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{ "id": 26095, "url": "https://patchwork.libcamera.org/api/patches/26095/?format=api", "web_url": "https://patchwork.libcamera.org/patch/26095/", "project": { "id": 1, "url": "https://patchwork.libcamera.org/api/projects/1/?format=api", "name": "libcamera", "link_name": "libcamera", "list_id": "libcamera_core", "list_email": "libcamera-devel@lists.libcamera.org", "web_url": "", "scm_url": "", "webscm_url": "" }, "msgid": "<20260205102156.2591211-1-barnabas.pocze@ideasonboard.com>", "date": "2026-02-05T10:21:56", "name": "[v2] libcamera: software_isp: debayer: Take `DebayerParams` by ref", "commit_ref": null, "pull_url": null, "state": "accepted", "archived": false, "hash": "46ac5cbec4c4100462392db90cb214d35e9147a3", "submitter": { "id": 216, "url": "https://patchwork.libcamera.org/api/people/216/?format=api", "name": "Barnabás Pőcze", "email": "barnabas.pocze@ideasonboard.com" }, "delegate": null, "mbox": "https://patchwork.libcamera.org/patch/26095/mbox/", "series": [ { "id": 5773, "url": "https://patchwork.libcamera.org/api/series/5773/?format=api", "web_url": "https://patchwork.libcamera.org/project/libcamera/list/?series=5773", "date": "2026-02-05T10:21:56", "name": "[v2] libcamera: software_isp: debayer: Take `DebayerParams` by ref", "version": 2, "mbox": "https://patchwork.libcamera.org/series/5773/mbox/" } ], "comments": "https://patchwork.libcamera.org/api/patches/26095/comments/", "check": "pending", "checks": "https://patchwork.libcamera.org/api/patches/26095/checks/", "tags": {}, "headers": { "Return-Path": "<libcamera-devel-bounces@lists.libcamera.org>", "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 BACBABD78E\n\tfor <parsemail@patchwork.libcamera.org>;\n\tThu, 5 Feb 2026 10:22:01 +0000 (UTC)", "from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id 9F3626204A;\n\tThu, 5 Feb 2026 11:22:00 +0100 (CET)", "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 924D361F84\n\tfor <libcamera-devel@lists.libcamera.org>;\n\tThu, 5 Feb 2026 11:21:59 +0100 (CET)", "from pb-laptop.local (185.221.141.206.nat.pool.zt.hu\n\t[185.221.141.206])\n\tby perceval.ideasonboard.com (Postfix) with ESMTPSA id 997DD227;\n\tThu, 5 Feb 2026 11:21:16 +0100 (CET)" ], "Authentication-Results": "lancelot.ideasonboard.com; dkim=pass (1024-bit key;\n\tunprotected) header.d=ideasonboard.com header.i=@ideasonboard.com\n\theader.b=\"Ajg4tIBU\"; dkim-atps=neutral", "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com;\n\ts=mail; t=1770286876;\n\tbh=GmACjKMWOcU7DXqghEumcezcd6/Hz8hixTfyzHOU79g=;\n\th=From:To:Cc:Subject:Date:From;\n\tb=Ajg4tIBUARE3wq5kby6qY8D5FYdXjKDo80iw68hl8KkOwNejeL3qIK3DWRlNp8z1J\n\tYZkt+oxFPYGJqialJthykwgC3J2OB8vbaOtbPbNh/Gg+Vl43ieW0JyFAw7GokbqvjQ\n\tGBsNWp7mLIQ/4QTBvf807AdqeSfGF71ItxEbU9Lc=", "From": "=?utf-8?q?Barnab=C3=A1s_P=C5=91cze?