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{ "id": 16015, "url": "https://patchwork.libcamera.org/api/1.1/patches/16015/?format=api", "web_url": "https://patchwork.libcamera.org/patch/16015/", "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": "<20220524114610.41848-11-tomi.valkeinen@ideasonboard.com>", "date": "2022-05-24T11:46:01", "name": "[libcamera-devel,v2,10/19] py: examples: Add simple-capture.py", "commit_ref": null, "pull_url": null, "state": "superseded", "archived": false, "hash": "58c2d3a6f51e7f1cdaee43a0e20d2820619e9fd3", "submitter": { "id": 109, "url": "https://patchwork.libcamera.org/api/1.1/people/109/?format=api", "name": "Tomi Valkeinen", "email": "tomi.valkeinen@ideasonboard.com" }, "delegate": null, "mbox": "https://patchwork.libcamera.org/patch/16015/mbox/", "series": [ { "id": 3134, "url": "https://patchwork.libcamera.org/api/1.1/series/3134/?format=api", "web_url": "https://patchwork.libcamera.org/project/libcamera/list/?series=3134", "date": "2022-05-24T11:45:51", "name": "More misc Python patches", "version": 2, "mbox": "https://patchwork.libcamera.org/series/3134/mbox/" } ], "comments": "https://patchwork.libcamera.org/api/patches/16015/comments/", "check": "pending", "checks": "https://patchwork.libcamera.org/api/patches/16015/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 7F4C0C3270\n\tfor <parsemail@patchwork.libcamera.org>;\n\tTue, 24 May 2022 11:46:45 +0000 (UTC)", "from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby 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t=1653392804;\n\tbh=LymWA+q6FABhdVSTivdJLURAgL5L49nG23E9Mlc/HeI=;\n\th=To:Date:In-Reply-To:References:Subject:List-Id:List-Unsubscribe:\n\tList-Archive:List-Post:List-Help:List-Subscribe:From:Reply-To:\n\tFrom;\n\tb=xFQA5I+V7HbZq4n7eOZ5Py+F1MJ4n7TO3ceZOoplpErIUdrRQugsrgJGaW+8ilx7t\n\t/NSYZ0A1XJ8ePMOurEEiyWzdEKT1EQW0WdAXT4g8u6Fb+WmD7OeMCel+ldkV6DAB6u\n\tNL3yqnn8jJVwAZMziK6BE7paxv0WX2aNx6T+paeFQKFhelpLTz2vz6gdvuCMmfWNEN\n\tWB+G3IeNME2UW8dj9kLP6M8facal1i0rYN+auBVVTJFrjmEmD1eWodbAgdYqjjLdkI\n\tnzFSPfhYYAGH2xM2ZjzRmiDOR3alHZeoOIlzW5NTA2yjVZ7WTWLz3IrJMSw7vqKguo\n\tNH89SDOnXRMgQ==", "v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com;\n\ts=mail; t=1653392795;\n\tbh=LymWA+q6FABhdVSTivdJLURAgL5L49nG23E9Mlc/HeI=;\n\th=From:To:Cc:Subject:Date:In-Reply-To:References:From;\n\tb=iLZ9g1Xw6rumbNJfKV3CUwfPz3VYx2LJITEemYnohkowYc77zRlMF34XyhCWJVMBX\n\t66BhQRASwdU1UKSaXCQi0kAbs8N8zsL9r/2eRKKvVFcvwqgBma0ym85asAHoavA+t9\n\tgBQ6lQeNRLT6nGxXDVOsAhtj+D1mA9iXQb/aqbx4=" ], "Authentication-Results": "lancelot.ideasonboard.com; dkim=pass (1024-bit key; \n\tunprotected) header.d=ideasonboard.com\n\theader.i=@ideasonboard.com\n\theader.b=\"iLZ9g1Xw\"; 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": "Tue, 24 May 2022 14:46:01 +0300", "Message-Id": "<20220524114610.41848-11-tomi.valkeinen@ideasonboard.com>", "X-Mailer": "git-send-email 2.34.1", "In-Reply-To": "<20220524114610.41848-1-tomi.valkeinen@ideasonboard.com>", "References": "<20220524114610.41848-1-tomi.valkeinen@ideasonboard.com>", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "Subject": "[libcamera-devel] [PATCH v2 10/19] py: examples: Add\n\tsimple-capture.py", "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": "Add an example to showcase the more-or-less minimal capture case.\n\nSigned-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>\n---\n src/py/examples/simple-capture.py | 153 ++++++++++++++++++++++++++++++\n 1 file changed, 153 insertions(+)\n create mode 100755 src/py/examples/simple-capture.py", "diff": "diff --git a/src/py/examples/simple-capture.py b/src/py/examples/simple-capture.py\nnew file mode 100755\nindex 00000000..45df9e7a\n--- /dev/null\n+++ b/src/py/examples/simple-capture.py\n@@ -0,0 +1,153 @@\n+#!