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{ "id": 9378, "url": "https://patchwork.libcamera.org/api/1.1/covers/9378/?format=api", "web_url": "https://patchwork.libcamera.org/cover/9378/", "project": { "id": 1, "url": "https://patchwork.libcamera.org/api/1.1/projects/1/?format=api", "name": "libcamera", "link_name": "libcamera", "list_id": "libcamera_core", "list_email": "libcamera-devel@lists.libcamera.org", "web_url": "", "scm_url": "", "webscm_url": "" }, "msgid": "<20200824204646.16866-1-email@uajain.com>", "date": "2020-08-24T20:46:53", "name": "[libcamera-devel,0/3] Initial EXIF metadata support", "submitter": { "id": 1, "url": "https://patchwork.libcamera.org/api/1.1/people/1/?format=api", "name": "Umang Jain", "email": "email@uajain.com" }, "mbox": "https://patchwork.libcamera.org/cover/9378/mbox/", "series": [ { "id": 1240, "url": "https://patchwork.libcamera.org/api/1.1/series/1240/?format=api", "web_url": "https://patchwork.libcamera.org/project/libcamera/list/?series=1240", "date": "2020-08-24T20:46:53", "name": "Initial EXIF metadata support", "version": 1, "mbox": "https://patchwork.libcamera.org/series/1240/mbox/" } ], "comments": "https://patchwork.libcamera.org/api/covers/9378/comments/", "headers": { "Return-Path": "<libcamera-devel-bounces@lists.libcamera.org>", "X-Original-To": "parsemail@patchwork.libcamera.org", "Delivered-To": "parsemail@patchwork.libcamera.org", "Received": [ "from lancelot.ideasonboard.com (lancelot.ideasonboard.com\n\t[92.243.16.209])\n\tby patchwork.libcamera.org (Postfix) with ESMTPS id 5266FBE174\n\tfor <parsemail@patchwork.libcamera.org>;\n\tMon, 24 Aug 2020 20:46:59 +0000 (UTC)", "from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id 1C59462886;\n\tMon, 24 Aug 2020 22:46:58 +0200 (CEST)", "from o1.f.az.sendgrid.net (o1.f.az.sendgrid.net [208.117.55.132])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id 47BEA6170D\n\tfor <libcamera-devel@lists.libcamera.org>;\n\tMon, 24 Aug 2020 22:46:55 +0200 (CEST)", "by filterdrecv-p3las1-c4cf4f4c5-xkgx4 with SMTP id\n\tfilterdrecv-p3las1-c4cf4f4c5-xkgx4-18-5F44273C-54\n\t2020-08-24 20:46:53.121276345 +0000 UTC m=+17333.395237647", "from mail.uajain.com (unknown)\n\tby ismtpd0006p1maa1.sendgrid.net (SG) with ESMTP id\n\t_yV0s2lMQeSzzrDhJ0axzw for <libcamera-devel@lists.libcamera.org>;\n\tMon, 24 Aug 2020 20:46:52.541 +0000 (UTC)" ], "Authentication-Results": "lancelot.ideasonboard.com;\n\tdkim=fail reason=\"signature verification failed\" (1024-bit key;\n\tunprotected) header.d=uajain.com header.i=@uajain.com\n\theader.b=\"x7LTnJvF\"; dkim-atps=neutral", "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed; d=uajain.com;\n\th=from:subject:mime-version:to:cc:content-transfer-encoding:\n\tcontent-type;\n\ts=s1; bh=x68/QGoXKPZAeUuahYD68q9TuzaUjle/BJcELKeMLmg=;\n\tb=x7LTnJvFV278Mp089sCYGHwBJc0Mpsrfab4oV3jksizeYb3SI1e3uKwPPHYNQ33o5tMv\n\t00Xu9VUG68bysLfGRLzCpN8ot4+RtKAE+mjVCKCmrPvrKN87QceVy1J/8eee1DAFGLhTJd\n\t8dTUKSIYuHeUySQjE9pfKhWvYRXal/pE0=", "From": "Umang Jain <email@uajain.com>", "Date": "Mon, 24 Aug 2020 20:46:53 +0000 (UTC)", "Message-Id": "<20200824204646.16866-1-email@uajain.com>", "Mime-Version": "1.0", "X-SG-EID": "1Q40EQ7YGir8a9gjSIAdTjhngY657NMk9ckeo4dbHZDiOpywc/L3L9rFqlwE4KPc9vLW9W8H4bP+KZ0PPVtun8fdbw/eKUFmYBZIBeqB3eXv3pPcVrLPTgUgIJzscGexFsNuij0gi+DyQ7gOrKNTAHrKRq64Hj6TF18B7QvOPwdgngto8gEhXq0US9zpbXzavs/QRYLynD6CQebyOWtr3a3MZPByxPeod9v4P2kH+kGVNc6T14tUqmVTMI6iPc0O6OU6R6uzxJkYn2jhmNd01Q==", "To": "libcamera-devel@lists.libcamera.org", "Subject": "[libcamera-devel] [PATCH 