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{ "id": 26028, "url": "https://patchwork.libcamera.org/api/1.1/covers/26028/?format=api", "web_url": "https://patchwork.libcamera.org/cover/26028/", "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": "<20260129082814.1777779-1-paul.elder@ideasonboard.com>", "date": "2026-01-29T08:28:06", "name": "[v6,0/8] 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/26028/mbox/", "series": [ { "id": 5753, "url": "https://patchwork.libcamera.org/api/1.1/series/5753/?format=api", "web_url": "https://patchwork.libcamera.org/project/libcamera/list/?series=5753", "date": "2026-01-29T08:28:06", "name": "Add Layers support", "version": 6, "mbox": "https://patchwork.libcamera.org/series/5753/mbox/" } ], "comments": "https://patchwork.libcamera.org/api/covers/26028/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 8360DC3226\n\tfor <parsemail@patchwork.libcamera.org>;\n\tThu, 29 Jan 2026 08:28:27 +0000 (UTC)", "from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id A552961FD2;\n\tThu, 29 Jan 2026 09:28:26 +0100 (CET)", "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 EB345615B2\n\tfor <libcamera-devel@lists.libcamera.org>;\n\tThu, 29 Jan 2026 09:28:24 +0100 (CET)", "from neptunite.flets-east.jp (unknown\n\t[IPv6:2404:7a81:160:2100:2eea:f891:1bd7:2691])\n\tby perceval.ideasonboard.com (Postfix) with ESMTPSA id 2D1596A6;\n\tThu, 29 Jan 2026 09:27:44 +0100 (CET)" ], "Authentication-Results": "lancelot.ideasonboard.com; dkim=pass (1024-bit key;\n\tunprotected) header.d=ideasonboard.com header.i=@ideasonboard.com\n\theader.b=\"wn4zB5FE\"; dkim-atps=neutral", "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com;\n\ts=mail; t=1769675267;\n\tbh=GLdZSCGcD3ryJAxc7EZvZJ0FdBnOHm2A16U1DGxWy78=;\n\th=From:To:Cc:Subject:Date:From;\n\tb=wn4zB5FE0keePC/gOCwEV3tulAwY+QIbXT1o6BmDsfg5clpRB/PP+7k5a18qNPcmd\n\tkomKzOuR3clpX9/K5DvS0/ApYvBN/0fsDPfH/Yq5zcVTd5Kh5iSbHqQyYPk/vj9jYg\n\tz4kXb+nIWeGdO42hPNxq/qUwxQreH64nnOnsTzBI=", "From": "Paul Elder <paul.elder@ideasonboard.com>", "To": "libcamera-devel@lists.libcamera.org", "Cc": "Paul Elder <paul.elder@ideasonboard.com>, kieran.bingham@ideasonboard.com,\n\tstefan.klug@ideasonboard.com, barnabas.pocze@ideasonboard.com", "Subject": "[PATCH v6 0/8] Add Layers support", "Date": "Thu, 29 Jan 2026 17:28:06 +0900", "Message-ID": "<20260129082814.1777779-1-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 5~6\nconnects the Camera to the layer infrastructure. Finally patches 7~8\nimplement a simple layer that implements the AeEnable control, to\ndemonstrate how a Layer might work.\n\nv2 most notably reorganizes the LayerManager to be under the\nCameraManager instead of the Camera, and adds support for closures so\nthat each layer can store its data per camera.\n\nv3 adds the LayerController that belongs to each Camera, one to simplify\ncode and to make it more correct in terms of ownership, but also to pave\nthe way for each Camera to select different layers. This is not\nimplemented at the moment however as it requires configuration file\nsupport.\n\nv4 adds a LayerInstance class that bundles a LayerLoaded together with\nits closure, and simplifies code for LayerController when it checks\nthat the layer implements a function before calling it from its vtable\n\nNo changes in v5; just a rebase and resend because it's been a long time\nsince v4.\n\nv6 fixes an API change that wasn't caught in v5, that metadata of\nRequest can no longer be modified directly.\n\nPaul Elder (8):\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 Layer handling implementation\n libcamera: camera_manager: Add LayerManager\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/camera_manager.h | 3 +\n include/libcamera/internal/ipa_manager.h | 4 -\n include/libcamera/internal/layer_manager.h | 205 ++++++\n include/libcamera/internal/meson.build | 2 +\n include/libcamera/internal/utils.h | 29 +\n include/libcamera/layer.h | 54 ++\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 | 177 +++++\n src/layer/inject_controls/inject_controls.h | 24 +\n src/layer/inject_controls/meson.build | 16 +\n src/layer/meson.build | 16 +\n src/libcamera/camera.cpp | 115 ++--\n src/libcamera/camera_manager.cpp | 1 +\n src/libcamera/ipa_manager.cpp | 107 +--\n src/libcamera/ipa_module.cpp | 152 +----\n src/libcamera/layer.cpp | 179 +++++\n src/libcamera/layer_manager.cpp | 612 ++++++++++++++++++\n src/libcamera/meson.build | 3 +\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 | 269 ++++++++\n src/meson.build | 1 +\n 27 files changed, 1698 insertions(+), 294 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.cpp\n create mode 100644 src/libcamera/layer_manager.cpp\n create mode 100644 src/libcamera/utils.cpp" }