[{"id":32343,"web_url":"https://patchwork.libcamera.org/comment/32343/","msgid":"<1d033974-867a-4e84-9701-c620d78cc3d0@collabora.com>","date":"2024-11-24T13:41:41","subject":"Re: [RFC PATCH 0/1] Enable raw streams with software ISP","submitter":{"id":140,"url":"https://patchwork.libcamera.org/api/people/140/","name":"Robert Mader","email":"robert.mader@collabora.com"},"content":"Hi, thanks for the patch!\n\nI gave this a quick try with Millipixels \n(https://source.puri.sm/Librem5/millipixels) which uses raw streams. It \nlooks like the app will need manual adjustments to work with this patch \n- but that's kinda expected IIUC (Millipixels apparently doesn't request \nraw streams explicitly yet). It looks like other API changes on master / \nin 0.4 will require manual changes to the app anyway, so that shouldn't \nbe a big deal.\n\nDo I understand correctly that exposure and gain were never supported \nfor raw streams yet? Because in that case the patch here *is* already \nuseful for Millipixels at it would allow it to co-exist with apps \nrequiring swISP without requiring hacks like this: \nhttps://gitlab.postmarketos.org/postmarketOS/pmaports/-/blob/master/temp/libcamera/0002-libcamera-simple-Force-disable-softwareISP-for-milli.patch\n\nIn other words: even without gain/exposure I'd be happy to have this in \n0.4, especially if that allows us to enable the swISP on all platforms \nby default.\n\nOn 22.11.24 21:13, Milan Zamazal wrote:\n> This makes raw streams working again in ‘simple’ pipeline when software\n> ISP is enabled for the given device. For now, only a single raw stream\n> is supported and there are no immediate plans to change that unless\n> there is a request for more.\n>\n> An example ‘cam’ invocation requesting a raw stream rather than a debayered stream:\n>\n> cam -c1 -C8 -s role=raw,width=1920,height=1080 -Ffile#.raw\n>\n> See the commit message for more information about the patch.\n>\n> The patch is RFC because I’m not sure where it is placed on the scale\n> between a hack/PoC and a proper solution and because it’s not that\n> useful until a control for exposure/gain adjustments is implemented.\n>\n> In the meantime, fixed exposure+gain can be hardwired in\n> src/ipa/simple/soft_simple.cpp by changing the lines\n>\n> ctrls.set(V4L2_CID_EXPOSURE, …);\n> ctrls.set(V4L2_CID_ANALOGUE_GAIN, …);\n>\n> to set the desired values (values used under the given conditions can be\n> obtained from normal software ISP debayered output debug log).\n>\n> Milan Zamazal (1):\n> libcamera: simple: Fix raw output\n>\n> src/libcamera/pipeline/simple/simple.cpp | 66 +++++++++++++++++++-----\n> 1 file changed, 54 insertions(+), 12 deletions(-)\n>","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 180F6BD808\n\tfor ;\n\tSun, 24 Nov 2024 13:41:51 +0000 (UTC)","from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id 3D1F865FEA;\n\tSun, 24 Nov 2024 14:41:50 +0100 (CET)","from sender4-op-o12.zoho.com (sender4-op-o12.zoho.com\n\t[136.143.188.12])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id 472D165FC6\n\tfor ;\n\tSun, 24 Nov 2024 14:41:48 +0100 (CET)","by mx.zohomail.com with SMTPS id 1732455703817234.96159377764718; 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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":32351,"web_url":"https://patchwork.libcamera.org/comment/32351/","msgid":"<875xob7i9d.fsf@redhat.com>","date":"2024-11-25T09:52:14","subject":"Re: [RFC PATCH 0/1] Enable raw streams with software ISP","submitter":{"id":177,"url":"https://patchwork.libcamera.org/api/people/177/","name":"Milan Zamazal","email":"mzamazal@redhat.com"},"content":"Hi Laurent,\n\nLaurent Pinchart writes:\n\n> On Fri, Nov 22, 2024 at 09:13:03PM +0100, Milan Zamazal wrote:\n>> This makes raw streams working again in ‘simple’ pipeline when software\n>> ISP is enabled for the given device. For now, only a single raw stream\n>> is supported and there are no immediate plans to change that unless\n>> there is a request for more.\n>\n> Cameras don't support multiple raw streams in general. By \"only a single\n> raw stream is supported\", do you mean you can't capture raw + processed\n> ? \n\nYes.\n\n> I think that should be fixed, otherwise this sounds too much of a\n> hack.\n\nThe primary purpose of this patch is to remedy the situation that\n`simple' pipeline can produce a raw stream only when software ISP is\ndisabled in the sources for the given device. But I can further work on\nraw + processed if it solves a real problem.\n\n>> An example ‘cam’ invocation requesting a raw stream rather than a debayered stream:\n>> \n>> cam -c1 -C8 -s role=raw,width=1920,height=1080 -Ffile#.raw\n>> \n>> See the commit message for more information about the patch.\n>> \n>> The patch is RFC because I’m not sure where it is placed on the scale\n>> between a hack/PoC and a proper solution and because it’s not that\n>> useful until a control for exposure/gain adjustments is implemented.