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{ "id": 12351, "url": "https://patchwork.libcamera.org/api/covers/12351/?format=api", "web_url": "https://patchwork.libcamera.org/cover/12351/", "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": "<20210521154227.60186-1-jacopo@jmondi.org>", "date": "2021-05-21T15:42:19", "name": "[libcamera-devel,v3,0/8] Implement flush() camera operation", "submitter": { "id": 3, "url": "https://patchwork.libcamera.org/api/people/3/?format=api", "name": "Jacopo Mondi", "email": "jacopo@jmondi.org" }, "mbox": "https://patchwork.libcamera.org/cover/12351/mbox/", "series": [ { "id": 2045, "url": "https://patchwork.libcamera.org/api/series/2045/?format=api", "web_url": "https://patchwork.libcamera.org/project/libcamera/list/?series=2045", "date": "2021-05-21T15:42:19", "name": "Implement flush() camera operation", "version": 3, "mbox": "https://patchwork.libcamera.org/series/2045/mbox/" } ], "comments": "https://patchwork.libcamera.org/api/covers/12351/comments/", "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 7099EC31FF\n\tfor <parsemail@patchwork.libcamera.org>;\n\tFri, 21 May 2021 15:41:48 +0000 (UTC)", "from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id A0C7A6891F;\n\tFri, 21 May 2021 17:41:47 +0200 (CEST)", "from relay8-d.mail.gandi.net (relay8-d.mail.gandi.net\n\t[217.70.183.201])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id 30E246891A\n\tfor <libcamera-devel@lists.libcamera.org>;\n\tFri, 21 May 2021 17:41:46 +0200 (CEST)", "(Authenticated sender: jacopo@jmondi.org)\n\tby relay8-d.mail.gandi.net (Postfix) with ESMTPSA id AEFE31BF20A;\n\tFri, 21 May 2021 15:41:45 +0000 (UTC)" ], "From": "Jacopo Mondi <jacopo@jmondi.org>", "To": "libcamera-devel@lists.libcamera.org", "Date": "Fri, 21 May 2021 17:42:19 +0200", "Message-Id": "<20210521154227.60186-1-jacopo@jmondi.org>", "X-Mailer": "git-send-email 2.31.1", "MIME-Version": "1.0", "Content-Type": "text/plain; charset=UTF-8", "Content-Transfer-Encoding": "8bit", "Subject": "[libcamera-devel] [PATCH v3 0/8] Implement flush() camera operation", "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": "Implement the flush() camera operation in Android CameraDevice class.\n\nThe series includes the already sent\n\"android: Rework request completion notification\" patch slightly modified:\n\n- set partial_results = 0 in case of error (as reported by cros_camera_test)\n- on fatal ERROR_DEVICE notify() to the framework first then call Fatal. Record\n with a \\todo the on-going discussion on the requirement to close the camera\n to handle failures gracefully.\n\nTo get to a successfull implementation of flush() a bit of preparatory work is\nrequired as currently Requests that fails to queue to the pipeline handler are\nnot returned to the application. Add Request::cancel() and call it in the\nPipelineHandler base class when calling queueRequestDevice() fails to allow\napplication to keep track of the queued requests.\n\nOn top of that, prepare the CameraDevice to support flush with a few clean-up\npatches, then implement the operation.\n\nNo regression detected when running CTS in LIMITED mode.\n\nTested with cros_camera_test:\n\n # cros_camera_test --gtest_filter=\"Camera3FrameTest/Camera3FlushRequestsTest*\"\n [==========] 12 tests from 1 test suite ran. (1380 ms total)\n [ PASSED ] 12 tests.\n\nThanks\n j\n\nv2->v3:\n - Request::cancel():\n - Add tracepoint in request.tp\n - Emitt Camera::bufferCompleted signal for each cancelled buffer\n - Do not complete the Request\n\n - PipelineHandler\n - Do not emit Camera::bufferCompleted as Request::cancel() does so\n - Do not complete the request immediately but call\n PipelineHandler::completeRequest()\n\n - Flush\n - Use CameraMutex_ in place of FlushMutex_ to wait on the flushed_ condition\n as suggested by Hiro. This guarantees that any access to the camera state\n is protected by the same mutex and code is simplified.\n - Assert that stop() does not get called while flushing as suggested by Hiro.\n\nv1->v2:\n - The majority of patches in the series have not been changed if not for\n collecting tags. However 8/8 which implement the actual flush() has been\n changed to address Hiro's comment about protecting close() and\n configureStreams() from being concurrently run with flush().\n\n - 8/8:\n - Introduce a new flushed_ condition variable to be used by close() and\n configureStreams() to be unlocked when flushing has terminated.\n\n- The patches that introduce Request::cancel() has pending discussion with\n Hiro and Niklas. As they impact the libcamera API I'll wait for Laurent to\n chime-in.\n\nJacopo Mondi (8):\n android: Rework request completion notification\n libcamera: request: Add Request::cancel()\n libcamera: pipeline_handler: Cancel Request on queueing failure\n android: camera_device: Replace running_ with CameraState\n android: Replace scoped_lock<> with libcamera::MutexLocker\n android: Guard access to the camera state\n android: Rename CameraDevice::mutex_\n android: Implement flush() camera operation\n\n .../libcamera/internal/tracepoints/request.tp | 8 +\n include/libcamera/request.h | 1 +\n src/android/camera_device.cpp | 260 +++++++++++++-----\n src/android/camera_device.h | 20 +-\n src/android/camera_ops.cpp | 8 +-\n src/libcamera/pipeline_handler.cpp | 8 +-\n src/libcamera/request.cpp | 28 ++\n 7 files changed, 256 insertions(+), 77 deletions(-)\n\n--\n2.31.1" }