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Date: Wed, 17 Dec 2014 14:12:26 +0100
From: Jean-Michel Hautbois <jean-michel.hautbois@...alys.com>
To: Nicolas Dufresne <nicolas.dufresne@...labora.com>
Cc: Philipp Zabel <p.zabel@...gutronix.de>,
Steve Longerbeam <slongerbeam@...il.com>,
linux-kernel <linux-kernel@...r.kernel.org>,
Frédéric Sureau <frederic.sureau@...alys.com>,
Fabio Estevam <fabio.estevam@...escale.com>
Subject: Re: i.MX6 CSC and scaler
2014-12-16 15:50 GMT+01:00 Nicolas Dufresne <nicolas.dufresne@...labora.com>:
>
> Le 2014-12-16 09:27, Jean-Michel Hautbois a écrit :
>>
>> Have you already started something about that ?
>
> Yes, currently I do cropping right if there is no scaling. Doing this with
> S_CROP is really ackward, but very few m2m driver has been ported to
> G_SELECTION yet. The v4l2transform was tested to run with Exynos 4 FIMC
> driver. There was still issue with such driver doing middle rounding for
> alignment. This has been reported on this list. The proposed solution is to
> add flags to our internal alignment method, and update these driver to pick
> a direction.
Right now, I can get the driver probed (twice, as I have two IPUs) and
gstreamer creates two elements :
$> rm .cache/gstreamer-1.0/registry.arm.bin
$>
gst-inspect-1.0 |grep v4l2
video4linux2: v4l2video3videodec: V4L2 Video Decoder
video4linux2: v4l2video2h264enc: V4L2 H.264 Encoder
video4linux2: v4l2video1convert: V4L2 Video Converter
video4linux2: v4l2video0convert: V4L2 Video Converter
video4linux2: v4l2deviceprovider (GstDeviceProviderFactory)
video4linux2: v4l2radio: Radio (video4linux2) Tuner
video4linux2: v4l2sink: Video (video4linux2) Sink
video4linux2: v4l2src: Video (video4linux2) Source
$> gst-inspect-1.0 v4l2video0convert
Factory Details:
Rank none (0)
Long-name V4L2 Video Converter
Klass Filter/Converter/Video
Description Transform streams via V4L2 API
Author Nicolas Dufresne <nicolas.dufresne@...labora.com>
Plugin Details:
Name video4linux2
Description elements for Video 4 Linux
Filename /usr/lib/gstreamer-1.0/libgstvideo4linux2.so
Version 1.5.0.1
License LGPL
Source module gst-plugins-good
Source release date 2014-12-15 11:41 (UTC)
Binary package GStreamer Good Plug-ins git
Origin URL Unknown package origin
GObject
+----GInitiallyUnowned
+----GstObject
+----GstElement
+----GstBaseTransform
+----GstV4l2Transform
+----v4l2video0convert
Pad Templates:
SINK template: 'sink'
Availability: Always
Capabilities:
video/x-raw
format: { RGB16, RGB, BGR, xRGB, ARGB, BGRx, BGRA,
YUY2, UYVY, I420, YV12, NV12, NV21, Y42B }
width: [ 1, 32768 ]
height: [ 1, 32768 ]
framerate: [ 0/1, 100/1 ]
SRC template: 'src'
Availability: Always
Capabilities:
video/x-raw
format: { RGB16, RGB, BGR, xRGB, ARGB, BGRx, BGRA,
YUY2, UYVY, I420, YV12, NV12, NV21, Y42B }
width: [ 1, 32768 ]
height: [ 1, 32768 ]
framerate: [ 0/1, 100/1 ]
Element Flags:
no flags set
Element Implementation:
Has change_state() function: gst_v4l2_transform_change_state
Element has no clocking capabilities.
Element has no URI handling capabilities.
Pads:
SINK: 'sink'
Pad Template: 'sink'
SRC: 'src'
Pad Template: 'src'
Element Properties:
name : The name of the object
flags: readable, writable
String. Default: "v4l2video0convert0"
parent : The parent of the object
flags: readable, writable
Object of type "GstObject"
qos : Handle Quality-of-Service events
flags: readable, writable
Boolean. Default: true
device : Device location
flags: readable
String. Default: "/dev/video0"
device-name : Name of the device
flags: readable
String. Default: "mx6-m2m"
device-fd : File descriptor of the device
flags: readable
Integer. Range: -1 - 2147483647 Default: -1
output-io-mode : Output side I/O mode (matches sink pad)
flags: readable, writable
Enum "GstV4l2IOMode" Default: 0, "auto"
(0): auto - GST_V4L2_IO_AUTO
(1): rw - GST_V4L2_IO_RW
(2): mmap - GST_V4L2_IO_MMAP
(3): userptr - GST_V4L2_IO_USERPTR
(4): dmabuf - GST_V4L2_IO_DMABUF
(5): dmabuf-import - GST_V4L2_IO_DMABUF_IMPORT
capture-io-mode : Capture I/O mode (matches src pad)
flags: readable, writable
Enum "GstV4l2IOMode" Default: 0, "auto"
(0): auto - GST_V4L2_IO_AUTO
(1): rw - GST_V4L2_IO_RW
(2): mmap - GST_V4L2_IO_MMAP
(3): userptr - GST_V4L2_IO_USERPTR
(4): dmabuf - GST_V4L2_IO_DMABUF
(5): dmabuf-import - GST_V4L2_IO_DMABUF_IMPORT
extra-controls : Extra v4l2 controls (CIDs) for the device
flags: readable, writable
Boxed pointer of type "GstStructure"
When I try to use it, the driver fails to work, because S_FMT needs to
be called first.
