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{ "id": 11756, "url": "https://patchwork.libcamera.org/api/patches/11756/?format=api", "web_url": "https://patchwork.libcamera.org/patch/11756/", "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": "<20210329022604.110201-3-hiroh@chromium.org>", "date": "2021-03-29T02:26:04", "name": "[libcamera-devel,RFC,2/2] libcamera: PipelineHandler: Retry queuing a capture request", "commit_ref": null, "pull_url": null, "state": "changes-requested", "archived": false, "hash": "079c41b1cede6f94eb5b0943b4f8552de82768e4", "submitter": { "id": 63, "url": "https://patchwork.libcamera.org/api/people/63/?format=api", "name": "Hirokazu Honda", "email": "hiroh@chromium.org" }, "delegate": null, "mbox": "https://patchwork.libcamera.org/patch/11756/mbox/", "series": [ { "id": 1857, "url": "https://patchwork.libcamera.org/api/series/1857/?format=api", "web_url": "https://patchwork.libcamera.org/project/libcamera/list/?series=1857", "date": "2021-03-29T02:26:02", "name": "Enable handling a number of capture requests", "version": 1, "mbox": "https://patchwork.libcamera.org/series/1857/mbox/" } ], "comments": "https://patchwork.libcamera.org/api/patches/11756/comments/", "check": "pending", "checks": "https://patchwork.libcamera.org/api/patches/11756/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 5137CC32EA\n\tfor <parsemail@patchwork.libcamera.org>;\n\tMon, 29 Mar 2021 02:26:18 +0000 (UTC)", "from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id A2BB668783;\n\tMon, 29 Mar 2021 04:26:17 +0200 (CEST)", "from mail-pf1-x429.google.com (mail-pf1-x429.google.com\n\t[IPv6:2607:f8b0:4864:20::429])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id DBCCC6878A\n\tfor <libcamera-devel@lists.libcamera.org>;\n\tMon, 29 Mar 2021 04:26:15 +0200 (CEST)", "by mail-pf1-x429.google.com with SMTP id q5so8892261pfh.10\n\tfor <libcamera-devel@lists.libcamera.org>;\n\tSun, 28 Mar 2021 19:26:15 -0700 (PDT)", "from hiroh2.tok.corp.google.com\n\t([2401:fa00:8f:2:1db7:ae60:9288:b906])\n\tby smtp.gmail.com with ESMTPSA id\n\ta26sm10537879pff.149.2021.03.28.19.26.13\n\t(version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256);\n\tSun, 28 Mar 2021 19:26:13 -0700 (PDT)" ], "Authentication-Results": "lancelot.ideasonboard.com;\n\tdkim=fail reason=\"signature verification failed\" (1024-bit key;\n\tunprotected) header.d=chromium.org header.i=@chromium.org\n\theader.b=\"DIRwffu2\"; 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\n\tSun, 28 Mar 2021 19:26:14 -0700 (PDT)", "From": "Hirokazu Honda <hiroh@chromium.org>", "To": "libcamera-devel@lists.libcamera.org", "Date": "Mon, 29 Mar 2021 11:26:04 +0900", "Message-Id": "<20210329022604.110201-3-hiroh@chromium.org>", "X-Mailer": "git-send-email 2.31.0.291.g576ba9dcdaf-goog", "In-Reply-To": "<20210329022604.110201-1-hiroh@chromium.org>", "References": "<20210329022604.110201-1-hiroh@chromium.org>", "MIME-Version": "1.0", "Subject": "[libcamera-devel] [RFC PATCH 2/2] libcamera: PipelineHandler: Retry\n\tqueuing a capture request", "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>", "Content-Type": "text/plain; charset=\"us-ascii\"", "Content-Transfer-Encoding": "7bit", "Errors-To": "libcamera-devel-bounces@lists.libcamera.org", "Sender": "\"libcamera-devel\" <libcamera-devel-bounces@lists.libcamera.org>" }, "content": "PipelineHandler::queueRequestDevice() fails due to a buffer\nshortage. We should retry queuing a capture request later in the\ncase.