[{"id":30078,"web_url":"https://patchwork.libcamera.org/comment/30078/","msgid":"<171934871441.739659.11900477062520567230@ping.linuxembedded.co.uk>","date":"2024-06-25T20:51:54","subject":"Re: [PATCH v3 2/4] libcamera: converter_v4l2_m2m: Support crop\n\tselection","submitter":{"id":4,"url":"https://patchwork.libcamera.org/api/people/4/","name":"Kieran Bingham","email":"kieran.bingham@ideasonboard.com"},"content":"Quoting Umang Jain (2024-06-25 07:23:25)\n> Add a helper to set selection rectangle on the video node\n> to support cropping and scaling capabilites.\n> \n> Signed-off-by: Umang Jain \n> ---\n> .../internal/converter/converter_v4l2_m2m.h | 5 ++++\n> .../converter/converter_v4l2_m2m.cpp | 27 +++++++++++++++++++\n> 2 files changed, 32 insertions(+)\n> \n> diff --git a/include/libcamera/internal/converter/converter_v4l2_m2m.h b/include/libcamera/internal/converter/converter_v4l2_m2m.h\n> index b9e59899..846e9f9e 100644\n> --- a/include/libcamera/internal/converter/converter_v4l2_m2m.h\n> +++ b/include/libcamera/internal/converter/converter_v4l2_m2m.h\n> @@ -30,6 +30,7 @@ class Size;\n> class SizeRange;\n> class Stream;\n> struct StreamConfiguration;\n> +class Rectangle;\n> class V4L2M2MDevice;\n> \n> class V4L2M2MConverter : public Converter\n> @@ -57,6 +58,8 @@ public:\n> int queueBuffers(FrameBuffer *input,\n> const std::map &outputs);\n> \n> + int setSelection(const Stream *stream, unsigned int target, Rectangle *rect);\n> +\n> private:\n> class V4L2M2MStream : protected Loggable\n> {\n> @@ -75,6 +78,8 @@ private:\n> \n> int queueBuffers(FrameBuffer *input, FrameBuffer *output);\n> \n> + int setSelection(unsigned int target, Rectangle *rect);\n> +\n> protected:\n> std::string logPrefix() const override;\n> \n> diff --git a/src/libcamera/converter/converter_v4l2_m2m.cpp b/src/libcamera/converter/converter_v4l2_m2m.cpp\n> index 2e77872e..c323f677 100644\n> --- a/src/libcamera/converter/converter_v4l2_m2m.cpp\n> +++ b/src/libcamera/converter/converter_v4l2_m2m.cpp\n> @@ -155,6 +155,15 @@ int V4L2M2MConverter::V4L2M2MStream::queueBuffers(FrameBuffer *input, FrameBuffe\n> return 0;\n> }\n> \n> +int V4L2M2MConverter::V4L2M2MStream::setSelection(unsigned int target, Rectangle *rect)\n> +{\n> + int ret = m2m_->output()->setSelection(target, rect);\n\nCan selections ever be expected to be set on the input()?\n\n> + if (ret < 0)\n> + return ret;\n> +\n> + return 0;\n> +}\n> +\n> std::string V4L2M2MConverter::V4L2M2MStream::logPrefix() const\n> {\n> return stream_->configuration().toString();\n> @@ -374,6 +383,24 @@ int V4L2M2MConverter::exportBuffers(const Stream *stream, unsigned int count,\n> return iter->second->exportBuffers(count, buffers);\n> }\n> \n> +/**\n> + * \\brief Set a selection rectangle \\a rect for \\a target\n> + * \\param[in] stream Pointer to output stream\n> + * \\param[in] target The selection target defined by the V4L2_SEL_TGT_* flags\n> + * \\param[inout] rect The selection rectangle to be applied\n> + *\n> + * \\return 0 on success or a negative error code otherwise\n> + */\n> +int V4L2M2MConverter::setSelection(const Stream *stream, unsigned int target,\n> + Rectangle *rect)\n\nI'm not yet sure how far up the V4L2 types should be transferred in this, but as the class name is V4L2M2M - I think we're still good here.