Android S5PV210 camera驱动测试程序

分类： Android Samsung S5PV210 2012-07-04 13:47  480人阅读  评论(13)  收藏  举报

最近在调试S5PV210上的camera驱动，因为对Android的samsung camera hal 不太了解，自己写了个测试程序方便调试

因为camera驱动都是遵守V4L2标准，所以测试程序是通用的，在MX51平台也能工作。

 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <assert.h>
 #include <getopt.h>
 #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))

 int PAL_WIDTH = 720;
 int PAL_HEIGHT = 576;

 enum {
     RGB565,
     RGB888,
     RGB32,
 };

 struct buffer {
     void *start;
     size_t length;
 };

 static char *dev_name = NULL;
 static int fd = -1;
 static unsigned int n_buffers = 0;
 static int g_width;
 static int g_height;
 static unsigned  g_pixelformat;
 static struct fb_var_screeninfo vinfo;
 static struct fb_fix_screeninfo finfo;
 struct buffer *buffers = NULL;
 static int file_index = 1;
 static int g_count = 9;


 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;
 }

 static void write_yuv(const void *p, int index)
 {
     int write_fd = 0;
     int ret;
     int length;
     char tmp[20];

     sprintf(tmp, "/data/file/yuvfile%d", index);

     write_fd = open(tmp, O_RDWR|O_CREAT);
     if (write_fd == -1) {
         printf("%s: open yuvfile failed, errno(%d)\n", __func__, errno);
     }

     length = g_width * g_height * 2;
     ret = write(write_fd, p, length);
     if (ret != length) {
         printf("%s: write yuvfile failed, ret(%d), errno(%d)\n", __func__, ret, errno);
     }
 }

 static void process_image(const void *p)
 {
     if (file_index < g_count) {
         write_yuv(p, file_index);
         file_index = file_index + 1;
     }
 }

 static int read_frame(void)
 {
     int ret = 0;
     struct timeval timer;
     struct v4l2_buffer buf;

     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:
             printf("VIDIOC_DQBUF return EAGAIN\n");
             return 0;
         default:
             printf("VIDIOC_DQBUF failed, errno(%d):\n", errno, strerror(errno));
             ret = -errno;
             return ret;
         }
     }

     assert (buf.index < n_buffers);
     printf("%s: buf.bytesused(%d), buf.index(%d)\n",
             __func__, buf.index);
     process_image(buffers[buf.index].start);
     if (-1 == xioctl(fd, VIDIOC_QBUF, &buf)) {
         printf("VIDIOC_BUF failed, errno(%d)\n", errno);
         ret = -errno;
     }

     gettimeofday(&timer, NULL);
     printf("(%d)th capture, tv_sec(%d), tv_usec\n",
             file_index, timer.tv_sec, timer.tv_usec);

     return ret;
 }

 static void run(void)
 {
     int ret;

     printf("%s: enter\n", __func__);

     while (1) {
         fd_set fds;
         struct timeval tv;
         FD_ZERO (&fds);
         FD_SET(fd, &fds);

         if (file_index == g_count) {
             break;
         }

         tv.tv_sec = 5;
         tv.tv_usec = 0;

         ret = select(fd + 1, &fds, NULL, NULL, &tv);
         if (-1 == ret) {
             if (EINTR == errno) {
                 printf("errno == EINTR\n");
                 continue;
             }
             errno_exit("select");
         }

         if (0 == ret) {
             printf("select timeout\n");
             exit(EXIT_FAILURE);
         }

         if (read_frame())
             continue;
         sleep(1);
     }

     printf("%s: end run\n", __func__);
 }

 static void stop_capturing (void)
 {
     enum v4l2_buf_type type;

     printf("%s: enter\n", __func__);

     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;

     printf("%s: enter\n", __func__);

     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");

     free (buffers);
 }


 static void init_mmap (void)
 {
     struct v4l2_requestbuffers req;

     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_FAILURE);
         } else {
             errno_exit ("VIDIOC_REQBUFS");
         }
     }

     if (req.count < 2) {    //if (req.count < 2)
         fprintf (stderr, "Insufficient buffer memory on %s\n",dev_name);
         exit (EXIT_FAILURE);
     }

     buffers = calloc(req.count, sizeof(*buffers));
     if (!buffers) {
         fprintf (stderr, "Out of memory\n");
         exit (EXIT_FAILURE);
     }
     printf("request buffer count(%d)\n", req.count);

     for (n_buffers = 0; n_buffers < req.count; ++n_buffers) {
         struct v4l2_buffer buf;

         CLEAR (buf);

         buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
         buf.memory = V4L2_MEMORY_MMAP;
         buf.index = n_buffers;

         if (-1 == xioctl (fd, VIDIOC_QUERYBUF, &buf))
             errno_exit ("VIDIOC_QUERYBUF");

         buffers[n_buffers].length = buf.length;
         buffers[n_buffers].start = mmap(NULL, buf.length, PROT_READ|PROT_WRITE, MAP_SHARED, fd, buf.m.offset);
         printf("buf.start(%p), buf.length(%d)\n", buffers[n_buffers].start, buf.length);
         if (MAP_FAILED == buffers[n_buffers].start)
             errno_exit ("mmap");
     }

