template<int SRC_Y, int SRC_UV, int ROWS, int COLS, int NPC=1,int NPC_UV=1, int XFCVDEPTH_IN_0 = _XFCVDEPTH_DEFAULT, int XFCVDEPTH_IN_1 = _XFCVDEPTH_DEFAULT, int XFCVDEPTH_IN_2 = _XFCVDEPTH_DEFAULT, int XFCVDEPTH_IN_3 = _XFCVDEPTH_DEFAULT>void nv212nv12(xf::cv::Mat<SRC_Y, ROWS, COLS, NPC, XFCVDEPTH_IN_0> & _y, xf::cv::Mat<SRC_UV, ROWS/2, COLS/2, NPC_UV, XFCVDEPTH_IN_1> & _uv, xf::cv::Mat<SRC_Y, ROWS, COLS, NPC, XFCVDEPTH_IN_2> & out_y, xf::cv::Mat<SRC_UV, ROWS/2, COLS/2, NPC_UV, XFCVDEPTH_IN_3> & out_uv)
Parameter Descriptions
The following table describes the template and the function parameters.
| Parameter | Description |
|---|---|
| SRC_Y | Input Y pixel type. Only 8-bit, unsigned, 1-channel is supported (XF_8UC1) |
| SRC_UV | Input UV pixel type. Only 8-bit, unsigned, 2-channel is supported (XF_8UC2) |
| ROWS | Maximum height of input and output image |
| COLS | Maximum width of input and output image. Must be multiple of N. |
| NPC_Y | Number of Y pixels to be processed per cycle. Possible options are XF_NPPC1,XF_NPPC2,XF_NPPC4 and XF_NPPC8. |
| NPC_UV | Number of UV Pixels to be processed per cycle. Possible options are XF_NPPC1,XF_NPPC2 and XF_NPPC4. |
| XFCVDEPTH_IN_0 | Depth of input image |
| XFCVDEPTH_IN_1 | Depth of input image |
| XFCVDEPTH_IN_2 | Depth of input image |
| XFCVDEPTH_IN_3 | Depth of input image |
| _y | Y input image |
| _uv | UV input image |
| out_y | Y output image |
| out_uv | UV output image |
Resource Utilization
The following table summarizes the resource utilization of NV122NV21/NV212NV12 function in Normal mode (1-Pixel), as generated in the Vivado HLS 2019.1 tool for the Xilinx xczu9eg-ffvb1156-2-i-es2 FPGA to process a HD (1080x1920) image.
Operating Mode Operating Frequency (MHz) Utilization Estimate BRAM_18K DSP_48Es FF LUT CLB 1 Pixel 300 0 0 258 161 61
Performance Estimate
The following table summarizes the performance of the kernel in single pixel configuration as generated using Vivado HLS 2019.1 tool for the Xilinx xczu9eg-ffvb1156-2-i-es2 FPGA to process a HD (1080x1920) image.
| Operating Mode | Latency Estimate |
|---|---|
| Max Latency (ms) | |
| 1 pixel operation (300 MHz) | 6.9 |