From patchwork Tue Dec 10 15:34:30 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Milan Zamazal X-Patchwork-Id: 22276 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 A81CBC3257 for ; Tue, 10 Dec 2024 15:34:58 +0000 (UTC) Received: from lancelot.ideasonboard.com (localhost [IPv6:::1]) by lancelot.ideasonboard.com (Postfix) with ESMTP id 6350F618AF; Tue, 10 Dec 2024 16:34:58 +0100 (CET) Authentication-Results: lancelot.ideasonboard.com; dkim=pass (1024-bit key; unprotected) header.d=redhat.com header.i=@redhat.com header.b="Lgiu65fx"; dkim-atps=neutral Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by lancelot.ideasonboard.com (Postfix) with ESMTPS id 12F29618AF for ; Tue, 10 Dec 2024 16:34:55 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1733844895; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=RDZ1XfLJW/79QojK61k99zobyuODXZbXMf5BuH1uct0=; b=Lgiu65fxEHLgK4v3ONVXiYkFuOQnLZsKCSy8Qf+OrsdTqxEps1gMf9noYUet1zo4fEuo7S dLwf9feFV0Lf52hHwLySRjO6Wk/Wi4Z6/FFLFBefYlnNmnob7Wm8KIWrIZHQvOdFPHjrDl rcxf4cFriySDLXR3aUIG5VTd58yCYYo= Received: from mx-prod-mc-02.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-145-hCPFUvz2NRy_tcnXjfkNpA-1; Tue, 10 Dec 2024 10:34:49 -0500 X-MC-Unique: hCPFUvz2NRy_tcnXjfkNpA-1 X-Mimecast-MFC-AGG-ID: hCPFUvz2NRy_tcnXjfkNpA Received: from mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.17]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-02.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 693321956046; Tue, 10 Dec 2024 15:34:48 +0000 (UTC) Received: from nuthatch.redhat.com (unknown [10.45.224.8]) by mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id 0B8B81956048; Tue, 10 Dec 2024 15:34:45 +0000 (UTC) From: Milan Zamazal To: libcamera-devel@lists.libcamera.org Cc: Milan Zamazal , Robert Mader , Hans de Goede , Laurent Pinchart , Kieran Bingham Subject: [PATCH v3 0/9] Software ISP support for CCM Date: Tue, 10 Dec 2024 16:34:30 +0100 Message-ID: <20241210153440.1007470-1-mzamazal@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.0 on 10.30.177.17 X-Mimecast-Spam-Score: 0 X-Mimecast-MFC-PROC-ID: xgUsz_uhPRvOiqy-1CcLpc8nRYLryXfCBz6HT01tcrE_1733844888 X-Mimecast-Originator: redhat.com 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 implements application of color correction matrices in software ISP. Support for color temperature is added to auto white balance algorithm, this is needed to obtain the right CCM. A new Ccm algorithm is added to determine the matrix. Both roughly follow what the hardware pipelines do. Lut algorithm is modified to incorporate the CCM and perform some precomputations in the form of 10 lookup tables (one per each matrix element and one for gamma). A tricky part is to support both CCM and the original (no-CCM) transformations. CCM obviously adds a significant overhead; per-frame time increases by ~45% on Debix Model A and ~85% on TI AM69 SK. This means CCM must be optional, which is determined by presence of Ccm algorithm in the tuning file. The performance critical debayering code must not include extra conditionals and must work efficiently for both the cases. The macros in debayering code are refactored and restructured for this. An added bonus is that this also removes some annoying code duplication. And some more, partially already present, templating is used to select between CCM and non-CCM processing. Performance is much influenced by the data structures used in debayering. I tried to define something reasonable and performed only basic performance testing. Suggestions for possible improvements are welcome. There is already one from Hans about avoiding using std::clamp in debayering but I don’t have a working patch for this yet. When trying to use the following imx219 color correction matrix from rpi subtree, I get quite noticeable color casts: - Ccm: ccms: - ct: 2860 ccm: [ 2.12089, -0.52461, -0.59629, -0.85342, 2.80445, -0.95103, -0.26897, -1.14788, 2.41685 ] - ct: 2960 ccm: [ 2.26962, -0.54174, -0.72789, -0.77008, 2.60271, -0.83262, -0.26036, -1.51254, 2.77289 ] - ct: 3603 ccm: [ 2.18644, -0.66148, -0.52496, -0.77828, 2.69474, -0.91645, -0.25239, -0.83059, 2.08298 ] - ct: 4650 ccm: [ 2.18174, -0.70887, -0.47287, -0.70196, 2.76426, -1.06231, -0.25157, -0.71978, 1.97135 ] - ct: 5858 ccm: [ 2.32392, -0.88421, -0.43971, -0.63821, 2.58348, -0.94527, -0.28541, -0.54112, 1.82653 ] - ct: 7580 ccm: [ 2.21175, -0.53242, -0.67933, -0.57875, 3.07922, -1.50047, -0.27709, -0.73338, 2.01048 ] One of the possible explanations could be that the software ISP AWB (used to determine the color temperature) is no way accurate and produces some (different) color casts too. But it can also be caused by some bug or misunderstanding, independent testing is welcome. Changes in v3: - Rebased on master. - AWB gains applied. - ccmEnabled docstring moved to the right patch. - Small notes about std::variant and about std::clamp added to the commit message of the last patch. Changes in v2: - Fix of the gamma table index upper boundary. - Fix of red<->blue being temporarily swapped in an intermediate patch. - Fix of CCM transformation when swapRedBlueGains_ is true. - A related minor lookup data structures rearrangement, with an unintended but welcome effect of ~10% speedup with CCM in my environment. Milan Zamazal (9): libcamera: software_isp: Determine color temperature libcamera: software_isp: Store color temperature to metadata libcamera: software_isp: lut: Remove maybe_unused on a used argument libcamera: software_isp: Use common code to store debayered pixels libcamera: software_isp: Use a macro to assign debayering methods libcamera: software_isp: Add CCM algorithm libcamera: software_isp: Add an example CCM to uncalibrated.yaml libcamera: software_isp: Track whether CCM is enabled libcamera: software_isp: Apply CCM in debayering .../internal/software_isp/debayer_params.h | 20 ++- include/libcamera/ipa/soft.mojom | 2 +- src/ipa/simple/algorithms/awb.cpp | 18 ++- src/ipa/simple/algorithms/ccm.cpp | 86 ++++++++++++ src/ipa/simple/algorithms/ccm.h | 46 ++++++ src/ipa/simple/algorithms/lut.cpp | 67 ++++++--- src/ipa/simple/algorithms/lut.h | 1 + src/ipa/simple/algorithms/meson.build | 1 + src/ipa/simple/data/uncalibrated.yaml | 7 + src/ipa/simple/ipa_context.h | 24 +++- src/ipa/simple/soft_simple.cpp | 8 +- src/libcamera/software_isp/debayer.cpp | 53 ++++++- src/libcamera/software_isp/debayer.h | 3 +- src/libcamera/software_isp/debayer_cpu.cpp | 132 ++++++++++-------- src/libcamera/software_isp/debayer_cpu.h | 31 ++-- src/libcamera/software_isp/software_isp.cpp | 11 +- 16 files changed, 400 insertions(+), 110 deletions(-) create mode 100644 src/ipa/simple/algorithms/ccm.cpp create mode 100644 src/ipa/simple/algorithms/ccm.h