From fcfb1dc02a6baed23a85aa1186dc8aa9b2217f49 Mon Sep 17 00:00:00 2001 From: Jacopo Mondi Date: Mon, 19 Apr 2021 12:53:19 +0200 Subject: libcamera: raspberry: Report sensor timestamp Report the sensor's timestamp in the Request metadata by using the Unicam::Image buffer timestamp as an initial approximation. The buffer's timestamp is recorded at DMA-transfer time, and it does not theoretically matches the 'start of exposure' definition, but when used to compare two consecutive frames it gives an acceptable estimation of the sensor frame period duration. Reviewed-by: Hirokazu Honda Reviewed-by: Laurent Pinchart Reviewed-by: Naushir Patuck Signed-off-by: Jacopo Mondi --- src/libcamera/pipeline/raspberrypi/raspberrypi.cpp | 12 ++++++++++++ 1 file changed, 12 insertions(+) (limited to 'src/libcamera/pipeline') diff --git a/src/libcamera/pipeline/raspberrypi/raspberrypi.cpp b/src/libcamera/pipeline/raspberrypi/raspberrypi.cpp index 91f44f68..b2256493 100644 --- a/src/libcamera/pipeline/raspberrypi/raspberrypi.cpp +++ b/src/libcamera/pipeline/raspberrypi/raspberrypi.cpp @@ -1409,6 +1409,18 @@ void RPiCameraData::unicamBufferDequeue(FrameBuffer *buffer) << ", timestamp: " << buffer->metadata().timestamp; if (stream == &unicam_[Unicam::Image]) { + /* + * Record the sensor timestamp in the Request. + * + * \todo Do not assume the request in the front of the queue + * is the correct one + */ + Request *request = requestQueue_.front(); + ASSERT(request); + + request->metadata().set(controls::SensorTimestamp, + buffer->metadata().timestamp); + /* * Lookup the sensor controls used for this frame sequence from * DelayedControl and queue them along with the frame buffer. -- cgit v1.2.1