structv4l2_format{__u32type;union{structv4l2_pix_formatpix;/* V4L2_BUF_TYPE_VIDEO_CAPTURE */structv4l2_pix_format_mplanepix_mp;/* V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE */structv4l2_windowwin;/* V4L2_BUF_TYPE_VIDEO_OVERLAY */structv4l2_vbi_formatvbi;/* V4L2_BUF_TYPE_VBI_CAPTURE */structv4...
V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE : 多个内存块存储一帧数据 #include <stdio.h> #include <stdlib.h> #include <stdint.h> #include <fcntl.h> #include <unistd.h> #include <string.h> #include <sys/ioctl.h> #include <errno.h> #include <linux/videodev...
__u32 type;//表示捕获设备union {structv4l2_pix_format pix;/*V4L2_BUF_TYPE_VIDEO_CAPTURE*/structv4l2_pix_format_mplane pix_mp;/*V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE*/structv4l2_window win;/*V4L2_BUF_TYPE_VIDEO_OVERLAY*/structv4l2_vbi_format vbi;/*V4L2_BUF_TYPE_VBI_CAPTURE*/structv4l2_sli...
应用使用时,parms.type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE; 通过parms->capture.capturemode 返回当前是 V4L2_MODE_VIDEO 或 V4L2_MODE_IMAGE; 通过parms->capture.timeperframe, 返回当前设置的帧率。 3.7 VIDIOC_ENUM_FMT 3.7.1 Parameters V4L2 format(struct v4l2_fmtdesc * fmtdesc) struct v4l2_fmtdes...
应用使用时,parms.type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE; 通过parms->capture.capturemode 返回当前是 V4L2_MODE_VIDEO 或 V4L2_MODE_IMAGE; 通过parms->capture.timeperframe, 返回当前设置的帧率。 3.7 VIDIOC_ENUM_FMT 3.7.1 Parameters 代码语言:javascript 复制 V4L2 format(struct v4l2_fmtdesc * fmt...
I'm using the v4l2-mem2mem infrastructure for a driver I'm writing and I'm looking if it's possible to have the capture vb2_queue to take both V4L2_BUF_TYPE_VIDEO_CAPTURE and V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE buffers, across instances....
memset(&buf, 0, sizeof buf); buf.index = i; buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; buf.memory = V4L2_MEMORY_DMABUF; buf.m.fd = buffer[i].dbuf_fd; ret = ioctl(v4lfd, VIDIOC_QBUF, &buf); BYE_ON(ret < 0, "VIDIOC_QBUF for buffer %d failed: %s (fd %u)\n", ...
V4L2框架简介V4L2(Video forlinux2)为linux中关于video设备的内核驱动。目前RK平台全部使用V4L2框架来操作摄像头设备。...V4L2框架的组成大致如下图所示图片V4L2里面有v4l2-subdev和v4l2_device,以及videobuf2-core三类设备。...由于从GC8034获取的图像需要进行前处理才能被用户层使用,因此需要使用ISP,将链路设置为GC803...
__u32type;//镇类型, 应用程序设置union{structv4l2_pix_formatpix;// 视频设备使用structv4l2_pix_format_mplanepix_mp;/* V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE */structv4l2_windowwin;/* V4L2_BUF_TYPE_VIDEO_OVERLAY */structv4l2_vbi_formatvbi;/* V4L2_BUF_TYPE_VBI_CAPTURE */structv4l2_sliced_vbi...
video.c static int capture_frame(void* capture,int (*set_disp_addr)(int,int,unsigned int*),pthread_mutex_t* mutex) { capture_handle* cap = (capture_handle*)capture; int ret; int i; struct v4l2_buffer buf; enum v4l2_buf_type type; fd_set fds; struct timeval tv; pthread_mutex_...