version 10.0
|
JPEG frame descriptor. More...
#include <nppi_compression_functions.h>
Data Fields | |
| Npp8u | nComponents |
| Number of components in frame. More... | |
| NppiSize | oSizeInBlocks |
| Size of component with 1x1 subsampling (usually luma) in DCT blocks. More... | |
| NppiSize | aComponentSubsampling [4] |
| Subsampling factors of component, as described in frame header. More... | |
| Npp16s * | apComponentBuffer [4] |
| Buffer containing DCT coefficients. More... | |
JPEG frame descriptor.
Can hold from 1 to 4 components.
| NppiSize NppiJpegFrameDescr::aComponentSubsampling[4] |
Subsampling factors of component, as described in frame header.
| Npp16s* NppiJpegFrameDescr::apComponentBuffer[4] |
Buffer containing DCT coefficients.
Use nppiJpegDecodeGetDCTBufferSize to determine size of this buffer. After decoding, coefficients will be stored in zig-zag order, block by block. So the c-th coeffient of block (x, y) will be stored at buffer[64 * (y * interleavedComponentWidthInBlocks + x) + c].
| Npp8u NppiJpegFrameDescr::nComponents |
Number of components in frame.
| NppiSize NppiJpegFrameDescr::oSizeInBlocks |
Size of component with 1x1 subsampling (usually luma) in DCT blocks.