{"id":11177,"url":"https://patchwork.libcamera.org/api/patches/11177/?format=json","web_url":"https://patchwork.libcamera.org/patch/11177/","project":{"id":1,"url":"https://patchwork.libcamera.org/api/projects/1/?format=json","name":"libcamera","link_name":"libcamera","list_id":"libcamera_core","list_email":"libcamera-devel@lists.libcamera.org","web_url":"","scm_url":"","webscm_url":""},"msgid":"<20210205131044.512128-4-helen.koike@collabora.com>","date":"2021-02-05T13:10:44","name":"[libcamera-devel,RFC,3/3] libcamera: Use VIDIOC_EXT_(D)QBUF for buffer handling","commit_ref":null,"pull_url":null,"state":"new","archived":false,"hash":"93d9bb35495dd728da52c444773014c6e1106fcf","submitter":{"id":20,"url":"https://patchwork.libcamera.org/api/people/20/?format=json","name":"Helen Koike","email":"helen.koike@collabora.com"},"delegate":null,"mbox":"https://patchwork.libcamera.org/patch/11177/mbox/","series":[{"id":1657,"url":"https://patchwork.libcamera.org/api/series/1657/?format=json","web_url":"https://patchwork.libcamera.org/project/libcamera/list/?series=1657","date":"2021-02-05T13:10:41","name":"libcamera: Use extended fmt and buffer ioctls API","version":1,"mbox":"https://patchwork.libcamera.org/series/1657/mbox/"}],"comments":"https://patchwork.libcamera.org/api/patches/11177/comments/","check":"pending","checks":"https://patchwork.libcamera.org/api/patches/11177/checks/","tags":{},"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 A3BADBD162\n\tfor ;\n\tFri, 5 Feb 2021 13:11:07 +0000 (UTC)","from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id 7E8F1614BA;\n\tFri, 5 Feb 2021 14:11:07 +0100 (CET)","from bhuna.collabora.co.uk (bhuna.collabora.co.uk [46.235.227.227])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id 33D69614B0\n\tfor ;\n\tFri, 5 Feb 2021 14:11:06 +0100 (CET)","from [127.0.0.1] (localhost [127.0.0.1])\n\t(Authenticated sender: koike) with ESMTPSA id 88BF21F466AD"],"From":"Helen Koike ","To":"libcamera-devel@lists.libcamera.org","Date":"Fri, 5 Feb 2021 10:10:44 -0300","Message-Id":"<20210205131044.512128-4-helen.koike@collabora.com>","X-Mailer":"git-send-email 2.30.0","In-Reply-To":"<20210205131044.512128-1-helen.koike@collabora.com>","References":"<20210205131044.512128-1-helen.koike@collabora.com>","MIME-Version":"1.0","Subject":"[libcamera-devel] [RFC PATCH 3/3] libcamera: Use VIDIOC_EXT_(D)QBUF\n\tfor buffer handling","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":"kieran.bingham+renesas@ideasonboard.com, frkoenig@chromium.org,\n\tkernel@collabora.com","Content-Type":"text/plain; charset=\"us-ascii\"","Content-Transfer-Encoding":"7bit","Errors-To":"libcamera-devel-bounces@lists.libcamera.org","Sender":"\"libcamera-devel\" "},"content":"Use Ext API for buffer handling.\nAllow memory buffers to be defined per color component.\n\nSigned-off-by: Helen Koike \n---\n src/libcamera/v4l2_videodevice.cpp | 75 ++++++++++++------------------\n src/v4l2/v4l2_camera_proxy.cpp | 20 ++++----\n 2 files changed, 41 insertions(+), 54 deletions(-)","diff":"diff --git a/src/libcamera/v4l2_videodevice.cpp b/src/libcamera/v4l2_videodevice.cpp\nindex fab3ba4c..0a724266 100644\n--- a/src/libcamera/v4l2_videodevice.cpp\n+++ b/src/libcamera/v4l2_videodevice.cpp\n@@ -141,7 +141,7 @@ LOG_DECLARE_CATEGORY(V4L2)\n * \\brief Hot cache of associations between V4L2 buffer indexes and FrameBuffer\n *\n * When importing