[{"id":20432,"web_url":"https://patchwork.libcamera.org/comment/20432/","msgid":"","date":"2021-10-25T11:56:48","subject":"Re: [libcamera-devel] [PATCH v6 6/7] android: post_processor: Drop\n\treturn value for process()","submitter":{"id":63,"url":"https://patchwork.libcamera.org/api/people/63/","name":"Hirokazu Honda","email":"hiroh@chromium.org"},"content":"Hi, Umang, thank you for the patch.\n\nOn Sat, Oct 23, 2021 at 7:33 PM Umang Jain wrote:\n>\n> PostProcessor::process() is invoked by CameraStream class\n> in case any post-processing is required for the camera stream.\n> The failure or success is checked via the value returned by\n> CameraStream::process().\n>\n> Now that the post-processor notifies about the post-processing\n> completion operation, we can drop the return value of\n> PostProcessor::process(). The status of post-processing is passed\n> to CameraDevice::streamProcessingComplete() by the\n> PostProcessor::processComplete signal's slot.\n>\n> Signed-off-by: Umang Jain \n> Reviewed-by: Laurent Pinchart \n> ---\n> src/android/camera_stream.cpp | 4 +++-\n> src/android/jpeg/post_processor_jpeg.cpp | 6 ++----\n> src/android/jpeg/post_processor_jpeg.h | 2 +-\n> src/android/post_processor.h | 2 +-\n> src/android/yuv/post_processor_yuv.cpp | 10 ++++------\n> src/android/yuv/post_processor_yuv.h | 2 +-\n> 6 files changed, 12 insertions(+), 14 deletions(-)\n>\n> diff --git a/src/android/camera_stream.cpp b/src/android/camera_stream.cpp\n> index 4e275cde..45d0607d 100644\n> --- a/src/android/camera_stream.cpp\n> +++ b/src/android/camera_stream.cpp\n> @@ -194,7 +194,9 @@ int CameraStream::process(const FrameBuffer &source,\n>\n> dest.srcBuffer = &source;\n>\n> - return postProcessor_->process(&dest);\n> + postProcessor_->process(&dest);\n> +\n> + return 0;\n> }\n\nShall we also drop the return value of CameraStream::process() as we\nprocess any case by streamProcessingComplete()?\nI think whether streamProcessingComplete() is called depends on the\nreturn value of CameraStream::process(), which may be error-prone?\n\n>\n> FrameBuffer *CameraStream::getBuffer()\n> diff --git a/src/android/jpeg/post_processor_jpeg.cpp b/src/android/jpeg/post_processor_jpeg.cpp\n> index cbbe7128..9d7523cb 100644\n> --- a/src/android/jpeg/post_processor_jpeg.cpp\n> +++ b/src/android/jpeg/post_processor_jpeg.cpp\n> @@ -98,7 +98,7 @@ void PostProcessorJpeg::generateThumbnail(const FrameBuffer &source,\n> }\n> }\n>\n> -int PostProcessorJpeg::process(Camera3RequestDescriptor::StreamBuffer *streamBuffer)\n> +void PostProcessorJpeg::process(Camera3RequestDescriptor::StreamBuffer *streamBuffer)\n> {\n> ASSERT(encoder_);\n>\n> @@ -199,7 +199,7 @@ int PostProcessorJpeg::process(Camera3RequestDescriptor::StreamBuffer *streamBuf\n> if (jpeg_size < 0) {\n> LOG(JPEG, Error) << \"Failed to encode stream image\";\n> processComplete.emit(streamBuffer, PostProcessor::Status::Error);\n> - return jpeg_size;\n> + return;\n> }\n>\n> /* Fill in the JPEG blob header. */\n> @@ -213,6 +213,4 @@ int PostProcessorJpeg::process(Camera3RequestDescriptor::StreamBuffer *streamBuf\n> /* Update the JPEG result Metadata. */\n> resultMetadata->addEntry(ANDROID_JPEG_SIZE, jpeg_size);\n> processComplete.emit(streamBuffer, PostProcessor::Status::Success);\n> -\n> - return 0;\n> }\n> diff --git a/src/android/jpeg/post_processor_jpeg.h b/src/android/jpeg/post_processor_jpeg.h\n> index 92385548..43fcbe60 