[Bug 699337] New: v4l2: fix and cleanup VIDIOC_EXPBUF handling
GStreamer (bugzilla.gnome.org)
bugzilla at gnome.org
Tue Apr 30 08:58:21 PDT 2013
https://bugzilla.gnome.org/show_bug.cgi?id=699337
GStreamer | gst-plugins-good | git
Summary: v4l2: fix and cleanup VIDIOC_EXPBUF handling
Classification: Platform
Product: GStreamer
Version: git
OS/Version: Linux
Status: UNCONFIRMED
Severity: normal
Priority: Normal
Component: gst-plugins-good
AssignedTo: gstreamer-bugs at lists.freedesktop.org
ReportedBy: m.olbrich at pengutronix.de
QAContact: gstreamer-bugs at lists.freedesktop.org
GNOME version: ---
Created an attachment (id=242947)
--> (https://bugzilla.gnome.org/attachment.cgi?id=242947)
patch
With this patch VIDIOC_EXPBUF actually works, or a correct warning is printed.
However the whole DMABUF code is currently broken.
V4L2_MEMORY_DMABUF is an alternative to V4L2_MEMORY_USERPTR that can be used to
queue other DMABUF file descriptors. To create new DMABUF file descriptors
V4L2_MEMORY_MMAP + VIDIOC_EXPBUF must be used. The two modes cannot be mixed.
Right now QBUF fails because the device is configured for MMAP and a DMABUF
buffer is queued.
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