[{"id":34411,"web_url":"https://patchwork.libcamera.org/comment/34411/","msgid":"","date":"2025-06-04T13:23:45","subject":"Re: [PATCH v2 7/7] gstreamer: Replace NULL with nullptr","submitter":{"id":216,"url":"https://patchwork.libcamera.org/api/people/216/","name":"Barnabás Pőcze","email":"barnabas.pocze@ideasonboard.com"},"content":"Hi\n\n2025. 06. 04. 15:07 keltezéssel, Laurent Pinchart írta:\n> Usage of NULL has slowly crept in the libcamerasrc sources. Replace it\n> with nullptr.\n\nI think we should set up clang-tidy in the CI. It has:\nhttps://clang.llvm.org/extra/clang-tidy/checks/modernize/use-nullptr.html\nand many more useful things. Unfortunately every time I run it I am faced\nwith the fact that it runs quite slowly when using a number of checks, so\nit would probably have to be limited to the changed source files.\n\nReviewed-by: Barnabás Pőcze \n\n\n> \n> Signed-off-by: Laurent Pinchart \n> ---\n> src/gstreamer/gstlibcamera-controls.cpp.in | 2 +-\n> src/gstreamer/gstlibcamerapad.cpp | 2 +-\n> src/gstreamer/gstlibcamerasrc.cpp | 23 +++++++++++-----------\n> 3 files changed, 14 insertions(+), 13 deletions(-)\n> \n> diff --git a/src/gstreamer/gstlibcamera-controls.cpp.in b/src/gstreamer/gstlibcamera-controls.cpp.in\n> index 89c530da0b4a..2a16b39a93d9 100644\n> --- a/src/gstreamer/gstlibcamera-controls.cpp.in\n> +++ b/src/gstreamer/gstlibcamera-controls.cpp.in\n> @@ -68,7 +68,7 @@ static const GEnumValue {{ ctrl.name|snake_case }}_types[] = {\n> \t\t\"{{ enum.gst_name }}\"\n> \t},\n> {%- endfor %}\n> -\t{0, NULL, NULL}\n> +\t{0, nullptr, nullptr}\n> };\n> \n> #define TYPE_{{ ctrl.name|snake_case|upper }} \\\n> diff --git a/src/gstreamer/gstlibcamerapad.cpp b/src/gstreamer/gstlibcamerapad.cpp\n> index 3bc2bc87e773..81a0ef44cc6f 100644\n> --- a/src/gstreamer/gstlibcamerapad.cpp\n> +++ b/src/gstreamer/gstlibcamerapad.cpp\n> @@ -102,7 +102,7 @@ gst_libcamera_stream_role_get_type()\n> \t\t\t\"libcamera::Viewfinder\",\n> \t\t\t\"view-finder\",\n> \t\t},\n> -\t\t{ 0, NULL, NULL }\n> +\t\t{ 0, nullptr, nullptr }\n> \t};\n> \n> \tif (!type)\n> diff --git a/src/gstreamer/gstlibcamerasrc.cpp b/src/gstreamer/gstlibcamerasrc.cpp\n> index eec8163e88e7..16b1d08b3053 100644\n> --- a/src/gstreamer/gstlibcamerasrc.cpp\n> +++ b/src/gstreamer/gstlibcamerasrc.cpp\n> @@ -367,10 +367,10 @@ int GstLibcameraSrcState::processRequest()\n> \n> \t\tif (video_pool) {\n> \t\t\t/* Only set video pool when a copy is needed. */\n> -\t\t\tGstBuffer *copy = NULL;\n> +\t\t\tGstBuffer *copy = nullptr;\n> \t\t\tconst GstVideoInfo info = gst_libcamera_pad_get_video_info(srcpad);\n> \n> -\t\t\tret = gst_buffer_pool_acquire_buffer(video_pool, ©, NULL);\n> +\t\t\tret = gst_buffer_pool_acquire_buffer(video_pool, ©, nullptr);\n> \t\t\tif (ret != GST_FLOW_OK) {\n> \t\t\t\tgst_buffer_unref(buffer);\n> \t\t\t\tGST_ELEMENT_ERROR(src_, RESOURCE, SETTINGS,\n> @@ -541,8 +541,8 @@ static std::tuple\n> gst_libcamera_create_video_pool(GstLibcameraSrc *self, GstPad *srcpad,\n> \t\t\t\tGstCaps *caps, const GstVideoInfo *info)\n> {\n> -\tg_autoptr(GstQuery) query = NULL;\n> -\tg_autoptr(GstBufferPool) pool = NULL;\n> +\tg_autoptr(GstQuery) query = nullptr;\n> +\tg_autoptr(GstBufferPool) pool = nullptr;\n> \tconst gboolean need_pool = true;\n> \n> \t/*\n> @@ -554,8 +554,8 @@ gst_libcamera_create_video_pool(GstLibcameraSrc *self, GstPad *srcpad,\n> \n> \tif (!gst_pad_peer_query(srcpad, query))\n> \t\tGST_DEBUG_OBJECT(self, \"Didn't get downstream ALLOCATION hints\");\n> -\telse if (gst_query_find_allocation_meta(query, GST_VIDEO_META_API_TYPE, NULL))\n> -\t\treturn { NULL, 0 };\n> +\telse if (gst_query_find_allocation_meta(query, GST_VIDEO_META_API_TYPE, nullptr))\n> +\t\treturn { nullptr, 0 };\n> \n> \tGST_WARNING_OBJECT(self, \"Downstream doesn't support video meta, need to copy frame.