From patchwork Wed Nov 8 16:00:14 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Guennadi Liakhovetski X-Patchwork-Id: 10048725 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 9532C60247 for ; Wed, 8 Nov 2017 16:00:27 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 7C5BD28FF1 for ; Wed, 8 Nov 2017 16:00:27 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 713802A52B; Wed, 8 Nov 2017 16:00:27 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,FREEMAIL_FROM, RCVD_IN_DNSWL_HI,UNPARSEABLE_RELAY autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 0445C2A617 for ; Wed, 8 Nov 2017 16:00:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752265AbdKHQAY (ORCPT ); Wed, 8 Nov 2017 11:00:24 -0500 Received: from mout.gmx.net ([212.227.15.19]:53962 "EHLO mout.gmx.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752690AbdKHQAT (ORCPT ); Wed, 8 Nov 2017 11:00:19 -0500 Received: from axis700.grange ([84.44.207.202]) by mail.gmx.com (mrgmx003 [212.227.17.190]) with ESMTPSA (Nemesis) id 0MAgzj-1eMara3jAZ-00BqhA for ; Wed, 08 Nov 2017 17:00:18 +0100 Received: from 200r.grange (200r.grange [192.168.1.16]) by axis700.grange (Postfix) with ESMTP id ADD3C618B5 for ; Wed, 8 Nov 2017 17:00:15 +0100 (CET) Received: from lyakh (uid 1000) (envelope-from g.liakhovetski@gmx.de) id 803f0c by 200r.grange (DragonFly Mail Agent v0.9); Wed, 08 Nov 2017 17:00:15 +0100 From: Guennadi Liakhovetski To: linux-media@vger.kernel.org Cc: Laurent Pinchart , Hans Verkuil Subject: [PATCH 3/3 v7] uvcvideo: add a metadata device node Date: Wed, 8 Nov 2017 17:00:14 +0100 Message-Id: <1510156814-28645-4-git-send-email-g.liakhovetski@gmx.de> X-Mailer: git-send-email 1.9.3 In-Reply-To: <1510156814-28645-1-git-send-email-g.liakhovetski@gmx.de> References: <1510156814-28645-1-git-send-email-g.liakhovetski@gmx.de> X-Provags-ID: V03:K0:J7ajfKEee29MvdTXImtDFOSkpYB+DvraZOEY24s+pLxMDz9iVXB SQixfIwGlnTNmscBM6o889XQRVuvpEkdgWwMjorxAOIlylkG6IZA7L6fjvS7wwbl1A7fInS yZ7ekHnaOSXi4ryqMZ7vuZWok3LAnM8sqS43ed5cHWy/8MYyzKYfR7YdfPOOLQnKiIU2LpE cyPRPJznsJcJsF1Dw12RA== X-UI-Out-Filterresults: notjunk:1; V01:K0:FDY7bQ8QgCE=:DYW7W+OzAMJOZLIylgcwVB Hnd8n7Kf5z4PQxA1e2yNmKAen8rlWozodkanANi7qKpqrTpGjU2t7xJqSBqotnvbbIlKSZmuQ Gl+pYSLaeqnbsmWubM2b9ubyFToHEEqRDlLPnEq1CSWoQSxsFclhuWjWebPmWSoTipPB2x2dF Gqfti9rC1t2Q2Ab3RygDxF5fe/8pm/H/UKF1xI6jj3de5bcpGQzrVt6U+CkXt8J0BJ3I6m9TK ElApFA4GN1Dgu6Z21lG5HhU8117GPgU+cYjSpNHaglXipzp+Z7CssG5OVjVAJ3X1OWI6u67lJ Y4/ECRGyYdGI1x1yFm3JsY+ZsQ2snP5p+1VePxSRk8YkSfIr8WyJuc6Dl9CKkqhLmx7wsXA2Q mCdJMpq3jhBIiSD09qcqRCWcVeJ1RWvW2CIdwVK3piZ2a5EhHyXYuBbqpNgVs7ORtNyUyJnFg lRVpoK54b332RqXXI8bVD+3p0Q9u+kjfUxflEbe0hdzqoA83AU/tD3x9aKlYF4K7wHEnRtY+7 /6B1gdMzPKYH86svmdpk+mRo+I0Y3Kp9x9kWcQ0YdtRsAXjHhCRhCJUDCFhaSu6p5tM/Vfv4n yhsGP54lWGgfGpjr57LcUEqPTzgUCewNzsngx1NxO7qlfqDQhRgb98E2NgiXgrI+R3l1dQGOp 3G4I42nraMu6/ExqOqE35egiX5s9e1yuwdfIGRM8JZH1OPBFSFbCZpF0upadVGCjz5/pUHuDX zGOPFJ+jn63+2XlGyJ4gAIs803E/iYHc0bwvC1Zbik32n8sZXuxW9k07taRzb4dNNYhuWUmUc cUapar4WNjlSd6TJ1NyTny9FtOXWQ== Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Some UVC video cameras contain metadata in their payload headers. This patch extracts that data, adding more clock synchronisation information, on both bulk and isochronous endpoints and makes it available to the user space on a separate video node, using the