From patchwork Wed Jan 28 07:49:48 2026 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Paul Elder X-Patchwork-Id: 25984 Return-Path: X-Original-To: parsemail@patchwork.libcamera.org Delivered-To: parsemail@patchwork.libcamera.org Received: from lancelot.ideasonboard.com (lancelot.ideasonboard.com [92.243.16.209]) by patchwork.libcamera.org (Postfix) with ESMTPS id 6AF71C3200 for ; Wed, 28 Jan 2026 07:50:11 +0000 (UTC) Received: from lancelot.ideasonboard.com (localhost [IPv6:::1]) by lancelot.ideasonboard.com (Postfix) with ESMTP id BB81261FC9; Wed, 28 Jan 2026 08:50:10 +0100 (CET) Authentication-Results: lancelot.ideasonboard.com; dkim=pass (1024-bit key; unprotected) header.d=ideasonboard.com header.i=@ideasonboard.com header.b="iCL07mgz"; dkim-atps=neutral Received: from perceval.ideasonboard.com (perceval.ideasonboard.com [213.167.242.64]) by lancelot.ideasonboard.com (Postfix) with ESMTPS id 17CCE61A35 for ; Wed, 28 Jan 2026 08:50:09 +0100 (CET) Received: from neptunite.hamster-moth.ts.net (unknown [IPv6:2404:7a81:160:2100:508d:7983:72a6:2eeb]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id 2086373B; Wed, 28 Jan 2026 08:49:29 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1769586571; bh=Ikhnz3U+nfyBSZ4iGmrNlkOSWefRRHbZ4PwSTfeYqIc=; h=From:To:Cc:Subject:Date:From; b=iCL07mgzen9xxkIy6+gwIf1vaNz2TaPGtRf247DBvOhQ6VteT7iipha2L4AcQ8fR6 EwMNdES0dVAVbp9bYk9snhBwLcfB9YyR0HolqNTI9YFBGcNyU7tOmhYBo1ggyJXIkR /558mEIzhyova8o786JrydVmy7AJ4UReLrgzeZcM= From: Paul Elder To: libcamera-devel@lists.libcamera.org Cc: Paul Elder , kieran.bingham@ideasonboard.com, stefan.klug@ideasonboard.com, barnabas.pocze@ideasonboard.com Subject: [PATCH v5 0/8] Add Layers support Date: Wed, 28 Jan 2026 16:49:48 +0900 Message-ID: <20260128074956.760538-1-paul.elder@ideasonboard.com> X-Mailer: git-send-email 2.47.2 MIME-Version: 1.0 X-BeenThere: libcamera-devel@lists.libcamera.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: libcamera-devel-bounces@lists.libcamera.org Sender: "libcamera-devel" This series introduces a new concept to libcamera, called Layers. They sit between the application and the Camera, and hook into a subset of the Camera calls. This allows things that don't belong inside a Camera/IPA nor inside an application to be implemented, such as the Sync algorithm. As a light demonstration of the capabilities of Layers, this series implements a Layer that intercepts all control-related calls to implement the AeEnable control transparently. Patches 1~3 are refactoring and reorganizing existing code. Patch 4 implements the LayerManager, which is the main component. Patch 5~6 connects the Camera to the layer infrastructure. Finally patches 7~8 implement a simple layer that implements the AeEnable control, to demonstrate how a Layer might work. v2 most notably reorganizes the LayerManager to be under the CameraManager instead of the Camera, and adds support for closures so that each layer can store its data per camera. v3 adds the LayerController that belongs to each Camera, one to simplify code and to make it more correct in terms of ownership, but also to pave the way for each Camera to select different layers. This is not implemented at the moment however as it requires configuration file support. v4 adds a LayerInstance class that bundles a LayerLoaded together with its closure, and simplifies code for LayerController when it checks that the layer implements a function before calling it from its vtable No changes in v5; just a rebase and resend because it's been a long time since v4. Paul Elder (8): libcamera: ipa_manager: Factor out .so file searching libcamera: ipa_module: Factor out ELF file handling libcamera: camera: Add indirection to Camera signal emissions libcamera: layer_manager: Add Layer handling implementation libcamera: camera_manager: Add LayerManager libcamera: camera: Hook into the LayerManager layer: Add layer to inject AeEnable control camera, ipa: all: Remove AeEnable handling include/libcamera/internal/camera.h | 8 + include/libcamera/internal/camera_manager.h | 3 + include/libcamera/internal/ipa_manager.h | 4 - include/libcamera/internal/layer_manager.h | 199 ++++++ include/libcamera/internal/meson.build | 2 + include/libcamera/internal/utils.h | 29 + include/libcamera/layer.h | 54 ++ include/libcamera/meson.build | 1 + src/ipa/mali-c55/algorithms/agc.cpp | 1 + src/ipa/rkisp1/algorithms/agc.cpp | 2 - src/ipa/rpi/common/ipa_base.cpp | 2 - src/layer/inject_controls/inject_controls.cpp | 176 +++++ src/layer/inject_controls/inject_controls.h | 24 + src/layer/inject_controls/meson.build | 16 + src/layer/meson.build | 16 + src/libcamera/camera.cpp | 113 ++-- src/libcamera/camera_manager.cpp | 1 + src/libcamera/ipa_manager.cpp | 107 +--- src/libcamera/ipa_module.cpp | 152 +---- src/libcamera/layer.cpp | 178 ++++++ src/libcamera/layer_manager.cpp | 601 ++++++++++++++++++ src/libcamera/meson.build | 3 + src/libcamera/pipeline/uvcvideo/uvcvideo.cpp | 5 - src/libcamera/pipeline_handler.cpp | 2 +- src/libcamera/request.cpp | 2 +- src/libcamera/utils.cpp | 270 ++++++++ src/meson.build | 1 + 27 files changed, 1678 insertions(+), 294 deletions(-) create mode 100644 include/libcamera/internal/layer_manager.h create mode 100644 include/libcamera/internal/utils.h create mode 100644 include/libcamera/layer.h create mode 100644 src/layer/inject_controls/inject_controls.cpp create mode 100644 src/layer/inject_controls/inject_controls.h create mode 100644 src/layer/inject_controls/meson.build create mode 100644 src/layer/meson.build create mode 100644 src/libcamera/layer.cpp create mode 100644 src/libcamera/layer_manager.cpp create mode 100644 src/libcamera/utils.cpp