= <barnabas.pocze@ideasonboard.com>", "To": "libcamera-devel@lists.libcamera.org", "Cc": "Milan Zamazal <mzamazal@redhat.com>,\n\tBryan O'Donoghue <bryan.odonoghue@linaro.org>", "Subject": "[PATCH v2] libcamera: software_isp: debayer: Take `DebayerParams` by\n\tref", "Date": "Thu, 5 Feb 2026 11:21:56 +0100", "Message-ID": "<20260205102156.2591211-1-barnabas.pocze@ideasonboard.com>", "X-Mailer": "git-send-email 2.53.0", "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": "<libcamera-devel.lists.libcamera.org>", "List-Unsubscribe": "<https://lists.libcamera.org/options/libcamera-devel>,\n\t<mailto:libcamera-devel-request@lists.libcamera.org?subject=unsubscribe>", "List-Archive": "<https://lists.libcamera.org/pipermail/libcamera-devel/>", "List-Post": "<mailto:libcamera-devel@lists.libcamera.org>", "List-Help": "<mailto:libcamera-devel-request@lists.libcamera.org?subject=help>", "List-Subscribe": "<https://lists.libcamera.org/listinfo/libcamera-devel>,\n\t<mailto:libcamera-devel-request@lists.libcamera.org?subject=subscribe>", "Errors-To": "libcamera-devel-bounces@lists.libcamera.org", "Sender": "\"libcamera-devel\" <libcamera-devel-bounces@lists.libcamera.org>" }, "content": "When calling `Debayer::process()` from `SoftwareIsp::process()`, the\n`DebayerParams` object is copied multiple times:\n\n (1) call of `BoundMethodMember<...>::activate()`\n inside `Object::invokeMethod()`\n (2) constructor of `BoundMethodArgs<...>`\n inside `BoundMethodMember<...>::activate()`\n (3) call of `BoundMethodMember<...>::invoke()`\n inside `BoundMethodArgs::invokePack()`\n (4) call of the actual pointer to member function\n inside `BoundMethodMember::invoke()`\n\nWhile compilers might avoid one or two of the above copies, this is still\nnot ideal. By making `Debayer::process()` take the parameter object by\nconst lvalue reference, only the copy in the `BoundMethodArgs` constructor\nremains. So do that.\n\nBefore:\n\t[0:12:51.133836595] [12424] DEBUG SoftwareIsp software_isp.cpp:399 params=0x7d0a691f57d0\n\tcopy from 0x7d0a691f57d0 into 0x7baa65f2bf30\n\tcopy from 0x7baa65f2bf30 into 0x7c6a69209758\n\tcopy from 0x7c6a69209758 into 0x7baa63223930\n\tcopy from 0x7baa63223930 into 0x7baa63223a70\n\t[0:12:51.134559602] [12426] DEBUG eGL debayer_egl.cpp:538 params=0x7baa63223a70\n\t771.099877 (30.06 fps) cam0-stream0 seq: 000031 bytesused: 8666112\n\nAfter:\n\t[0:13:42.861691943] [12543] DEBUG SoftwareIsp software_isp.cpp:399 params=0x7cfaad5f57d0\n\tcopy from 0x7cfaad5f57d0 into 0x7c5aad609758\n\t[0:13:42.862453917] [12545] DEBUG eGL debayer_egl.cpp:538 params=0x7c5aad609758\n\t822.827388 (30.02 fps) cam0-stream0 seq: 000031 bytesused: 8666112\n\nSigned-off-by: Barnabás Pőcze <barnabas.pocze@ideasonboard.com>\nReviewed-by: Milan Zamazal <mzamazal@redhat.com>\nReviewed-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>\n---\nchanges in v2:\n * rebase\n * reword and extend commit message\n\nv1: https://patchwork.libcamera.org/patch/25898/\n---\n src/libcamera/software_isp/debayer.h | 2 +-\n src/libcamera/software_isp/debayer_cpu.cpp | 6 +++---\n src/libcamera/software_isp/debayer_cpu.h | 6 +++---\n src/libcamera/software_isp/debayer_egl.cpp | 6 +++---\n src/libcamera/software_isp/debayer_egl.h | 6 +++---\n 5 files changed, 13 insertions(+), 13 deletions(-)\n\n--\n2.53.0", "diff": "diff --git a/src/libcamera/software_isp/debayer.h b/src/libcamera/software_isp/debayer.h\nindex 652cff4cc..ce9350b7b 100644\n--- a/src/libcamera/software_isp/debayer.h\n+++ b/src/libcamera/software_isp/debayer.h\n@@ -47,7 +47,7 @@ public:\n \tvirtual std::tuple<unsigned int, unsigned int>\n \tstrideAndFrameSize(const PixelFormat &outputFormat, const Size &size) = 0;\n\n-\tvirtual void process(uint32_t frame, FrameBuffer *input, FrameBuffer *output, DebayerParams params) = 0;\n+\tvirtual void process(uint32_t frame, FrameBuffer *input, FrameBuffer *output, const DebayerParams ¶ms) = 0;\n \tvirtual int start() { return 0; }\n \tvirtual void stop() {}\n\ndiff --git a/src/libcamera/software_isp/debayer_cpu.cpp b/src/libcamera/software_isp/debayer_cpu.cpp\nindex af7af0a8d..d09883577 100644\n--- a/src/libcamera/software_isp/debayer_cpu.cpp\n+++ b/src/libcamera/software_isp/debayer_cpu.cpp\n@@ -750,7 +750,7 @@ void DebayerCpu::process4(uint32_t frame, const uint8_t *src, uint8_t *dst)\n \t}\n }\n\n-void DebayerCpu::updateGammaTable(DebayerParams ¶ms)\n+void DebayerCpu::updateGammaTable(const DebayerParams ¶ms)\n {\n \tconst RGB<float> blackLevel = params.blackLevel;\n \t/* Take let's say the green channel black level */\n@@ -780,7 +780,7 @@ void DebayerCpu::updateGammaTable(DebayerParams ¶ms)\n \t\t gammaTable_[blackIndex]);\n }\n\n-void DebayerCpu::updateLookupTables(DebayerParams ¶ms)\n+void DebayerCpu::updateLookupTables(const DebayerParams ¶ms)\n {\n \tconst bool gammaUpdateNeeded =\n \t\tparams.gamma != params_.gamma ||\n@@ -842,7 +842,7 @@ void DebayerCpu::updateLookupTables(DebayerParams ¶ms)\n \tparams_ = params;\n }\n\n-void DebayerCpu::process(uint32_t frame, FrameBuffer *input, FrameBuffer *output, DebayerParams params)\n+void DebayerCpu::process(uint32_t frame, FrameBuffer *input, FrameBuffer *output, const DebayerParams ¶ms)\n {\n \tbench_.startFrame();\n\ndiff --git a/src/libcamera/software_isp/debayer_cpu.h b/src/libcamera/software_isp/debayer_cpu.h\nindex b5cbb5bd2..7a6517462 100644\n--- a/src/libcamera/software_isp/debayer_cpu.h\n+++ b/src/libcamera/software_isp/debayer_cpu.h\n@@ -39,7 +39,7 @@ public:\n \tstd::vector<PixelFormat> formats(PixelFormat input);\n \tstd::tuple<unsigned int, unsigned int>\n \tstrideAndFrameSize(const PixelFormat &outputFormat, const Size &size);\n-\tvoid process(uint32_t frame, FrameBuffer *input, FrameBuffer *output, DebayerParams params);\n+\tvoid process(uint32_t frame, FrameBuffer *input, FrameBuffer *output, const DebayerParams ¶ms);\n \tSizeRange sizes(PixelFormat inputFormat, const Size &inputSize);\n \tconst SharedFD &getStatsFD() { return stats_->getStatsFD(); }\n\n@@ -110,8 +110,8 @@ private:\n \tvoid memcpyNextLine(const uint8_t *linePointers[]);\n \tvoid process2(uint32_t