V4L2_CAP_META_CAPTURE capability and the V4L2_BUF_TYPE_META_CAPTURE buffer queue type. Even though different cameras will have different metadata formats, we use the same V4L2_META_FMT_UVC pixel format for all of them. Users have to parse data, based on the specific camera model information. This version of the patch only creates such metadata nodes for cameras, specifying a UVC_QUIRK_METADATA_NODE quirk flag. Signed-off-by: Guennadi Liakhovetski --- v7: support up to two metadata formats per camera - the standard one and an optional private one, if specified in device information drivers/media/usb/uvc/Makefile | 2 +- drivers/media/usb/uvc/uvc_driver.c | 15 +++ drivers/media/usb/uvc/uvc_isight.c | 2 +- drivers/media/usb/uvc/uvc_metadata.c | 204 +++++++++++++++++++++++++++++++++++ drivers/media/usb/uvc/uvc_queue.c | 41 +++++-- drivers/media/usb/uvc/uvc_video.c | 127 ++++++++++++++++++++-- drivers/media/usb/uvc/uvcvideo.h | 19 +++- drivers/media/v4l2-core/v4l2-ioctl.c | 1 + include/uapi/linux/uvcvideo.h | 26 +++++ 9 files changed, 416 insertions(+), 21 deletions(-) create mode 100644 drivers/media/usb/uvc/uvc_metadata.c diff --git a/drivers/media/usb/uvc/Makefile b/drivers/media/usb/uvc/Makefile index c26d12f..06c7cd3 100644 --- a/drivers/media/usb/uvc/Makefile +++ b/drivers/media/usb/uvc/Makefile @@ -1,5 +1,5 @@ uvcvideo-objs := uvc_driver.o uvc_queue.o uvc_v4l2.o uvc_video.o uvc_ctrl.o \ - uvc_status.o uvc_isight.o uvc_debugfs.o + uvc_status.o uvc_isight.o uvc_debugfs.o uvc_metadata.o ifeq ($(CONFIG_MEDIA_CONTROLLER),y) uvcvideo-objs += uvc_entity.o endif diff --git a/drivers/media/usb/uvc/uvc_driver.c b/drivers/media/usb/uvc/uvc_driver.c index cbf79b9..5f7ce97 100644 --- a/drivers/media/usb/uvc/uvc_driver.c +++ b/drivers/media/usb/uvc/uvc_driver.c @@ -1877,6 +1877,7 @@ static void uvc_unregister_video(struct uvc_device *dev) continue; video_unregister_device(&stream->vdev); + video_unregister_device(&stream->meta.vdev); uvc_debugfs_cleanup_stream(stream); } @@ -1934,6 +1935,11 @@ static int uvc_register_video(struct uvc_device *dev, return ret; } + /* Register a metadata node, but ignore a possible failure, complete + * registration of video nodes anyway. + */ + uvc_meta_register(stream); + if (stream->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) stream->chain->caps |= V4L2_CAP_VIDEO_CAPTURE; else @@ -2003,6 +2009,7 @@ static int uvc_register_chains(struct uvc_device *dev) struct uvc_device_info { u32 quirks; + u32 meta_format; }; static int uvc_probe(struct usb_interface *intf, @@ -2038,8 +2045,16 @@ static int uvc_probe(struct usb_interface *intf, dev->udev = usb_get_dev(udev); dev->intf = usb_get_intf(intf); dev->intfnum = intf->cur_altsetting->desc.bInterfaceNumber; + if (uvc_quirks_param != -1 && + uvc_quirks_param & UVC_DEV_FLAG_METADATA_NODE) { + uvc_quirks_param &= ~UVC_DEV_FLAG_METADATA_NODE; + if (uvc_quirks_param == 0) + uvc_quirks_param = -1; + } dev->quirks = (uvc_quirks_param == -1) ? quirks : uvc_quirks_param; + if (info) + dev->meta_format = info->meta_format; if (udev->product != NULL) strlcpy(dev->name, udev->product, sizeof dev->name); diff --git a/drivers/media/usb/uvc/uvc_isight.c b/drivers/media/usb/uvc/uvc_isight.c index 8510e725..fb940cf 100644 --- a/drivers/media/usb/uvc/uvc_isight.c +++ b/drivers/media/usb/uvc/uvc_isight.c @@ -100,7 +100,7 @@ static int isight_decode(struct uvc_video_queue *queue, struct uvc_buffer *buf, } void uvc_video_decode_isight(struct urb *urb, struct uvc_streaming *stream, - struct uvc_buffer *buf) + struct uvc_buffer *buf, struct uvc_buffer *meta_buf) { int ret, i; diff --git a/drivers/media/usb/uvc/uvc_metadata.c b/drivers/media/usb/uvc/uvc_metadata.c new file mode 100644 index 0000000..21eeee9 --- /dev/null +++ b/drivers/media/usb/uvc/uvc_metadata.c @@ -0,0 +1,204 @@ +/* + * uvc_metadata.c -- USB Video Class driver - Metadata handling + * + * Copyright (C) 2016 + * Guennadi Liakhovetski (guennadi.liakhovetski@intel.com) + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + */ + +#include +#include +#include +#include +#include + +#include +#include +#include + +#include "uvcvideo.h" + +/* ----------------------------------------------------------------------------- + * videobuf2 Queue Operations + */ + +/* ----------------------------------------------------------------------------- + * V4L2 ioctls + */ + +static int uvc_meta_v4l2_querycap(struct file *file, void *fh, + struct v4l2_capability *cap) +{ + struct v4l2_fh *vfh = file->private_data; + struct uvc_streaming *stream = video_get_drvdata(vfh->vdev); + + strlcpy(cap->driver, "uvcvideo", sizeof(cap->driver)); + strlcpy(cap->card, vfh->vdev->name, sizeof(cap->card)); + usb_make_path(stream->dev->udev, cap->bus_info, sizeof(cap->bus_info)); + + return 0; +} + +static int uvc_meta_v4l2_get_format(struct file *file, void *fh, + struct v4l2_format *format) +{ + struct v4l2_fh *vfh = file->private_data; + struct uvc_streaming *stream = video_get_drvdata(vfh->vdev); + struct v4l2_meta_format *fmt = &format->fmt.meta; + + if (format->type != vfh->vdev->queue->type) + return -EINVAL; + + memset(fmt, 0, sizeof(*fmt)); + + fmt->dataformat = stream->cur_meta_format; + fmt->buffersize = UVC_METATADA_BUF_SIZE; + + return 0; +} + +static int uvc_meta_v4l2_try_format(struct file *file, void *fh, + struct v4l2_format *format) +{ + struct v4l2_fh *vfh = file->private_data; + struct uvc_streaming *stream = video_get_drvdata(vfh->vdev); + struct uvc_device *dev = stream->dev; + struct v4l2_meta_format *fmt = &format->fmt.meta; + u32 fmeta = fmt->dataformat; + + if (format->type != vfh->vdev->queue->type) + return -EINVAL; + + memset(fmt, 0, sizeof(*fmt)); + + fmt->dataformat = fmeta == dev->meta_format ? fmeta : V4L2_META_FMT_UVC; + fmt->buffersize = UVC_METATADA_BUF_SIZE; + + return 0; +} + +static int uvc_meta_v4l2_set_format(struct file *file, void *fh, + struct v4l2_format *format) +{ + struct v4l2_fh *vfh = file->private_data; + struct uvc_streaming *stream = video_get_drvdata(vfh->vdev); + struct v4l2_meta_format *fmt = &format->fmt.meta; + int ret = uvc_meta_v4l2_try_format(file, fh, format); + if (ret < 0) + return ret; + + /* + * We could in principle switch at any time, also during streaming. + * Metadata buffers would still be perfectly parseable, but it's more + * consistent and cleaner to disallow that + */ + mutex_lock(&stream->mutex); + + if (uvc_queue_allocated(&stream->queue)) + ret = -EBUSY; + else + stream->cur_meta_format = fmt->dataformat; + + mutex_unlock(&stream->mutex); + + return ret; +} + +static int uvc_meta_v4l2_enum_formats(struct file *file, void *fh, + struct v4l2_fmtdesc *fdesc) +{ + struct v4l2_fh *vfh = file->private_data; + struct uvc_streaming *stream = video_get_drvdata(vfh->vdev); + struct uvc_device *dev = stream->dev; + u32 index = fdesc->index; + + if (fdesc->type != vfh->vdev->queue->type || + index > 1U || (index && !dev->meta_format)) + return -EINVAL; + + memset(fdesc, 0, sizeof(*fdesc)); + + fdesc->type = vfh->vdev->queue->type; + fdesc->index = index; + fdesc->pixelformat = index ? dev->meta_format : V4L2_META_FMT_UVC; + + return 0; +} + +static const struct v4l2_ioctl_ops uvc_meta_ioctl_ops = { + .vidioc_querycap = uvc_meta_v4l2_querycap, + .vidioc_g_fmt_meta_cap = uvc_meta_v4l2_get_format, + .vidioc_s_fmt_meta_cap = uvc_meta_v4l2_set_format, + .vidioc_try_fmt_meta_cap = uvc_meta_v4l2_try_format, + .vidioc_enum_fmt_meta_cap = uvc_meta_v4l2_enum_formats, + .vidioc_reqbufs = vb2_ioctl_reqbufs, + .vidioc_querybuf = vb2_ioctl_querybuf, + .vidioc_qbuf = vb2_ioctl_qbuf, + .vidioc_dqbuf = vb2_ioctl_dqbuf, + .vidioc_create_bufs = vb2_ioctl_create_bufs, + .vidioc_prepare_buf = vb2_ioctl_prepare_buf, + .vidioc_streamon = vb2_ioctl_streamon, + .vidioc_streamoff = vb2_ioctl_streamoff, +}; + +/* ----------------------------------------------------------------------------- + * V4L2 File Operations + */ + +static struct v4l2_file_operations uvc_meta_fops = { + .owner = THIS_MODULE, + .unlocked_ioctl = video_ioctl2, + .open = v4l2_fh_open, + .release = vb2_fop_release, + .poll = vb2_fop_poll, + .mmap = vb2_fop_mmap, +}; + +int uvc_meta_register(struct uvc_streaming *stream) +{ + struct uvc_device *dev = stream->dev; + struct uvc_meta_device *meta = &stream->meta; + struct video_device *vdev = &meta->vdev; + struct uvc_video_queue *quvc = &meta->queue; + int ret; + + /* + * Register metadata device nodes only if the METADATA_NODE quirk is + * set. + */ + if (!(dev->quirks & UVC_DEV_FLAG_METADATA_NODE)) + return 0; + + /* COMMENT: consider re-using the code from uvc_driver.c::uvc_register_video() */ + vdev->v4l2_dev = &dev->vdev; + vdev->fops = &uvc_meta_fops; + vdev->ioctl_ops = &uvc_meta_ioctl_ops; + vdev->release = stream->vdev.release; + vdev->prio = &stream->chain->prio; + vdev->vfl_dir = VFL_DIR_RX; + vdev->queue = &quvc->queue; + vdev->device_caps = V4L2_CAP_META_CAPTURE | V4L2_CAP_STREAMING; + strlcpy(vdev->name, dev->name, sizeof(vdev->name)); + + video_set_drvdata(vdev, stream); + + /* Initialize the video buffer queue. */ + ret = uvc_queue_init(quvc, V4L2_BUF_TYPE_META_CAPTURE, 0); + if (ret < 0) + return ret; + + ret = video_register_device(vdev, VFL_TYPE_GRABBER, -1); + if (ret < 0) + uvc_printk(KERN_ERR, + "Failed to register metadata device (%d).\n", ret); + else + kref_get(&dev->ref); + + stream->cur_meta_format = V4L2_META_FMT_UVC; + + return ret; +} diff --git a/drivers/media/usb/uvc/uvc_queue.c b/drivers/media/usb/uvc/uvc_queue.c index c8d78b2..b2998f5 100644 --- a/drivers/media/usb/uvc/uvc_queue.c +++ b/drivers/media/usb/uvc/uvc_queue.c @@ -79,8 +79,19 @@ static int uvc_queue_setup(struct vb2_queue *vq, unsigned int sizes[], struct device *alloc_devs[]) { struct uvc_video_queue *queue = vb2_get_drv_priv(vq); - struct uvc_streaming *stream = uvc_queue_to_stream(queue); - unsigned size = stream->ctrl.dwMaxVideoFrameSize; + struct uvc_streaming *stream; + unsigned int size; + + switch (vq->type) { + case