0/3] Initial EXIF metadata support", "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>", "Content-Type": "text/plain; charset=\"us-ascii\"", "Content-Transfer-Encoding": "7bit", "Errors-To": "libcamera-devel-bounces@lists.libcamera.org", "Sender": "\"libcamera-devel\" <libcamera-devel-bounces@lists.libcamera.org>" }, "content": "Hi all,\n\nThis patch series targets adding initial EXIF metadata support\nfor the frames captured in Android/Libcamera framework.\n\nIt is initial in the sense, it adds the base infrastructure for\nExif metadata support via 'libexif' and also encodes a initial\nset of metadata tags into the frames.\n\nTesting:\nThe testing of this work was carried out via vivid pipeline-handler\nin conjunction with patch in `cam` using EncoderLibJpeg as the\nfile sink [1]. That way we could see what EXIF metadata could be written\nand inspect that `exif` or `exiv2` commandline tools.\n\n($) ./build/src/cam/cam -c vivid -C5 -F -s pixelformat=NV12\n\nSample output (1): exif frame-stream0-000000.jpg\nEXIF tags in 'frame-stream0-000000.jpg' ('Intel' byte order):\n--------------------+----------------------------------------------------------\nTag |Value\n--------------------+----------------------------------------------------------\nImage Width |1280\nImage Length |720\nManufacturer |Libcamera\nModel |Camera2111\nOrientation |Bottom-left\nX-Resolution |72\nY-Resolution |72\nResolution Unit |Inch\nDate and Time |Sun Oct 13 07:03:20 734137\n\nYCbCr Positioning |Centered\nExif Version |Exif Version 2.1\nDate and Time (Origi|Sun Oct 13 07:03:20 734137\n\nDate and Time (Digit|Sun Oct 13 07:03:20 734137\n\nComponents Configura|Y Cb Cr -\nFlashPixVersion |FlashPix Version 1.0\nColor Space |Internal error (unknown value 65535)\nPixel X Dimension |1280\nPixel Y Dimension |720\n\n\n\nSample output (2): exiv2 frame-stream0-000000.jpg \nFile name : frame-stream0-000000.jpg\nFile size : 38787 Bytes\nMIME type : image/jpeg\nImage size : 1280 x 720\nCamera make : Libcamera\nCamera model : Camera2111\nImage timestamp : Sun Oct 13 07:03:20 734137\n\nImage number : \nExposure time : \nAperture : \nExposure bias : \nFlash : \nFlash bias : \nFocal length : \nSubject distance: \nISO speed : \nExposure mode : \nMetering mode : \nMacro mode : \nImage quality : \nExif Resolution : 1280 x 720\nWhite balance : \nThumbnail : None\nCopyright : \nExif comment : \n\nThere are still a lot of tags that needs to be populated,\nthat can be built on top of this groundwork.\n\n[1]: https://github.com/kbingham/libcamera/commit/10ed8ec\n\nKieran Bingham (1):\n libcamera: android: Add EXIF infrastructure\n\nUmang Jain (2):\n android: jpeg: Pass a Exif object while encoding\n android: Support initial set of EXIF metadata tags\n\n src/android/camera_device.cpp | 12 +-\n src/android/jpeg/encoder.h | 5 +-\n src/android/jpeg/encoder_libjpeg.cpp | 15 +-\n src/android/jpeg/encoder_libjpeg.h | 3 +-\n src/android/jpeg/exif.cpp | 210 +++++++++++++++++++++++++++\n src/android/jpeg/exif.h | 53 +++++++\n src/android/meson.build | 2 +\n 7 files changed, 296 insertions(+), 4 deletions(-)\n create mode 100644 src/android/jpeg/exif.cpp\n create mode 100644 src/android/jpeg/exif.h" }