[{"id":13238,"web_url":"https://patchwork.libcamera.org/comment/13238/","msgid":"<1b36722a-e76f-02f3-9ec3-739c58320ab7@ideasonboard.com>","date":"2020-10-16T09:04:58","subject":"Re: [libcamera-devel] [PATCH] simple-cam: Reuse Requests","submitter":{"id":4,"url":"https://patchwork.libcamera.org/api/people/4/","name":"Kieran Bingham","email":"kieran.bingham@ideasonboard.com"},"content":"Hi Paul,\n\nOn 16/10/2020 06:51, Paul Elder wrote:\n> Update simple-cam to reuse Request objects, and use the new API with\n> unique pointers.\n> \n\nThank you for updating this.\n\n> Signed-off-by: Paul Elder \n> ---\n> simple-cam.cpp | 35 ++++++++---------------------------\n> 1 file changed, 8 insertions(+), 27 deletions(-)\n> \n> diff --git a/simple-cam.cpp b/simple-cam.cpp\n> index 3aa975e..727bb6d 100644\n> --- a/simple-cam.cpp\n> +++ b/simple-cam.cpp\n> @@ -55,27 +55,8 @@ static void requestComplete(Request *request)\n> \t\t */\n> \t}\n> \n> -\t/*\n> -\t * Re-queue a Request to the camera.\n> -\t *\n> -\t * Create a new request and populate it with one buffer for each\n> -\t * stream.\n> -\t */\n> -\trequest = camera->createRequest();\n> -\tif (!request)\n> -\t{\n> -\t\tstd::cerr << \"Can't create request\" << std::endl;\n> -\t\treturn;\n> -\t}\n> -\n> -\tfor (auto it = buffers.begin(); it != buffers.end(); ++it)\n> -\t{\n> -\t\tconst Stream *stream = it->first;\n> -\t\tFrameBuffer *buffer = it->second;\n> -\n> -\t\trequest->addBuffer(stream, buffer);\n> -\t}\n> -\n> +\t/* Re-queue the Request to the camera. */\n> +\trequest->reuse(Request::ReuseBuffers);\n\n\nOh - now that reduces some code ;-)\n\n\n> \tcamera->queueRequest(request);\n> }\n> \n> @@ -263,9 +244,9 @@ int main()\n> \t */\n> \tStream *stream = streamConfig.stream();\n> \tconst std::vector> &buffers = allocator->buffers(stream);\n> -\tstd::vector requests;\n> +\tstd::vector> requests;\n\nI like this. Now 'we' own the requests.\n\n> \tfor (unsigned int i = 0; i < buffers.size(); ++i) {\n> -\t\tRequest *request = camera->createRequest();\n> +\t\tstd::unique_ptr request = camera->createRequest();\n> \t\tif (!request)\n> \t\t{\n> \t\t\tstd::cerr << \"Can't create request\" << std::endl;\n> @@ -281,13 +262,13 @@ int main()\n> \t\t\treturn ret;\n> \t\t}\n> \n> -\t\trequests.push_back(request);\n> -\n> \t\t/*\n> \t\t * Controls can be added to a request on a per frame basis.\n> \t\t */\n> \t\tControlList &controls = request->controls();\n> \t\tcontrols.set(controls::Brightness, 0.5);\n> +\n> +\t\trequests.push_back(std::move(request));\n> \t}\n> \n> \t/*\n> @@ -323,8 +304,8 @@ int main()\n> \t * Camera::requestCompleted Signal is called.\n> \t */\n> \tcamera->start();\n> -\tfor (Request *request : requests)\n> -\t\tcamera->queueRequest(request);\n> +\tfor (std::unique_ptr &request : requests)\n> +\t\tcamera->queueRequest(request.get());\n\nReviewed-by: Kieran Bingham \n\nThanks!