\n\nReviewed-by: Kieran Bingham \n\n> +{\n> + auto iter = streams_.find(stream);\n> + if (iter == streams_.end())\n> + return -EINVAL;\n> +\n> + return iter->second->setSelection(target, rect);\n> +}\n> +\n> /**\n> * \\copydoc libcamera::Converter::start\n> */\n> -- \n> 2.44.0\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 45B12BD87C\n\tfor ;\n\tTue, 25 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t=1719348694;\n\tbh=Ja1Gt+rwBpQfXdpeWoQct4Ntwoe6vXjdhMs0pVDef+k=;\n\th=In-Reply-To:References:Subject:From:Cc:To:Date:From;\n\tb=buVmAhrIYf58AqYezZfE6jEQ/o5DThijk1CrDSvtKX6EdTOXduaZKiiJcwwyLC/3q\n\txBk78yCfGt99oj07197cdkFD6/FKSHjvJeDuYT+9jYqOBs30DR3gEQ4qMEVLTCn45V\n\tEpJ6A1x35B+P8zvW927GXPz0Tn1dPibnkRU4IgBY=","Content-Type":"text/plain; charset=\"utf-8\"","MIME-Version":"1.0","Content-Transfer-Encoding":"quoted-printable","In-Reply-To":"<20240625062327.50940-3-umang.jain@ideasonboard.com>","References":"<20240625062327.50940-1-umang.jain@ideasonboard.com>\n\t<20240625062327.50940-3-umang.jain@ideasonboard.com>","Subject":"Re: [PATCH v3 2/4] libcamera: converter_v4l2_m2m: Support crop\n\tselection","From":"Kieran Bingham ","Cc":"Umang Jain ","To":"Umang Jain ,\n\tlibcamera-devel@lists.libcamera.org","Date":"Tue, 25 Jun 2024 21:51:54 +0100","Message-ID":"<171934871441.739659.11900477062520567230@ping.linuxembedded.co.uk>","User-Agent":"alot/0.10","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":30082,"web_url":"https://patchwork.libcamera.org/comment/30082/","msgid":"<544c9e39-0372-4a1e-b18f-4a98949d8cee@ideasonboard.com>","date":"2024-06-26T03:48:23","subject":"Re: [PATCH v3 2/4] libcamera: converter_v4l2_m2m: Support crop\n\tselection","submitter":{"id":86,"url":"https://patchwork.libcamera.org/api/people/86/","name":"Umang Jain","email":"umang.jain@ideasonboard.com"},"content":"Hi Kieran,\n\nOn 26/06/24 2:21 am, Kieran Bingham wrote:\n> Quoting Umang Jain (2024-06-25 07:23:25)\n>> Add a helper to set selection rectangle on the video node\n>> to support cropping and scaling capabilites.\n>>\n>> Signed-off-by: Umang Jain \n>> ---\n>> .../internal/converter/converter_v4l2_m2m.h | 5 ++++\n>> .../converter/converter_v4l2_m2m.cpp | 27 +++++++++++++++++++\n>> 2 files changed, 32 insertions(+)\n>>\n>> diff --git a/include/libcamera/internal/converter/converter_v4l2_m2m.h b/include/libcamera/internal/converter/converter_v4l2_m2m.h\n>> index b9e59899..846e9f9e 100644\n>> --- a/include/libcamera/internal/converter/converter_v4l2_m2m.h\n>> +++ b/include/libcamera/internal/converter/converter_v4l2_m2m.h\n>> @@ -30,6 +30,7 @@ class Size;\n>> class SizeRange;\n>> class Stream;\n>> struct StreamConfiguration;\n>> +class Rectangle;\n>> class V4L2M2MDevice;\n>> \n>> class V4L2M2MConverter : public Converter\n>> @@ -57,6 +58,8 @@ public:\n>> int queueBuffers(FrameBuffer *input,\n>> const std::map &outputs);\n>> \n>> + int setSelection(const Stream *stream, unsigned int target, Rectangle *rect);\n>> +\n>> private:\n>> class V4L2M2MStream : protected Loggable\n>> {\n>> @@ -75,6 +78,8 @@ private:\n>> \n>> int queueBuffers(FrameBuffer *input, FrameBuffer *output);\n>> \n>> + int setSelection(unsigned int target, Rectangle *rect);\n>> +\n>> protected:\n>> std::string logPrefix() const override;\n>> \n>> diff --git a/src/libcamera/converter/converter_v4l2_m2m.cpp b/src/libcamera/converter/converter_v4l2_m2m.cpp\n>> index 2e77872e..c323f677 100644\n>> --- a/src/libcamera/converter/converter_v4l2_m2m.cpp\n>> +++ b/src/libcamera/converter/converter_v4l2_m2m.cpp\n>> @@ -155,6 +155,15 @@ int V4L2M2MConverter::V4L2M2MStream::queueBuffers(FrameBuffer *input, FrameBuffe\n>> return 0;\n>> }\n>> \n>> +int V4L2M2MConverter::V4L2M2MStream::setSelection(unsigned int target, Rectangle *rect)\n>> +{\n>> + int ret = m2m_->output()->setSelection(target, rect);\n> Can selections ever be expected to be set on the input()?