{"id":24763,"url":"https://patchwork.libcamera.org/api/patches/24763/?format=json","web_url":"https://patchwork.libcamera.org/patch/24763/","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":"<20251023145139.1085153-1-barnabas.pocze@ideasonboard.com>","date":"2025-10-23T14:51:39","name":"[v1] apps: cam: sdl_texture: Support NV21","commit_ref":null,"pull_url":null,"state":"accepted","archived":false,"hash":"6cbbedd12ecdcdb1c08e700dc479bb735ae0dac2","submitter":{"id":216,"url":"https://patchwork.libcamera.org/api/people/216/?format=json","name":"Barnabás Pőcze","email":"barnabas.pocze@ideasonboard.com"},"delegate":null,"mbox":"https://patchwork.libcamera.org/patch/24763/mbox/","series":[{"id":5521,"url":"https://patchwork.libcamera.org/api/series/5521/?format=json","web_url":"https://patchwork.libcamera.org/project/libcamera/list/?series=5521","date":"2025-10-23T14:51:39","name":"[v1] apps: cam: sdl_texture: Support NV21","version":1,"mbox":"https://patchwork.libcamera.org/series/5521/mbox/"}],"comments":"https://patchwork.libcamera.org/api/patches/24763/comments/","check":"pending","checks":"https://patchwork.libcamera.org/api/patches/24763/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 11248C3259\n\tfor ;\n\tThu, 23 Oct 2025 14:51:44 +0000 (UTC)","from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id A4CE860865;\n\tThu, 23 Oct 2025 16:51:44 +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 DF2E36080F\n\tfor ;\n\tThu, 23 Oct 2025 16:51:42 +0200 (CEST)","from pb-laptop.local (185.221.141.231.nat.pool.zt.hu\n\t[185.221.141.231])\n\tby perceval.ideasonboard.com (Postfix) with ESMTPSA id EBAFC591\n\tfor ;\n\tThu, 23 Oct 2025 16:49:57 +0200 (CEST)"],"Authentication-Results":"lancelot.ideasonboard.com; dkim=pass (1024-bit key;\n\tunprotected) header.d=ideasonboard.com header.i=@ideasonboard.com\n\theader.b=\"u9OT4BQa\"; dkim-atps=neutral","DKIM-Signature":"v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com;\n\ts=mail; t=1761230998;\n\tbh=b9n1HKHgfMtNk3fwihAZ+MZFd4u7OzRyUZuq0+/h50s=;\n\th=From:To:Subject:Date:From;\n\tb=u9OT4BQa9bugQegn+9rp4affIORSUXPFOlx1akBuaf7EOXQQoBPmdcIwsgaxxcQ9d\n\tMjtLdRx6oDuzPj2IiUBRHIYMa50A/e9HU5LQYlfwRtbT1C06roS0dZLJIqs+rMDIID\n\tgH/sC1qXwZRUEPtVVqtE6CWKc6fJKDzK+WOzqNd4=","From":"=?utf-8?q?Barnab=C3=A1s_P=C5=91cze?= ","To":"libcamera-devel@lists.libcamera.org","Subject":"[PATCH v1] apps: cam: sdl_texture: Support NV21","Date":"Thu, 23 Oct 2025 16:51:39 +0200","Message-ID":"<20251023145139.1085153-1-barnabas.pocze@ideasonboard.com>","X-Mailer":"git-send-email 2.51.1.dirty","MIME-Version":"1.0","Content-Type":"text/plain; charset=UTF-8","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":"SDL also supports NV21 with the same `SDL_UpdateNVTexture()`,\nso add support for it.\n\nSigned-off-by: Barnabás Pőcze \n---\n src/apps/cam/sdl_sink.cpp | 4 +++-\n src/apps/cam/sdl_texture_yuv.cpp | 13 +++++++++----\n src/apps/cam/sdl_texture_yuv.h | 4 ++--\n 3 files changed, 14 insertions(+), 7 deletions(-)","diff":"diff --git a/src/apps/cam/sdl_sink.cpp b/src/apps/cam/sdl_sink.cpp\nindex 30cfdf0af..17a9e04b5 100644\n--- a/src/apps/cam/sdl_sink.cpp\n+++ b/src/apps/cam/sdl_sink.cpp\n@@ -112,7 +112,9 @@ int SDLSink::configure(const libcamera::CameraConfiguration &config)\n #endif\n #if SDL_VERSION_ATLEAST(2, 0, 16)\n \telse if (cfg.pixelFormat == libcamera::formats::NV12)\n-\t\ttexture_ = std::make_unique(rect_, cfg.stride);\n+\t\ttexture_ = std::make_unique(rect_, SDL_PIXELFORMAT_NV12, cfg.stride);\n+\telse if (cfg.pixelFormat == libcamera::formats::NV21)\n+\t\ttexture_ = std::make_unique(rect_, SDL_PIXELFORMAT_NV21, cfg.stride);\n #endif\n \telse {\n \t\tstd::cerr << \"Unsupported pixel format \" << cfg.pixelFormat << std::endl;\ndiff --git a/src/apps/cam/sdl_texture_yuv.cpp b/src/apps/cam/sdl_texture_yuv.cpp\nindex bed297d28..40d1a3ae9 100644\n--- a/src/apps/cam/sdl_texture_yuv.cpp\n+++ b/src/apps/cam/sdl_texture_yuv.cpp\n@@ -7,16 +7,21 @@\n \n #include \"sdl_texture_yuv.h\"\n \n-using namespace libcamera;\n+#include \n \n #if SDL_VERSION_ATLEAST(2, 0, 16)\n-SDLTextureNV12::SDLTextureNV12(const SDL_Rect &rect, unsigned int stride)\n-\t: SDLTexture(rect, SDL_PIXELFORMAT_NV12, stride)\n+SDLTextureNV::SDLTextureNV(const SDL_Rect &rect, uint32_t pixelFormat, unsigned int stride)\n+\t: SDLTexture(rect, pixelFormat, stride)\n {\n+\tassert(pixelFormat == SDL_PIXELFORMAT_NV12 || pixelFormat == SDL_PIXELFORMAT_NV21);\n }\n \n-void SDLTextureNV12::update(libcamera::Span> data)\n+void SDLTextureNV::update(libcamera::Span> data)\n {\n+\tassert(data.size() == 2);\n+\tassert(data[0].size_bytes() == std::size_t(rect_.h) * std::size_t(stride_));\n+\tassert(data[1].size_bytes() == std::size_t(rect_.h) * std::size_t(stride_) / 2);\n+\n \tSDL_UpdateNVTexture(ptr_, nullptr, data[0].data(), stride_,\n \t\t\t data[1].data(), stride_);\n }\ndiff --git a/src/apps/cam/sdl_texture_yuv.h b/src/apps/cam/sdl_texture_yuv.h\nindex c271f901b..8e73506d1 100644\n--- a/src/apps/cam/sdl_texture_yuv.h\n+++ b/src/apps/cam/sdl_texture_yuv.h\n@@ -10,10 +10,10 @@\n #include \"sdl_texture.h\"\n \n #if SDL_VERSION_ATLEAST(2, 0, 16)\n-class SDLTextureNV12 : public SDLTexture\n+class SDLTextureNV final : public SDLTexture\n {\n public:\n-\tSDLTextureNV12(const SDL_Rect &rect, unsigned int stride);\n+\tSDLTextureNV(const SDL_Rect &rect, uint32_t pixelFormat, unsigned int stride);\n \tvoid update(libcamera::Span> data) override;\n };\n #endif\n","prefixes":["v1"]}