\n\n> \n> \t/*\n> \t * --------------------------------------------------------------------\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 B669FBDB1F\n\tfor ;\n\tFri, 16 Oct 2020 09:05:03 +0000 (UTC)","from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id 2B066610C4;\n\tFri, 16 Oct 2020 11:05:03 +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 9669460E36\n\tfor ;\n\tFri, 16 Oct 2020 11:05:01 +0200 (CEST)","from [192.168.0.20]\n\t(cpc89244-aztw30-2-0-cust3082.18-1.cable.virginm.net [86.31.172.11])\n\tby perceval.ideasonboard.com (Postfix) with ESMTPSA id DFA86528;\n\tFri, 16 Oct 2020 11:05:00 +0200 (CEST)"],"Authentication-Results":"lancelot.ideasonboard.com;\n\tdkim=fail reason=\"signature verification failed\" (1024-bit key;\n\tunprotected) header.d=ideasonboard.com header.i=@ideasonboard.com\n\theader.b=\"musUja4k\"; dkim-atps=neutral","DKIM-Signature":"v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com;\n\ts=mail; t=1602839101;\n\tbh=KVMKo4zP4fMURkl82JTzFHzRhxew1/Mx5kS8MV2FJqE=;\n\th=Reply-To:Subject:To:References:From:Date:In-Reply-To:From;\n\tb=musUja4ki4PXw9/Hu0bnIplFbgcZ74GbhfmtPGF5jxnf9CQPKAV6SNve2SMy17YkR\n\thwu4Wwpc1dm4inOfyXrFT6f659ASTovi2c3K09tIo4FeUNfXeVN3t4OdxRGTuOzC62\n\tA9vzmj0LL95jLmXHCfADafvikR0s/A7OjP/46o4g=","To":"Paul Elder ,\n\tlibcamera-devel@lists.libcamera.org","References":"<20201016055119.682577-1-paul.elder@ideasonboard.com>","From":"Kieran Bingham ","Autocrypt":"addr=kieran.bingham@ideasonboard.com; keydata=\n\tmQINBFYE/WYBEACs1PwjMD9rgCu1hlIiUA1AXR4rv2v+BCLUq//vrX5S5bjzxKAryRf0uHat\n\tV/zwz6hiDrZuHUACDB7X8OaQcwhLaVlq6byfoBr25+hbZG7G3+5EUl9cQ7dQEdvNj6V6y/SC\n\trRanWfelwQThCHckbobWiQJfK9n7rYNcPMq9B8e9F020LFH7Kj6YmO95ewJGgLm+idg1Kb3C\n\tpotzWkXc1xmPzcQ1fvQMOfMwdS+4SNw4rY9f07Xb2K99rjMwZVDgESKIzhsDB5GY465sCsiQ\n\tcSAZRxqE49RTBq2+EQsbrQpIc8XiffAB8qexh5/QPzCmR4kJgCGeHIXBtgRj+nIkCJPZvZtf\n\tKr2EAbc6tgg6DkAEHJb+1okosV09+0+TXywYvtEop/WUOWQ+zo+Y/OBd+8Ptgt1pDRyOBzL8\n\tRXa8ZqRf0Mwg75D+dKntZeJHzPRJyrlfQokngAAs4PaFt6UfS+ypMAF37T6CeDArQC41V3ko\n\tlPn1yMsVD0p+6i3DPvA/GPIksDC4owjnzVX9kM8Zc5Cx+XoAN0w5Eqo4t6qEVbuettxx55gq\n\t8K8FieAjgjMSxngo/HST8TpFeqI5nVeq0/lqtBRQKumuIqDg+Bkr4L1V/PSB6XgQcOdhtd36\n\tOe9X9dXB8YSNt7VjOcO7BTmFn/Z8r92mSAfHXpb07YJWJosQOQARAQABtDBLaWVyYW4gQmlu\n\tZ2hhbSA8a2llcmFuLmJpbmdoYW1AaWRlYXNvbmJvYXJkLmNvbT6JAlcEEwEKAEECGwMFCwkI\n\tBwIGFQgJCgsCBBYCAwECHgECF4ACGQEWIQSQLdeYP70o/eNy1HqhHkZyEKRh/QUCXWTtygUJ\n\tCyJXZAAKCRChHkZyEKRh/f8dEACTDsbLN2nioNZMwyLuQRUAFcXNolDX48xcUXsWS2QjxaPm\n\tVsJx8Uy8aYkS85mdPBh0C83OovQR/OVbr8AxhGvYqBs3nQvbWuTl/+4od7DfK2VZOoKBAu5S\n\tQK2FYuUcikDqYcFWJ8DQnubxfE8dvzojHEkXw0sA4igINHDDFX3HJGZtLio+WpEFQtCbfTAG\n\tYZslasz1YZRbwEdSsmO3/kqy5eMnczlm8a21A3fKUo3g8oAZEFM+f4DUNzqIltg31OAB/kZS\n\tenKZQ/SWC8PmLg/ZXBrReYakxXtkP6w3FwMlzOlhGxqhIRNiAJfXJBaRhuUWzPOpEDE9q5YJ\n\tBmqQL2WJm1VSNNVxbXJHpaWMH1sA2R00vmvRrPXGwyIO0IPYeUYQa3gsy6k+En/aMQJd27dp\n\taScf9am9PFICPY5T4ppneeJLif2lyLojo0mcHOV+uyrds9XkLpp14GfTkeKPdPMrLLTsHRfH\n\tfA4I4OBpRrEPiGIZB/0im98MkGY/Mu6qxeZmYLCcgD6qz4idOvfgVOrNh+aA8HzIVR+RMW8H\n\tQGBN9f0E3kfwxuhl3omo6V7lDw8XOdmuWZNC9zPq1UfryVHANYbLGz9KJ4Aw6M+OgBC2JpkD\n\thXMdHUkC+d20dwXrwHTlrJi1YNp6rBc+xald3wsUPOZ5z8moTHUX/uPA/qhGsbkCDQRWBP1m\n\tARAAzijkb+Sau4hAncr1JjOY+KyFEdUNxRy+hqTJdJfaYihxyaj0Ee0P0zEi35CbE6lgU0Uz\n\ttih9fiUbSV3wfsWqg1Ut3/5rTKu7kLFp15kF7eqvV4uezXRD3Qu4yjv/rMmEJbbD4cTvGCYI\n\td6MDC417f7vK3hCbCVIZSp3GXxyC1LU+UQr3fFcOyCwmP9vDUR9JV0BSqHHxRDdpUXE26Dk6\n\tmhf0V1YkspE5St814ETXpEus2urZE5yJIUROlWPIL+hm3NEWfAP06vsQUyLvr/GtbOT79vXl\n\tEn1aulcYyu20dRRxhkQ6iILaURcxIAVJJKPi8dsoMnS8pB0QW12AHWuirPF0g6DiuUfPmrA5\n\tPKe56IGlpkjc8cO51lIxHkWTpCMWigRdPDexKX+Sb+W9QWK/0JjIc4t3KBaiG8O4yRX8ml2R\n\t+rxfAVKM6V769P/hWoRGdgUMgYHFpHGSgEt80OKK5HeUPy2cngDUXzwrqiM5Sz6Od0qw5pCk\n\tNlXqI0W/who0iSVM+8+RmyY0OEkxEcci7rRLsGnM15B5PjLJjh1f2ULYkv8s4SnDwMZ/kE04\n\t/UqCMK/KnX8pwXEMCjz0h6qWNpGwJ0/tYIgQJZh6bqkvBrDogAvuhf60Sogw+mH8b+PBlx1L\n\toeTK396wc+4c3BfiC6pNtUS5GpsPMMjYMk7kVvEAEQEAAYkCPAQYAQoAJgIbDBYhBJAt15g/\n\tvSj943LUeqEeRnIQpGH9BQJdizzIBQkLSKZiAAoJEKEeRnIQpGH9eYgQAJpjaWNgqNOnMTmD\n\tMJggbwjIotypzIXfhHNCeTkG7+qCDlSaBPclcPGYrTwCt0YWPU2TgGgJrVhYT20ierN8LUvj\n\t6qOPTd+Uk7NFzL65qkh80ZKNBFddx1AabQpSVQKbdcLb8OFs85kuSvFdgqZwgxA1vl4TFhNz\n\tPZ79NAmXLackAx3sOVFhk4WQaKRshCB7cSl+RIng5S/ThOBlwNlcKG7j7W2MC06BlTbdEkUp\n\tECzuuRBv8wX4OQl+hbWbB/VKIx5HKlLu1eypen/5lNVzSqMMIYkkZcjV2SWQyUGxSwq0O/sx\n\tS0A8/atCHUXOboUsn54qdxrVDaK+6jIAuo8JiRWctP16KjzUM7MO0/+4zllM8EY57rXrj48j\n\tsbEYX0YQnzaj+jO6kJtoZsIaYR7rMMq9aUAjyiaEZpmP1qF/2sYenDx0Fg2BSlLvLvXM0vU8\n\tpQk3kgDu7kb/7PRYrZvBsr21EIQoIjXbZxDz/o7z95frkP71EaICttZ6k9q5oxxA5WC6sTXc\n\tMW8zs8avFNuA9VpXt0YupJd2ijtZy2mpZNG02fFVXhIn4G807G7+9mhuC4XG5rKlBBUXTvPU\n\tAfYnB4JBDLmLzBFavQfvonSfbitgXwCG3vS+9HEwAjU30Bar1PEOmIbiAoMzuKeRm2LVpmq4\n\tWZw01QYHU/GUV/zHJSFk","Organization":"Ideas on Board","Message-ID":"<1b36722a-e76f-02f3-9ec3-739c58320ab7@ideasonboard.com>","Date":"Fri, 16 Oct 2020 10:04:58 +0100","User-Agent":"Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101\n\tThunderbird/68.10.0","MIME-Version":"1.0","In-Reply-To":"<20201016055119.682577-1-paul.elder@ideasonboard.com>","Content-Language":"en-GB","Subject":"Re: [libcamera-devel] [PATCH] simple-cam: Reuse Requests","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","Reply-To":"kieran.bingham@ideasonboard.com","Content-Type":"text/plain; charset=\"us-ascii\"","Content-Transfer-Encoding":"7bit","Errors-To":"libcamera-devel-bounces@lists.libcamera.org","Sender":"\"libcamera-devel\" "}}]