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From: Ricardo Ribalda <ribalda@chromium.org>
To: Laurent Pinchart <laurent.pinchart@ideasonboard.com>,
	Mauro Carvalho Chehab <mchehab@kernel.org>,
	Hans Verkuil <hverkuil-cisco@xs4all.nl>,
	Sergey Senozhatsky <sergey.senozhatsky@gmail.com>,
	linux-media@vger.kernel.org, linux-kernel@vger.kernel.org,
	tfiga@chromium.org
Cc: Ricardo Ribalda <ribalda@chromium.org>
Subject: [PATCH v5 09/13] media: uvcvideo: Increase the size of UVC_METADATA_BUF_SIZE
Date: Tue, 16 Mar 2021 18:59:59 +0100	[thread overview]
Message-ID: <20210316180004.1605727-10-ribalda@chromium.org> (raw)
In-Reply-To: <20210316180004.1605727-1-ribalda@chromium.org>

Hans has discovered that in his test device, for the H264 format
bytesused goes up to about 570, for YUYV it will actually go up
to a bit over 5000 bytes, and for MJPG up to about 2706 bytes.

We should also, according to V4L2_META_FMT_UVC docs, drop headers when
the buffer is full.

Credit-to: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Ricardo Ribalda <ribalda@chromium.org>
---
 drivers/media/usb/uvc/uvc_video.c | 8 +++++---
 drivers/media/usb/uvc/uvcvideo.h  | 2 +-
 2 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/drivers/media/usb/uvc/uvc_video.c b/drivers/media/usb/uvc/uvc_video.c
index 25fd8aa23529..ea2903dc3252 100644
--- a/drivers/media/usb/uvc/uvc_video.c
+++ b/drivers/media/usb/uvc/uvc_video.c
@@ -1244,11 +1244,13 @@ static void uvc_video_decode_meta(struct uvc_streaming *stream,
 	if (!meta_buf || length == 2)
 		return;
 
+	/*
+	 * According to V4L2_META_FMT_UVC docs, we should drop headers when
+	 * the buffer is full.
+	 */
 	if (meta_buf->length - meta_buf->bytesused <
-	    length + sizeof(meta->ns) + sizeof(meta->sof)) {
-		meta_buf->error = 1;
+	    length + sizeof(meta->ns) + sizeof(meta->sof))
 		return;
-	}
 
 	has_pts = mem[1] & UVC_STREAM_PTS;
 	has_scr = mem[1] & UVC_STREAM_SCR;
diff --git a/drivers/media/usb/uvc/uvcvideo.h b/drivers/media/usb/uvc/uvcvideo.h
index b81d3f65e52e..a26bbec8d37b 100644
--- a/drivers/media/usb/uvc/uvcvideo.h
+++ b/drivers/media/usb/uvc/uvcvideo.h
@@ -527,7 +527,7 @@ struct uvc_stats_stream {
 	unsigned int max_sof;		/* Maximum STC.SOF value */
 };
 
-#define UVC_METADATA_BUF_SIZE 1024
+#define UVC_METADATA_BUF_SIZE 10240
 
 /**
  * struct uvc_copy_op: Context structure to schedule asynchronous memcpy
-- 
2.31.0.rc2.261.g7f71774620-goog


  parent reply	other threads:[~2021-03-16 18:03 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-16 17:59 [PATCH v5 00/13] uvcvideo: Fix v4l2-compliance errors Ricardo Ribalda
2021-03-16 17:59 ` [PATCH v5 01/13] media: v4l2-ioctl: Fix check_ext_ctrls Ricardo Ribalda
2021-03-17 10:36   ` Hans Verkuil
2021-03-16 17:59 ` [PATCH v5 02/13] media: uvcvideo: Set capability in s_param Ricardo Ribalda
2021-03-16 17:59 ` [PATCH v5 03/13] media: uvcvideo: Return -EIO for control errors Ricardo Ribalda
2021-03-16 17:59 ` [PATCH v5 04/13] media: uvcvideo: Check controls flags before accessing them Ricardo Ribalda
2021-03-17 10:50   ` Hans Verkuil
2021-03-16 17:59 ` [PATCH v5 05/13] media: uvcvideo: refactor __uvc_ctrl_add_mapping Ricardo Ribalda
2021-03-16 17:59 ` [PATCH v5 06/13] media: uvcvideo: Add support for V4L2_CTRL_TYPE_CTRL_CLASS Ricardo Ribalda
2021-03-16 17:59 ` [PATCH v5 07/13] media: uvcvideo: Use dev->name for querycap() Ricardo Ribalda
2021-03-17 10:57   ` Hans Verkuil
2021-03-16 17:59 ` [PATCH v5 08/13] media: uvcvideo: Set unique vdev name based in type Ricardo Ribalda
2021-03-16 17:59 ` Ricardo Ribalda [this message]
2021-03-17 11:01   ` [PATCH v5 09/13] media: uvcvideo: Increase the size of UVC_METADATA_BUF_SIZE Hans Verkuil
2021-03-16 18:00 ` [PATCH v5 10/13] media: uvcvideo: Return -EACCES to inactive controls Ricardo Ribalda
2021-03-17 11:26   ` Hans Verkuil
2021-03-16 18:00 ` [PATCH v5 11/13] media: uvcvideo: Use control names from framework Ricardo Ribalda
2021-03-17 11:29   ` Hans Verkuil
2021-03-16 18:00 ` [PATCH v5 12/13] media: v4l2-ioctl: Set error_idx to the right value Ricardo Ribalda
2021-03-17 11:39   ` Hans Verkuil
2021-03-16 18:00 ` [PATCH v5 13/13] uvc: use vb2 ioctl and fop helpers Ricardo Ribalda

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