100644\n> --- a/src/android/jpeg/post_processor_jpeg.h\n> +++ b/src/android/jpeg/post_processor_jpeg.h\n> @@ -22,7 +22,7 @@ public:\n>\n> int configure(const libcamera::StreamConfiguration &incfg,\n> const libcamera::StreamConfiguration &outcfg) override;\n> - int process(Camera3RequestDescriptor::StreamBuffer *streamBuffer) override;\n> + void process(Camera3RequestDescriptor::StreamBuffer *streamBuffer) override;\n>\n> private:\n> void generateThumbnail(const libcamera::FrameBuffer &source,\n> diff --git a/src/android/post_processor.h b/src/android/post_processor.h\n> index 4ac74fcf..5ec71c93 100644\n> --- a/src/android/post_processor.h\n> +++ b/src/android/post_processor.h\n> @@ -27,7 +27,7 @@ public:\n>\n> virtual int configure(const libcamera::StreamConfiguration &inCfg,\n> const libcamera::StreamConfiguration &outCfg) = 0;\n> - virtual int process(Camera3RequestDescriptor::StreamBuffer *streamBuffer) = 0;\n> + virtual void process(Camera3RequestDescriptor::StreamBuffer *streamBuffer) = 0;\n>\n> libcamera::Signal processComplete;\n> };\n> diff --git a/src/android/yuv/post_processor_yuv.cpp b/src/android/yuv/post_processor_yuv.cpp\n> index 8e77bf57..1ac7995a 100644\n> --- a/src/android/yuv/post_processor_yuv.cpp\n> +++ b/src/android/yuv/post_processor_yuv.cpp\n> @@ -49,21 +49,21 @@ int PostProcessorYuv::configure(const StreamConfiguration &inCfg,\n> return 0;\n> }\n>\n> -int PostProcessorYuv::process(Camera3RequestDescriptor::StreamBuffer *streamBuffer)\n> +void PostProcessorYuv::process(Camera3RequestDescriptor::StreamBuffer *streamBuffer)\n> {\n> const FrameBuffer &source = *streamBuffer->srcBuffer;\n> CameraBuffer *destination = streamBuffer->destBuffer.get();\n>\n> if (!isValidBuffers(source, *destination)) {\n> processComplete.emit(streamBuffer, PostProcessor::Status::Error);\n> - return -EINVAL;\n> + return;\n> }\n>\n> const MappedFrameBuffer sourceMapped(&source, MappedFrameBuffer::MapFlag::Read);\n> if (!sourceMapped.isValid()) {\n> LOG(YUV, Error) << \"Failed to mmap camera frame buffer\";\n> processComplete.emit(streamBuffer, PostProcessor::Status::Error);\n> - return -EINVAL;\n> + return;\n> }\n>\n> int ret = libyuv::NV12Scale(sourceMapped.planes()[0].data(),\n> @@ -81,12 +81,10 @@ int PostProcessorYuv::process(Camera3RequestDescriptor::StreamBuffer *streamBuff\n> if (ret) {\n> LOG(YUV, Error) << \"Failed NV12 scaling: \" << ret;\n> processComplete.emit(streamBuffer, PostProcessor::Status::Error);\n> - return -EINVAL;\n> + return;\n> }\n>\n> processComplete.emit(streamBuffer, PostProcessor::Status::Success);\n> -\n> - return 0;\n> }\n>\n> bool PostProcessorYuv::isValidBuffers(const FrameBuffer &source,\n> diff --git a/src/android/yuv/post_processor_yuv.h b/src/android/yuv/post_processor_yuv.h\n> index 5954e11b..39ec7994 100644\n> --- a/src/android/yuv/post_processor_yuv.h\n> +++ b/src/android/yuv/post_processor_yuv.h\n> @@ -18,7 +18,7 @@ public:\n>\n> int configure(const libcamera::StreamConfiguration &incfg,\n> const libcamera::StreamConfiguration &outcfg) override;\n> - int process(Camera3RequestDescriptor::StreamBuffer *streamBuffer) override;\n> + void process(Camera3RequestDescriptor::StreamBuffer *streamBuffer) override;\n>\n> private:\n> bool isValidBuffers(const libcamera::FrameBuffer &source,\n> --\n> 2.31.1\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 11A4FBDB1C\n\tfor ;\n\tMon, 25 Oct 2021 11:57:02 +0000 (UTC)","from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id 702256486E;\n\tMon, 25 Oct 2021 13:57:01 +0200 (CEST)","from mail-ed1-x535.google.com (mail-ed1-x535.google.com\n\t[IPv6:2a00:1450:4864:20::535])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id EF73C60124\n\tfor ;\n\tMon, 25 Oct 2021 13:56:59 +0200 (CEST)","by mail-ed1-x535.google.com with SMTP id 5so25733144edw.7\n\tfor ;\n\tMon, 25 Oct 2021 04:56:59 -0700 (PDT)"],"Authentication-Results":"lancelot.ideasonboard.com; dkim=pass (1024-bit key;\n\tunprotected) header.d=chromium.org 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(PDT)","MIME-Version":"1.0","References":"<20211023103302.152769-1-umang.jain@ideasonboard.com>\n\t<20211023103302.152769-7-umang.jain@ideasonboard.com>","In-Reply-To":"<20211023103302.152769-7-umang.jain@ideasonboard.com>","From":"Hirokazu Honda ","Date":"Mon, 25 Oct 2021 20:56:48 +0900","Message-ID":"","To":"Umang Jain ","Content-Type":"text/plain; charset=\"UTF-8\"","Subject":"Re: [libcamera-devel] [PATCH v6 6/7] android: post_processor: Drop\n\treturn value for process()","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","Cc":"libcamera devel ","Errors-To":"libcamera-devel-bounces@lists.libcamera.org","Sender":"\"libcamera-devel\" "}},{"id":20434,"web_url":"https://patchwork.libcamera.org/comment/20434/","msgid":"","date":"2021-10-25T12:54:08","subject":"Re: [libcamera-devel] [PATCH v6 6/7] android: post_processor: Drop\n\treturn value for process()","submitter":{"id":86,"url":"https://patchwork.libcamera.org/api/people/86/","name":"Umang Jain","email":"umang.jain@ideasonboard.com"},"content":"Hi Hiro,\n\nOn 10/25/21 5:26 PM, Hirokazu Honda wrote:\n> Hi, Umang, thank you for the patch.\n>\n> On Sat, Oct 23, 2021 at 7:33 PM Umang Jain wrote:\n>> PostProcessor::process() is invoked by CameraStream class\n>> in case any post-processing is required for the camera stream.\n>> The failure or success is checked via the value returned by\n>> CameraStream::process().\n>>\n>> Now that the post-processor notifies about the post-processing\n>> completion operation, we can drop the return value of\n>> PostProcessor::process(). The status of post-processing is passed\n>> to CameraDevice::streamProcessingComplete() by the\n>> PostProcessor::processComplete signal's slot.\n>>\n>> Signed-off-by: Umang Jain \n>> Reviewed-by: Laurent Pinchart \n>> ---\n>> src/android/camera_stream.cpp | 4 +++-\n>> src/android/jpeg/post_processor_jpeg.cpp | 6 ++----\n>> src/android/jpeg/post_processor_jpeg.h | 2 +-\n>> src/android/post_processor.h | 2 +-\n>> src/android/yuv/post_processor_yuv.cpp | 10 ++++------\n>> src/android/yuv/post_processor_yuv.h | 2 +-\n>> 6 files changed, 12 insertions(+), 14 deletions(-)\n>>\n>> diff --git a/src/android/camera_stream.cpp b/src/android/camera_stream.cpp\n>> index 4e275cde..45d0607d 100644\n>> --- a/src/android/camera_stream.cpp\n>> +++ b/src/android/camera_stream.cpp\n>> @@ -194,7 +194,9 @@ int CameraStream::process(const FrameBuffer &source,\n>>\n>> dest.srcBuffer = &source;\n>>\n>> - return postProcessor_->process(&dest);\n>> + postProcessor_->process(&dest);\n>> +\n>> + return 0;\n>> }\n> Shall we also drop the return value of CameraStream::process() as we\n> process any case by streamProcessingComplete()?\n> I think whether streamProcessingComplete() is called depends on the\n> return value of CameraStream::process(), which may be error-prone?