buffers, V4L2 performs lazy mapping of dmabuf instances at\n- * VIDIOC_QBUF (or VIDIOC_PREPARE_BUF) time and keeps the mapping associated\n+ * VIDIOC_EXT_QBUF (or VIDIOC_PREPARE_BUF) time and keeps the mapping associated\n * with the V4L2 buffer, as identified by its index. If the same V4L2 buffer is\n * then reused and queued with different dmabufs, the old dmabufs will be\n * unmapped and the new ones mapped. To keep this process efficient, it is\n@@ -1315,8 +1315,8 @@ int V4L2VideoDevice::releaseBuffers()\n */\n int V4L2VideoDevice::queueBuffer(FrameBuffer *buffer)\n {\n-\tstruct v4l2_plane v4l2Planes[VIDEO_MAX_PLANES] = {};\n-\tstruct v4l2_buffer buf = {};\n+\tV4L2DeviceFormat format;\n+\tstruct v4l2_ext_buffer buf = {};\n \tint ret;\n \n \tret = cache_->get(*buffer);\n@@ -1328,46 +1328,46 @@ int V4L2VideoDevice::queueBuffer(FrameBuffer *buffer)\n \tbuf.memory = memoryType_;\n \tbuf.field = V4L2_FIELD_NONE;\n \n-\tbool multiPlanar = V4L2_TYPE_IS_MULTIPLANAR(buf.type);\n \tconst std::vector &planes = buffer->planes();\n \n+\tret = getFormat(&format);\n+\tif (ret < 0)\n+\t\treturn ret;\n+\n \tif (buf.memory == V4L2_MEMORY_DMABUF) {\n-\t\tif (multiPlanar) {\n-\t\t\tfor (unsigned int p = 0; p < planes.size(); ++p)\n-\t\t\t\tv4l2Planes[p].m.fd = planes[p].fd.fd();\n+\t\t/*\n+\t\t * If there is a single memory plane, fill color planes with\n+\t\t * the same dmabuf fd but on a different offset\n+\t\t */\n+\t\tif (planes.size() == 1) {\n+\t\t\tbuf.planes[0].m.dmabuf_fd = planes[0].fd.fd();\n+\t\t\tfor (unsigned int p = 1;\n+\t\t\t p < format.planes.size() && format.planes[p].size; ++p) {\n+\t\t\t\tbuf.planes[p].m.dmabuf_fd = planes[0].fd.fd();\n+\t\t\t\tbuf.planes[p].offset = format.planes[p - 1].size;\n+\t\t\t}\n \t\t} else {\n-\t\t\tbuf.m.fd = planes[0].fd.fd();\n+\t\t\tfor (unsigned int p = 0; p < planes.size(); ++p)\n+\t\t\t\tbuf.planes[p].m.dmabuf_fd = planes[p].fd.fd();\n \t\t}\n \t}\n \n-\tif (multiPlanar) {\n-\t\tbuf.length = planes.size();\n-\t\tbuf.m.planes = v4l2Planes;\n-\t}\n-\n \tif (V4L2_TYPE_IS_OUTPUT(buf.type)) {\n \t\tconst FrameMetadata &metadata = buffer->metadata();\n+\t\tunsigned int nplane = 0;\n \n-\t\tif (multiPlanar) {\n-\t\t\tunsigned int nplane = 0;\n-\t\t\tfor (const FrameMetadata::Plane &plane : metadata.planes) {\n-\t\t\t\tv4l2Planes[nplane].bytesused = plane.bytesused;\n-\t\t\t\tv4l2Planes[nplane].length = buffer->planes()[nplane].length;\n-\t\t\t\tnplane++;\n-\t\t\t}\n-\t\t} else {\n-\t\t\tif (metadata.planes.size())\n-\t\t\t\tbuf.bytesused = metadata.planes[0].bytesused;\n+\t\tfor (const FrameMetadata::Plane &plane : metadata.planes) {\n+\t\t\tbuf.planes[nplane].bytesused = plane.bytesused;\n+\t\t\tnplane++;\n \t\t}\n \n \t\tbuf.sequence = metadata.sequence;\n-\t\tbuf.timestamp.tv_sec = metadata.timestamp / 1000000000;\n-\t\tbuf.timestamp.tv_usec = (metadata.timestamp / 1000) % 1000000;\n+\t\tbuf.timestamp = metadata.timestamp;\n \t}\n \n \tLOG(V4L2, Debug) << \"Queueing buffer \" << buf.index;\n \n-\tret = ioctl(VIDIOC_QBUF, &buf);\n+\tret = ioctl(VIDIOC_EXT_QBUF, &buf);\n \tif (ret < 0) {\n \t\tLOG(V4L2, Error)\n \t\t\t<< \"Failed to queue buffer \" << buf.index << \": \"\n@@ -1413,21 +1413,13 @@ void V4L2VideoDevice::bufferAvailable([[maybe_unused]] EventNotifier *notifier)\n */\n FrameBuffer *V4L2VideoDevice::dequeueBuffer()\n {\n-\tstruct v4l2_buffer buf = {};\n-\tstruct v4l2_plane