{"id":22330,"url":"https://patchwork.libcamera.org/api/1.1/patches/22330/?format=json","web_url":"https://patchwork.libcamera.org/patch/22330/","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":"<20241216043044.1760345-1-qi.hou@nxp.com>","date":"2024-12-16T04:30:44","name":"[v4] gstreamer: keep same transfer with that in negotiated caps","commit_ref":"e9a876acc6d3a3d8ce1cfc99e4cbcf1c6122d591","pull_url":null,"state":"accepted","archived":false,"hash":"b2c8d9dc455409b9b4aa41121f54037ed503ca33","submitter":{"id":195,"url":"https://patchwork.libcamera.org/api/1.1/people/195/?format=json","name":"Qi Hou","email":"qi.hou@nxp.com"},"delegate":null,"mbox":"https://patchwork.libcamera.org/patch/22330/mbox/","series":[{"id":4891,"url":"https://patchwork.libcamera.org/api/1.1/series/4891/?format=json","web_url":"https://patchwork.libcamera.org/project/libcamera/list/?series=4891","date":"2024-12-16T04:30:44","name":"[v4] gstreamer: keep same transfer with that in negotiated caps","version":4,"mbox":"https://patchwork.libcamera.org/series/4891/mbox/"}],"comments":"https://patchwork.libcamera.org/api/patches/22330/comments/","check":"pending","checks":"https://patchwork.libcamera.org/api/patches/22330/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 5586FC32F9\n\tfor ;\n\tMon, 16 Dec 2024 04:31:12 +0000 (UTC)","from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id 7A10162C8A;\n\tMon, 16 Dec 2024 05:31:11 +0100 (CET)","from AM0PR83CU005.outbound.protection.outlook.com\n\t(mail-westeuropeazlp170100000.outbound.protection.outlook.com\n\t[IPv6:2a01:111:f403:c201::])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id 1A22F62C8A\n\tfor ;\n\tMon, 16 Dec 2024 05:31:09 +0100 (CET)","from PAXPR04MB8285.eurprd04.prod.outlook.com\n\t(2603:10a6:102:1ca::15)\n\tby GVXPR04MB9949.eurprd04.prod.outlook.com (2603:10a6:150:112::5)\n\twith Microsoft SMTP Server (version=TLS1_2,\n\tcipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.8251.21;\n\tMon, 16 Dec 2024 04:31:07 +0000","from PAXPR04MB8285.eurprd04.prod.outlook.com\n\t([fe80::e003:8fb:64ea:acfd]) by\n\tPAXPR04MB8285.eurprd04.prod.outlook.com\n\t([fe80::e003:8fb:64ea:acfd%6]) with mapi id 15.20.8251.015;\n\tMon, 16 Dec 2024 04:31:07 +0000"],"Authentication-Results":["lancelot.ideasonboard.com; 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This\ncauses negotiation error when the downstream element explicitly\nexpects bt601 colorimetry.\n\nMinimal example to reproduce the issue is with a pipeline handler\nthat do not set the optional color space in the stream configuration,\nfor instance vimc or imx8-isi:\nexport LIBCAMERA_PIPELINES_MATCH_LIST=\"vimc,imx8-isi\"\ngst-launch-1.0 -v libcamerasrc ! video/x-raw,colorimetry=bt601 ! fakesink\n\nAbove pipeline fails to start. This change memorizes downstream required\ntransfer function when mapped libcamera transfer is Rec709 in\ngst_libcamera_configure_stream_from_caps(), and restores the transfer\nfunction in gst_libcamera_stream_formats_to_caps().