V4L2_BUF_TYPE_META_CAPTURE: + size = UVC_METATADA_BUF_SIZE; + break; + + default: + stream = uvc_queue_to_stream(queue); + size = stream->ctrl.dwMaxVideoFrameSize; + break; + } /* * When called with plane sizes, validate them. The driver supports @@ -114,7 +125,7 @@ static int uvc_buffer_prepare(struct vb2_buffer *vb) buf->error = 0; buf->mem = vb2_plane_vaddr(vb, 0); buf->length = vb2_plane_size(vb, 0); - if (vb->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) + if (vb->type != V4L2_BUF_TYPE_VIDEO_OUTPUT) buf->bytesused = 0; else buf->bytesused = vb2_get_plane_payload(vb, 0); @@ -177,10 +188,10 @@ static int uvc_start_streaming(struct vb2_queue *vq, unsigned int count) static void uvc_stop_streaming(struct vb2_queue *vq) { struct uvc_video_queue *queue = vb2_get_drv_priv(vq); - struct uvc_streaming *stream = uvc_queue_to_stream(queue); unsigned long flags; - uvc_video_enable(stream, 0); + if (vq->type != V4L2_BUF_TYPE_META_CAPTURE) + uvc_video_enable(uvc_queue_to_stream(queue), 0); spin_lock_irqsave(&queue->irqlock, flags); uvc_queue_return_buffers(queue, UVC_BUF_STATE_ERROR); @@ -198,20 +209,36 @@ static void uvc_stop_streaming(struct vb2_queue *vq) .stop_streaming = uvc_stop_streaming, }; +static struct vb2_ops uvc_meta_queue_qops = { + .queue_setup = uvc_queue_setup, + .buf_prepare = uvc_buffer_prepare, + .buf_queue = uvc_buffer_queue, + .wait_prepare = vb2_ops_wait_prepare, + .wait_finish = vb2_ops_wait_finish, + .stop_streaming = uvc_stop_streaming, +}; + int uvc_queue_init(struct uvc_video_queue *queue, enum v4l2_buf_type type, int drop_corrupted) { int ret; queue->queue.type = type; - queue->queue.io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF; + queue->queue.io_modes = VB2_MMAP | VB2_USERPTR; queue->queue.drv_priv = queue; queue->queue.buf_struct_size = sizeof(struct uvc_buffer); - queue->queue.ops = &uvc_queue_qops; queue->queue.mem_ops = &vb2_vmalloc_memops; queue->queue.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC | V4L2_BUF_FLAG_TSTAMP_SRC_SOE; queue->queue.lock = &queue->mutex; + switch (type) { + case V4L2_BUF_TYPE_META_CAPTURE: + queue->queue.ops = &uvc_meta_queue_qops; + break; + default: + queue->queue.io_modes |= VB2_DMABUF; + queue->queue.ops = &uvc_queue_qops; + } ret = vb2_queue_init(&queue->queue); if (ret) return ret; diff --git a/drivers/media/usb/uvc/uvc_video.c b/drivers/media/usb/uvc/uvc_video.c index fb86d6a..034b79b 100644 --- a/drivers/media/usb/uvc/uvc_video.c +++ b/drivers/media/usb/uvc/uvc_video.c @@ -1135,6 +1135,76 @@ static int uvc_video_encode_data(struct uvc_streaming *stream, } /* ------------------------------------------------------------------------ + * Metadata + */ + +/* + * Ideally we want to capture all payload headers for each frame. However their + * number is unknown and unlimited. Additionally to the payload headers we want + * to provide the user with USB Frame Numbers and system time values. We also + * choose to drop headers, containing only a standard header, which either + * contains no SCR value or a value, equal to the previous payload. The + * resulting buffer is composed of blocks, containing a 64-bit timestamp in + * nanoseconds, a 16-bit USB Frame Number, and a copy of the payload header. + */ +static void uvc_video_decode_meta(struct uvc_streaming *stream, + struct uvc_buffer *buf, struct uvc_buffer *meta_buf, + u8 *mem, unsigned int length) +{ + struct uvc_meta_buf *meta; + size_t len_std = 2; + bool has_pts, has_scr; + unsigned long flags; + struct timespec ts; + u8 *scr; + + if (!meta_buf || length == 2 || + meta_buf->length - meta_buf->bytesused < + length + sizeof(meta->ns) + sizeof(meta->sof)) + return; + + has_pts = mem[1] & UVC_STREAM_PTS; + has_scr = mem[1] & UVC_STREAM_SCR; + + if (has_pts) { + len_std += 4; + scr = mem + 6; + } else { + scr = mem + 2; + } + + if (has_scr) + len_std += 6; + + if (stream->cur_meta_format == V4L2_META_FMT_UVC) + length = len_std; + + if (length == len_std && (!has_scr || + !memcmp(scr, stream->clock.last_scr, 6))) + return; + + meta = (struct uvc_meta_buf *)((u8 *)meta_buf->mem + meta_buf->bytesused); + local_irq_save(flags); + uvc_video_get_ts(&ts); + meta->sof = usb_get_current_frame_number(stream->dev->udev); + local_irq_restore(flags); + meta->ns = timespec_to_ns(&ts); + + if (has_scr) + memcpy(stream->clock.last_scr, scr, 6); + + memcpy(&meta->length, mem, length); + meta_buf->bytesused += length + sizeof(meta->ns) + sizeof(meta->sof); + + uvc_trace(UVC_TRACE_FRAME, + "%s(): t-sys %lu.%09lus, SOF %u, len %u, flags 0x%x, PTS %u, STC %u frame SOF %u\n", + __func__, ts.tv_sec, ts.tv_nsec, meta->sof, + meta->length, meta->flags, has_pts ? *(u32 *)meta->buf : 0, + has_scr ? *(u32 *)scr : 0, + has_scr ? *(u32 *)(scr + 4) & 0x7ff : 0); +} + +/* ------------------------------------------------------------------------ * URB handling */ @@ -1152,8 +1222,28 @@ static void uvc_video_validate_buffer(const struct uvc_streaming *stream, /* * Completion handler for video URBs. */ + +static struct uvc_buffer *uvc_video_step_buffers(struct uvc_streaming *stream, + struct uvc_buffer *video_buf, struct uvc_buffer **meta_buf) +{ + if (*meta_buf) { + struct vb2_v4l2_buffer *vb2_meta = &(*meta_buf)->buf; + const struct vb2_v4l2_buffer *vb2_video = &video_buf->buf; + + vb2_meta->sequence = vb2_video->sequence; + vb2_meta->field = vb2_video->field; + vb2_meta->vb2_buf.timestamp = vb2_video->vb2_buf.timestamp; + + (*meta_buf)->state = UVC_BUF_STATE_READY; + (*meta_buf)->error = video_buf->error; + *meta_buf = uvc_queue_next_buffer(&stream->meta.queue, + *meta_buf); + } + return uvc_queue_next_buffer(&stream->queue, video_buf); +} + static void uvc_video_decode_isoc(struct urb *urb, struct uvc_streaming *stream, - struct uvc_buffer *buf) + struct uvc_buffer *buf, struct uvc_buffer *meta_buf) { u8 *mem; int ret, i; @@ -1175,14 +1265,16 @@ static void uvc_video_decode_isoc(struct urb *urb, struct uvc_streaming *stream, urb->iso_frame_desc[i].actual_length); if (ret == -EAGAIN) { uvc_video_validate_buffer(stream, buf); - buf = uvc_queue_next_buffer(&stream->queue, - buf); + buf = uvc_video_step_buffers(stream, buf, + &meta_buf); } } while (ret == -EAGAIN); if (ret < 0) continue; + uvc_video_decode_meta(stream, buf, meta_buf, mem, ret); + /* Decode the payload data. */ uvc_video_decode_data(stream, buf, mem + ret, urb->iso_frame_desc[i].actual_length - ret); @@ -1193,13 +1285,13 @@ static void uvc_video_decode_isoc(struct urb *urb, struct uvc_streaming *stream, if (buf->state == UVC_BUF_STATE_READY) { uvc_video_validate_buffer(stream, buf); - buf = uvc_queue_next_buffer(&stream->queue, buf); + buf = uvc_video_step_buffers(stream, buf, &meta_buf); } } } static void uvc_video_decode_bulk(struct urb *urb, struct uvc_streaming *stream, - struct uvc_buffer *buf) + struct uvc_buffer *buf, struct uvc_buffer *meta_buf) { u8 *mem; int len, ret; @@ -1222,8 +1314,8 @@ static void uvc_video_decode_bulk(struct urb *urb, struct uvc_streaming *stream, do { ret = uvc_video_decode_start(stream, buf, mem, len); if (ret == -EAGAIN) - buf = uvc_queue_next_buffer(&stream->queue, - buf); + buf = uvc_video_step_buffers(stream, buf, + &meta_buf); } while (ret == -EAGAIN); /* If an error occurred skip the rest of the payload. */ @@ -1233,6 +1325,8 @@ static void uvc_video_decode_bulk(struct urb *urb, struct uvc_streaming *stream, memcpy(stream->bulk.header, mem, ret); stream->bulk.header_size = ret; + uvc_video_decode_meta(stream, buf, meta_buf, mem, ret); + mem += ret; len -= ret; } @@ -1256,7 +1350,7 @@ static void uvc_video_decode_bulk(struct urb *urb, struct uvc_streaming *stream, uvc_video_decode_end(stream, buf, stream->bulk.header, stream->bulk.payload_size); if (buf->state == UVC_BUF_STATE_READY) - uvc_queue_next_buffer(&stream->queue, buf); + uvc_video_step_buffers(stream, buf, &meta_buf); } stream->bulk.header_size = 0; @@ -1266,7 +1360,7 @@ static void uvc_video_decode_bulk(struct urb *urb, struct uvc_streaming *stream, } static void uvc_video_encode_bulk(struct urb *urb, struct uvc_streaming *stream, - struct uvc_buffer *buf) + struct uvc_buffer *buf, struct uvc_buffer *meta_buf) { u8 *mem = urb->transfer_buffer; int len = stream->urb_size, ret; @@ -1312,7 +1406,10 @@ static void uvc_video_complete(struct urb *urb) { struct uvc_streaming *stream = urb->context; struct uvc_video_queue *queue = &stream->queue; + struct uvc_video_queue *qmeta = &stream->meta.queue; + struct vb2_queue *vb2_qmeta = stream->meta.vdev.queue; struct uvc_buffer *buf = NULL; + struct uvc_buffer *buf_meta = NULL; unsigned long flags; int ret; @@ -1331,6 +1428,8 @@ static void uvc_video_complete(struct urb *urb) case -ECONNRESET: /* usb_unlink_urb() called. */ case -ESHUTDOWN: /* The endpoint is being disabled. */ uvc_queue_cancel(queue, urb->status == -ESHUTDOWN); + if (vb2_qmeta) + uvc_queue_cancel(qmeta, urb->status == -ESHUTDOWN); return; } @@ -1340,7 +1439,15 @@ static void uvc_video_complete(struct urb *urb) queue); spin_unlock_irqrestore(&queue->irqlock, flags); - stream->decode(urb, stream, buf); + if (vb2_qmeta) { + spin_lock_irqsave(&qmeta->irqlock, flags); + if (!list_empty(&qmeta->irqqueue)) + buf_meta = list_first_entry(&qmeta->irqqueue, + struct uvc_buffer, queue); + spin_unlock_irqrestore(&qmeta->irqlock, flags); + } + + stream->decode(urb, stream, buf, buf_meta); if ((ret = usb_submit_urb(urb, GFP_ATOMIC)) < 0) { uvc_printk(KERN_ERR, "Failed to resubmit video URB (%d).\n", diff --git a/drivers/media/usb/uvc/uvcvideo.h b/drivers/media/usb/uvc/uvcvideo.h index 34c7ee6..a657bc1 100644 --- a/drivers/media/usb/uvc/uvcvideo.h +++ b/drivers/media/usb/uvc/uvcvideo.h @@ -185,6 +185,7 @@ #define UVC_QUIRK_RESTRICT_FRAME_RATE 0x00000200 #define UVC_QUIRK_RESTORE_CTRLS_ON_INIT 0x00000400 #define UVC_QUIRK_FORCE_Y8 0x00000800 +#define UVC_DEV_FLAG_METADATA_NODE 0x80000000 /* Format flags */ #define UVC_FMT_FLAG_COMPRESSED 0x00000001 @@ -473,6 +474,13 @@ struct uvc_stats_stream { unsigned int