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{ "id": 15431, "url": "https://patchwork.libcamera.org/api/1.1/patches/15431/?format=api", "web_url": "https://patchwork.libcamera.org/patch/15431/", "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": "<20220307124633.115452-7-naush@raspberrypi.com>", "date": "2022-03-07T12:46:33", "name": "[libcamera-devel,v1,6/6] libcamera: v4l2_videodevice: Empty the V4L2 buffer cache on streamOff()", "commit_ref": null, "pull_url": null, "state": "superseded", "archived": false, "hash": "410257105047434d75e8289b9623c54c64e26147", "submitter": { "id": 34, "url": "https://patchwork.libcamera.org/api/1.1/people/34/?format=api", "name": "Naushir Patuck", "email": "naush@raspberrypi.com" }, "delegate": null, "mbox": "https://patchwork.libcamera.org/patch/15431/mbox/", "series": [ { "id": 2954, "url": "https://patchwork.libcamera.org/api/1.1/series/2954/?format=api", "web_url": "https://patchwork.libcamera.org/project/libcamera/list/?series=2954", "date": "2022-03-07T12:46:27", "name": "Raspberry Pi: Efficient start/stop/start sequences", "version": 1, "mbox": "https://patchwork.libcamera.org/series/2954/mbox/" } ], "comments": "https://patchwork.libcamera.org/api/patches/15431/comments/", "check": "pending", "checks": "https://patchwork.libcamera.org/api/patches/15431/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\r\n\t[92.243.16.209])\r\n\tby patchwork.libcamera.org (Postfix) with ESMTPS id 29282C3261\r\n\tfor <parsemail@patchwork.libcamera.org>;\r\n\tMon, 7 Mar 2022 12:46:47 +0000 (UTC)", "from lancelot.ideasonboard.com (localhost [IPv6:::1])\r\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id D696761192;\r\n\tMon, 7 Mar 2022 13:46:46 +0100 (CET)", "from mail-wr1-x436.google.com (mail-wr1-x436.google.com\r\n\t[IPv6:2a00:1450:4864:20::436])\r\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id BBDB761189\r\n\tfor <libcamera-devel@lists.libcamera.org>;\r\n\tMon, 7 Mar 2022 13:46:43 +0100 (CET)", "by mail-wr1-x436.google.com with SMTP id u1so23051409wrg.11\r\n\tfor <libcamera-devel@lists.libcamera.org>;\r\n\tMon, 07 Mar 2022 04:46:43 -0800 (PST)", "from naush-laptop.pitowers.org\r\n\t([2a00:1098:3142:14:c644:e9b3:de0b:54c5])\r\n\tby smtp.gmail.com with ESMTPSA id\r\n\tz6-20020a1cf406000000b0037c4e2d3baesm19759582wma.19.2022.03.07.04.46.42\r\n\t(version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256);\r\n\tMon, 07 Mar 2022 04:46:42 -0800 (PST)" ], "DKIM-Signature": [ "v=1; 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dkim=pass (2048-bit key; \r\n\tunprotected) header.d=raspberrypi.com\r\n\theader.i=@raspberrypi.com\r\n\theader.b=\"f9lzWf3G\"; dkim-atps=neutral", "X-Google-DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed;\r\n\td=1e100.net; s=20210112;\r\n\th=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to\r\n\t:references:mime-version:content-transfer-encoding;\r\n\tbh=PRkhqrlp04FHuT3lgzDxfAUE/vo6bJn9nSQyQ3qDDVQ=;\r\n\tb=ayWcLpj5wJnz+Ww0AVS3bIIioA2rYouq7G91nyCzi6LF49KqQz2DVjQuhjNXIAw6e7\r\n\tT6fLp6dx/xiNBUrbpY8TRA6vif3TZnatG4KQiMI0ORQ479D6m4BUVH7R/NYnzfQYnMz/\r\n\tI4tOVGZQ6rPMJh2sU0wNkIv89925fa7f5wajQ0weWluGvaEKFEv+ucMTn4fKSPNWxrc5\r\n\tKwT4Vlrna2U6wCShiqUaYHZeNVH/ASZDLj4dDVfnT3aKXLL9/wuEW09t7TSFmrUP5U7x\r\n\tQDK2CF4wdVaA/2CSY9MbaClfJD0PrzrqIUePc5WzvsKUF3zaxkv9l3C34BusEkVES/EM\r\n\tnTVQ==", "X-Gm-Message-State": "AOAM531MWUQKmDvFEOy9lUVlMVwHQiT/is/nyQvYYROwhjW9apsaNl5C\r\n\tJw03b1KMgoLYfq/qqb7g98f0AdK3XM+OZA==", "X-Google-Smtp-Source": "ABdhPJxke08C4cGunZzAowhxRMzVxMnRtJWGXX3Kkrrxocln93zHO1Htesai7RgbKdttpuheFhpVQw==", "X-Received": "by 