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examples/camera: Call VIDIOC_S_FMT before VIDIOC_REQBUFS

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Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>
This commit is contained in:
Xiang Xiao 2022-12-06 19:21:37 +08:00 committed by Petro Karashchenko
parent ca855f3f23
commit 02f608b64d
1 changed files with 14 additions and 14 deletions
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28
examples/camera/camera_main.c
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@ -131,20 +131,6 @@ static int camera_prepare(int fd, enum v4l2_buf_type type,
0 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 */ /* VIDIOC_S_FMT set format */
fmt.type = type; fmt.type = type;
@ -160,6 +146,20 @@ static int camera_prepare(int fd, enum v4l2_buf_type type,
return ret; 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 */ /* Prepare video memory to store images */
*vbuf = malloc(sizeof(v_buffer_t) * buffernum); *vbuf = malloc(sizeof(v_buffer_t) * buffernum);