{"id":24612,"url":"https://patchwork.libcamera.org/api/patches/24612/?format=json","web_url":"https://patchwork.libcamera.org/patch/24612/","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":"<20251013093816.140501-1-uajain@igalia.com>","date":"2025-10-13T09:38:16","name":"gstreamer: Track RequestWrap's GstBuffer using GstPad","commit_ref":null,"pull_url":null,"state":"superseded","archived":false,"hash":"9de6350e0e4f0f9aabe6b8e0c99adfa2ccf5e747","submitter":{"id":232,"url":"https://patchwork.libcamera.org/api/people/232/?format=json","name":"Umang Jain","email":"uajain@igalia.com"},"delegate":null,"mbox":"https://patchwork.libcamera.org/patch/24612/mbox/","series":[{"id":5494,"url":"https://patchwork.libcamera.org/api/series/5494/?format=json","web_url":"https://patchwork.libcamera.org/project/libcamera/list/?series=5494","date":"2025-10-13T09:38:16","name":"gstreamer: Track RequestWrap's GstBuffer using GstPad","version":1,"mbox":"https://patchwork.libcamera.org/series/5494/mbox/"}],"comments":"https://patchwork.libcamera.org/api/patches/24612/comments/","check":"pending","checks":"https://patchwork.libcamera.org/api/patches/24612/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 CF7CCBE080\n\tfor ;\n\tMon, 13 Oct 2025 09:38:06 +0000 (UTC)","from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id DB35B60469;\n\tMon, 13 Oct 2025 11:38:05 +0200 (CEST)","from fanzine2.igalia.com (fanzine2.igalia.com [213.97.179.56])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id 884ED60317\n\tfor ;\n\tMon, 13 Oct 2025 11:38:02 +0200 (CEST)","from [49.36.127.56] (helo=uajain)\n\tby fanzine2.igalia.com with esmtpsa \n\t(Cipher TLS1.3:ECDHE_X25519__RSA_PSS_RSAE_SHA256__AES_256_GCM:256)\n\t(Exim) id 1v8F0D-008ryc-3x; Mon, 13 Oct 2025 11:38:01 +0200"],"Authentication-Results":"lancelot.ideasonboard.com;\n\tdkim=fail reason=\"signature verification failed\" (2048-bit key;\n\tunprotected) header.d=igalia.com header.i=@igalia.com\n\theader.b=\"R9Jh1Sag\"; dkim-atps=neutral","DKIM-Signature":"v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=igalia.com;\n\ts=20170329;\n\th=Content-Transfer-Encoding:MIME-Version:Message-ID:Date:Subject:\n\tCc:To:From:Sender:Reply-To:Content-Type:Content-ID:Content-Description:\n\tResent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:\n\tIn-Reply-To:References:List-Id:List-Help:List-Unsubscribe:List-Subscribe:\n\tList-Post:List-Owner:List-Archive;\n\tbh=1nEnA/1uq2MGhkZjnznOBvbw/RndHmV7qt16Lh2J52Q=;\n\tb=R9Jh1SaghIY4wXSyB1TUBq38zF\n\tnQq+WszUyP78sDmx/Bhq7hqZfaAtKO5oC6g4IEml6Ff+2bDxmg2lpVzf5lm5iib+C/DLTW5JyHnFD\n\t9hssK870SRKAL8qQmhaGUO7T7vFUFMCse1myaGuSZXU2SyVLuJ8JCTR3t1Ffwlufyrb7NpsRSrV8I\n\tZLAy+odIu7oz7SSUbBc+0WM7+v58Op4CHKL3LDFv/uSqnxSesf41czyP15aLWYlvEMZDRgkhMIleL\n\tqjaKQvQ0E2bcwkvU+7Hq+C2NuBFjvz3qUOuSxxKuYA9OkpNN7XZz4nyunboDObi7toWuDZIm4pMTu\n\twPX/j3SA==;","From":"Umang Jain ","To":"libcamera-devel@lists.libcamera.org","Cc":"Nicolas Dufresne ,\n\tUmang Jain ","Subject":"[PATCH] gstreamer: Track RequestWrap's GstBuffer using GstPad","Date":"Mon, 13 Oct 2025 15:08:16 +0530","Message-ID":"<20251013093816.140501-1-uajain@igalia.com>","X-Mailer":"git-send-email 2.51.0","MIME-Version":"1.0","Content-Transfer-Encoding":"8bit","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":"GstPad is the link point where the buffers are pushed/pulled in the\ngstreamer pipeline hence, it makes more sense to associate and\ntrack GstBuffer(s) using GstPad rather than libcamera::Stream in\nRequestWrap.