{"id":15554,"url":"https://patchwork.libcamera.org/api/1.1/patches/15554/?format=json","web_url":"https://patchwork.libcamera.org/patch/15554/","project":{"id":1,"url":"https://patchwork.libcamera.org/api/1.1/projects/1/?format=json","name":"libcamera","link_name":"libcamera","list_id":"libcamera_core","list_email":"libcamera-devel@lists.libcamera.org","web_url":"","scm_url":"","webscm_url":""},"msgid":"<20220325092555.1799897-5-kieran.bingham@ideasonboard.com>","date":"2022-03-25T09:25:54","name":"[libcamera-devel,v3,4/5] ipa: ipu3: af: Use Span for y_table_item_t","commit_ref":null,"pull_url":null,"state":"accepted","archived":false,"hash":"5ecb9efa34101c29b4e0ffbd956fca673dd8fd46","submitter":{"id":4,"url":"https://patchwork.libcamera.org/api/1.1/people/4/?format=json","name":"Kieran Bingham","email":"kieran.bingham@ideasonboard.com"},"delegate":null,"mbox":"https://patchwork.libcamera.org/patch/15554/mbox/","series":[{"id":3000,"url":"https://patchwork.libcamera.org/api/1.1/series/3000/?format=json","web_url":"https://patchwork.libcamera.org/project/libcamera/list/?series=3000","date":"2022-03-25T09:25:50","name":"ipa: ipu3: af: Small improvements","version":3,"mbox":"https://patchwork.libcamera.org/series/3000/mbox/"}],"comments":"https://patchwork.libcamera.org/api/patches/15554/comments/","check":"pending","checks":"https://patchwork.libcamera.org/api/patches/15554/checks/","tags":{},"headers":{"Return-Path":"","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 79423C3265\n\tfor ;\n\tFri, 25 Mar 2022 09:26:06 +0000 (UTC)","from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id 4F200604EA;\n\tFri, 25 Mar 2022 10:26:05 +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 8B7EB604D5\n\tfor ;\n\tFri, 25 Mar 2022 10:26:01 +0100 (CET)","from Monstersaurus.ksquared.org.uk.beta.tailscale.net\n\t(cpc89244-aztw30-2-0-cust3082.18-1.cable.virginm.net [86.31.172.11])\n\tby perceval.ideasonboard.com (Postfix) with ESMTPSA id 2C82AE15;\n\tFri, 25 Mar 2022 10:26:01 +0100 (CET)"],"DKIM-Signature":["v=1; 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dkim=pass (1024-bit key; \n\tunprotected) header.d=ideasonboard.com\n\theader.i=@ideasonboard.com\n\theader.b=\"G+Y8aF16\"; dkim-atps=neutral","To":"libcamera devel ,\n\tKate Hsuan ,\n\tJean-Michel Hautbois ","Date":"Fri, 25 Mar 2022 09:25:54 +0000","Message-Id":"<20220325092555.1799897-5-kieran.bingham@ideasonboard.com>","X-Mailer":"git-send-email 2.32.0","In-Reply-To":"<20220325092555.1799897-1-kieran.bingham@ideasonboard.com>","References":"<20220325092555.1799897-1-kieran.bingham@ideasonboard.com>","MIME-Version":"1.0","Content-Transfer-Encoding":"8bit","Subject":"[libcamera-devel] [PATCH v3 4/5] ipa: ipu3: af: Use Span for\n\ty_table_item_t","X-BeenThere":"libcamera-devel@lists.libcamera.org","X-Mailman-Version":"2.1.29","Precedence":"list","List-Id":"","List-Unsubscribe":",\n\t","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n\t","From":"Kieran Bingham via libcamera-devel\n\t","Reply-To":"Kieran Bingham ","Errors-To":"libcamera-devel-bounces@lists.libcamera.org","Sender":"\"libcamera-devel\" "},"content":"Convert the y_table_item_t to a Span and use that for iteration when\nestimating variance of the table.