Cover Letter Detail
Show a cover letter.
GET /api/1.1/covers/23658/?format=api
{ "id": 23658, "url": "https://patchwork.libcamera.org/api/1.1/covers/23658/?format=api", "web_url": "https://patchwork.libcamera.org/cover/23658/", "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": "<20250626095944.1746345-1-paul.elder@ideasonboard.com>", "date": "2025-06-26T09:59:35", "name": "[RFC,0/7] Add Layers support", "submitter": { "id": 17, "url": "https://patchwork.libcamera.org/api/1.1/people/17/?format=api", "name": "Paul Elder", "email": "paul.elder@ideasonboard.com" }, "mbox": "https://patchwork.libcamera.org/cover/23658/mbox/", "series": [ { "id": 5251, "url": "https://patchwork.libcamera.org/api/1.1/series/5251/?format=api", "web_url": "https://patchwork.libcamera.org/project/libcamera/list/?series=5251", "date": "2025-06-26T09:59:35", "name": "Add Layers support", "version": 1, "mbox": "https://patchwork.libcamera.org/series/5251/mbox/" } ], "comments": "https://patchwork.libcamera.org/api/covers/23658/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 C57EEBDCBF\n\tfor <parsemail@patchwork.libcamera.org>;\n\tThu, 26 Jun 2025 10:00:15 +0000 (UTC)", "from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id 81EB668DF6;\n\tThu, 26 Jun 2025 12:00:15 +0200 (CEST)", "from perceval.ideasonboard.com (perceval.ideasonboard.com\n\t[IPv6:2001:4b98:dc2:55:216:3eff:fef7:d647])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id 235F868DE8\n\tfor <libcamera-devel@lists.libcamera.org>;\n\tThu, 26 Jun 2025 12:00:14 +0200 (CEST)", "from neptunite.hamster-moth.ts.net (unknown\n\t[IPv6:2404:7a81:160:2100:258b:9e43:6dff:c39d])\n\tby perceval.ideasonboard.com (Postfix) with ESMTPSA id 4C99C6AE;\n\tThu, 26 Jun 2025 11:59:54 +0200 (CEST)" ], "Authentication-Results": "lancelot.ideasonboard.com; dkim=pass (1024-bit key;\n\tunprotected) header.d=ideasonboard.com header.i=@ideasonboard.com\n\theader.b=\"dNvJW+ls\"; dkim-atps=neutral", "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com;\n\ts=mail; t=1750931995;\n\tbh=mmorMg534SxD9viJQuEBmJyF+ov+qlQM18sycvCxFGk=;\n\th=From:To:Cc:Subject:Date:From;\n\tb=dNvJW+lsM8FEseuWkr4PD2y3l8RVpZJe6TMNkGAsjlDB0wVOKYpdG/4xpRFykiNna\n\tLtgWUhMWBzGLuBwTrSwYUK/KmAW8riyMCKy/1nxgWX+2lji8k7D54VuSHtRspjKklA\n\tiReikNEpj0WFSupdKULSJdeByy9k1TBgmw45QcVQ=", "From": "Paul Elder <paul.elder@ideasonboard.com>", "To": "libcamera-devel@lists.libcamera.org", "Cc": "Paul Elder <paul.elder@ideasonboard.com>, kieran.bingham@ideasonboard.com", "Subject": "[RFC PATCH 0/7] Add Layers support", "Date": "Thu, 26 Jun 2025 18:59:35 +0900", "Message-ID": "<20250626095944.1746345-1-paul.elder@ideasonboard.com>", "X-Mailer": "git-send-email 2.47.2", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "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": "This series introduces a new concept to libcamera, called Layers. They\nsit between the application and the Camera, and hook into a subset of\nthe Camera calls. This allows things that don't belong inside a\nCamera/IPA nor inside an application to be implemented, such as the Sync\nalgorithm. As a light demonstration of the capabilities of Layers, this\nseries implements a Layer that intercepts all control-related calls to\nimplement the AeEnable control transparently.\n\nPatches 1~3 are refactoring and reorganizing existing code. Patch 4\nimplements the LayerManager, which is the main component. Patch 5\nconnects the Camera to the layer infrastructure. Finally patches 6~7\nimplement a simple layer that implements the AeEnable control, to\ndemonstrate how a Layer might work.\n\nPaul Elder (7):\n libcamera: ipa_manager: Factor out .so file searching\n libcamera: ipa_module: Factor out ELF file handling\n libcamera: camera: Add indirection to Camera signal emissions\n libcamera: layer_manager: Add LayerManager implementation\n libcamera: camera: Hook into the LayerManager\n layer: Add layer to inject AeEnable control\n camera, ipa: all: Remove AeEnable handling\n\n include/libcamera/internal/camera.h | 8 +\n include/libcamera/internal/ipa_manager.h | 4 -\n include/libcamera/internal/layer_manager.h | 74 +++++\n include/libcamera/internal/meson.build | 2 +\n include/libcamera/internal/utils.h | 32 ++\n include/libcamera/layer.h | 56 ++++\n include/libcamera/meson.build | 1 +\n src/ipa/mali-c55/algorithms/agc.cpp | 1 +\n src/ipa/rkisp1/algorithms/agc.cpp | 2 -\n src/ipa/rpi/common/ipa_base.cpp | 2 -\n src/layer/inject_controls/inject_controls.cpp | 164 +++++++++\n src/layer/inject_controls/inject_controls.h | 29 ++\n src/layer/inject_controls/meson.build | 15 +\n src/layer/meson.build | 12 +\n src/libcamera/camera.cpp | 66 ++--\n src/libcamera/ipa_manager.cpp | 108 ++----\n src/libcamera/ipa_module.cpp | 152 +--------\n src/libcamera/layer_manager.cpp | 314 ++++++++++++++++++\n src/libcamera/meson.build | 2 +\n src/libcamera/pipeline/uvcvideo/uvcvideo.cpp | 5 -\n src/libcamera/pipeline_handler.cpp | 2 +-\n src/libcamera/request.cpp | 2 +-\n src/libcamera/utils.cpp | 264 +++++++++++++++\n src/meson.build | 1 +\n 24 files changed, 1042 insertions(+), 276 deletions(-)\n create mode 100644 include/libcamera/internal/layer_manager.h\n create mode 100644 include/libcamera/internal/utils.h\n create mode 100644 include/libcamera/layer.h\n create mode 100644 src/layer/inject_controls/inject_controls.cpp\n create mode 100644 src/layer/inject_controls/inject_controls.h\n create mode 100644 src/layer/inject_controls/meson.build\n create mode 100644 src/layer/meson.build\n create mode 100644 src/libcamera/layer_manager.cpp\n create mode 100644 src/libcamera/utils.cpp" }