max_sof; /* Maximum STC.SOF value */ }; +struct uvc_meta_device { + struct video_device vdev; + struct uvc_video_queue queue; +}; + +#define UVC_METATADA_BUF_SIZE 1024 + struct uvc_streaming { struct list_head list; struct uvc_device *dev; @@ -504,7 +512,10 @@ struct uvc_streaming { unsigned int frozen : 1; struct uvc_video_queue queue; void (*decode) (struct urb *urb, struct uvc_streaming *video, - struct uvc_buffer *buf); + struct uvc_buffer *buf, struct uvc_buffer *meta_buf); + + struct uvc_meta_device meta; + __u32 cur_meta_format; /* Context data used by the bulk completion handler. */ struct { @@ -546,6 +557,8 @@ struct uvc_streaming { u16 last_sof; u16 sof_offset; + u8 last_scr[6]; + spinlock_t lock; } clock; }; @@ -555,6 +568,7 @@ struct uvc_device { struct usb_interface *intf; unsigned long warnings; __u32 quirks; + __u32 meta_format; int intfnum; char name[32]; @@ -709,6 +723,7 @@ extern int uvc_query_ctrl(struct uvc_device *dev, __u8 query, __u8 unit, void uvc_video_clock_update(struct uvc_streaming *stream, struct vb2_v4l2_buffer *vbuf, struct uvc_buffer *buf); +int uvc_meta_register(struct uvc_streaming *stream); /* Status */ extern int uvc_status_init(struct uvc_device *dev); @@ -763,7 +778,7 @@ extern struct usb_host_endpoint *uvc_find_endpoint( /* Quirks support */ void uvc_video_decode_isight(struct urb *urb, struct uvc_streaming *stream, - struct uvc_buffer *buf); + struct uvc_buffer *buf, struct uvc_buffer *meta_buf); /* debugfs and statistics */ void uvc_debugfs_init(void); diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c b/drivers/media/v4l2-core/v4l2-ioctl.c index 7961499..fba8021 100644 --- a/drivers/media/v4l2-core/v4l2-ioctl.c +++ b/drivers/media/v4l2-core/v4l2-ioctl.c @@ -1246,6 +1246,7 @@ static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt) case V4L2_TCH_FMT_TU08: descr = "8-bit unsigned touch data"; break; case V4L2_META_FMT_VSP1_HGO: descr = "R-Car VSP1 1-D Histogram"; break; case V4L2_META_FMT_VSP1_HGT: descr = "R-Car VSP1 2-D Histogram"; break; + case V4L2_META_FMT_UVC: descr = "UVC payload header metadata"; break; default: /* Compressed formats */ diff --git a/include/uapi/linux/uvcvideo.h b/include/uapi/linux/uvcvideo.h index 3b08186..8381ca7c 100644 --- a/include/uapi/linux/uvcvideo.h +++ b/include/uapi/linux/uvcvideo.h @@ -67,4 +67,30 @@ struct uvc_xu_control_query { #define UVCIOC_CTRL_MAP _IOWR('u', 0x20, struct uvc_xu_control_mapping) #define UVCIOC_CTRL_QUERY _IOWR('u', 0x21, struct uvc_xu_control_query) +/* + * Metadata node + */ + +/** + * struct uvc_meta_buf - metadata buffer building block + * @ns - system timestamp of the payload in nanoseconds + * @sof - USB Frame Number + * @length - length of the payload header + * @flags - payload header flags + * @buf - optional device-specific header data + * + * UVC metadata nodes fill buffers with possibly multiple instances of this + * struct. The first two fields are added by the driver, they can be used for + * clock synchronisation. The rest is an exact copy of a UVC payload header. + * Only complete objects with complete buffers are included. Therefore it's + * always sizeof(meta->ts) + sizeof(meta->sof) + meta->length bytes large. + */ +struct uvc_meta_buf { + __u64 ns; + __u16 sof; + __u8 length; + __u8 flags; + __u8 buf[]; +} __packed; + #endif