Linux下使用libyuv提高YUV图像转换效率

一、环境介绍

操作系统: ubuntu18.04

开发平台: RK3399

二、出现的问题

使用FFMPEG的sws_scale函数在ARM平台转换效率很低，使用libyuv提高转换效率。

三、下载编译libyuv

CSDN下载地址：https://download.csdn.net/download/xiaolong1126626497/12631325

GitHub下载地址: https://github.com/lemenkov/libyuv

wbyq@wbyq:~/qt_code/666$ unzip /mnt/hgfs/linux-share-dir/libyuv-master.zip 
wbyq@wbyq:~/qt_code/666$ cd libyuv-master
wbyq@wbyq:~/qt_code/666$ make -f linux.mk

 

四、示例代码

调用libyuv库方式：  将libyuv.h包含到工程，直接调用转换函数即可（转换函数名称可看下面2个例子），编译时指定libyuv.a库。

 

//YUYV422转YUV420P

//YUYV422转YUV420P
uint8_t* i420_image = video0_yuv420p_buff;
uint8_t* i420_image_y_ptr = i420_image;
uint8_t* i420_image_u_ptr = i420_image_y_ptr + (VIDEO_WIDTH * VIDEO_HEIGHT);
uint8_t* i420_image_v_ptr = i420_image_u_ptr + (int)(VIDEO_WIDTH * VIDEO_HEIGHT * 0.25);

libyuv::YUY2ToI420(
		image_buffer[video_buffer.index],VIDEO_WIDTH*2,
		(uint8_t*)i420_image_y_ptr, VIDEO_WIDTH,
		(uint8_t*)i420_image_u_ptr, (VIDEO_WIDTH >> 1),
		(uint8_t*)i420_image_v_ptr, (VIDEO_WIDTH >> 1),
		VIDEO_WIDTH, VIDEO_HEIGHT);

 

YUYV422转ARGB

libyuv::YUY2ToARGB(image_buffer[video_buffer.index],VIDEO_WIDTH*2,
                          argb_buffer,VIDEO_WIDTH*4,VIDEO_WIDTH,VIDEO_HEIGHT);