 }

 static void init_device (void)
 {
     struct v4l2_capability cap;
     struct v4l2_cropcap cropcap;
     struct v4l2_crop crop;
     struct v4l2_format fmt;

     if (-1 == xioctl(fd, VIDIOC_QUERYCAP, &cap)) {
         printf("%s: VIDIOC_QUERYCAP\n", __func__, errno);
         exit (EXIT_FAILURE);
     }

     printf("support overlay cap.capabilities(0x%x)\n", cap.capabilities);
     if (!(cap.capabilities & V4L2_CAP_VIDEO_CAPTURE)) {
         fprintf (stderr, "%s is no video capture device\n",dev_name);
         exit (EXIT_FAILURE);
     }

     if (!(cap.capabilities & V4L2_CAP_STREAMING)) {
         fprintf (stderr, "%s does not support streaming i/o\n",dev_name);
         exit (EXIT_FAILURE);
     }

     CLEAR (cropcap);
     cropcap.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
     if (0 == xioctl (fd, VIDIOC_CROPCAP, &cropcap)) {
         crop.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
         crop.c = cropcap.defrect;

         if (-1 == xioctl(fd, VIDIOC_S_CROP, &crop)) {
             printf("VIDIOC_S_CROP failed(%d), %s\n", errno, strerror(errno));
         }
     }

     CLEAR (fmt);
     fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
     fmt.fmt.pix.width = PAL_WIDTH;
     fmt.fmt.pix.height = PAL_HEIGHT;
     fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
     fmt.fmt.pix.field = V4L2_FIELD_NONE;
     if (-1 == xioctl (fd, VIDIOC_S_FMT, &fmt)) {
         errno_exit ("VIDIOC_S_FMT");
     }

     printf("width(%d), height(%d), pixelformat(0x%x), field(%d)\n",
             fmt.fmt.pix.width, fmt.fmt.pix.height, fmt.fmt.pix.pixelformat,
             fmt.fmt.pix.field);

     g_width = fmt.fmt.pix.width;
     g_height = fmt.fmt.pix.height;

     init_mmap ();
 }

 static void close_device(void)
 {
     close(fd);
 }

 static void open_device(void)
 {
     struct stat st;


     fd = open(dev_name, O_RDWR| O_NONBLOCK, 0);
     if (-1 == fd) {
         fprintf (stderr, "Cannot open '%s': %d, %s\n",
                 dev_name, errno, strerror (errno));
         exit (EXIT_FAILURE);
     }
 }

 static void usage (FILE * fp,int argc,char ** argv)
 {
     fprintf (fp,
             "Usage: %s [options]\n\n"
             "Options:\n"
             "-d | --device name Video device name [/dev/video]\n"
             "-h | --help Print this message\n"
             "-t | --how long will display in seconds\n"
             "",
             argv[0]);
 }

 static const char short_options [] = "d:w:h:f:p:c:";
 static const struct option long_options [] = {
     { "device", required_argument, NULL, 'd' },
     { "help", no_argument, NULL, 'h' },
     { "time", no_argument, NULL, 't' },
     { 0, 0, 0, 0 }
 };

 int select_input(int input)
 {
     int ret;
     ret = xioctl(fd, VIDIOC_S_INPUT, &input);
     if (ret) {
         printf("xioctl VIDIOC_S_INPUT failed errno(%d)\n", errno);
     }

     return ret;
 }


 int main (int argc,char ** argv)
 {
     dev_name = "/dev/video0";

     for (;;) {
         int index;
         int c;
         int tmp;

         c = getopt_long(argc, argv, short_options, long_options, &index);
         if (-1 == c)
             break;

         switch (c) {
             case 0:
                 break;
             case 'd':
                 dev_name = optarg;
                 break;
             case 'c':
                 g_count = strtol(optarg, NULL, 10);
                 break;
             case 'p':
                 tmp = strtol(optarg, NULL, 10);
                 if (tmp == 0) {
                     g_pixelformat = V4L2_PIX_FMT_UYVY;
                 }
                 else if (tmp == 1) {
                     g_pixelformat = V4L2_PIX_FMT_YUYV;
                 }
                 break;
             case 'w':
                 PAL_WIDTH = strtol(optarg, NULL, 10);
                 printf("PAL_WIDTH(%d)\n", PAL_WIDTH);
                 break;
             case 'h':
                 PAL_HEIGHT = strtol(optarg, NULL, 10);
                 printf("PAL_HEIGHT(%d)\n", PAL_HEIGHT);
                 break;
             default:
                 usage (stderr, argc, argv);
                 exit (EXIT_FAILURE);
         }
     }

     open_device();
     select_input(0);
     init_device();
     start_capturing ();
     run();
     stop_capturing();
     uninit_device();
     close_device();

     return 0;
 }