主要的调用关系: enum v4l2_buf_type type = V4L2_BUF_TYPE_VIDEO_CAPTURE; if (ioctl(fd, VIDIOC_STREAMON, &type) < 0) { printf("ERR(%s):VIDIOC_STREAMON failed\n", __func__); return -1; } vidioc_streamon -> vb2_streamon -> vb2_core_streamon -> vb2_start_streaming -> call_qop(start_streaming --- start_streaming -> vb2_buffer_done |
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来自: charlie_linux > 《V4L2》