NV21 to IYUV - 现金网注册平台,现金网博e百,真人百家乐游戏开户

ThexFnv212iyuvfunction converts a NV21 image format to an IYUV image format. The input to the function is the interleaved VU plane only and the outputs are separate U and V planes. There is no need of processing Y plane as both the formats have same the Y plane. U and V values are rearranged from pixel interleaved to plane interleaved.

API Syntax

template void xFnv212iyuv(xF::Mat & src_y, xF::Mat & src_uv,xF::Mat & _y_image, xF::Mat & _u_image,xF::Mat & _v_image)

Parameter Descriptions

The following table describes the template and the function parameters.

Table 1.xFnv212iyuv Function Parameter Descriptions
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 (must be a multiple of 8).
COLS	Maximum width of input and output image (must be a multiple of 8).
NPC	Number of pixels to be processed per cycle; possible options are XF_NPPC1 and XF_NPPC8 for 1 pixel and 8 pixel operations respectively.
NPC_UV	Number of UV image Pixels to be processed per cycle; possible options are XF_NPPC1 and XF_NPPC4 for 1 pixel and 4-pixel operations respectively.
src_y	Input Y plane of size (ROWS, COLS).
src_uv	Input UV plane of size (ROWS/2, COLS/2).
_y_image	Output Y plane of size (ROWS, COLS).
_u_image	Output U plane of size (ROWS/4, COLS).
_v_image	Output V plane of size (ROWS/4, COLS).

Resource Utilization

The following table summarizes the resource utilization of NV21 to IYUV for different configurations, as generated in theVivado HLS 2017.1version tool for theXilinx Xczu9eg-ffvb1156-1-i-es1FPGA, to process a HD (1080x1920) image.

Table 2.xFnv212iyuv Function Resource Utilization Summary
Operating Mode	Operating Frequency (MHz)	Utilization Estimate
Operating Mode	Operating Frequency (MHz)	BRAM_18K	DSP_48Es	FF	LUT	CLB
1pixel	300	0	1	1377	730	219
8pixel	150	0	1	1975	1012	279

Performance Estimate

The following table summarizes the performance of NV21 to IYUV for different configurations, as generated using theVivado HLS 2017.1version tool for theXilinx Xczu9eg-ffvb1156-1-i-es1, to process a grayscale HD (1080x1920) image.

Table 3.xFnv212iyuv Function Performance Estimate Summary
Operating Mode	Latency Estimate
Operating Mode	Max Latency (ms)
1 pixel operation(300Mhz)	6.9
8 pixel operation(150Mhz)	1.7