\n\nSigned-off-by: Kieran Bingham \nReviewed-by: Laurent Pinchart \n\n---\nv3:\n - Remove parentheses and casting in afEstimateVariance\n\n src/ipa/ipu3/algorithms/af.cpp | 34 +++++++++++++++++-----------------\n src/ipa/ipu3/algorithms/af.h | 4 ++--\n 2 files changed, 19 insertions(+), 19 deletions(-)","diff":"diff --git a/src/ipa/ipu3/algorithms/af.cpp b/src/ipa/ipu3/algorithms/af.cpp\nindex 6893a15fdc07..c0f2d34368cb 100644\n--- a/src/ipa/ipu3/algorithms/af.cpp\n+++ b/src/ipa/ipu3/algorithms/af.cpp\n@@ -335,29 +335,29 @@ void Af::afIgnoreFrameReset()\n *\n * \\return The variance of the values in the data set \\a y_item selected by \\a isY1\n */\n-double Af::afEstimateVariance(const y_table_item_t *y_item, uint32_t len,\n-\t\t\t bool isY1)\n+double Af::afEstimateVariance(Span y_items, bool isY1)\n {\n-\tuint32_t z = 0;\n \tuint32_t total = 0;\n \tdouble mean;\n \tdouble var_sum = 0;\n \n-\tfor (z = 0; z < len; z++) {\n+\tfor (auto y : y_items) {\n \t\tif (isY1)\n-\t\t\ttotal += y_item[z].y1_avg;\n+\t\t\ttotal += y.y1_avg;\n \t\telse\n-\t\t\ttotal += y_item[z].y2_avg;\n+\t\t\ttotal += y.y2_avg;\n \t}\n-\tmean = total / len;\n-\tfor (z = 0; z < len; z++) {\n+\n+\tmean = total / y_items.size();\n+\n+\tfor (auto y : y_items) {\n \t\tif (isY1)\n-\t\t\tvar_sum += pow((y_item[z].y1_avg - mean), 2);\n+\t\t\tvar_sum += pow(y.y1_avg - mean, 2);\n \t\telse\n-\t\t\tvar_sum += pow((y_item[z].y2_avg - mean), 2);\n+\t\t\tvar_sum += pow(y.y2_avg - mean, 2);\n \t}\n \n-\treturn var_sum / static_cast(len);\n+\treturn var_sum / y_items.size();\n }\n \n /**\n@@ -405,21 +405,21 @@ bool Af::afIsOutOfFocus(IPAContext context)\n */\n void Af::process(IPAContext &context, const ipu3_uapi_stats_3a *stats)\n {\n-\tconst y_table_item_t *y_item = reinterpret_cast(&stats->af_raw_buffer.y_table);\n-\tuint32_t afRawBufferLen;\n-\n \t/* Evaluate the AF buffer length */\n-\tafRawBufferLen = context.configuration.af.afGrid.width *\n-\t\t\t context.configuration.af.afGrid.height;\n+\tuint32_t afRawBufferLen = context.configuration.af.afGrid.width *\n+\t\t\t\t context.configuration.af.afGrid.height;\n \n \tASSERT(afRawBufferLen < IPU3_UAPI_AF_Y_TABLE_MAX_SIZE);\n \n+\tSpan y_items(reinterpret_cast(&stats->af_raw_buffer.y_table),\n+\t\t\t\t\t afRawBufferLen);\n+\n \t/*\n \t * Calculate the mean and the variance of AF statistics for a given grid.\n \t * For coarse: y1 are used.\n \t * For fine: y2 results are used.\n \t */\n-\tcurrentVariance_ = afEstimateVariance(y_item, afRawBufferLen, !coarseCompleted_);\n+\tcurrentVariance_ = afEstimateVariance(y_items, !coarseCompleted_);\n \n \tif (!context.frameContext.af.stable) {\n \t\tafCoarseScan(context);\ndiff --git a/src/ipa/ipu3/algorithms/af.h b/src/ipa/ipu3/algorithms/af.h\nindex 3b5758e868ea..b85cf94163ff 100644\n--- a/src/ipa/ipu3/algorithms/af.h\n+++ b/src/ipa/ipu3/algorithms/af.h\n@@ -41,8 +41,8 @@ private:\n \tvoid afReset(IPAContext &context);\n \tbool afNeedIgnoreFrame();\n \tvoid afIgnoreFrameReset();\n-\tdouble afEstimateVariance(const y_table_item_t *y_item, uint32_t len,\n-\t\t\t\t bool isY1);\n+\tdouble afEstimateVariance(Span y_items, bool isY1);\n+\n \tbool afIsOutOfFocus(IPAContext context);\n \n \t/* VCM step configuration. It is the current setting of the VCM step. */\n","prefixes":["libcamera-devel","v3","4/5"]}