\n\nI don't think so - You get -EINVAL here if you try to set selection on \ninput (i.e. capture) nodes\n>\n>> + if (ret < 0)\n>> + return ret;\n>> +\n>> + return 0;\n>> +}\n>> +\n>> std::string V4L2M2MConverter::V4L2M2MStream::logPrefix() const\n>> {\n>> return stream_->configuration().toString();\n>> @@ -374,6 +383,24 @@ int V4L2M2MConverter::exportBuffers(const Stream *stream, unsigned int count,\n>> return iter->second->exportBuffers(count, buffers);\n>> }\n>> \n>> +/**\n>> + * \\brief Set a selection rectangle \\a rect for \\a target\n>> + * \\param[in] stream Pointer to output stream\n>> + * \\param[in] target The selection target defined by the V4L2_SEL_TGT_* flags\n>> + * \\param[inout] rect The selection rectangle to be applied\n>> + *\n>> + * \\return 0 on success or a negative error code otherwise\n>> + */\n>> +int V4L2M2MConverter::setSelection(const Stream *stream, unsigned int target,\n>> + Rectangle *rect)\n> I'm not yet sure how far up the V4L2 types should be transferred in this, but as the class name is V4L2M2M - I think we're still good here.\n>\n> Reviewed-by: Kieran Bingham \n>\n>> +{\n>> + auto iter = streams_.find(stream);\n>> + if (iter == streams_.end())\n>> + return -EINVAL;\n>> +\n>> + return iter->second->setSelection(target, rect);\n>> +}\n>> +\n>> /**\n>> * \\copydoc libcamera::Converter::start\n>> */\n>> -- \n>> 2.44.0\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 A8E00BDB1D\n\tfor ;\n\tWed, 26 Jun 2024 03:48:26 +0000 (UTC)","from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id 1F570619CC;\n\tWed, 26 Jun 2024 05:48:26 +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 5620C619CC\n\tfor ;\n\tWed, 26 Jun 2024 05:48:24 +0200 (CEST)","from 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libcamera: converter_v4l2_m2m: Support crop\n\tselection","Content-Language":"en-US","To":"Kieran Bingham ,\n\tlibcamera-devel@lists.libcamera.org","References":"<20240625062327.50940-1-umang.jain@ideasonboard.com>\n\t<20240625062327.50940-3-umang.jain@ideasonboard.com>\n\t<171934871441.739659.11900477062520567230@ping.linuxembedded.co.uk>","From":"Umang Jain ","In-Reply-To":"<171934871441.739659.11900477062520567230@ping.linuxembedded.co.uk>","Content-Type":"text/plain; charset=UTF-8; format=flowed","Content-Transfer-Encoding":"7bit","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":30087,"web_url":"https://patchwork.libcamera.org/comment/30087/","msgid":"<20240626073701.GD10453@pendragon.ideasonboard.com>","date":"2024-06-26T07:37:01","subject":"Re: [PATCH v3 2/4] libcamera: converter_v4l2_m2m: Support crop\n\tselection","submitter":{"id":2,"url":"https://patchwork.libcamera.org/api/people/2/","name":"Laurent Pinchart","email":"laurent.pinchart@ideasonboard.com"},"content":"On Tue, Jun 25, 2024 at 09:51:54PM +0100, Kieran Bingham wrote:\n> Quoting Umang Jain (2024-06-25 07:23:25)\n> > Add a helper to set selection rectangle on the video node\n> > to support cropping and scaling capabilites.\n> > \n> > Signed-off-by: Umang Jain \n> > ---\n> > .../internal/converter/converter_v4l2_m2m.h | 5 ++++\n> > .../converter/converter_v4l2_m2m.cpp | 27 +++++++++++++++++++\n> > 2 files changed, 32 insertions(+)\n> > \n> > diff --git a/include/libcamera/internal/converter/converter_v4l2_m2m.h b/include/libcamera/internal/converter/converter_v4l2_m2m.h\n> > index b9e59899..846e9f9e 100644\n> > --- a/include/libcamera/internal/converter/converter_v4l2_m2m.h\n> > +++ b/include/libcamera/internal/converter/converter_v4l2_m2m.h\n> > @@ -30,6 +30,7 @@ class Size;\n> > class SizeRange;\n> > class Stream;\n> > struct StreamConfiguration;\n> > +class Rectangle;\n> > class V4L2M2MDevice;\n> > \n> > class V4L2M2MConverter : public