\n>> \n>> In the meantime, fixed exposure+gain can be hardwired in\n>> src/ipa/simple/soft_simple.cpp by changing the lines\n>> \n>> ctrls.set(V4L2_CID_EXPOSURE, …);\n>> ctrls.set(V4L2_CID_ANALOGUE_GAIN, …);\n>> \n>> to set the desired values (values used under the given conditions can be\n>> obtained from normal software ISP debayered output debug log).\n>> \n>> Milan Zamazal (1):\n>> libcamera: simple: Fix raw output\n>> \n>> src/libcamera/pipeline/simple/simple.cpp | 66 +++++++++++++++++++-----\n>> 1 file changed, 54 insertions(+), 12 deletions(-)","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 25B7EC32A3\n\tfor ;\n\tMon, 25 Nov 2024 09:52:23 +0000 (UTC)","from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id 7050266011;\n\tMon, 25 Nov 2024 10:52:22 +0100 (CET)","from us-smtp-delivery-124.mimecast.com\n\t(us-smtp-delivery-124.mimecast.com [170.10.129.124])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id 9F2F866008\n\tfor ;\n\tMon, 25 Nov 2024 10:52:20 +0100 (CET)","from mail-ej1-f69.google.com (mail-ej1-f69.google.com\n\t[209.85.218.69]) by relay.mimecast.com with ESMTP with STARTTLS\n\t(version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id\n\tus-mta-539-0_nSsYbNOaq0YXKwDgUZ2g-1; Mon, 25 Nov 2024 04:52:18 -0500","by mail-ej1-f69.google.com with SMTP id\n\ta640c23a62f3a-aa52bfbdfebso141519166b.3\n\tfor ;\n\tMon, 25 Nov 2024 01:52:17 -0800 (PST)","from nuthatch (ip-77-48-47-2.net.vodafone.cz. 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It looks like the app will need manual\n> adjustments to work with this patch - but that's kinda expected IIUC\n> (Millipixels apparently doesn't request raw streams explicitly yet).\n\nThanks for testing.\n\n> It looks like other API changes on master / in 0.4 will require manual\n> changes to the app anyway, so that shouldn't be a big deal.\n>\n> Do I understand correctly that exposure and gain were never supported\n> for raw streams yet? \n\nI think so, I guess they were meant to be set externally, but I'm not\nsure.\n\n> Because in that case the patch here *is* already useful for\n> Millipixels at it would allow it to co-exist with apps requiring swISP\n> without requiring hacks like this:\n> https://gitlab.postmarketos.org/postmarketOS/pmaports/-/blob/master/temp/libcamera/0002-libcamera-simple-Force-disable-softwareISP-for-milli.patch\n>\n> In other words: even without gain/exposure I'd be happy to have this in 0.4, especially if that allows us to enable the swISP on all platforms by\n> default.\n\nOK, let's see what we can reasonably do for 0.4.\n\n> On 22.11.24 21:13, Milan Zamazal wrote:\n>> This makes raw streams working again in ‘simple’ pipeline when software\n>> ISP is enabled for the given device. For now, only a single raw stream\n>> is supported and there are no immediate plans to change that unless\n>> there is a request for more.\n>>\n>> An example ‘cam’ invocation requesting a raw stream rather than a debayered stream:\n>>\n>> cam -c1 -C8 -s role=raw,width=1920,height=1080 -Ffile#.raw\n>>\n>> See the commit message for more information about the patch.\n>>\n>> The patch is RFC because I’m not sure where it is placed on the scale\n>> between a hack/PoC and a proper solution and because it’s not that\n>> useful until a control for exposure/gain adjustments is implemented.\n>>\n>> In the meantime, fixed exposure+gain can be hardwired in\n>> src/ipa/simple/soft_simple.cpp by changing the lines\n>>\n>> ctrls.set(V4L2_CID_EXPOSURE, …);\n>> ctrls.set(V4L2_CID_ANALOGUE_GAIN, …);\n>>\n>> to set the desired values (values used under the given conditions can be\n>> obtained from normal software ISP debayered output debug log).\n>>\n>> Milan Zamazal (1):\n>> libcamera: simple: Fix raw output\n>>\n>> src/libcamera/pipeline/simple/simple.cpp | 66 +++++++++++++++++++-----\n>> 1 file changed, 54 insertions(+), 12 deletions(-)\n>>","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 7788FC32A3\n\tfor ;\n\tMon, 25 Nov 2024 10:02:58 +0000 (UTC)","from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id DFD996601E;\n\tMon, 25 Nov 2024 11:02:57 +0100 (CET)","from us-smtp-delivery-124.mimecast.com\n\t(us-smtp-delivery-124.mimecast.com [170.10.129.124])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id 2F55066010\n\tfor ;\n\tMon, 25 Nov 2024 11:02:56 +0100 (CET)","from mail-wm1-f69.google.com (mail-wm1-f69.google.com\n\t[209.85.128.69]) by relay.mimecast.com with ESMTP with STARTTLS\n\t(version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id\n\tus-mta-269-ZxQVJAFhMvuWoZ3DB92d8w-1; Mon, 25 Nov 2024 05:02:53 -0500","by mail-wm1-f69.google.com with SMTP id\n\t5b1f17b1804b1-434a195814fso1949835e9.3\n\tfor ;\n\tMon, 25 Nov 2024 02:02:53 -0800 (PST)","from nuthatch (ip-77-48-47-2.net.vodafone.cz. 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