planes[VIDEO_MAX_PLANES] = {};\n+\tstruct v4l2_ext_buffer buf = {};\n \tint ret;\n \n \tbuf.type = bufferType_;\n \tbuf.memory = memoryType_;\n \n-\tbool multiPlanar = V4L2_TYPE_IS_MULTIPLANAR(buf.type);\n-\n-\tif (multiPlanar) {\n-\t\tbuf.length = VIDEO_MAX_PLANES;\n-\t\tbuf.m.planes = planes;\n-\t}\n-\n-\tret = ioctl(VIDIOC_DQBUF, &buf);\n+\tret = ioctl(VIDIOC_EXT_DQBUF, &buf);\n \tif (ret < 0) {\n \t\tLOG(V4L2, Error)\n \t\t\t<< \"Failed to dequeue buffer: \" << strerror(-ret);\n@@ -1449,16 +1441,11 @@ FrameBuffer *V4L2VideoDevice::dequeueBuffer()\n \t\t\t\t ? FrameMetadata::FrameError\n \t\t\t\t : FrameMetadata::FrameSuccess;\n \tbuffer->metadata_.sequence = buf.sequence;\n-\tbuffer->metadata_.timestamp = buf.timestamp.tv_sec * 1000000000ULL\n-\t\t\t\t + buf.timestamp.tv_usec * 1000ULL;\n+\tbuffer->metadata_.timestamp = buf.timestamp;\n \n \tbuffer->metadata_.planes.clear();\n-\tif (multiPlanar) {\n-\t\tfor (unsigned int nplane = 0; nplane < buf.length; nplane++)\n-\t\t\tbuffer->metadata_.planes.push_back({ planes[nplane].bytesused });\n-\t} else {\n-\t\tbuffer->metadata_.planes.push_back({ buf.bytesused });\n-\t}\n+\tfor (unsigned int nplane = 0; buf.planes[nplane].bytesused; nplane++)\n+\t\tbuffer->metadata_.planes.push_back({ buf.planes[nplane].bytesused });\n \n \treturn buffer;\n }\ndiff --git a/src/v4l2/v4l2_camera_proxy.cpp b/src/v4l2/v4l2_camera_proxy.cpp\nindex f8bfe595..32fed4b8 100644\n--- a/src/v4l2/v4l2_camera_proxy.cpp\n+++ b/src/v4l2/v4l2_camera_proxy.cpp\n@@ -544,9 +544,9 @@ int V4L2CameraProxy::vidioc_querybuf(V4L2CameraFile *file, struct v4l2_buffer *a\n \treturn 0;\n }\n \n-int V4L2CameraProxy::vidioc_qbuf(V4L2CameraFile *file, struct v4l2_buffer *arg)\n+int V4L2CameraProxy::vidioc_ext_qbuf(V4L2CameraFile *file, struct v4l2_ext_buffer *arg)\n {\n-\tLOG(V4L2Compat, Debug) << \"Servicing vidioc_qbuf, index = \"\n+\tLOG(V4L2Compat, Debug) << \"Servicing vidioc_ext_qbuf, index = \"\n \t\t\t << arg->index << \" fd = \" << file->efd();\n \n \tif (arg->index >= bufferCount_)\n@@ -574,8 +574,8 @@ int V4L2CameraProxy::vidioc_qbuf(V4L2CameraFile *file, struct v4l2_buffer *arg)\n \treturn ret;\n }\n \n-int V4L2CameraProxy::vidioc_dqbuf(V4L2CameraFile *file, struct v4l2_buffer *arg,\n-\t\t\t\t MutexLocker *locker)\n+int V4L2CameraProxy::vidioc_ext_dqbuf(V4L2CameraFile *file, struct v4l2_ext_buffer *arg,\n+\t\t\t\t MutexLocker *locker)\n {\n \tLOG(V4L2Compat, Debug) << \"Servicing vidioc_dqbuf fd = \" << file->efd();\n \n@@ -683,8 +683,8 @@ const std::set V4L2CameraProxy::supportedIoctls_ = {\n \tVIDIOC_S_INPUT,\n \tVIDIOC_REQBUFS,\n \tVIDIOC_QUERYBUF,\n-\tVIDIOC_QBUF,\n-\tVIDIOC_DQBUF,\n+\tVIDIOC_EXT_QBUF,\n+\tVIDIOC_EXT_DQBUF,\n \tVIDIOC_STREAMON,\n \tVIDIOC_STREAMOFF,\n };\n@@ -749,11 +749,11 @@ int V4L2CameraProxy::ioctl(V4L2CameraFile *file, unsigned long request, void *ar\n \tcase VIDIOC_QUERYBUF:\n \t\tret = vidioc_querybuf(file, static_cast(arg));\n \t\tbreak;\n-\tcase VIDIOC_QBUF:\n-\t\tret = vidioc_qbuf(file, static_cast(arg));\n+\tcase VIDIOC_EXT_QBUF:\n+\t\tret = vidioc_ext_qbuf(file, static_cast(arg));\n \t\tbreak;\n-\tcase VIDIOC_DQBUF:\n-\t\tret = vidioc_dqbuf(file, static_cast(arg), &locker);\n+\tcase VIDIOC_EXT_DQBUF:\n+\t\tret = vidioc_ext_dqbuf(file, static_cast(arg), &locker);\n \t\tbreak;\n \tcase VIDIOC_STREAMON:\n \t\tret = vidioc_streamon(file, static_cast(arg));\n","prefixes":["libcamera-devel","RFC","3/3"]}