\n\n[1] https://gitlab.freedesktop.org/gstreamer/gst-plugins-base/-/merge_requests/724\n\nBug: https://bugs.libcamera.org/show_bug.cgi?id=150\nSigned-off-by: Hou Qi \n---\n src/gstreamer/gstlibcamera-utils.cpp | 20 ++++++++++++--------\n src/gstreamer/gstlibcamera-utils.h | 5 +++--\n src/gstreamer/gstlibcamerasrc.cpp | 6 ++++--\n 3 files changed, 19 insertions(+), 12 deletions(-)","diff":"diff --git a/src/gstreamer/gstlibcamera-utils.cpp b/src/gstreamer/gstlibcamera-utils.cpp\nindex 732987ef..a466b305 100644\n--- a/src/gstreamer/gstlibcamera-utils.cpp\n+++ b/src/gstreamer/gstlibcamera-utils.cpp\n@@ -85,7 +85,7 @@ static struct {\n };\n \n static GstVideoColorimetry\n-colorimetry_from_colorspace(const ColorSpace &colorSpace)\n+colorimetry_from_colorspace(const ColorSpace &colorSpace, GstVideoTransferFunction transfer)\n {\n \tGstVideoColorimetry colorimetry;\n \n@@ -113,6 +113,8 @@ colorimetry_from_colorspace(const ColorSpace &colorSpace)\n \t\tbreak;\n \tcase ColorSpace::TransferFunction::Rec709:\n \t\tcolorimetry.transfer = GST_VIDEO_TRANSFER_BT709;\n+\t\tif (transfer != GST_VIDEO_TRANSFER_UNKNOWN)\n+\t\t\tcolorimetry.transfer = transfer;\n \t\tbreak;\n \t}\n \n@@ -144,7 +146,8 @@ colorimetry_from_colorspace(const ColorSpace &colorSpace)\n }\n \n static std::optional\n-colorspace_from_colorimetry(const GstVideoColorimetry &colorimetry)\n+colorspace_from_colorimetry(const GstVideoColorimetry &colorimetry,\n+\t\t\t GstVideoTransferFunction *transfer)\n {\n \tstd::optional colorspace = ColorSpace::Raw;\n \n@@ -188,6 +191,7 @@ colorspace_from_colorimetry(const GstVideoColorimetry &colorimetry)\n \tcase GST_VIDEO_TRANSFER_BT2020_12:\n \tcase GST_VIDEO_TRANSFER_BT709:\n \t\tcolorspace->transferFunction = ColorSpace::TransferFunction::Rec709;\n+\t\t*transfer = colorimetry.transfer;\n \t\tbreak;\n \tdefault:\n \t\tGST_WARNING(\"Colorimetry transfer function %d not mapped in gstlibcamera\",\n@@ -379,7 +383,8 @@ gst_libcamera_stream_formats_to_caps(const StreamFormats &formats)\n }\n \n GstCaps *\n-gst_libcamera_stream_configuration_to_caps(const StreamConfiguration &stream_cfg)\n+gst_libcamera_stream_configuration_to_caps(const StreamConfiguration &stream_cfg,\n+\t\t\t\t\t GstVideoTransferFunction transfer)\n {\n \tGstCaps *caps = gst_caps_new_empty();\n \tGstStructure *s = bare_structure_from_format(stream_cfg.pixelFormat);\n@@ -390,7 +395,7 @@ gst_libcamera_stream_configuration_to_caps(const StreamConfiguration &stream_cfg\n \t\t\t nullptr);\n \n \tif (stream_cfg.colorSpace) {\n-\t\tGstVideoColorimetry colorimetry = colorimetry_from_colorspace(stream_cfg.colorSpace.value());\n+\t\tGstVideoColorimetry colorimetry = colorimetry_from_colorspace(stream_cfg.colorSpace.value(), transfer);\n \t\tg_autofree gchar *colorimetry_str = gst_video_colorimetry_to_string(&colorimetry);\n \n \t\tif (colorimetry_str)\n@@ -405,9 +410,8 @@ gst_libcamera_stream_configuration_to_caps(const StreamConfiguration &stream_cfg\n \treturn caps;\n }\n \n-void\n-gst_libcamera_configure_stream_from_caps(StreamConfiguration &stream_cfg,\n-\t\t\t\t\t GstCaps *caps)\n+void