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libcamera: v4l2_videodevice: Track streaming state

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Track the state of streamon/streamoff calls to simplify error paths.

Ensuring that streamOff() can be called on non-streaming streams
facilitates simpler error code paths, where a set of devices can all
call streamOff regardless of their initialisation state.

Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Signed-off-by: Umang Jain <email@uajain.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
This commit is contained in:
Kieran Bingham 2021-01-12 10:21:39 +05:30
parent 5988661c90
commit c0bad607ce
2 changed files with 13 additions and 1 deletions
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2
include/libcamera/internal/v4l2_videodevice.h
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@ -249,6 +249,8 @@ private:
std::map<unsigned int, FrameBuffer *> queuedBuffers_;
EventNotifier *fdBufferNotifier_;
bool streaming_;
};
class V4L2M2MDevice