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v4l2: v4l2_camera_proxy: Fix timestamp calculation

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The V4L2 Compatibility layer is returning timestamps for buffers which
are incorrectly calculated from the frame metadata.

The sec component of the timestamp is correct, but the usec component is
out, leaving frame captures reporting non-monotonically increasing
timestamps, and incorrect frame rate calculations.

Fix the usecs calculation reported by the V4L2 adaptation layer.

Bug: https://bugs.libcamera.org/show_bug.cgi?id=118
Fixes: 0ce8f2390b ("v4l2: v4l2_compat: Add V4L2 compatibility layer")
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
This commit is contained in:
Kieran Bingham 2022-02-14 12:39:51 +00:00
parent 1966b9a584
commit 039a6a02d0
1 changed files with 1 additions and 1 deletions
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2
src/v4l2/v4l2_camera_proxy.cpp
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@ -231,7 +231,7 @@ void V4L2CameraProxy::updateBuffers()
});
buf.field = V4L2_FIELD_NONE;
buf.timestamp.tv_sec = fmd.timestamp / 1000000000;
buf.timestamp.tv_usec = fmd.timestamp % 1000000;
buf.timestamp.tv_usec = (fmd.timestamp / 1000) % 1000000;
buf.sequence = fmd.sequence;
buf.flags |= V4L2_BUF_FLAG_DONE;