{"id":14401,"url":"https://patchwork.libcamera.org/api/patches/14401/?format=json","web_url":"https://patchwork.libcamera.org/patch/14401/","project":{"id":1,"url":"https://patchwork.libcamera.org/api/projects/1/?format=json","name":"libcamera","link_name":"libcamera","list_id":"libcamera_core","list_email":"libcamera-devel@lists.libcamera.org","web_url":"","scm_url":"","webscm_url":""},"msgid":"<20211028111520.256612-7-jacopo@jmondi.org>","date":"2021-10-28T11:15:16","name":"[libcamera-devel,06/10] libcamera: framebuffer: Add synchronization Fence","commit_ref":null,"pull_url":null,"state":"superseded","archived":false,"hash":"9b21290a67cef42e55e316de5126e8cf34f084ca","submitter":{"id":3,"url":"https://patchwork.libcamera.org/api/people/3/?format=json","name":"Jacopo Mondi","email":"jacopo@jmondi.org"},"delegate":null,"mbox":"https://patchwork.libcamera.org/patch/14401/mbox/","series":[{"id":2674,"url":"https://patchwork.libcamera.org/api/series/2674/?format=json","web_url":"https://patchwork.libcamera.org/project/libcamera/list/?series=2674","date":"2021-10-28T11:15:10","name":"libcamera: Introduce Fence support","version":1,"mbox":"https://patchwork.libcamera.org/series/2674/mbox/"}],"comments":"https://patchwork.libcamera.org/api/patches/14401/comments/","check":"pending","checks":"https://patchwork.libcamera.org/api/patches/14401/checks/","tags":{},"headers":{"Return-Path":"","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 3D2FEC324E\n\tfor ;\n\tThu, 28 Oct 2021 11:14:49 +0000 (UTC)","from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id 92AF660156;\n\tThu, 28 Oct 2021 13:14:48 +0200 (CEST)","from relay9-d.mail.gandi.net (relay9-d.mail.gandi.net\n\t[217.70.183.199])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id AAFE4600C8\n\tfor ;\n\tThu, 28 Oct 2021 13:14:40 +0200 (CEST)","(Authenticated sender: jacopo@jmondi.org)\n\tby relay9-d.mail.gandi.net (Postfix) with ESMTPSA id 350B3FF802;\n\tThu, 28 Oct 2021 11:14:40 +0000 (UTC)"],"From":"Jacopo Mondi ","To":"libcamera-devel@lists.libcamera.org","Date":"Thu, 28 Oct 2021 13:15:16 +0200","Message-Id":"<20211028111520.256612-7-jacopo@jmondi.org>","X-Mailer":"git-send-email 2.33.1","In-Reply-To":"<20211028111520.256612-1-jacopo@jmondi.org>","References":"<20211028111520.256612-1-jacopo@jmondi.org>","MIME-Version":"1.0","Content-Transfer-Encoding":"8bit","Subject":"[libcamera-devel] [PATCH 06/10] libcamera: framebuffer: Add\n\tsynchronization Fence","X-BeenThere":"libcamera-devel@lists.libcamera.org","X-Mailman-Version":"2.1.29","Precedence":"list","List-Id":"","List-Unsubscribe":",\n\t","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n\t","Errors-To":"libcamera-devel-bounces@lists.libcamera.org","Sender":"\"libcamera-devel\" "},"content":"Add an optional synchronization file descriptor to the FrameBuffer constuctor.\n\nThe fence is handled by the FrameBuffer::Private class by constructing\na Fence class instance to wrap the file descriptor. Once the Request the\nFrameBuffer is part of has completed, the fence file descriptor will read\nas -1 if successfully handled by the library; otherwise the file\ndescriptor value is kept and applications are responsible for closing\nit.\n\nSigned-off-by: Jacopo Mondi \n---\n include/libcamera/framebuffer.h | 5 ++-\n include/libcamera/internal/framebuffer.h | 7 +++-\n src/libcamera/framebuffer.cpp | 46 +++++++++++++++++++++---\n 3 files changed, 52 insertions(+), 6 deletions(-)","diff":"diff --git a/include/libcamera/framebuffer.h b/include/libcamera/framebuffer.h\nindex 7f2f176af691..ac96790b76c0 100644\n--- a/include/libcamera/framebuffer.h\n+++ b/include/libcamera/framebuffer.h\n@@ -57,7 +57,8 @@ public:\n \t\tunsigned int length;\n \t};\n \n-\tFrameBuffer(const std::vector &planes, unsigned int cookie = 0);\n+\tFrameBuffer(const std::vector &planes, unsigned int cookie = 0,\n+\t\t int fence = -1);\n \n \tconst std::vector &planes() const { return planes_; }\n \tRequest *request() const;\n@@ -66,6 +67,8 @@ public:\n \tunsigned int cookie() const { return cookie_; }\n \tvoid setCookie(unsigned int cookie) { cookie_ = cookie; }\n \n+\tint fence() const;\n+\n \tvoid cancel() { metadata_.status = FrameMetadata::FrameCancelled; }\n \n private:\ndiff --git a/include/libcamera/internal/framebuffer.h b/include/libcamera/internal/framebuffer.h\nindex cd33c295466e..db1a4bd72354 100644\n--- a/include/libcamera/internal/framebuffer.h\n+++ b/include/libcamera/internal/framebuffer.h\n@@ -11,6 +11,8 @@\n \n #include \n \n+#include \n+\n namespace libcamera {\n \n class FrameBuffer::Private : public Extensible::Private\n@@ -18,14 +20,17 @@ class FrameBuffer::Private : public Extensible::Private\n \tLIBCAMERA_DECLARE_PUBLIC(FrameBuffer)\n \n public:\n-\tPrivate();\n+\tPrivate(int fence);\n \n \tvoid setRequest(Request *request) { request_ = request; }\n \tbool isContiguous() const { return isContiguous_; }\n+\tconst Fence &fence() const { return fence_; }\n+\tFence &fence() { return fence_; }\n \n private:\n \tRequest *request_;\n \tbool isContiguous_;\n+\tFence fence_;\n };\n \n } /* namespace libcamera */\ndiff --git a/src/libcamera/framebuffer.cpp b/src/libcamera/framebuffer.cpp\nindex d44a98babd05..c3e03896b184 100644\n--- a/src/libcamera/framebuffer.cpp\n+++ b/src/libcamera/framebuffer.cpp\n@@ -111,8 +111,12 @@ LOG_DEFINE_CATEGORY(Buffer)\n * pipeline handlers.\n */\n \n-FrameBuffer::Private::Private()\n-\t: request_(nullptr), isContiguous_(true)\n+/**\n+ * \\brief Construct a FrameBuffer::Private instance\n+ * \\param[in] fence The synchronization fence file descriptor\n+ */\n+FrameBuffer::Private::Private(int fence)\n+\t: request_(nullptr), isContiguous_(true), fence_(fence)\n {\n }\n \n@@ -137,6 +141,18 @@ FrameBuffer::Private::Private()\n * \\return True if the planes are stored contiguously in memory, false otherwise\n */\n \n+/**\n+ * \\fn const FrameBuffer::Private::fence() const\n+ * \\brief Return a const reference to the Fence\n+ * \\return A const reference to the frame buffer fence\n+ */\n+\n+/**\n+ * \\fn FrameBuffer::Private::fence()\n+ * \\brief Return a reference to the Fence\n+ * \\return A reference to the frame buffer fence\n+ */\n+\n /**\n * \\class FrameBuffer\n * \\brief Frame buffer data and its associated dynamic metadata\n@@ -211,9 +227,11 @@ FrameBuffer::Private::Private()\n * \\brief Construct a FrameBuffer with an array of planes\n * \\param[in] planes The frame memory planes\n * \\param[in] cookie Cookie\n+ * \\param[in] fence Synchronization fence\n */\n-FrameBuffer::FrameBuffer(const std::vector &planes, unsigned int cookie)\n-\t: Extensible(std::make_unique()), planes_(planes),\n+FrameBuffer::FrameBuffer(const std::vector &planes, unsigned int cookie,\n+\t\t\t int fence)\n+\t: Extensible(std::make_unique(fence)), planes_(planes),\n \t cookie_(cookie)\n {\n \tmetadata_.planes_.resize(planes_.size());\n@@ -305,6 +323,26 @@ Request *FrameBuffer::request() const\n * libcamera core never modifies the buffer cookie.\n */\n \n+/**\n+ * \\fn FrameBuffer::fence()\n+ * \\brief Return the synchronization fence file descriptor\n+ *\n+ * The fence file descriptor is set by applications at construction time.\n+ *\n+ * Once the Request is queued to the Camera the fence is handled by the\n+ * library and if successfully notified the fence will read as -1 after the\n+ * Request has completed.\n+ *\n+ * If waiting for fence fails, the fence is instead kept in the FrameBuffer\n+ * after the Request has completed and it is responsibility of the\n+ * application to correctly close it.\n+ */\n+int FrameBuffer::fence() const\n+{\n+\tconst Fence &fence = _d()->fence();\n+\treturn fence.fd();\n+}\n+\n /**\n * \\fn FrameBuffer::cancel()\n * \\brief Marks the buffer as cancelled\n","prefixes":["libcamera-devel","06/10"]}