opencv 人脸检测ARM板

#include <stdio.h> #include <stdlib.h> #include <string.h> #include <assert.h> #include <getopt.h> //解析命令行选项参数头文件 #include <fcntl.h> #include <unistd.h> #include <errno.h> #include <sys/stat.h> #include <sys/types.h> #include <sys/time.h> #include <sys/mman.h> #include <sys/ioctl.h> #include <asm/types.h> #include <linux/videodev2.h> #include <linux/fb.h> #define CLEAR(x) memset (&(x), 0, sizeof (x)) struct buffer { void * start; size_t length; }; static char * dev_name = NULL; static int fd = -1; struct buffer * buffers = NULL; static unsigned int n_buffers = 0; static int time_in_sec_capture=50; //每秒摄像头捕获的帧数 static int fbfd = -1; static struct fb_var_screeninfo vinfo; static struct fb_fix_screeninfo finfo; static char *fbp=NULL; static long screensize=0; static void errno_exit (const char * s) { fprintf (stderr, "%s error %d, %s\n",s, errno, strerror (errno)); exit (EXIT_FAILURE); } static int xioctl (int fd,int request,void * arg) { int r; do r = ioctl (fd, request, arg); while (-1 == r && EINTR == errno); return r; } inline int clip(int value, int min, int max) { return (value > max ? max : value < min ? min : value); } static void process_image (const void * p){ //ConvertYUVToRGB32 unsigned char* in=(char*)p; int width=320; int height=240; int istride=width*2; int x,y,j; int y0,u,y1,v,r,g,b; long location=0; for ( y = 10; y < height + 10; ++y) { for (j = 0, x=10; j < width * 2 ; j += 4,x +=2) { location = (x+vinfo.xoffset) * (vinfo.bits_per_pixel/8) + (y+vinfo.yoffset) * finfo.line_length; y0 = in[j]; u = in[j + 1] - 128; y1 = in[j + 2]; v = in[j + 3] - 128; r = (298 * y0 + 409 * v + 128) >> 8; g = (298 * y0 - 100 * u - 208 * v + 128) >> 8; b = (298 * y0 + 516 * u + 128) >> 8; fbp[ location + 0] = ((clip(g, 0, 255)&0x1c)<< 3 ) | ( clip(b, 0, 255) >> 3 ); fbp[ location + 1] = ((clip(r, 0, 255) & 0xf8) ) | ( clip(g, 0, 255)>> 5); r = (298 * y1 + 409 * v + 128) >> 8; g = (298 * y1 - 100 * u - 208 * v + 128) >> 8; b = (298 * y1 + 516 * u + 128) >> 8; fbp[ location + 2] = ((clip(g, 0, 255)&0x1c)<< 3 ) | ( clip(b, 0, 255) >> 3 ); fbp[ location + 3] = ((clip(r, 0, 255) & 0xf8) ) | ( clip(g, 0, 255)>> 5); } in +=istride; } } static void process_image_bak (const void * p){ //ConvertYUVToRGB32 1; unsigned char* in=(char*)p; int width=320; int height=240; int istride=640; int x,y,j; int y0,u,y1,v,r,g,b; long location=0; for ( y = 100; y < height + 100; ++y) { for (j = 0, x=100; j < width * 2 ; j += 4,x +=2) { location = (x+vinfo.xoffset) * (vinfo.bits_per_pixel/8) + (y+vinfo.yoffset) * finfo.line_length; y0 = in[j]; u = in[j + 1] - 128; y1 = in[j + 2]; v = in[j + 3] - 128; r = (298 * y0 + 409 * v + 128) >> 8; g = (298 * y0 - 100 * u - 208 * v + 128) >> 8; b = (298 * y0 + 516 * u + 128) >> 8; fbp[ location + 0] = clip(b, 0, 255); fbp[ location + 1] = clip(g, 0, 255); fbp[ location + 2] = clip(r, 0, 255); fbp[ location + 3] = 255; r = (298 * y1 + 409 * v + 128) >> 8; g = (298 * y1 - 100 * u - 208 * v + 128) >> 8; b = (298 * y1 + 516 * u + 128) >> 8; fbp[ location + 4] = clip(b, 0, 255); fbp[ location + 5] = clip(g, 0, 255); fbp[ location + 6] = clip(r, 0, 255); fbp[ location + 7] = 255; } in +=istride; } } static int read_frame (void) { struct v4l2_buffer buf; unsigned int i; CLEAR (buf); buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; buf.memory = V4L2_MEMORY_MMAP; if (-1 == xioctl (fd, VIDIOC_DQBUF, &buf)) { switch (errno) { case EAGAIN: return 0; case EIO: default: errno_exit ("VIDIOC_DQBUF"); } } assert (buf.index < n_buffers); // printf("v4l2_pix_format->field(%d)\n", buf.field); //assert (buf.field ==V4L2_FIELD_NONE); process_image (buffers[buf.index].start); if (-1 == xioctl (fd, VIDIOC_QBUF, &buf)) errno_exit ("VIDIOC_QBUF"); return 1; } static void run (void) { unsigned int count; int frames; frames = 30 * time_in_sec_capture; // while (frames-- > 0) { while (1) { for (;;) { fd_set fds; struct timeval tv; int r; FD_ZERO (&fds); FD_SET (fd, &fds); tv.tv_sec = 2; tv.tv_usec = 0; r = select (fd + 1, &fds, NULL, NULL, &tv); if (-1 == r) { if (EINTR == errno) continue; errno_exit ("select"); } if (0 == r) { fprintf (stderr, "select timeout\n"); exit (EXIT_FAILURE); } if (read_frame ()) break; } } } static void stop_capturing (void) { enum v4l2_buf_type type; type = V4L2_BUF_TYPE_VIDEO_CAPTURE; if (-1 == xioctl (fd, VIDIOC_STREAMOFF, &type)) errno_exit ("VIDIOC_STREAMOFF"); } static void start_capturing (void) { unsigned int i; enum v4l2_buf_type type; for (i = 0; i < n_buffers; ++i) { struct v4l2_buffer buf; CLEAR (buf); buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; buf.memory = V4L2_MEMORY_MMAP; buf.index = i; if (-1 == xioctl (fd, VIDIOC_QBUF, &buf)) errno_exit ("VIDIOC_QBUF"); } type = V4L2_BUF_TYPE_VIDEO_CAPTURE; if (-1 == xioctl (fd, VIDIOC_STREAMON, &type)) errno_exit ("VIDIOC_STREAMON"); } static void uninit_device (void) { unsigned int i; for (i = 0; i < n_buffers; ++i) if (-1 == munmap (buffers[i].start, buffers[i].length)) errno_exit ("munmap"); if (-1 == munmap(fbp, screensize)) { printf(" Error: framebuffer device munmap() failed.\n"); exit (EXIT_FAILURE) ; } free (buffers); } static void init_mmap (void) { struct v4l2_requestbuffers req; //mmap framebuffer fbp = (char *)mmap(NULL,screensize,PROT_READ | PROT_WRITE,MAP_SHARED ,fbfd, 0); if ((int)fbp == -1) { printf("Error: failed to map framebuffer device to memory.\n"); exit (EXIT_FAILURE) ; } memset(fbp, 0, screensize); CLEAR (req); req.count = 4; req.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; req.memory = V4L2_MEMORY_MMAP; if (-1 == xioctl (fd, VIDIOC_REQBUFS, &req)) { if (EINVAL == errno) { fprintf (stderr, "%s does not support memory mapping\n", dev_name); exit (EXIT_