2002:a5d:538b:0:b0:1f1:e60b:20c2 with SMTP id\r\n\td11-20020a5d538b000000b001f1e60b20c2mr5982636wrv.294.1646657203211; \r\n\tMon, 07 Mar 2022 04:46:43 -0800 (PST)", "To": "libcamera-devel@lists.libcamera.org", "Date": "Mon, 7 Mar 2022 12:46:33 +0000", "Message-Id": "<20220307124633.115452-7-naush@raspberrypi.com>", "X-Mailer": "git-send-email 2.25.1", "In-Reply-To": "<20220307124633.115452-1-naush@raspberrypi.com>", "References": "<20220307124633.115452-1-naush@raspberrypi.com>", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "Subject": "[libcamera-devel] [PATCH v1 6/6] libcamera: v4l2_videodevice: Empty\r\n\tthe V4L2 buffer cache on streamOff()", "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>,\r\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>,\r\n\t<mailto:libcamera-devel-request@lists.libcamera.org?subject=subscribe>", "From": "Naushir Patuck via libcamera-devel\r\n\t<libcamera-devel@lists.libcamera.org>", "Reply-To": "Naushir Patuck <naush@raspberrypi.com>", "Errors-To": "libcamera-devel-bounces@lists.libcamera.org", "Sender": "\"libcamera-devel\" <libcamera-devel-bounces@lists.libcamera.org>" }, "content": "When streamOff() is called, ensure the cache entires for the remaining queued\nbuffers are freed since this will not happen via the dequeueBuffer() mechanism.\n\nAdditionally, add a V4L2BufferCache::isEmpty() function and assert that the\ncache is empty at the end of the streamOff() call.\n\nSigned-off-by: Naushir Patuck <naush@raspberrypi.com>\n---\n include/libcamera/internal/v4l2_videodevice.h | 1 +\n src/libcamera/v4l2_videodevice.cpp | 16 ++++++++++++++++\n 2 files changed, 17 insertions(+)", "diff": "diff --git a/include/libcamera/internal/v4l2_videodevice.h b/include/libcamera/internal/v4l2_videodevice.h\r\nindex 2d2ccc477c91..37747c0b2f27 100644\r\n--- a/include/libcamera/internal/v4l2_videodevice.h\r\n+++ b/include/libcamera/internal/v4l2_videodevice.h\r\n@@ -126,6 +126,7 @@ public:\r\n \r\n \tint get(const FrameBuffer &buffer);\r\n \tvoid put(unsigned int index);\r\n+\tbool isEmpty() const;\r\n \r\n private:\r\n \tclass Entry\r\ndiff --git a/src/libcamera/v4l2_videodevice.cpp b/src/libcamera/v4l2_videodevice.cpp\r\nindex 5f36ee20710d..9da82697e7f0 100644\r\n--- a/src/libcamera/v4l2_videodevice.cpp\r\n+++ b/src/libcamera/v4l2_videodevice.cpp\r\n@@ -262,6 +262,19 @@ void V4L2BufferCache::put(unsigned int index)\r\n \tcache_[index].free_ = true;\r\n }\r\n \r\n+/**\r\n+ * \\brief Check if all the entries in the cache are unused\r\n+ */\r\n+bool V4L2BufferCache::isEmpty() const\r\n+{\r\n+\tfor (auto const &entry : cache_) {\r\n+\t\tif (!entry.free_)\r\n+\t\t\treturn false;\r\n+\t}\r\n+\r\n+\treturn true;\r\n+}\r\n+\r\n V4L2BufferCache::Entry::Entry()\r\n \t: free_(true), lastUsed_(0)\r\n {\r\n@@ -1832,10 +1845,13 @@ int V4L2VideoDevice::streamOff()\r\n \tfor (auto it : queuedBuffers_) {\r\n \t\tFrameBuffer *buffer = it.second;\r\n \r\n+\t\tcache_->put(it.first);\r\n \t\tbuffer->metadata_.status = FrameMetadata::FrameCancelled;\r\n \t\tbufferReady.emit(buffer);\r\n \t}\r\n \r\n+\tASSERT(cache_->isEmpty());\r\n+\r\n \tqueuedBuffers_.clear();\r\n \tfdBufferNotifier_->setEnabled(false);\r\n \tstreaming_ = false;", "prefixes": [ "libcamera-devel", "v1", "6/6" ] }