\n\nSigned-off-by: Hirokazu Honda <hiroh@chromium.org>\n---\n include/libcamera/internal/pipeline_handler.h | 2 +\n src/libcamera/pipeline_handler.cpp | 57 +++++++++++++++++--\n 2 files changed, 54 insertions(+), 5 deletions(-)", "diff": "diff --git a/include/libcamera/internal/pipeline_handler.h b/include/libcamera/internal/pipeline_handler.h\nindex 763da63e..e6f771a6 100644\n--- a/include/libcamera/internal/pipeline_handler.h\n+++ b/include/libcamera/internal/pipeline_handler.h\n@@ -44,6 +44,7 @@ public:\n \tvirtual ~CameraData() = default;\n \n \tPipelineHandler *pipe_;\n+\tstd::queue<Request *> waitedRequests_;\n \tstd::deque<Request *> queuedRequests_;\n \tControlInfoMap controlInfo_;\n \tControlList properties_;\n@@ -99,6 +100,7 @@ protected:\n \tCameraManager *manager_;\n \n private:\n+\tvoid tryQueueRequests(CameraData *data);\n \tvoid mediaDeviceDisconnected(MediaDevice *media);\n \tvirtual void disconnect();\n \ndiff --git a/src/libcamera/pipeline_handler.cpp b/src/libcamera/pipeline_handler.cpp\nindex 4cb58084..18952a1b 100644\n--- a/src/libcamera/pipeline_handler.cpp\n+++ b/src/libcamera/pipeline_handler.cpp\n@@ -70,6 +70,16 @@ LOG_DEFINE_CATEGORY(Pipeline)\n * and remains valid until the instance is destroyed.\n */\n \n+/**\n+ * \\var CameraData::waitedRequests_\n+ * \\brief The queue of not yet queued request\n+ *\n+ * The queue of not yet queued request is used to track requests that are not\n+ * queued in order to retry queueing them when a pipeline is ready to accept.\n+ *\n+ * \\sa PipelineHandler::queueRequest(), PipelineHandler::tryQueueRequests().\n+ */\n+\n /**\n * \\var CameraData::queuedRequests_\n * \\brief The queue of queued and not yet completed request\n@@ -378,12 +388,44 @@ void PipelineHandler::queueRequest(Request *request)\n \n \tCamera *camera = request->camera_;\n \tCameraData *data = cameraData(camera);\n-\tdata->queuedRequests_.push_back(request);\n+\tdata->waitedRequests_.push(request);\n+\n+\ttryQueueRequests(data);\n+}\n+\n+/**\n+ * \\fn PipelineHandler::tryQueueRequests()\n+ * \\brief Queue requests that are not yet queued.\n+ * \\param[in] data The camera data whose waited requests are tried to queue.\n+ *\n+ * This tries to queue as many requests as possible in order of the\n+ * waitedRequests_ in data. If queuing fails due to a buffer shortage, this\n+ * method stops and the next call of this method starts from the request that\n+ * fails in the previous call. On any other failures, the request is marked as\n+ * complete and proceed the successive requests.\n+ *\n+ * \\context This function shall be called from the CameraManager thread.\n+ */\n+void PipelineHandler::tryQueueRequests(CameraData *data)\n+{\n+\twhile (!data->waitedRequests_.empty()) {\n+\t\tRequest *request = data->waitedRequests_.front();\n+\t\tCamera *camera = request->camera_;\n+\t\tASSERT(data == cameraData(camera));\n+\n+\t\tdata->queuedRequests_.push_back(request);\n+\t\tint ret = queueRequestDevice(camera, request);\n+\t\tif (ret == -ENOBUFS || ret == -ENOMEM) {\n+\t\t\tdata->queuedRequests_.pop_back();\n+\t\t\tbreak;\n+\t\t}\n \n-\tint ret = queueRequestDevice(camera, request);\n-\tif (ret) {\n-\t\trequest->result_ = ret;\n-\t\tcompleteRequest(request);\n+\t\tdata->waitedRequests_.pop();\n+\t\tif (ret) {\n+\t\t\trequest->result_ = ret;\n+\t\t\tcompleteRequest(request);\n+\t\t\tbreak;\n+\t\t}\n \t}\n }\n \n@@ -440,6 +482,9 @@ bool PipelineHandler::completeBuffer(Request *request, FrameBuffer *buffer)\n * submission order, the pipeline handler may call it on any complete request\n * without any ordering constraint.\n *\n+ * There might be requests that are waiting to be queued, this triggers\n+ * tryQueueRequests().\n+ *\n * \\context This function shall be called from the CameraManager thread.\n */\n void PipelineHandler::completeRequest(Request *request)\n@@ -459,6 +504,8 @@ void PipelineHandler::completeRequest(Request *request)\n \t\tdata->queuedRequests_.pop_front();\n \t\tcamera->requestComplete(req);\n \t}\n+\n+\ttryQueueRequests(data);\n }\n \n /**\n", "prefixes": [ "libcamera-devel", "RFC", "2/2" ] }