/usr/bin/env python3\n+\n+# SPDX-License-Identifier: BSD-3-Clause\n+# Copyright (C) 2022, Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>\n+\n+# A simple minimal capture example showing:\n+# - How to setup the camera\n+# - Capture frames in a blocking manner\n+# - Memory map the frames\n+# - How to stop the camera\n+\n+import argparse\n+import binascii\n+import libcamera as libcam\n+import libcamera.utils\n+import sys\n+\n+\n+def main():\n+ parser = argparse.ArgumentParser()\n+ parser.add_argument('-c', '--camera', type=str, default='1',\n+ help='Camera index number (starting from 1) or part of the name')\n+ parser.add_argument('-f', '--format', type=str, help='Pixel format')\n+ parser.add_argument('-s', '--size', type=str, help='Size (\"WxH\")')\n+ args = parser.parse_args()\n+\n+ cm = libcam.CameraManager.singleton()\n+\n+ try:\n+ if args.camera.isnumeric():\n+ cam_idx = int(args.camera)\n+ cam = next((cam for i, cam in enumerate(cm.cameras) if i + 1 == cam_idx))\n+ else:\n+ cam = next((cam for cam in cm.cameras if args.camera in cam.id))\n+ except Exception:\n+ print(f'Failed to find camera \"{args.camera}\"')\n+ return -1\n+\n+ # Acquire the camera for our use\n+\n+ ret = cam.acquire()\n+ assert ret == 0\n+\n+ # Configure the camera\n+\n+ camconfig = cam.generate_configuration([libcam.StreamRole.StillCapture])\n+\n+ streamconfig = camconfig.at(0)\n+\n+ if args.format:\n+ fmt = libcam.PixelFormat(args.format)\n+ streamconfig.pixel_format = fmt\n+\n+ if args.size:\n+ w, h = [int(v) for v in args.size.split('x')]\n+ streamconfig.size = libcam.Size(w, h)\n+\n+ ret = cam.configure(camconfig)\n+ assert ret == 0\n+\n+ stream = streamconfig.stream\n+\n+ # Allocate the buffers for capture\n+\n+ allocator = libcam.FrameBufferAllocator(cam)\n+ ret = allocator.allocate(stream)\n+ assert ret > 0\n+\n+ num_bufs = len(allocator.buffers(stream))\n+\n+ print(f'Capturing {num_bufs} frames with {streamconfig}')\n+\n+ # Create the requests and assign a buffer for each request\n+\n+ reqs = []\n+ for i in range(num_bufs):\n+ # Use the buffer index as the cookie\n+ req = cam.create_request(i)\n+\n+ buffer = allocator.buffers(stream)[i]\n+ ret = req.add_buffer(stream, buffer)\n+ assert ret == 0\n+\n+ reqs.append(req)\n+\n+ # Start the camera\n+\n+ ret = cam.start()\n+ assert ret == 0\n+\n+ # Queue the requests to the camera\n+\n+ for req in reqs:\n+ ret = cam.queue_request(req)\n+ assert ret == 0\n+\n+ # Wait until the requests are finished\n+\n+ reqs = []\n+\n+ while True:\n+ # cm.read_event() blocks until there is an event\n+ cm.read_event()\n+\n+ # Get all the ready requests\n+ ready_reqs = cm.get_ready_requests()\n+\n+ reqs += ready_reqs\n+\n+ if len(reqs) >= num_bufs:\n+ break\n+\n+ # Process the captured frames\n+\n+ for i, req in enumerate(reqs):\n+ assert i == req.cookie\n+\n+ buffers = req.buffers\n+\n+ # A ready Request could contain multiple buffers if multiple streams\n+ # were being used. Here we know we only have a single stream,\n+ # and we use next(iter()) to get the first and only buffer.\n+\n+ assert len(buffers) == 1\n+\n+ stream, fb = next(iter(buffers.items()))\n+\n+ # Use MappedFrameBuffer to access the pixel data with CPU. We calculate\n+ # the crc for each plane.\n+\n+ with libcamera.utils.MappedFrameBuffer(fb) as mfb:\n+ crcs = [binascii.crc32(p) for p in mfb.planes]\n+\n+ meta = fb.metadata\n+\n+ print('seq {}, bytes {}, CRCs {}'\n+ .format(meta.sequence, meta.bytesused, crcs))\n+\n+ # Stop the camera\n+\n+ ret = cam.stop()\n+ assert ret == 0\n+\n+ # Release the camera\n+\n+ ret = cam.release()\n+ assert ret == 0\n+\n+ return 0\n+\n+\n+if __name__ == '__main__':\n+ sys.exit(main())\n", "prefixes": [ "libcamera-devel", "v2", "10/19" ] }