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{ "id": 13993, "url": "https://patchwork.libcamera.org/api/patches/13993/?format=api", "web_url": "https://patchwork.libcamera.org/patch/13993/", "project": { "id": 1, "url": "https://patchwork.libcamera.org/api/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": "<20210930093715.73293-12-jeanmichel.hautbois@ideasonboard.com>", "date": "2021-09-30T09:37:14", "name": "[libcamera-devel,v2,11/12] ipa: ipu3: agc: Rewrite and simplify the brightness loop", "commit_ref": null, "pull_url": null, "state": "accepted", "archived": false, "hash": "db454bfb5c4c4d990a87505157f94eefa65192bf", "submitter": { "id": 75, "url": "https://patchwork.libcamera.org/api/people/75/?format=api", "name": "Jean-Michel Hautbois", "email": "jeanmichel.hautbois@ideasonboard.com" }, "delegate": null, "mbox": "https://patchwork.libcamera.org/patch/13993/mbox/", "series": [ { "id": 2587, "url": "https://patchwork.libcamera.org/api/series/2587/?format=api", "web_url": "https://patchwork.libcamera.org/project/libcamera/list/?series=2587", "date": "2021-09-30T09:37:03", "name": "Improve ImgU statistics usage", "version": 2, "mbox": "https://patchwork.libcamera.org/series/2587/mbox/" } ], "comments": "https://patchwork.libcamera.org/api/patches/13993/comments/", "check": "pending", "checks": "https://patchwork.libcamera.org/api/patches/13993/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 675EBBDC71\n\tfor <parsemail@patchwork.libcamera.org>;\n\tThu, 30 Sep 2021 09:37:34 +0000 (UTC)", "from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id 29161691C3;\n\tThu, 30 Sep 2021 11:37:34 +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 0C97A691B9\n\tfor <libcamera-devel@lists.libcamera.org>;\n\tThu, 30 Sep 2021 11:37:22 +0200 (CEST)", "from tatooine.ideasonboard.com (unknown\n\t[IPv6:2a01:e0a:169:7140:bab4:22c5:662d:e478])\n\tby perceval.ideasonboard.com (Postfix) with ESMTPSA id B2F6018BF;\n\tThu, 30 Sep 2021 11:37:21 +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=\"dC7MMKU8\"; dkim-atps=neutral", "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com;\n\ts=mail; t=1632994641;\n\tbh=6XvCGCc2wwMTxdrkPYkCjYBi+jhlZP0I0O+8681ZiIU=;\n\th=From:To:Cc:Subject:Date:In-Reply-To:References:From;\n\tb=dC7MMKU8ILEVHEDuidndyyPzVKOqmxB3Kvr5ejp4w25+M8MPYFqD3JvxsW/Y1FLVN\n\tOyMSEgI+DDQ7mhlEKmLWUHRr3aqLUl2daNz5XP6j2lve4HBLkxugWgRwYHFGBn8cXn\n\t4cjPurB8qwq2aGIwjWAavy66Wt5rqYchE1ksWkOA=", "From": "Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com>", "To": "libcamera-devel@lists.libcamera.org", "Date": "Thu, 30 Sep 2021 11:37:14 +0200", "Message-Id": "<20210930093715.73293-12-jeanmichel.hautbois@ideasonboard.com>", "X-Mailer": "git-send-email 2.30.2", "In-Reply-To": "<20210930093715.73293-1-jeanmichel.hautbois@ideasonboard.com>", "References": "<20210930093715.73293-1-jeanmichel.hautbois@ideasonboard.com>", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "Subject": "[libcamera-devel] [PATCH v2 11/12] ipa: ipu3: agc: Rewrite and\n\tsimplify the brightness loop", "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": "Now that we know how the AWB statistics are formatted, use a simplified\nloop in processBrightness() to parse the green values and get the\nhistogram.