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authorPaul Elder <paul.elder@ideasonboard.com>2020-06-16 16:40:34 +0900
committerPaul Elder <paul.elder@ideasonboard.com>2020-06-25 23:47:13 +0900
commit566ccd75cafd0bd9d60d350405ca7d337786ae39 (patch)
tree77208d0cfc8c0eec0886bc1b5a5ba73c6efdba46 /src/cam/buffer_writer.h
parentf155e638168cb0d6cbd9dde8748301fa12a0736f (diff)
v4l2: v4l2_camera: Don't use libcamera::Semaphore for available buffers
In V4L2, a blocked dqbuf should not not also block a streamoff. This means that on streamoff, the blocked dqbuf must return (with error). We cannot do this with the libcamera semaphore, so pull out the necessary components of a semaphore, and put them into V4L2Camera, so that dqbuf from V4L2CameraProxy can wait on a disjunct condition of the availability of the semaphore or the stopping of the stream. Signed-off-by: Paul Elder <paul.elder@ideasonboard.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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