{"id":9904,"url":"https://patchwork.libcamera.org/api/covers/9904/?format=json","web_url":"https://patchwork.libcamera.org/cover/9904/","project":{"id":1,"url":"https://patchwork.libcamera.org/api/projects/1/?format=json","name":"libcamera","link_name":"libcamera","list_id":"libcamera_core","list_email":"libcamera-devel@lists.libcamera.org","web_url":"","scm_url":"","webscm_url":""},"msgid":"<20201002103416.53623-1-email@uajain.com>","date":"2020-10-02T10:34:13","name":"[libcamera-devel,v1,0/3] Basic NV12 image thumbnailer","submitter":{"id":1,"url":"https://patchwork.libcamera.org/api/people/1/?format=json","name":"Umang Jain","email":"email@uajain.com"},"mbox":"https://patchwork.libcamera.org/cover/9904/mbox/","series":[{"id":1346,"url":"https://patchwork.libcamera.org/api/series/1346/?format=json","web_url":"https://patchwork.libcamera.org/project/libcamera/list/?series=1346","date":"2020-10-02T10:34:13","name":"Basic NV12 image thumbnailer","version":1,"mbox":"https://patchwork.libcamera.org/series/1346/mbox/"}],"comments":"https://patchwork.libcamera.org/api/covers/9904/comments/","headers":{"Return-Path":"","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 E66AEC3B5C\n\tfor ;\n\tFri, 2 Oct 2020 10:34:23 +0000 (UTC)","from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id 6C4F9623B6;\n\tFri, 2 Oct 2020 12:34:23 +0200 (CEST)","from mail.uajain.com (static.126.159.217.95.clients.your-server.de\n\t[95.217.159.126])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id 6123D6035D\n\tfor ;\n\tFri, 2 Oct 2020 12:34:22 +0200 (CEST)"],"Authentication-Results":"lancelot.ideasonboard.com;\n\tdkim=fail reason=\"signature verification failed\" (2048-bit key;\n\tunprotected) header.d=uajain.com header.i=@uajain.com\n\theader.b=\"qxGYQcly\"; dkim-atps=neutral","From":"Umang Jain ","DKIM-Signature":"v=1; a=rsa-sha256; c=relaxed/simple; d=uajain.com; s=mail;\n\tt=1601634861; bh=gUaLFqfJRj+M+9OLnXMKkaP0Dxg5rU6q+y9+60dKi7M=;\n\th=From:To:Cc:Subject;\n\tb=qxGYQclyN6zLvNiNHSfrnQGm2A7cKrB8m2hFhyKPiB2TEDvpBLmdP+MqEjAyDjJcz\n\tIFAX2Uui+XKdssjg9T/Og6GJ8cVp7wzLT53Vp9ss18NMcmp8N5MGvmzD5nB0MNDacT\n\t2m2/9O8h5fGPBX4YacM9IlPhuhbNMGhKMIJL335frCbz4nQGMfpBFpd02+XG6OMisT\n\tGO6RTSWDbuHvksBxQ/gHHhgWriXvHqReNlNXsUNVZNIA4j4a9kpGqGbJN4uzuTtMd3\n\tzupt4CVQ7Mh7Ofnx/LcxIKrAI6RwdKB1g5PejdGp4tjBEs7e4tHjD6LypjK3yQ+vCu\n\twQRROs9lxiYtg==","To":"libcamera-devel@lists.libcamera.org","Date":"Fri, 2 Oct 2020 16:04:13 +0530","Message-Id":"<20201002103416.53623-1-email@uajain.com>","Mime-Version":"1.0","Subject":"[libcamera-devel] [PATCH v1 0/3] Basic NV12 image thumbnailer","X-BeenThere":"libcamera-devel@lists.libcamera.org","X-Mailman-Version":"2.1.29","Precedence":"list","List-Id":"","List-Unsubscribe":",\n\t","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n\t","Content-Type":"text/plain; charset=\"us-ascii\"","Content-Transfer-Encoding":"7bit","Errors-To":"libcamera-devel-bounces@lists.libcamera.org","Sender":"\"libcamera-devel\" "},"content":"Hi,\n\nThis series targets generation of a image thumbnail for the EXIF\nmetadata of the frames captured via android HAL. The thumbnailer is\ntakes in a NV12 buffer and outputs the same but with scaled down(or\nup, if you want) buffer. Embedding the buffer via libexif is still a\nfollow-up task I am looking into, you will find a \\todo in that regard.\n\nTwo [DNI] patches for dev-info are also included, if anyone is\ninterested in building / trying out locally. You shall get the dev\nbranch on my fork: https://github.com/uajain/libcamera.\n\nThanks.\n\nUmang Jain (3):\n android: jpeg: Add a basic NV12 image thumbnailer\n [DNI] jpeg/thumbnailer: write thumbnail to file\n [DNI] Add HOWTO scaler instructions for future reference\n\n scaler-instructions.txt | 18 ++++\n src/android/jpeg/encoder_libjpeg.cpp | 12 +++\n src/android/jpeg/thumbnailer.cpp | 128 +++++++++++++++++++++++++++\n src/android/jpeg/thumbnailer.h | 34 +++++++\n src/android/meson.build | 1 +\n 5 files changed, 193 insertions(+)\n create mode 100644 scaler-instructions.txt\n create mode 100644 src/android/jpeg/thumbnailer.cpp\n create mode 100644 src/android/jpeg/thumbnailer.h"}