\n\nNo functional changes intended as there is only one stream per pad\nconfiguration followed in libcamerasrc.\n\nSigned-off-by: Umang Jain \n---\n src/gstreamer/gstlibcamerasrc.cpp | 24 ++++++++++++------------\n 1 file changed, 12 insertions(+), 12 deletions(-)","diff":"diff --git a/src/gstreamer/gstlibcamerasrc.cpp b/src/gstreamer/gstlibcamerasrc.cpp\nindex 75e0864c..71236a0f 100644\n--- a/src/gstreamer/gstlibcamerasrc.cpp\n+++ b/src/gstreamer/gstlibcamerasrc.cpp\n@@ -54,11 +54,11 @@ struct RequestWrap {\n \tRequestWrap(std::unique_ptr request);\n \t~RequestWrap();\n \n-\tvoid attachBuffer(Stream *stream, GstBuffer *buffer);\n-\tGstBuffer *detachBuffer(Stream *stream);\n+\tvoid attachBuffer(GstPad *srcpad, GstBuffer *buffer);\n+\tGstBuffer *detachBuffer(GstPad *srcpad);\n \n \tstd::unique_ptr request_;\n-\tstd::map buffers_;\n+\tstd::map buffers_;\n \n \tGstClockTime latency_;\n \tGstClockTime pts_;\n@@ -71,32 +71,33 @@ RequestWrap::RequestWrap(std::unique_ptr request)\n \n RequestWrap::~RequestWrap()\n {\n-\tfor (std::pair &item : buffers_) {\n+\tfor (std::pair &item : buffers_) {\n \t\tif (item.second)\n \t\t\tgst_buffer_unref(item.second);\n \t}\n }\n \n-void RequestWrap::attachBuffer(Stream *stream, GstBuffer *buffer)\n+void RequestWrap::attachBuffer(GstPad *srcpad, GstBuffer *buffer)\n {\n \tFrameBuffer *fb = gst_libcamera_buffer_get_frame_buffer(buffer);\n+\tStream *stream = gst_libcamera_pad_get_stream(srcpad);\n \n \trequest_->addBuffer(stream, fb);\n \n-\tauto item = buffers_.find(stream);\n+\tauto item = buffers_.find(srcpad);\n \tif (item != buffers_.end()) {\n \t\tgst_buffer_unref(item->second);\n \t\titem->second = buffer;\n \t} else {\n-\t\tbuffers_[stream] = buffer;\n+\t\tbuffers_[srcpad] = buffer;\n \t}\n }\n \n-GstBuffer *RequestWrap::detachBuffer(Stream *stream)\n+GstBuffer *RequestWrap::detachBuffer(GstPad *srcpad)\n {\n \tGstBuffer *buffer = nullptr;\n \n-\tauto item = buffers_.find(stream);\n+\tauto item = buffers_.find(srcpad);\n \tif (item != buffers_.end()) {\n \t\tbuffer = item->second;\n \t\titem->second = nullptr;\n@@ -195,7 +196,6 @@ int GstLibcameraSrcState::queueRequest()\n \t\tstd::make_unique(std::move(request));\n \n \tfor (GstPad *srcpad : srcpads_) {\n-\t\tStream *stream = gst_libcamera_pad_get_stream(srcpad);\n \t\tGstLibcameraPool *pool = gst_libcamera_pad_get_pool(srcpad);\n \t\tGstBuffer *buffer;\n \t\tGstFlowReturn ret;\n@@ -210,7 +210,7 @@ int GstLibcameraSrcState::queueRequest()\n \t\t\treturn -ENOBUFS;\n \t\t}\n \n-\t\twrap->attachBuffer(stream, buffer);\n+\t\twrap->attachBuffer(srcpad, buffer);\n \t}\n \n \tGST_TRACE_OBJECT(src_, \"Requesting buffers\");\n@@ -360,7 +360,7 @@ int GstLibcameraSrcState::processRequest()\n \tfor (gsize i = 0; i < srcpads_.size(); i++) {\n \t\tGstPad *srcpad = srcpads_[i];\n \t\tStream *stream = gst_libcamera_pad_get_stream(srcpad);\n-\t\tGstBuffer *buffer = wrap->detachBuffer(stream);\n+\t\tGstBuffer *buffer = wrap->detachBuffer(srcpad);\n \n \t\tFrameBuffer *fb = gst_libcamera_buffer_get_frame_buffer(buffer);\n \t\tconst StreamConfiguration &stream_cfg = stream->configuration();\n","prefixes":[]}