template<int SRC_T,int UV_T,int DST_T,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_OUT = _XFCVDEPTH_DEFAULT>void nv212bgr(xf::cv::Mat<SRC_T, ROWS, COLS, NP, XFCVDEPTH_IN_0C> & src_y, xf::cv::Mat<UV_T, ROWS/2, COLS/2, NPC_UV, XFCVDEPTH_IN_1> & src_uv, xf::cv::Mat<DST_T, ROWS, COLS, NPC, XFCVDEPTH_OUT> & _dst0)
Parameter Descriptions
The following table describes the template and the function parameters.
| Parameter | Description |
|---|---|
| SRC_T | Input pixel type. Only 8-bit,unsigned, 1-channel is supported (XF_8UC1). |
| UV_T | Input 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 a multiple of NPC for N pixel mode. |
| NPC | 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_OUT | Depth of output image |
| src_y | Y input image of size(ROWS, COLS) |
| src_uv | UV output image of size (ROWS/2, COLS/2). |
| _dst0 | Output UV image of size (ROWS, COLS). |
Resource Utilization
The following table summarizes the resource utilization of NV12/NV21
to RGB/ BGR 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 2 5 339 289 76
Performance Estimate
The following table summarizes the performance of the kernel in single pixel configuration as generated using Vivado HLS 2018.3 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 |