#include?

/*?Verification?Test?Environment?Include?Files?*/
#include?
#include?
#include?
#include?
#include?
#include?
#include?
#include?
#include?
#include?
#include?
#include?
#include?

#define?TEST_BUFFER_NUM?3

struct?testbuffer
{
????????unsigned?char?*start;
????????size_t?offset;
????????unsigned?int?length;
};

struct?testbuffer?buffers[TEST_BUFFER_NUM];
int?g_in_width?=?176;
int?g_in_height?=?144;
int?g_out_width?=?176;
int?g_out_height?=?144;
int?g_top?=?0;
int?g_left?=?0;
int?g_input?=?0;
int?g_capture_count?=?100;
int?g_rotate?=?0;
int?g_cap_fmt?=?V4L2_PIX_FMT_UYVY;
int?g_camera_framerate?=?30;
int?g_extra_pixel?=?0;
int?g_capture_mode?=?0;
char?g_v4l_device[100]?=?“/dev/video0“;

static?void?print_pixelformat（char?*prefix?int?val）
{
	printf（“%s:?%c%c%c%c\n“?prefix???prefix?:?“pixelformat“
					val?&?0xff
					（val?>>?8）?&?0xff
					（val?>>?16）?&?0xff
					（val?>>?24）?&?0xff）;
}

int?start_capturing（int?fd_v4l）
{
????????unsigned?int?i;
????????struct?v4l2_buffer?buf;
????????enum?v4l2_buf_type?type;

????????for?（i?=?0;?i?????????{
????????????????memset（&buf?0?sizeof?（buf））;
????????????????buf.type?=?V4L2_BUF_TYPE_VIDEO_CAPTURE;
????????????????buf.memory?=?V4L2_MEMORY_MMAP;
		buf.index?=?i;
????????????????if?（ioctl（fd_v4l?VIDIOC_QUERYBUF?&buf）?????????????????{
????????????????????????printf（“VIDIOC_QUERYBUF?error\n“）;
????????????????????????return?-1;
????????????????}

????????????????buffers[i].length?=?buf.length;
????????????????buffers[i].offset?=?（size_t）?buf.m.offset;
????????????????buffers[i].start?=?mmap?（NULL?buffers[i].length
????????????????????PROT_READ?|?PROT_WRITE?MAP_SHARED
????????????????????fd_v4l?buffers[i].offset）;
				memset（buffers[i].start?0xFF?buffers[i].length）;
????????}

????????for?（i?=?0;?i?????????{
????????????????memset（&buf?0?sizeof?（buf））;
????????????????buf.type?=?V4L2_BUF_TYPE_VIDEO_CAPTURE;
????????????????buf.memory?=?V4L2_MEMORY_MMAP;
????????????????buf.index?=?i;
				buf.m.offset?=?buffers[i].offset;
				if?（g_extra_pixel）{
	????????????????buf.m.offset?+=?g_extra_pixel?*
	????????????????	（g_out_width?+?2?*?g_extra_pixel）?+?g_extra_pixel;
				}

????????????????if?（ioctl?（fd_v4l?VIDIOC_QBUF?&buf）?????????????????????????printf（“VIDIOC_QBUF?error\n“）;
????????????????????????return?-1;
????????????????}
????????}

????????type?=?V4L2_BUF_TYPE_VIDEO_CAPTURE;
????????if?（ioctl?（fd_v4l?VIDIOC_STREAMON?&type）?????????????????printf（“VIDIOC_STREAMON?error\n“）;
????????????????return?-1;
????????}
????????return?0;
}

int?stop_capturing（int?fd_v4l）
{
????????enum?v4l2_buf_type?type;

????????type?=?V4L2_BUF_TYPE_VIDEO_CAPTURE;
????????return?ioctl?（fd_v4l?VIDIOC_STREAMOFF?&type）;
}

int?v4l_capture_setup（void）
{
????????struct?v4l2_format?f

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????文件???????50964??2017-06-07?10:58??ov5640_v4l2_0607.c
?????文件????????3592??2017-04-14?10:11??ov5640驅(qū)動tk1移植.txt
?????文件???????11063??2017-06-08?17:35??capture.c