gst_libcamera_configure_stream_from_caps(StreamConfiguration &stream_cfg,\n+\t\t\t\t\t GstCaps *caps, GstVideoTransferFunction *transfer)\n {\n \tGstVideoFormat gst_format = pixel_format_to_gst_format(stream_cfg.pixelFormat);\n \tguint i;\n@@ -495,7 +499,7 @@ gst_libcamera_configure_stream_from_caps(StreamConfiguration &stream_cfg,\n \t\tif (!gst_video_colorimetry_from_string(&colorimetry, colorimetry_str))\n \t\t\tg_critical(\"Invalid colorimetry %s\", colorimetry_str);\n \n-\t\tstream_cfg.colorSpace = colorspace_from_colorimetry(colorimetry);\n+\t\tstream_cfg.colorSpace = colorspace_from_colorimetry(colorimetry, transfer);\n \t}\n }\n \ndiff --git a/src/gstreamer/gstlibcamera-utils.h b/src/gstreamer/gstlibcamera-utils.h\nindex cab1c814..4978987c 100644\n--- a/src/gstreamer/gstlibcamera-utils.h\n+++ b/src/gstreamer/gstlibcamera-utils.h\n@@ -16,9 +16,10 @@\n #include \n \n GstCaps *gst_libcamera_stream_formats_to_caps(const libcamera::StreamFormats &formats);\n-GstCaps *gst_libcamera_stream_configuration_to_caps(const libcamera::StreamConfiguration &stream_cfg);\n+GstCaps *gst_libcamera_stream_configuration_to_caps(const libcamera::StreamConfiguration &stream_cfg,\n+\t\t\t\t\t\t GstVideoTransferFunction transfer);\n void gst_libcamera_configure_stream_from_caps(libcamera::StreamConfiguration &stream_cfg,\n-\t\t\t\t\t GstCaps *caps);\n+\t\t\t\t\t GstCaps *caps, GstVideoTransferFunction *transfer);\n void gst_libcamera_get_framerate_from_caps(GstCaps *caps, GstStructure *element_caps);\n void gst_libcamera_clamp_and_set_frameduration(libcamera::ControlList &controls,\n \t\t\t\t\t const libcamera::ControlInfoMap &camera_controls,\ndiff --git a/src/gstreamer/gstlibcamerasrc.cpp b/src/gstreamer/gstlibcamerasrc.cpp\nindex 8efa25f4..5e9e843d 100644\n--- a/src/gstreamer/gstlibcamerasrc.cpp\n+++ b/src/gstreamer/gstlibcamerasrc.cpp\n@@ -433,6 +433,8 @@ static bool\n gst_libcamera_src_negotiate(GstLibcameraSrc *self)\n {\n \tGstLibcameraSrcState *state = self->state;\n+\tstd::vector transfer(state->srcpads_.size(),\n+\t\t\t\t\t\t GST_VIDEO_TRANSFER_UNKNOWN);\n \n \tg_autoptr(GstStructure) element_caps = gst_structure_new_empty(\"caps\");\n \n@@ -448,7 +450,7 @@ gst_libcamera_src_negotiate(GstLibcameraSrc *self)\n \n \t\t/* Fixate caps and configure the stream. */\n \t\tcaps = gst_caps_make_writable(caps);\n-\t\tgst_libcamera_configure_stream_from_caps(stream_cfg, caps);\n+\t\tgst_libcamera_configure_stream_from_caps(stream_cfg, caps, &transfer[i]);\n \t\tgst_libcamera_get_framerate_from_caps(caps, element_caps);\n \t}\n \n@@ -476,7 +478,7 @@ gst_libcamera_src_negotiate(GstLibcameraSrc *self)\n \t\tGstPad *srcpad = state->srcpads_[i];\n \t\tconst StreamConfiguration &stream_cfg = state->config_->at(i);\n \n-\t\tg_autoptr(GstCaps) caps = gst_libcamera_stream_configuration_to_caps(stream_cfg);\n+\t\tg_autoptr(GstCaps) caps = gst_libcamera_stream_configuration_to_caps(stream_cfg, transfer[i]);\n \t\tgst_libcamera_framerate_to_caps(caps, element_caps);\n \n \t\tif (!gst_pad_push_event(srcpad, gst_event_new_caps(caps)))\n","prefixes":["v4"]}