\n\nSigned-off-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com>\n---\n src/ipa/ipu3/algorithms/agc.cpp | 55 ++++++++++++---------------------\n src/ipa/ipu3/algorithms/agc.h | 2 ++\n 2 files changed, 22 insertions(+), 35 deletions(-)", "diff": "diff --git a/src/ipa/ipu3/algorithms/agc.cpp b/src/ipa/ipu3/algorithms/agc.cpp\nindex 5ff50f4a..46e01fc4 100644\n--- a/src/ipa/ipu3/algorithms/agc.cpp\n+++ b/src/ipa/ipu3/algorithms/agc.cpp\n@@ -6,6 +6,7 @@\n */\n \n #include \"agc.h\"\n+#include \"awb.h\"\n \n #include <algorithm>\n #include <chrono>\n@@ -47,9 +48,6 @@ static constexpr uint32_t kMaxExposure = 1976;\n static constexpr uint32_t knumHistogramBins = 256;\n static constexpr double kEvGainTarget = 0.5;\n \n-/* A cell is 8 bytes and contains averages for RGB values and saturation ratio */\n-static constexpr uint8_t kCellSize = 8;\n-\n Agc::Agc()\n \t: frameCount_(0), lastFrame_(0), iqMean_(0.0), lineDuration_(0s),\n \t maxExposureTime_(0s), prevExposure_(0s), prevExposureNoDg_(0s),\n@@ -57,9 +55,10 @@ Agc::Agc()\n {\n }\n \n-int Agc::configure([[maybe_unused]] IPAContext &context,\n-\t\t const IPAConfigInfo &configInfo)\n+int Agc::configure(IPAContext &context, const IPAConfigInfo &configInfo)\n {\n+\tstride_ = context.configuration.grid.stride;\n+\n \tlineDuration_ = configInfo.sensorInfo.lineLength * 1.0s\n \t\t / configInfo.sensorInfo.pixelRate;\n \tmaxExposureTime_ = kMaxExposure * lineDuration_;\n@@ -70,37 +69,23 @@ int Agc::configure([[maybe_unused]] IPAContext &context,\n void Agc::processBrightness(const ipu3_uapi_stats_3a *stats,\n \t\t\t const ipu3_uapi_grid_config &grid)\n {\n-\tconst struct ipu3_uapi_grid_config statsAeGrid = stats->stats_4a_config.awb_config.grid;\n-\tRectangle aeRegion = { statsAeGrid.x_start,\n-\t\t\t statsAeGrid.y_start,\n-\t\t\t static_cast<unsigned int>(statsAeGrid.x_end - statsAeGrid.x_start) + 1,\n-\t\t\t static_cast<unsigned int>(statsAeGrid.y_end - statsAeGrid.y_start) + 1 };\n-\tPoint topleft = aeRegion.topLeft();\n-\tint topleftX = topleft.x >> grid.block_width_log2;\n-\tint topleftY = topleft.y >> grid.block_height_log2;\n-\n-\t/* Align to the grid cell width and height */\n-\tuint32_t startX = topleftX << grid.block_width_log2;\n-\tuint32_t startY = topleftY * grid.width << grid.block_width_log2;\n-\tuint32_t endX = (startX + (aeRegion.size().width >> grid.block_width_log2)) << grid.block_width_log2;\n-\tuint32_t i, j;\n-\tuint32_t count = 0;\n-\n \tuint32_t hist[knumHistogramBins] = { 0 };\n-\tfor (j = topleftY;\n-\t j < topleftY + (aeRegion.size().height >> grid.block_height_log2);\n-\t j++) {\n-\t\tfor (i = startX + startY; i < endX + startY; i += kCellSize) {\n-\t\t\t/*\n-\t\t\t * The grid width (and maybe height) is not reliable.\n-\t\t\t * We observed a bit shift which makes the value 160 to be 32 in the stats grid.\n-\t\t\t * Use the one passed at init time.\n-\t\t\t */\n-\t\t\tif (stats->awb_raw_buffer.meta_data[i + 4 + j * grid.width] == 0) {\n-\t\t\t\tuint8_t Gr = stats->awb_raw_buffer.meta_data[i + 0 + j * grid.width];\n-\t\t\t\tuint8_t Gb = stats->awb_raw_buffer.meta_data[i + 3 + j * grid.width];\n-\t\t\t\thist[(Gr + Gb) / 2]++;\n-\t\t\t\tcount++;\n+\n+\tfor (unsigned int cellY = 0; cellY < grid.height; cellY++) {\n+\t\tfor (unsigned int cellX = 0; cellX < grid.width; cellX++) {\n+\t\t\tuint32_t cellPosition = cellY * stride_ + cellX\n+\t\t\t\t\t * sizeof(Ipu3AwbCell);\n+\n+\t\t\t/* Cast the initial IPU3 structure to simplify the reading */\n+\t\t\tconst Ipu3AwbCell *cell =\n+\t\t\t\treinterpret_cast<const Ipu3AwbCell *>(\n+\t\t\t\t\t&stats->awb_raw_buffer.meta_data[cellPosition]\n+\t\t\t\t);\n+\n+\t\t\tif (cell->satRatio == 0) {\n+\t\t\t\tuint8_t gr = cell->greenRedAvg;\n+\t\t\t\tuint8_t gb = cell->greenBlueAvg;\n+\t\t\t\thist[(gr + gb) / 2]++;\n \t\t\t}\n \t\t}\n \t}\ndiff --git a/src/ipa/ipu3/algorithms/agc.h b/src/ipa/ipu3/algorithms/agc.h\nindex e36797d3..64b71c65 100644\n--- a/src/ipa/ipu3/algorithms/agc.h\n+++ b/src/ipa/ipu3/algorithms/agc.h\n@@ -50,6 +50,8 @@ private:\n \tDuration prevExposureNoDg_;\n \tDuration currentExposure_;\n \tDuration currentExposureNoDg_;\n+\n+\tuint32_t stride_;\n };\n \n } /* namespace ipa::ipu3::algorithms */\n", "prefixes": [ "libcamera-devel", "v2", "11/12" ] }