$> gst-launch-1.0 -vve videotestsrc !
'video/x-raw,format=YUY2,width=320,height=240' ! v4l2video0convert !
'video/x-raw,format=NV12,width=320,height=240' ! fakesink
Setting pipeline to PAUSED ...
Pipeline is PREROLLING ...
ERROR: from element
/GstPipeline:pipeline0/GstVideoTestSrc:videotestsrc0: Internal data
flow error.
$> dmesg
[10005.548047] mx6-m2m ipum2m@...1: call capture S_FMT first to
determine segmentation
[10005.555784] mx6-m2m ipum2m@...1: call capture S_FMT first to
determine segmentation
[10005.563482] mx6-m2m ipum2m@...1: call capture S_FMT first to
determine segmentation
[10005.571225] mx6-m2m ipum2m@...1: call capture S_FMT first to
determine segmentation
[10005.578925] mx6-m2m ipum2m@...1: call capture S_FMT first to
determine segmentation
[10005.586781] mx6-m2m ipum2m@...1: call capture S_FMT first to
determine segmentation
[10005.594583] mx6-m2m ipum2m@...1: call capture S_FMT first to
determine segmentation
[10005.602292] mx6-m2m ipum2m@...1: call capture S_FMT first to
determine segmentation
[10005.610125] mx6-m2m ipum2m@...1: call capture S_FMT first to
determine segmentation
[10005.617864] mx6-m2m ipum2m@...1: call capture S_FMT first to
determine segmentation
[10005.625559] mx6-m2m ipum2m@...1: call capture S_FMT first to
determine segmentation
[10005.633970] mx6-m2m ipum2m@...1: call capture S_FMT first to
determine segmentation
[10005.641730] mx6-m2m ipum2m@...1: call capture S_FMT first to
determine segmentation
[10005.649488] mx6-m2m ipum2m@...1: call capture S_FMT first to
determine segmentation
[10005.657217] mx6-m2m ipum2m@...1: call capture S_FMT first to
determine segmentation
[10005.664927] mx6-m2m ipum2m@...1: call capture S_FMT first to
determine segmentation
[10005.672629] mx6-m2m ipum2m@...1: call capture S_FMT first to
determine segmentation
[10005.680336] mx6-m2m ipum2m@...1: call capture S_FMT first to
determine segmentation
[10005.688070] mx6-m2m ipum2m@...1: call capture S_FMT first to
determine segmentation
[10005.695770] mx6-m2m ipum2m@...1: call capture S_FMT first to
determine segmentation
[10005.703457] mx6-m2m ipum2m@...1: call capture S_FMT first to
determine segmentation
[10005.711184] mx6-m2m ipum2m@...1: call capture S_FMT first to
determine segmentation
[10005.718880] mx6-m2m ipum2m@...1: call capture S_FMT first to
determine segmentation
[10005.727170] mx6-m2m ipum2m@...1: call capture S_FMT first to
determine segmentation
[10005.734885] mx6-m2m ipum2m@...1: call capture S_FMT first to
determine segmentation
[10005.742592] mx6-m2m ipum2m@...1: call capture S_FMT first to
determine segmentation
[10005.750301] mx6-m2m ipum2m@...1: call capture S_FMT first to
determine segmentation
[10005.758205] mx6-m2m ipum2m@...1: call capture S_FMT first to
determine segmentation
[10005.765910] mx6-m2m ipum2m@...1: call capture S_FMT first to
determine segmentation
[10005.773603] mx6-m2m ipum2m@...1: call capture S_FMT first to
determine segmentation
[10005.781334] mx6-m2m ipum2m@...1: call capture S_FMT first to
determine segmentation
[10005.789028] mx6-m2m ipum2m@...1: call capture S_FMT first to
determine segmentation
[10005.796743] mx6-m2m ipum2m@...1: call capture S_FMT first to
determine segmentation
[10005.804444] mx6-m2m ipum2m@...1: call capture S_FMT first to
determine segmentation
[10005.812141] mx6-m2m ipum2m@...1: call capture S_FMT first to
determine segmentation
[10005.819862] mx6-m2m ipum2m@...1: call capture S_FMT first to
determine segmentation
So, basically it should be working because using v4l2-ctl I can do :
$> v4l2-ctl -d0 --set-fmt-video=width=320,height=240,pixelformat=5
--set-fmt-video-out=width=1920,height=1080,pixelformat=NV12
[10127.455820] mx6-m2m ipum2m@...1: Capture format: 320x240 (1 320x240
segments), YUYV
[10127.463584] mx6-m2m ipum2m@...1: Output format: 1920x1080 (1
1920x1080 segments), NV12
I may need some help in order to modify the gstreamer plugin now ;-).
JM
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