{"id":12652,"url":"https://patchwork.libcamera.org/api/1.1/patches/12652/?format=json","web_url":"https://patchwork.libcamera.org/patch/12652/","project":{"id":1,"url":"https://patchwork.libcamera.org/api/1.1/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":"<20210618183218.449146-1-vedantparanjape160201@gmail.com>","date":"2021-06-18T18:32:18","name":"[libcamera-devel,v6] gstreamer: Added virtual functions needed to support request pads","commit_ref":"53a0d80af0f9983d6bc0d54b0e85403a08721488","pull_url":null,"state":"accepted","archived":false,"hash":"b8077dd77cf808af2482f427527f5af70406d8dc","submitter":{"id":85,"url":"https://patchwork.libcamera.org/api/1.1/people/85/?format=json","name":"Vedant Paranjape","email":"vedantparanjape160201@gmail.com"},"delegate":null,"mbox":"https://patchwork.libcamera.org/patch/12652/mbox/","series":[{"id":2153,"url":"https://patchwork.libcamera.org/api/1.1/series/2153/?format=json","web_url":"https://patchwork.libcamera.org/project/libcamera/list/?series=2153","date":"2021-06-18T18:32:18","name":"[libcamera-devel,v6] gstreamer: Added virtual functions needed to support request pads","version":6,"mbox":"https://patchwork.libcamera.org/series/2153/mbox/"}],"comments":"https://patchwork.libcamera.org/api/patches/12652/comments/","check":"pending","checks":"https://patchwork.libcamera.org/api/patches/12652/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 44E5EBD78E\n\tfor ;\n\tFri, 18 Jun 2021 18:33:41 +0000 (UTC)","from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id AF61460298;\n\tFri, 18 Jun 2021 20:33:40 +0200 (CEST)","from mail-pf1-x432.google.com (mail-pf1-x432.google.com\n\t[IPv6:2607:f8b0:4864:20::432])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id 2F6A460298\n\tfor ;\n\tFri, 18 Jun 2021 20:33:39 +0200 (CEST)","by mail-pf1-x432.google.com with SMTP id u18so2948235pfk.11\n\tfor ;\n\tFri, 18 Jun 2021 11:33:39 -0700 (PDT)","from localhost.localdomain ([1.186.76.76])\n\tby smtp.googlemail.com with ESMTPSA id\n\tx20sm8557835pfh.112.2021.06.18.11.33.09\n\t(version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256);\n\tFri, 18 Jun 2021 11:33:36 -0700 (PDT)"],"Authentication-Results":"lancelot.ideasonboard.com;\n\tdkim=fail reason=\"signature verification failed\" (2048-bit key;\n\tunprotected) header.d=gmail.com header.i=@gmail.com\n\theader.b=\"hDyZDHD6\"; 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\n\tFri, 18 Jun 2021 11:33:37 -0700 (PDT)","From":"Vedant Paranjape ","To":"libcamera-devel@lists.libcamera.org","Date":"Sat, 19 Jun 2021 00:02:18 +0530","Message-Id":"<20210618183218.449146-1-vedantparanjape160201@gmail.com>","X-Mailer":"git-send-email 2.25.1","MIME-Version":"1.0","Content-Transfer-Encoding":"8bit","Subject":"[libcamera-devel] [PATCH v6] gstreamer: Added virtual functions\n\tneeded to support request pads","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","Cc":"Vedant Paranjape ","Errors-To":"libcamera-devel-bounces@lists.libcamera.org","Sender":"\"libcamera-devel\" "},"content":"This patch adds support for using request pads in libcamerasrc Gst\nElement. It allows a user to request multiple streams if the platform\nsupports multistream output using libcamera.\n\nThis was tested on Raspberry Pi 4B+ with a camera connected to CSI port.