\n\n\nNo, this was discussed before. We want to handle CameraStream::process() \nsynchronously, and streamProcessingComplete() will error-handle for the \nasync only. This is the design we agreed upon.\n\n>\n>> FrameBuffer *CameraStream::getBuffer()\n>> diff --git a/src/android/jpeg/post_processor_jpeg.cpp b/src/android/jpeg/post_processor_jpeg.cpp\n>> index cbbe7128..9d7523cb 100644\n>> --- a/src/android/jpeg/post_processor_jpeg.cpp\n>> +++ b/src/android/jpeg/post_processor_jpeg.cpp\n>> @@ -98,7 +98,7 @@ void PostProcessorJpeg::generateThumbnail(const FrameBuffer &source,\n>> }\n>> }\n>>\n>> -int PostProcessorJpeg::process(Camera3RequestDescriptor::StreamBuffer *streamBuffer)\n>> +void PostProcessorJpeg::process(Camera3RequestDescriptor::StreamBuffer *streamBuffer)\n>> {\n>> ASSERT(encoder_);\n>>\n>> @@ -199,7 +199,7 @@ int PostProcessorJpeg::process(Camera3RequestDescriptor::StreamBuffer *streamBuf\n>> if (jpeg_size < 0) {\n>> LOG(JPEG, Error) << \"Failed to encode stream image\";\n>> processComplete.emit(streamBuffer, PostProcessor::Status::Error);\n>> - return jpeg_size;\n>> + return;\n>> }\n>>\n>> /* Fill in the JPEG blob header. */\n>> @@ -213,6 +213,4 @@ int PostProcessorJpeg::process(Camera3RequestDescriptor::StreamBuffer *streamBuf\n>> /* Update the JPEG result Metadata. */\n>> resultMetadata->addEntry(ANDROID_JPEG_SIZE, jpeg_size);\n>> processComplete.emit(streamBuffer, PostProcessor::Status::Success);\n>> -\n>> - return 0;\n>> }\n>> diff --git a/src/android/jpeg/post_processor_jpeg.h b/src/android/jpeg/post_processor_jpeg.h\n>> index 92385548..43fcbe60 100644\n>> --- a/src/android/jpeg/post_processor_jpeg.h\n>> +++ b/src/android/jpeg/post_processor_jpeg.h\n>> @@ -22,7 +22,7 @@ public:\n>>\n>> int configure(const libcamera::StreamConfiguration &incfg,\n>> const libcamera::StreamConfiguration &outcfg) override;\n>> - int process(Camera3RequestDescriptor::StreamBuffer *streamBuffer) override;\n>> + void process(Camera3RequestDescriptor::StreamBuffer *streamBuffer) override;\n>>\n>> private:\n>> void generateThumbnail(const libcamera::FrameBuffer &source,\n>> diff --git a/src/android/post_processor.h b/src/android/post_processor.h\n>> index 4ac74fcf..5ec71c93 100644\n>> --- a/src/android/post_processor.h\n>> +++ b/src/android/post_processor.h\n>> @@ -27,7 +27,7 @@ public:\n>>\n>> virtual int configure(const libcamera::StreamConfiguration &inCfg,\n>> const libcamera::StreamConfiguration &outCfg) = 0;\n>> - virtual int process(Camera3RequestDescriptor::StreamBuffer *streamBuffer) = 0;\n>> + virtual void process(Camera3RequestDescriptor::StreamBuffer *streamBuffer) = 0;\n>>\n>> libcamera::Signal processComplete;\n>> };\n>> diff --git a/src/android/yuv/post_processor_yuv.cpp b/src/android/yuv/post_processor_yuv.cpp\n>> index 8e77bf57..1ac7995a 100644\n>> --- a/src/android/yuv/post_processor_yuv.cpp\n>> +++ b/src/android/yuv/post_processor_yuv.cpp\n>> @@ -49,21 +49,21 @@ int PostProcessorYuv::configure(const StreamConfiguration &inCfg,\n>> return 0;\n>> }\n>>\n>> -int PostProcessorYuv::process(Camera3RequestDescriptor::StreamBuffer *streamBuffer)\n>> +void PostProcessorYuv::process(Camera3RequestDescriptor::StreamBuffer *streamBuffer)\n>> {\n>> const FrameBuffer &source = *streamBuffer->srcBuffer;\n>> CameraBuffer *destination = streamBuffer->destBuffer.get();\n>>\n>> if (!isValidBuffers(source, *destination)) {\n>> processComplete.emit(streamBuffer, PostProcessor::Status::Error);\n>> - return -EINVAL;\n>> + return;\n>> }\n>>\n>> const MappedFrameBuffer sourceMapped(&source, MappedFrameBuffer::MapFlag::Read);\n>> if (!sourceMapped.isValid()) {\n>> LOG(YUV, Error) << \"Failed to mmap camera frame buffer\";\n>> processComplete.emit(streamBuffer, PostProcessor::Status::Error);\n>> - return -EINVAL;\n>> + return;\n>> }\n>>\n>> int ret = libyuv::NV12Scale(sourceMapped.planes()[0].data(),\n>> @@ -81,12 +81,10 @@ int PostProcessorYuv::process(Camera3RequestDescriptor::StreamBuffer *streamBuff\n>> if (ret) {\n>> LOG(YUV, Error) << \"Failed NV12 scaling: \" << ret;\n>> processComplete.emit(streamBuffer, PostProcessor::Status::Error);\n>> - return -EINVAL;\n>> + return;\n>> }\n>>\n>> processComplete.emit(streamBuffer, PostProcessor::Status::Success);\n>> -\n>> - return 0;\n>> }\n>>\n>> bool PostProcessorYuv::isValidBuffers(const FrameBuffer &source,\n>> diff --git a/src/android/yuv/post_processor_yuv.h b/src/android/yuv/post_processor_yuv.h\n>> index 5954e11b..39ec7994 100644\n>> --- a/src/android/yuv/post_processor_yuv.h\n>> +++ b/src/android/yuv/post_processor_yuv.h\n>> @@ -18,7 +18,7 @@ public:\n>>\n>> int configure(const libcamera::StreamConfiguration &incfg,\n>> const libcamera::StreamConfiguration &outcfg) override;\n>> - int process(Camera3RequestDescriptor::StreamBuffer *streamBuffer) override;\n>> + void process(Camera3RequestDescriptor::StreamBuffer *streamBuffer) override;\n>>\n>> private:\n>> bool isValidBuffers(const libcamera::FrameBuffer &source,\n>> --\n>> 2.31.1\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 B77FBBDB1C\n\tfor ;\n\tMon, 25 Oct 2021 12:54:15 +0000 (UTC)","from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id 0C9B56486E;\n\tMon, 25 Oct 2021 14:54:15 +0200 (CEST)","from perceval.ideasonboard.com (perceval.ideasonboard.com\n\t[213.167.242.64])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id 28E9760124\n\tfor ;\n\tMon, 25 Oct 2021 14:54:13 +0200 (CEST)","from [192.168.1.106] (unknown [103.251.226.211])\n\tby perceval.ideasonboard.com (Postfix) with ESMTPSA id 2B7A73F0;\n\tMon, 25 Oct 2021 14:54:12 +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=\"DTK3LMzt\"; dkim-atps=neutral","DKIM-Signature":"v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com;\n\ts=mail; t=1635166452;\n\tbh=pNapGsJ2zQLCmMxzM3pqabPfuuccPVpIAGbUsf0rxQo=;\n\th=Subject:To:Cc:References:From:Date:In-Reply-To:From;\n\tb=DTK3LMztP7LkSX+x3ZxClSP4Lk2pccneNSyThbZRlMrVNIJzxX+fvc4EQdYBXH303\n\tR7fur5Th7i0/Ta8gzQ3hBcQvfvegAAPne0ZTudP4w+DXR9uvePaPRQXWmi1h70tXzP\n\tF7G4QhRX1QntfI6az2HEyz5nmPEGhM4Rtkz70w0s=","To":"Hirokazu Honda ","References":"<20211023103302.152769-1-umang.jain@ideasonboard.com>\n\t<20211023103302.152769-7-umang.jain@ideasonboard.com>\n\t","From":"Umang Jain ","Message-ID":"","Date":"Mon, 25 Oct 2021 18:24:08 +0530","User-Agent":"Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101\n\tThunderbird/78.10.2","MIME-Version":"1.0","In-Reply-To":"","Content-Type":"text/plain; charset=utf-8; format=flowed","Content-Transfer-Encoding":"7bit","Content-Language":"en-US","Subject":"Re: [libcamera-devel] [PATCH v6 6/7] android: post_processor: Drop\n\treturn value for process()","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","Cc":"libcamera devel ","Errors-To":"libcamera-devel-bounces@lists.libcamera.org","Sender":"\"libcamera-devel\" "}}]