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v4l2deviceprovider: Ignore touch sensing devices

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With GST_V4L2_USE_LIBV4L2=1, my laptop's touchpad shows up as a video
source device in gst-device-monitor, but attempting to stream from it
fails because the device doesn't actually support any video formats.

name  : Synaptics RMI4 Touch Sensor
class : Video/Source
caps  : video/x-raw, format=(string)I420, framerate=(fraction)[ 0/1, 2147483647/1 ], width=(int)0, height=(int)0, interlace-mode=(string)progressive, pixel-aspect-ratio=(fraction)1/1;
        video/x-raw, format=(string)YV12, framerate=(fraction)[ 0/1, 2147483647/1 ], width=(int)0, height=(int)0, interlace-mode=(string)progressive, pixel-aspect-ratio=(fraction)1/1;
        video/x-raw, format=(string)BGR, framerate=(fraction)[ 0/1, 2147483647/1 ], width=(int)0, height=(int)0, interlace-mode=(string)progressive, pixel-aspect-ratio=(fraction)1/1;
        video/x-raw, format=(string)RGB, framerate=(fraction)[ 0/1, 2147483647/1 ], width=(int)0, height=(int)0, interlace-mode=(string)progressive, pixel-aspect-ratio=(fraction)1/1;
properties:
        udev-probed = true
        device.bus_path = /sys/devices/rmi4-00/rmi4-00.fn54/video4linux/v4l-touch0
        sysfs.path = /sys/devices/rmi4-00/rmi4-00.fn54/video4linux/v4l-touch0
        device.subsystem = video4linux
        device.product.name = "Synaptics\ RMI4\ Touch\ Sensor"
        device.capabilities = :capture:
        device.api = v4l2
        device.path = /dev/v4l-touch0
        v4l2.device.driver = rmi4_f54
        v4l2.device.card = "Synaptics\ RMI4\ Touch\ Sensor"
        v4l2.device.bus_info = rmi4:rmi4-00.fn54
        v4l2.device.version = 265480 (0x00040d08)
        v4l2.device.capabilities = 2501902337 (0x95200001)
        v4l2.device.device_caps = 354418689 (0x15200001)
gst-launch-1.0 v4l2src device=/dev/v4l-touch0 ! ...

v4l2-ctl -d /dev/v4l-touch0 --list-formats reports:

ioctl: VIDIOC_ENUM_FMT
        Index       : 0
        Type        : Video Capture
        Pixel Format: 'TD16'
        Name        : 16-bit signed deltas

        Index       : 1
        Type        : Video Capture
        Pixel Format: 'TD08'
        Name        : 8-bit signed deltas

        Index       : 2
        Type        : Video Capture
        Pixel Format: 'TU16'
        Name        : 16-bit unsigned touch data

https://bugzilla.gnome.org/show_bug.cgi?id=789197
This commit is contained in:
Jan Alexander Steffens (heftig) 2017-10-19 14:02:37 +02:00 committed by Nicolas Dufresne
parent 593615de46
commit 7e4bc6d418
1 changed files with 6 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

7
sys/v4l2/gstv4l2deviceprovider.c
View file

@ -136,8 +136,13 @@ gst_v4l2_device_provider_probe_device (GstV4l2DeviceProvider * provider,
v4l2obj->vcap.device_caps, NULL);
if (v4l2obj->device_caps &
(V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_VIDEO_CAPTURE_MPLANE))
(V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_VIDEO_CAPTURE_MPLANE)) {
/* We ignore touch sensing devices; those are't really video */
if (v4l2obj->device_caps & V4L2_CAP_TOUCH)
goto close;
type = GST_V4L2_DEVICE_TYPE_SOURCE;
}
if (v4l2obj->device_caps &
(V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_VIDEO_OUTPUT_MPLANE)) {