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{ "id": 16118, "url": "https://patchwork.libcamera.org/api/patches/16118/?format=api", "web_url": "https://patchwork.libcamera.org/patch/16118/", "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": "<20220530142722.57618-12-tomi.valkeinen@ideasonboard.com>", "date": "2022-05-30T14:27:17", "name": "[libcamera-devel,v4,11/16] py: merge read_event() and get_ready_requests()", "commit_ref": null, "pull_url": null, "state": "accepted", "archived": false, "hash": "570a9d64247f96364e7397f9c342f3ef3083ab8d", "submitter": { "id": 109, "url": "https://patchwork.libcamera.org/api/people/109/?format=api", "name": "Tomi Valkeinen", "email": "tomi.valkeinen@ideasonboard.com" }, "delegate": null, "mbox": "https://patchwork.libcamera.org/patch/16118/mbox/", "series": [ { "id": 3149, "url": "https://patchwork.libcamera.org/api/series/3149/?format=api", "web_url": "https://patchwork.libcamera.org/project/libcamera/list/?series=3149", "date": "2022-05-30T14:27:06", "name": "More misc Python patches", "version": 4, "mbox": "https://patchwork.libcamera.org/series/3149/mbox/" } ], "comments": "https://patchwork.libcamera.org/api/patches/16118/comments/", "check": "pending", "checks": "https://patchwork.libcamera.org/api/patches/16118/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 F1E4DC3275\n\tfor <parsemail@patchwork.libcamera.org>;\n\tMon, 30 May 2022 14:27:53 +0000 (UTC)", "from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id 951AB6564C;\n\tMon, 30 May 2022 16:27:53 +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 D93F465641\n\tfor <libcamera-devel@lists.libcamera.org>;\n\tMon, 30 May 2022 16:27:44 +0200 (CEST)", "from deskari.lan (91-156-85-209.elisa-laajakaista.fi\n\t[91.156.85.209])\n\tby perceval.ideasonboard.com (Postfix) with ESMTPSA id 511E7145B;\n\tMon, 30 May 2022 16:27:44 +0200 (CEST)" ], "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=\"gNfQ1dDu\"; dkim-atps=neutral", "To": "libcamera-devel@lists.libcamera.org,\n\tDavid Plowman <david.plowman@raspberrypi.com>,\n\tKieran Bingham <kieran.bingham@ideasonboard.com>,\n\tLaurent Pinchart <laurent.pinchart@ideasonboard.com>,\n\tJacopo Mondi <jacopo@jmondi.org>", "Date": "Mon, 30 May 2022 17:27:17 +0300", "Message-Id": "<20220530142722.57618-12-tomi.valkeinen@ideasonboard.com>", "X-Mailer": "git-send-email 2.34.1", "In-Reply-To": "<20220530142722.57618-1-tomi.valkeinen@ideasonboard.com>", "References": "<20220530142722.57618-1-tomi.valkeinen@ideasonboard.com>", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "Subject": "[libcamera-devel] [PATCH v4 11/16] py: merge read_event() and\n\tget_ready_requests()", "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>", "From": "Tomi Valkeinen via libcamera-devel\n\t<libcamera-devel@lists.libcamera.org>", "Reply-To": "Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>", "Errors-To": "libcamera-devel-bounces@lists.libcamera.org", "Sender": "\"libcamera-devel\" <libcamera-devel-bounces@lists.libcamera.org>" }, "content": "We always call CameraManager.read_event() and\nCameraManager.get_ready_requests(), so to simplify the use merge the\nread_event() into the get_ready_requests().\n\nThis has the side effect that get_ready_requests() will now block if\nthere is no event ready. If we ever need to call get_ready_requests() in\na polling manner we will need a new function which behaves differently.\n\nHowever, afaics the only sensible way to manage the event loop is to use\nselect/poll on the eventfd and then call get_ready_requests() once,\nwhich is the use case what the current merged function supports.\n\nSigned-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>\n---\n src/py/cam/cam.py | 2 --\n src/py/libcamera/py_main.cpp | 7 ++-----\n test/py/unittests.py | 4 ----\n 3 files changed, 2 insertions(+), 11 deletions(-)", "diff": "diff --git a/src/py/cam/cam.py b/src/py/cam/cam.py\nindex bf8529d9..2ae89fa8 100755\n--- a/src/py/cam/cam.py\n+++ b/src/py/cam/cam.py\n@@ -243,8 +243,6 @@ class CaptureState:\n # Called from renderer when there is a libcamera event\n def event_handler(self):\n try:\n- self.cm.read_event()\n-\n reqs = self.cm.get_ready_requests()\n \n for req in reqs:\ndiff --git a/src/py/libcamera/py_main.cpp b/src/py/libcamera/py_main.cpp\nindex fcf009f0..505cc3dc 100644\n--- a/src/py/libcamera/py_main.cpp\n+++ b/src/py/libcamera/py_main.cpp\n@@ -213,15 +213,12 @@ PYBIND11_MODULE(_libcamera, m)\n \t\t\treturn gEventfd;\n \t\t})\n \n-\t\t.def(\"read_event\", [](CameraManager &) {\n+\t\t.def(\"get_ready_requests\", [](CameraManager &) {\n \t\t\tuint8_t buf[8];\n \n-\t\t\tint ret = read(gEventfd, buf, 8);\n-\t\t\tif (ret != 8)\n+\t\t\tif (read(gEventfd, buf, 8) != 8)\n \t\t\t\tthrow std::system_error(errno, std::generic_category());\n-\t\t})\n \n-\t\t.def(\"get_ready_requests\", [](CameraManager &) {\n \t\t\tstd::vector<Request *> v;\n \n \t\t\t{\ndiff --git a/test/py/unittests.py b/test/py/unittests.py\nindex 33b35a0a..9adc4337 100755\n--- a/test/py/unittests.py\n+++ b/test/py/unittests.py\n@@ -210,8 +210,6 @@ class SimpleCaptureMethods(CameraTesterBase):\n reqs = []\n \n while True:\n- cm.read_event()\n-\n ready_reqs = cm.get_ready_requests()\n \n reqs += ready_reqs\n@@ -283,8 +281,6 @@ class SimpleCaptureMethods(CameraTesterBase):\n while running:\n events = sel.select()\n for key, _ in events:\n- cm.read_event()\n-\n ready_reqs = cm.get_ready_requests()\n \n reqs += ready_reqs\n", "prefixes": [ "libcamera-devel", "v4", "11/16" ] }