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commit 02f608b64d27761a2c953bcfc398dc93f30f4ac8 Author: Xiang Xiao <[email protected]> AuthorDate: Tue Dec 6 19:21:37 2022 +0800 examples/camera: Call VIDIOC_S_FMT before VIDIOC_REQBUFS Signed-off-by: Xiang Xiao <[email protected]> --- examples/camera/camera_main.c | 28 ++++++++++++++-------------- 1 file changed, 14 insertions(+), 14 deletions(-) diff --git a/examples/camera/camera_main.c b/examples/camera/camera_main.c index 024d68f13..e9c9f0bab 100644 --- a/examples/camera/camera_main.c +++ b/examples/camera/camera_main.c @@ -131,20 +131,6 @@ static int camera_prepare(int fd, enum v4l2_buf_type type, 0 }; - /* VIDIOC_REQBUFS initiate user pointer I/O */ - - req.type = type; - req.memory = V4L2_MEMORY_USERPTR; - req.count = buffernum; - req.mode = buf_mode; - - ret = ioctl(fd, VIDIOC_REQBUFS, (unsigned long)&req); - if (ret < 0) - { - printf("Failed to VIDIOC_REQBUFS: errno = %d\n", errno); - return ret; - } - /* VIDIOC_S_FMT set format */ fmt.type = type; @@ -160,6 +146,20 @@ static int camera_prepare(int fd, enum v4l2_buf_type type, return ret; } + /* VIDIOC_REQBUFS initiate user pointer I/O */ + + req.type = type; + req.memory = V4L2_MEMORY_USERPTR; + req.count = buffernum; + req.mode = buf_mode; + + ret = ioctl(fd, VIDIOC_REQBUFS, (unsigned long)&req); + if (ret < 0) + { + printf("Failed to VIDIOC_REQBUFS: errno = %d\n", errno); + return ret; + } + /* Prepare video memory to store images */ *vbuf = malloc(sizeof(v_buffer_t) * buffernum);
