Receives YUV frame SDL playback from a USB camera

SDL Tutorial: http://lazyfoo.net/SDL_tutorials/index.php

Code download: http://download.csdn.net/download/jinchaoqi/6953321

Code:

Main. c

#include <stdio.h><stdlib.h><.h><sys/types.h><sys/stat.h><sys/ioctl.h><sys/time.h><unistd.h><fcntl.h><errno.h><sys/mman.h><linux/videodev2.h><linux/fb.h><pthread.h><libavcodec/avcodec.h><libavformat/avformat.h><libswscale/swscale.h><SDL/SDL.h><SDL/SDL_thread.h> PRINT                 printf("LINE: %d\n",__LINE__) main( argc,  ** n =  *p =* status =*bmp =*screen = SwsContext *sws_ctx =(SDL_Init(SDL_INIT_VIDEO | SDL_INIT_AUDIO |= SDL_SetVideoMode(WIDTH, HEIGHT, , = SDL_SetVideoMode(WIDTH, HEIGHT, ,           (!== (unsigned  *) bmp->pixels[= = ==((i = ; i < ; i++* HEIGHT* &(video_enqueue(i) <  -&(  

 

Gather_picture.h:

 

 GATHER_PICTURE_H VIDEO_DEV    "/dev/video0"     WIDTH            640 HEIGHT           480 frame_buf{           length[ * start[ video_getframe( video_enqueue(

 

Gather_picture.c:

 

#include <stdio.h><stdlib.h><.h><sys/types.h><sys/stat.h><sys/ioctl.h><fcntl.h><errno.h><sys/mman.h><linux/videodev2.h> g_videofd = -;         v4l2_buffer buf;               video_enqueue(=(ioctl(g_videofd, VIDIOC_QBUF, &buf) <  -  v4l2_capability cap ;     v4l2_fmtdesc stfmt;      v4l2_format  fmt;       g_videofd =(g_videofd == - -    (ioctl(g_videofd, VIDIOC_QUERYCAP, &cap) <  - ((cap.capabilities & V4L2_CAP_VIDEO_CAPTURE) == ((cap.capabilities & V4L2_CAP_STREAMING) ==    memset(&stfmt, , = =(ioctl(g_videofd, VIDIOC_ENUM_FMT, &stfmt) != -, stfmt.index++    memset(&fmt,  ,=====&(fmt.fmt.pix.height !=  -  v4l2_requestbuffers reqbuf;         i =     reqbuf.count = ;     reqbuf.type ==(ioctl(g_videofd, VIDIOC_REQBUFS, &reqbuf)==- -     (i = ; i < reqbuf.count; i++=== (ioctl (g_videofd, VIDIOC_QUERYBUF, &buf) == - -== mmap(NULL, buf.length, PROT_READ |(frame_buf.start[i] ==-  v4l2_buf_type type =(ioctl(g_videofd, VIDIOC_STREAMON, &type) <  -  v4l2_buf_type type =(ioctl(g_videofd, VIDIOC_STREAMOFF, &type) <  -  video_getframe(=(ioctl(g_videofd, VIDIOC_DQBUF, &buf) <  -