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authorNaushir Patuck <naush@raspberrypi.com>2020-09-18 10:42:27 +0100
committerNiklas Söderlund <niklas.soderlund@ragnatech.se>2020-09-21 13:10:48 +0200
commit2df7bf168105d02e7f2cb8090938d58eccd208f1 (patch)
tree711fff9f67387d49015721c75894e7f47af043b1 /test/log
parent3e7ee080d6dcc3f674ccdd14e08b7cf25df06ddd (diff)
libcamera: pipeline: raspberrypi: Rework stream buffer logic for zero-copy
Stop using v4l2_videodevice::allocateBuffer() for internal buffers and instead export/import all buffers. This allows the pipeline to return any stream buffer requested by the application as zero-copy. Advertise the Unicam Image stream as the RAW capture stream now. The RPiStream object now maintains a new list of buffers that are available to queue into a device. This is needed to distinguish between FrameBuffers allocated for internal use vs externally provided buffers. When a Request comes in, if a buffer is not provided for an exported stream, we re-use a buffer from this list. Signed-off-by: Naushir Patuck <naush@raspberrypi.com> Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Tested-by: David Plowman <david.plowman@raspberrypi.com> Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
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