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GET /api/1.1/patches/14341/?format=api
{ "id": 14341, "url": "https://patchwork.libcamera.org/api/1.1/patches/14341/?format=api", "web_url": "https://patchwork.libcamera.org/patch/14341/", "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": "<20211026112340.110169-9-jeanmichel.hautbois@ideasonboard.com>", "date": "2021-10-26T11:23:29", "name": "[libcamera-devel,v5,08/19] ipa: ipu3: tonemapping: Generate the LUT only on gamma change", "commit_ref": "acbad32b2e419558a55c7a2a26c19397d7c28191", "pull_url": null, "state": "accepted", "archived": false, "hash": "42e62ea816b3730008e4c236c451b2ed3ae56f3c", "submitter": { "id": 75, "url": "https://patchwork.libcamera.org/api/1.1/people/75/?format=api", "name": "Jean-Michel Hautbois", "email": "jeanmichel.hautbois@ideasonboard.com" }, "delegate": null, "mbox": "https://patchwork.libcamera.org/patch/14341/mbox/", "series": [ { "id": 2658, "url": "https://patchwork.libcamera.org/api/1.1/series/2658/?format=api", "web_url": "https://patchwork.libcamera.org/project/libcamera/list/?series=2658", "date": "2021-10-26T11:23:21", "name": "Document IPU3 IPA", "version": 5, "mbox": "https://patchwork.libcamera.org/series/2658/mbox/" } ], "comments": "https://patchwork.libcamera.org/api/patches/14341/comments/", "check": "pending", "checks": "https://patchwork.libcamera.org/api/patches/14341/checks/", "tags": {}, "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 E82ADBF415\n\tfor <parsemail@patchwork.libcamera.org>;\n\tTue, 26 Oct 2021 11:23:59 +0000 (UTC)", "from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id 4B3A264895;\n\tTue, 26 Oct 2021 13:23:59 +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 3A72764884\n\tfor <libcamera-devel@lists.libcamera.org>;\n\tTue, 26 Oct 2021 13:23:46 +0200 (CEST)", "from tatooine.ideasonboard.com (unknown\n\t[IPv6:2a01:e0a:169:7140:dce3:eb54:18d7:6f3d])\n\tby perceval.ideasonboard.com (Postfix) with ESMTPSA id D611C3F0;\n\tTue, 26 Oct 2021 13:23:45 +0200 (CEST)" ], "Authentication-Results": "lancelot.ideasonboard.com;\n\tdkim=fail reason=\"signature verification failed\" (1024-bit key;\n\tunprotected) header.d=ideasonboard.com header.i=@ideasonboard.com\n\theader.b=\"P/LuKH3D\"; dkim-atps=neutral", "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com;\n\ts=mail; t=1635247425;\n\tbh=HPMVdf68yWVnoSXsmho/S+LzQSwSso72VFKAkZXohZM=;\n\th=From:To:Cc:Subject:Date:In-Reply-To:References:From;\n\tb=P/LuKH3DuDLM6wPyi7e6/eQRxy4tbe0DReCP2VjDdLelwZo1/G6WAZLB8OW9/TNZw\n\t5AzZWtIBp0exAG+1ffb+tY7+q7FhXabssHNE35UiInLX+ms4vaRMFFgxXo9pfM30oJ\n\tx67TN2dj7zKNe/QS9KZ0LbkCaArkuGS+Lea6fHrI=", "From": "Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com>", "To": "libcamera-devel@lists.libcamera.org", "Date": "Tue, 26 Oct 2021 13:23:29 +0200", "Message-Id": "<20211026112340.110169-9-jeanmichel.hautbois@ideasonboard.com>", "X-Mailer": "git-send-email 2.32.0", "In-Reply-To": "<20211026112340.110169-1-jeanmichel.hautbois@ideasonboard.com>", "References": "<20211026112340.110169-1-jeanmichel.hautbois@ideasonboard.com>", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "Subject": "[libcamera-devel] [PATCH v5 08/19] ipa: ipu3: tonemapping: Generate\n\tthe LUT only on gamma change", "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": "The tone mapping algorithm calculates the gamma curve for every frame,\nregardless of whether the gamma value has changed or not. This issue is\nexasperated as we currently hardcode the gamma to a single value.\n\nOptimise the implementation to only recalculate the look up table when\nthe gamma setting is changed, and store the gamma setting of the LUT\ncurve as part of the IPA context.\n\nSigned-off-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com>\nSigned-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>\nReviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>\nReviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>\n---\n src/ipa/ipu3/algorithms/tone_mapping.cpp | 5 +++++\n src/ipa/ipu3/ipa_context.h | 1 +\n src/ipa/ipu3/ipu3.cpp | 3 +++\n 3 files changed, 9 insertions(+)", "diff": "diff --git a/src/ipa/ipu3/algorithms/tone_mapping.cpp b/src/ipa/ipu3/algorithms/tone_mapping.cpp\nindex 3af96261..40337f9d 100644\n--- a/src/ipa/ipu3/algorithms/tone_mapping.cpp\n+++ b/src/ipa/ipu3/algorithms/tone_mapping.cpp\n@@ -43,6 +43,9 @@ void ToneMapping::process([[maybe_unused]] IPAContext &context,\n \t */\n \tgamma_ = 1.1;\n \n+\tif (context.frameContext.toneMapping.gamma == gamma_)\n+\t\treturn;\n+\n \tstruct ipu3_uapi_gamma_corr_lut &lut =\n \t\tcontext.frameContext.toneMapping.gammaCorrection;\n \n@@ -53,6 +56,8 @@ void ToneMapping::process([[maybe_unused]] IPAContext &context,\n \t\t/* The output value is expressed on 13 bits. */\n \t\tlut.lut[i] = gamma * 8191;\n \t}\n+\n+\tcontext.frameContext.toneMapping.gamma = gamma_;\n }\n \n } /* namespace ipa::ipu3::algorithms */\ndiff --git a/src/ipa/ipu3/ipa_context.h b/src/ipa/ipu3/ipa_context.h\nindex 847c03fe..e14bb561 100644\n--- a/src/ipa/ipu3/ipa_context.h\n+++ b/src/ipa/ipu3/ipa_context.h\n@@ -48,6 +48,7 @@ struct IPAFrameContext {\n \t} awb;\n \n \tstruct {\n+\t\tdouble gamma;\n \t\tstruct ipu3_uapi_gamma_corr_lut gammaCorrection;\n \t} toneMapping;\n };\ndiff --git a/src/ipa/ipu3/ipu3.cpp b/src/ipa/ipu3/ipu3.cpp\nindex bcaa34da..4c0fff00 100644\n--- a/src/ipa/ipu3/ipu3.cpp\n+++ b/src/ipa/ipu3/ipu3.cpp\n@@ -151,6 +151,9 @@\n * \\struct IPAFrameContext::toneMapping\n * \\brief Context for ToneMapping and Gamma control\n *\n+ * \\var IPAFrameContext::toneMapping::gamma\n+ * \\brief Gamma value for the LUT\n+ *\n * \\var IPAFrameContext::toneMapping::gammaCorrection\n * \\brief Per-pixel tone mapping implemented as a LUT\n *\n", "prefixes": [ "libcamera-devel", "v5", "08/19" ] }