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\n\tThu, 18 Nov 2021 07:20:25 -0800 (PST)", "From": "David Plowman <david.plowman@raspberrypi.com>", "To": "laurent.pinchart@ideasonboard.com, kieran.bingham@ideasonboard.com,\n\thverkuil-cisco@xs4all.nl, tfiga@google.com, jacopo@jmondi.org,\n\tnaush@raspberrypi.com, libcamera-devel@lists.libcamera.org", "Date": "Thu, 18 Nov 2021 15:19:26 +0000", "Message-Id": "<20211118151933.15627-1-david.plowman@raspberrypi.com>", "X-Mailer": "git-send-email 2.20.1", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "Subject": "[libcamera-devel] [PATCH v6 0/7] Colour spaces", "X-BeenThere": "libcamera-devel@lists.libcamera.org", "X-Mailman-Version": "2.1.29", "Precedence": "list", "List-Id": "<libcamera-devel.lists.libcamera.org>", "List-Unsubscribe": "<https://lists.libcamera.org/options/libcamera-devel>,\n\t<mailto:libcamera-devel-request@lists.libcamera.org?subject=unsubscribe>", "List-Archive": "<https://lists.libcamera.org/pipermail/libcamera-devel/>", "List-Post": "<mailto:libcamera-devel@lists.libcamera.org>", "List-Help": "<mailto:libcamera-devel-request@lists.libcamera.org?subject=help>", "List-Subscribe": "<https://lists.libcamera.org/listinfo/libcamera-devel>,\n\t<mailto:libcamera-devel-request@lists.libcamera.org?subject=subscribe>", "Errors-To": "libcamera-devel-bounces@lists.libcamera.org", "Sender": "\"libcamera-devel\" <libcamera-devel-bounces@lists.libcamera.org>" }, "content": "Hi everyone\n\nThanks very much to everyone who took part in the call the other day,\nI think it's a big help in trying to get important topics unblocked!\n\nFollowing on from that, here's a v6 version of this patch set. There\nare a few things to point out:\n\n* std::optional has reappeared, so you can now avoid saying what\n colour space you want. std::optional percolates all the way down to\n our V4L2 interface where an unset colour space will result in\n passing \"all default\" to the actual driver.\n\n* The set of colour spaces I've defined for the ColorSpace class is\n pretty minimal, though it includes, I expect, the vast majority of\n real use cases. But we should add others that folks expect to use.\n\n* If a device uses a colour space that isn't included in the\n ColorSpace class list, then an error message will be output though\n the program will continue. This indicates that you really ought to\n take a look and consider adding the missing ColorSpace.\n\n* Actually, given that we use std::optional, if a device's colour\n space doesn't have a matching ColorSpace, then it will return an\n \"unset\" value. (Whenever you get \"unset\" back as the colour space,\n then that's definitely a warning sign.)\n\n* There's a corner case about metadata pads - unsurprisingly we can't\n find a matching ColorSpace so you get a warning printed out. Is\n there a \"proper\" way to detect that it's a metadata pad in that bit\n of code?\n\n* We did talk about having the StreamConfiguration contain a list of\n the acceptable colour spaces. I haven't added that yet, do we want\n to? We could do so as an extra patch.\n\nI'm sorry if it feels a bit like we're starting again here, but\nhopefully we're now moving forwards rather than round in circles, with\nminimal risk of completely changing our minds!\n\nThanks again\nDavid\n\n\nDavid Plowman (7):\n libcamera: Add ColorSpace class\n libcamera: Add ColorSpace fields to StreamConfiguration\n libcamera: Convert between ColorSpace class and V4L2 formats\n libcamera: Support passing ColorSpaces to V4L2 video devices\n libcamera: Support passing ColorSpaces to V4L2 subdevices\n libcamera: Add validateColorSpaces to CameraConfiguration class\n libcamera: pipeline: raspberrypi: Support color spaces\n\n include/libcamera/camera.h | 2 +\n include/libcamera/color_space.h | 79 ++++++\n include/libcamera/internal/v4l2_device.h | 7 +\n include/libcamera/internal/v4l2_subdevice.h | 2 +\n include/libcamera/internal/v4l2_videodevice.h | 2 +\n include/libcamera/meson.build | 1 +\n include/libcamera/stream.h | 3 +\n src/libcamera/camera.cpp | 51 ++++\n src/libcamera/camera_sensor.cpp | 1 +\n src/libcamera/color_space.cpp | 243 ++++++++++++++++++\n src/libcamera/meson.build | 1 +\n .../pipeline/raspberrypi/raspberrypi.cpp | 42 +++\n src/libcamera/stream.cpp | 14 +\n src/libcamera/v4l2_device.cpp | 190 ++++++++++++++\n src/libcamera/v4l2_subdevice.cpp | 35 ++-\n src/libcamera/v4l2_videodevice.cpp | 53 +++-\n 16 files changed, 721 insertions(+), 5 deletions(-)\n create mode 100644 include/libcamera/color_space.h\n create mode 100644 src/libcamera/color_space.cpp" }