frame, const uint8_t *src, uint8_t *dst);\n \tvoid process4(uint32_t frame, const uint8_t *src, uint8_t *dst);\n-\tvoid updateGammaTable(DebayerParams ¶ms);\n-\tvoid updateLookupTables(DebayerParams ¶ms);\n+\tvoid updateGammaTable(const DebayerParams ¶ms);\n+\tvoid updateLookupTables(const DebayerParams ¶ms);\n\n \t/* Max. supported Bayer pattern height is 4, debayering this requires 5 lines */\n \tstatic constexpr unsigned int kMaxLineBuffers = 5;\ndiff --git a/src/libcamera/software_isp/debayer_egl.cpp b/src/libcamera/software_isp/debayer_egl.cpp\nindex 4d0caa6ef..93f7c6946 100644\n--- a/src/libcamera/software_isp/debayer_egl.cpp\n+++ b/src/libcamera/software_isp/debayer_egl.cpp\n@@ -383,7 +383,7 @@ DebayerEGL::strideAndFrameSize(const PixelFormat &outputFormat, const Size &size\n \treturn std::make_tuple(stride, stride * size.height);\n }\n\n-void DebayerEGL::setShaderVariableValues(DebayerParams ¶ms)\n+void DebayerEGL::setShaderVariableValues(const DebayerParams ¶ms)\n {\n \t/*\n \t * Raw Bayer 8-bit, and packed raw Bayer 10-bit/12-bit formats\n@@ -506,7 +506,7 @@ void DebayerEGL::setShaderVariableValues(DebayerParams ¶ms)\n \treturn;\n }\n\n-int DebayerEGL::debayerGPU(MappedFrameBuffer &in, int out_fd, DebayerParams ¶ms)\n+int DebayerEGL::debayerGPU(MappedFrameBuffer &in, int out_fd, const DebayerParams ¶ms)\n {\n \t/* eGL context switch */\n \tegl_.makeCurrent();\n@@ -533,7 +533,7 @@ int DebayerEGL::debayerGPU(MappedFrameBuffer &in, int out_fd, DebayerParams &par\n \treturn 0;\n }\n\n-void DebayerEGL::process(uint32_t frame, FrameBuffer *input, FrameBuffer *output, DebayerParams params)\n+void DebayerEGL::process(uint32_t frame, FrameBuffer *input, FrameBuffer *output, const DebayerParams ¶ms)\n {\n \tbench_.startFrame();\n\ndiff --git a/src/libcamera/software_isp/debayer_egl.h b/src/libcamera/software_isp/debayer_egl.h\nindex cfbaf8e9d..59aebcc81 100644\n--- a/src/libcamera/software_isp/debayer_egl.h\n+++ b/src/libcamera/software_isp/debayer_egl.h\n@@ -50,7 +50,7 @@ public:\n \tstd::vector<PixelFormat> formats(PixelFormat input);\n \tstd::tuple<unsigned int, unsigned int> strideAndFrameSize(const PixelFormat &outputFormat, const Size &size);\n\n-\tvoid process(uint32_t frame, FrameBuffer *input, FrameBuffer *output, DebayerParams params);\n+\tvoid process(uint32_t frame, FrameBuffer *input, FrameBuffer *output, const DebayerParams ¶ms);\n \tint start();\n \tvoid stop();\n\n@@ -72,9 +72,9 @@ private:\n \t\t\t\t std::vector<std::string> shaderEnv);\n \tint linkShaderProgram(void);\n \tint getShaderVariableLocations();\n-\tvoid setShaderVariableValues(DebayerParams ¶ms);\n+\tvoid setShaderVariableValues(const DebayerParams ¶ms);\n \tvoid configureTexture(GLuint &texture);\n-\tint debayerGPU(MappedFrameBuffer &in, int out_fd, DebayerParams ¶ms);\n+\tint debayerGPU(MappedFrameBuffer &in, int out_fd, const DebayerParams ¶ms);\n\n \t/* Shader program identifiers */\n \tGLuint vertexShaderId_ = 0;\n", "prefixes": [ "v2" ] }