Converter\n> > @@ -57,6 +58,8 @@ public:\n> > int queueBuffers(FrameBuffer *input,\n> > const std::map &outputs);\n> > \n> > + int setSelection(const Stream *stream, unsigned int target, Rectangle *rect);\n\nI think this feature belongs to the Converter API. The ability to crop\nthe input isn't restricted to V4L2-based converters. You will then also\nneed to extend the Converter API to report the supported features, as\nnot all converters will be able to crop. This also means that you\nshouldn't pass a V4L2 selection target, but create functions that focus\non features, not just exposing the V4L2 API to the upper level.\n\n> > +\n> > private:\n> > class V4L2M2MStream : protected Loggable\n> > {\n> > @@ -75,6 +78,8 @@ private:\n> > \n> > int queueBuffers(FrameBuffer *input, FrameBuffer *output);\n> > \n> > + int setSelection(unsigned int target, Rectangle *rect);\n> > +\n> > protected:\n> > std::string logPrefix() const override;\n> > \n> > diff --git a/src/libcamera/converter/converter_v4l2_m2m.cpp b/src/libcamera/converter/converter_v4l2_m2m.cpp\n> > index 2e77872e..c323f677 100644\n> > --- a/src/libcamera/converter/converter_v4l2_m2m.cpp\n> > +++ b/src/libcamera/converter/converter_v4l2_m2m.cpp\n> > @@ -155,6 +155,15 @@ int V4L2M2MConverter::V4L2M2MStream::queueBuffers(FrameBuffer *input, FrameBuffe\n> > return 0;\n> > }\n> > \n> > +int V4L2M2MConverter::V4L2M2MStream::setSelection(unsigned int target, Rectangle *rect)\n> > +{\n> > + int ret = m2m_->output()->setSelection(target, rect);\n> \n> Can selections ever be expected to be set on the input()?\n\nThanks to V4L2's lovely naming scheme, you've confusing input and output\n:-) output() here is the input of the M2M device, the other side is\ncapture().\n\n> > + if (ret < 0)\n> > + return ret;\n> > +\n> > + return 0;\n> > +}\n> > +\n> > std::string V4L2M2MConverter::V4L2M2MStream::logPrefix() const\n> > {\n> > return stream_->configuration().toString();\n> > @@ -374,6 +383,24 @@ int V4L2M2MConverter::exportBuffers(const Stream *stream, unsigned int count,\n> > return iter->second->exportBuffers(count, buffers);\n> > }\n> > \n> > +/**\n> > + * \\brief Set a selection rectangle \\a rect for \\a target\n> > + * \\param[in] stream Pointer to output stream\n> > + * \\param[in] target The selection target defined by the V4L2_SEL_TGT_* flags\n> > + * \\param[inout] rect The selection rectangle to be applied\n> > + *\n> > + * \\return 0 on success or a negative error code otherwise\n> > + */\n> > +int V4L2M2MConverter::setSelection(const Stream *stream, unsigned int target,\n> > + Rectangle *rect)\n> \n> I'm not yet sure how far up the V4L2 types should be transferred in\n> this, but as the class name is V4L2M2M - I think we're still good\n> here.\n> \n> Reviewed-by: Kieran Bingham \n>\n> > +{\n> > + auto iter = streams_.find(stream);\n> > + if (iter == streams_.end())\n> > + return -EINVAL;\n> > +\n> > + return iter->second->setSelection(target, rect);\n> > +}\n> > +\n> > /**\n> > * \\copydoc libcamera::Converter::start\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 7A74BBDB1D\n\tfor ;\n\tWed, 26 Jun 2024 07:37:26 +0000 (UTC)","from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id D3BAD654AA;\n\tWed, 26 Jun 2024 09:37:25 +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 EB1A7654A3\n\tfor ;\n\tWed, 26 Jun 2024 09:37:23 +0200 (CEST)","from pendragon.ideasonboard.com (unknown [193.209.96.36])\n\tby perceval.ideasonboard.com (Postfix) with ESMTPSA id A2C4B73E;\n\tWed, 26 Jun 2024 09:37:00 +0200 (CEST)"],"Authentication-Results":"lancelot.ideasonboard.com; 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