\");\n> \n> @@ -564,7 +564,8 @@ gst_libcamera_create_video_pool(GstLibcameraSrc *self, GstPad *srcpad,\n> \t * create a new pool.\n> \t */\n> \tif (gst_query_get_n_allocation_pools(query) > 0)\n> -\t\tgst_query_parse_nth_allocation_pool(query, 0, &pool, NULL, NULL, NULL);\n> +\t\tgst_query_parse_nth_allocation_pool(query, 0, &pool, nullptr,\n> +\t\t\t\t\t\t nullptr, nullptr);\n> \n> \tif (!pool) {\n> \t\tGstStructure *config;\n> @@ -583,7 +584,7 @@ gst_libcamera_create_video_pool(GstLibcameraSrc *self, GstPad *srcpad,\n> \t\tGST_ELEMENT_ERROR(self, RESOURCE, SETTINGS,\n> \t\t\t\t (\"Failed to active buffer pool\"),\n> \t\t\t\t (\"gst_libcamera_src_negotiate() failed.\"));\n> -\t\treturn { NULL, -EINVAL };\n> +\t\treturn { nullptr, -EINVAL };\n> \t}\n> \n> \treturn { reinterpret_cast(g_steal_pointer(&pool)), 0 };\n> @@ -660,7 +661,7 @@ gst_libcamera_src_negotiate(GstLibcameraSrc *self)\n> \tfor (gsize i = 0; i < state->srcpads_.size(); i++) {\n> \t\tGstPad *srcpad = state->srcpads_[i];\n> \t\tconst StreamConfiguration &stream_cfg = state->config_->at(i);\n> -\t\tGstBufferPool *video_pool = NULL;\n> +\t\tGstBufferPool *video_pool = nullptr;\n> \t\tGstVideoInfo info;\n> \n> \t\tg_autoptr(GstCaps) caps = gst_libcamera_stream_configuration_to_caps(stream_cfg, transfer[i]);\n> @@ -1065,7 +1066,7 @@ 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> +\tg_autoptr(GstPad) pad = nullptr;\n> \n> \tGST_DEBUG_OBJECT(self, \"new request pad created\");\n> \n> @@ -1079,7 +1080,7 @@ gst_libcamera_src_request_new_pad(GstElement *element, GstPadTemplate *templ,\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\treturn nullptr;\n> \t}\n> \n> \tgst_child_proxy_child_added(GST_CHILD_PROXY(self), G_OBJECT(pad), GST_OBJECT_NAME(pad));","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 01CBDC3237\n\tfor ;\n\tWed, 4 Jun 2025 13:23:51 +0000 (UTC)","from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id A6AA168DBD;\n\tWed, 4 Jun 2025 15:23:51 +0200 (CEST)","from perceval.ideasonboard.com (perceval.ideasonboard.com\n\t[IPv6:2001:4b98:dc2:55:216:3eff:fef7:d647])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id 0D95E68DA8\n\tfor ;\n\tWed, 4 Jun 2025 15:23:50 +0200 (CEST)","from [192.168.33.16] (185.182.214.22.nat.pool.zt.hu\n\t[185.182.214.22])\n\tby perceval.ideasonboard.com (Postfix) with ESMTPSA id D05A778C;\n\tWed, 4 Jun 2025 15:23:46 +0200 (CEST)"],"Authentication-Results":"lancelot.ideasonboard.com; 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charset=UTF-8; format=flowed","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\" "}},{"id":34432,"web_url":"https://patchwork.libcamera.org/comment/34432/","msgid":"","date":"2025-06-05T12:53:18","subject":"Re: [PATCH v2 7/7] gstreamer: Replace NULL with nullptr","submitter":{"id":31,"url":"https://patchwork.libcamera.org/api/people/31/","name":"Nicolas Dufresne","email":"nicolas.dufresne@collabora.com"},"content":"Le mercredi 04 juin 2025 à 15:23 +0200, Barnabás Pőcze a écrit :\n> Hi\n> \n> 2025. 