\nIt can be tested by running the following command\n\ngst-launch-1.0 libcamerasrc camera-name=\"\" name=src src.src ! queue ! videoconvert ! autovideosink src.src_0 ! queue ! videoconvert ! autovideosink\n\nSigned-off-by: Vedant Paranjape \n---\n src/gstreamer/gstlibcamerasrc.cpp | 53 ++++++++++++++++++++++++++++++-\n 1 file changed, 52 insertions(+), 1 deletion(-)","diff":"diff --git a/src/gstreamer/gstlibcamerasrc.cpp b/src/gstreamer/gstlibcamerasrc.cpp\nindex ccc61590..ea53c2b5 100644\n--- a/src/gstreamer/gstlibcamerasrc.cpp\n+++ b/src/gstreamer/gstlibcamerasrc.cpp\n@@ -361,10 +361,12 @@ gst_libcamera_src_task_enter(GstTask *task, [[maybe_unused]] GThread *thread,\n \tGST_DEBUG_OBJECT(self, \"Streaming thread has started\");\n \n \tguint group_id = gst_util_group_id_next();\n+\tgint stream_id_num = 0;\n \tStreamRoles roles;\n \tfor (GstPad *srcpad : state->srcpads_) {\n \t\t/* Create stream-id and push stream-start. */\n-\t\tg_autofree gchar *stream_id = gst_pad_create_stream_id(srcpad, GST_ELEMENT(self), nullptr);\n+\t\tg_autofree gchar *stream_id_intermediate = g_strdup_printf(\"%i%i\", group_id, stream_id_num++);\n+\t\tg_autofree gchar *stream_id = gst_pad_create_stream_id(srcpad, GST_ELEMENT(self), stream_id_intermediate);\n \t\tGstEvent *event = gst_event_new_stream_start(stream_id);\n \t\tgst_event_set_group_id(event, group_id);\n \t\tgst_pad_push_event(srcpad, event);\n@@ -640,6 +642,53 @@ gst_libcamera_src_init(GstLibcameraSrc *self)\n \tself->state = state;\n }\n \n+static GstPad *\n+gst_libcamera_src_request_new_pad(GstElement *element, GstPadTemplate *templ,\n+\t\t\t\t const gchar *name, [[maybe_unused]] const GstCaps *caps)\n+{\n+\tGstLibcameraSrc *self = GST_LIBCAMERA_SRC(element);\n+\tg_autoptr(GstPad) pad = NULL;\n+\n+\tGST_DEBUG_OBJECT(self, \"new request pad created\");\n+\n+\tpad = gst_pad_new_from_template(templ, name);\n+\tg_object_ref_sink(pad);\n+\n+\tif (gst_element_add_pad(element, pad)) {\n+\t\tGLibLocker lock(GST_OBJECT(self));\n+\t\tself->state->srcpads_.push_back(reinterpret_cast(g_object_ref(pad)));\n+\t} else {\n+\t\tGST_ELEMENT_ERROR(element, STREAM, FAILED,\n+\t\t\t\t (\"Internal data stream error.\"),\n+\t\t\t\t (\"Could not add pad to element\"));\n+\t\treturn NULL;\n+\t}\n+\n+\treturn reinterpret_cast(g_steal_pointer(&pad));\n+}\n+\n+static void\n+gst_libcamera_src_release_pad(GstElement *element, GstPad *pad)\n+{\n+\tGstLibcameraSrc *self = GST_LIBCAMERA_SRC(element);\n+\n+\tGST_DEBUG_OBJECT(self, \"Pad %\" GST_PTR_FORMAT \" being released\", pad);\n+\n+\t{\n+\t\tGLibLocker lock(GST_OBJECT(self));\n+\t\tstd::vector &pads = self->state->srcpads_;\n+\t\tauto begin_iterator = pads.begin();\n+\t\tauto end_iterator = pads.end();\n+\t\tauto pad_iterator = std::find(begin_iterator, end_iterator, pad);\n+\n+\t\tif (pad_iterator != end_iterator) {\n+\t\t\tg_object_unref(*pad_iterator);\n+\t\t\tpads.erase(pad_iterator);\n+\t\t}\n+\t}\n+\tgst_element_remove_pad(element, pad);\n+}\n+\n static void\n gst_libcamera_src_class_init(GstLibcameraSrcClass *klass)\n {\n@@ -650,6 +699,8 @@ gst_libcamera_src_class_init(GstLibcameraSrcClass *klass)\n \tobject_class->get_property = gst_libcamera_src_get_property;\n \tobject_class->finalize = gst_libcamera_src_finalize;\n \n+\telement_class->request_new_pad = gst_libcamera_src_request_new_pad;\n+\telement_class->release_pad = gst_libcamera_src_release_pad;\n \telement_class->change_state = gst_libcamera_src_change_state;\n \n \tgst_element_class_set_metadata(element_class,\n","prefixes":["libcamera-devel","v6"]}