06. 04. 15:07 keltezéssel, Laurent Pinchart írta:\n> > Usage of NULL has slowly crept in the libcamerasrc sources. Replace it\n> > with nullptr.\n> \n> I think we should set up clang-tidy in the CI. It has:\n> https://clang.llvm.org/extra/clang-tidy/checks/modernize/use-nullptr.html\n> and many more useful things. Unfortunately every time I run it I am faced\n> with the fact that it runs quite slowly when using a number of checks, so\n> it would probably have to be limited to the changed source files.\n> \n> Reviewed-by: Barnabás Pőcze \n\nReported-by: Nicolas Dufresne \nReviewed-by: Nicolas Dufresne \n\ncheers,\nNicolas\n> \n> \n> > \n> > Signed-off-by: Laurent Pinchart \n> > ---\n> >   src/gstreamer/gstlibcamera-controls.cpp.in |  2 +-\n> >   src/gstreamer/gstlibcamerapad.cpp          |  2 +-\n> >   src/gstreamer/gstlibcamerasrc.cpp          | 23 +++++++++++-----------\n> >   3 files changed, 14 insertions(+), 13 deletions(-)\n> > \n> > diff --git a/src/gstreamer/gstlibcamera-controls.cpp.in b/src/gstreamer/gstlibcamera-controls.cpp.in\n> > index 89c530da0b4a..2a16b39a93d9 100644\n> > --- a/src/gstreamer/gstlibcamera-controls.cpp.in\n> > +++ b/src/gstreamer/gstlibcamera-controls.cpp.in\n> > @@ -68,7 +68,7 @@ static const GEnumValue {{ ctrl.name|snake_case }}_types[] = {\n> >   \t\t\"{{ enum.gst_name }}\"\n> >   \t},\n> >   {%- endfor %}\n> > -\t{0, NULL, NULL}\n> > +\t{0, nullptr, nullptr}\n> >   };\n> >   \n> >   #define TYPE_{{ ctrl.name|snake_case|upper }} \\\n> > diff --git a/src/gstreamer/gstlibcamerapad.cpp b/src/gstreamer/gstlibcamerapad.cpp\n> > index 3bc2bc87e773..81a0ef44cc6f 100644\n> > --- a/src/gstreamer/gstlibcamerapad.cpp\n> > +++ b/src/gstreamer/gstlibcamerapad.cpp\n> > @@ -102,7 +102,7 @@ gst_libcamera_stream_role_get_type()\n> >   \t\t\t\"libcamera::Viewfinder\",\n> >   \t\t\t\"view-finder\",\n> >   \t\t},\n> > -\t\t{ 0, NULL, NULL }\n> > +\t\t{ 0, nullptr, nullptr }\n> >   \t};\n> >   \n> >   \tif (!type)\n> > diff --git a/src/gstreamer/gstlibcamerasrc.cpp b/src/gstreamer/gstlibcamerasrc.cpp\n> > index eec8163e88e7..16b1d08b3053 100644\n> > --- a/src/gstreamer/gstlibcamerasrc.cpp\n> > +++ b/src/gstreamer/gstlibcamerasrc.cpp\n> > @@ -367,10 +367,10 @@ int GstLibcameraSrcState::processRequest()\n> >   \n> >   \t\tif (video_pool) {\n> >   \t\t\t/* Only set video pool when a copy is needed. */\n> > -\t\t\tGstBuffer *copy = NULL;\n> > +\t\t\tGstBuffer *copy = nullptr;\n> >   \t\t\tconst GstVideoInfo info = gst_libcamera_pad_get_video_info(srcpad);\n> >   \n> > -\t\t\tret = gst_buffer_pool_acquire_buffer(video_pool, ©, NULL);\n> > +\t\t\tret = gst_buffer_pool_acquire_buffer(video_pool, ©, nullptr);\n> >   \t\t\tif (ret != GST_FLOW_OK) {\n> >   \t\t\t\tgst_buffer_unref(buffer);\n> >   \t\t\t\tGST_ELEMENT_ERROR(src_, RESOURCE, SETTINGS,\n> > @@ -541,8 +541,8 @@ static std::tuple\n> >   gst_libcamera_create_video_pool(GstLibcameraSrc *self, GstPad *srcpad,\n> >   \t\t\t\tGstCaps *caps, const GstVideoInfo *info)\n> >   {\n> > -\tg_autoptr(GstQuery) query = NULL;\n> > -\tg_autoptr(GstBufferPool) pool = NULL;\n> > +\tg_autoptr(GstQuery) query = nullptr;\n> > +\tg_autoptr(GstBufferPool) pool = nullptr;\n> >   \tconst gboolean need_pool = true;\n> >   \n> >   \t/*\n> > @@ -554,8 +554,8 @@ gst_libcamera_create_video_pool(GstLibcameraSrc *self, GstPad *srcpad,\n> >   \n> >   \tif (!gst_pad_peer_query(srcpad, query))\n> >   \t\tGST_DEBUG_OBJECT(self, \"Didn't get downstream ALLOCATION hints\");\n> > -\telse if (gst_query_find_allocation_meta(query, GST_VIDEO_META_API_TYPE, NULL))\n> > -\t\treturn { NULL, 0 };\n> > +\telse if (gst_query_find_allocation_meta(query, GST_VIDEO_META_API_TYPE, nullptr))\n> > +\t\treturn { nullptr, 0 };\n> >   \n> >   \tGST_WARNING_OBJECT(self, \"Downstream doesn't support video meta, need to copy frame.\");\n> >   \n> > @@ -564,7 +564,8 @@ gst_libcamera_create_video_pool(GstLibcameraSrc *self, GstPad *srcpad,\n> >   \t * create a new pool.\n> >   \t */\n> >   \tif (gst_query_get_n_allocation_pools(query) > 0)\n> > -\t\tgst_query_parse_nth_allocation_pool(query, 0, &pool, NULL, NULL, NULL);\n> > +\t\tgst_query_parse_nth_allocation_pool(query, 0, &pool, nullptr,\n> > +\t\t\t\t\t\t    nullptr, nullptr);\n> >   \n> >   \tif (!pool) {\n> >   \t\tGstStructure *config;\n> > @@ -583,7 +584,7 @@ gst_libcamera_create_video_pool(GstLibcameraSrc *self, GstPad *srcpad,\n> >   \t\tGST_ELEMENT_ERROR(self, RESOURCE, SETTINGS,\n> >   \t\t\t\t  (\"Failed to active buffer pool\"),\n> >   \t\t\t\t  (\"gst_libcamera_src_negotiate() failed.\"));\n> > -\t\treturn { NULL, -EINVAL };\n> > +\t\treturn { nullptr, -EINVAL };\n> >   \t}\n> >   \n> >   \treturn { reinterpret_cast(g_steal_pointer(&pool)), 0 };\n> > @@ -660,7 +661,7 @@ gst_libcamera_src_negotiate(GstLibcameraSrc *self)\n> >   \tfor (gsize i = 0; i < state->srcpads_.size(); i++) {\n> >   \t\tGstPad *srcpad = state->srcpads_[i];\n> >   \t\tconst StreamConfiguration &stream_cfg = state->config_->at(i);\n> > -\t\tGstBufferPool *video_pool = NULL;\n> > +\t\tGstBufferPool *video_pool = nullptr;\n> >   \t\tGstVideoInfo info;\n> >   \n> >   \t\tg_autoptr(GstCaps) caps = gst_libcamera_stream_configuration_to_caps(stream_cfg, transfer[i]);\n> > @@ -1065,7 +1066,7 @@ 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> > +\tg_autoptr(GstPad) pad = nullptr;\n> >   \n> >   \tGST_DEBUG_OBJECT(self, \"new request pad created\");\n> >   \n> > @@ -1079,7 +1080,7 @@ gst_libcamera_src_request_new_pad(GstElement *element, GstPadTemplate *templ,\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\treturn nullptr;\n> >   \t}\n> >   \n> >   \tgst_child_proxy_child_added(GST_CHILD_PROXY(self), G_OBJECT(pad), GST_OBJECT_NAME(pad));","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 D733AC31E9\n\tfor ;\n\tThu, 5 Jun 2025 12:53:23 +0000 (UTC)","from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id 6100568DBD;\n\tThu, 5 Jun 2025 14:53:22 +0200 (CEST)","from bali.collaboradmins.com (bali.collaboradmins.com\n\t[148.251.105.195])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id D211868D96\n\tfor ;\n\tThu, 5 Jun 2025 14:53:20 +0200 (CEST)","from [IPv6:2606:6d00:10:5285::5ac] (unknown\n\t[IPv6:2606:6d00:10:5285::5ac])\n\t(using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)\n\tkey-exchange X25519 server-signature RSA-PSS (4096 bits)\n\tserver-digest SHA256)\n\t(No client certificate requested) (Authenticated sender: nicolas)\n\tby bali.collaboradmins.com (Postfix) with ESMTPSA id 88DBA17E02B0;\n\tThu, 5 Jun 2025 14:53:19 +0200 (CEST)"],"Authentication-Results":"lancelot.ideasonboard.com; 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